312 results match your criteria Applied Composite Materials[Journal]


The Impact of Draping Effects on the Stiffness and Failure Behavior of Unidirectional Non-Crimp Fabric Fiber Reinforced Composites.

Materials (Basel) 2020 Jul 2;13(13). Epub 2020 Jul 2.

Karlsruhe Institute of Technology (KIT), Institute of Vehicle System Technology (FAST), Lightweight Technology (LBT), Rintheimer Querallee 2, D-76131 Karlsruhe, Germany.

Unidirectional non-crimp fabrics (UD-NCF) are often used to exploit the lightweight potential of continuous fiber reinforced plastics (CoFRP). During the draping process, the UD-NCF fabric can undergo large deformations that alter the local fiber orientation, the local fiber volume content (FVC) and create local fiber waviness. Especially the FVC is affected and has a large impact on the mechanical properties. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13132959DOI Listing

Identification of Stress States in Compressed Masonry Walls Using a Non-Destructive Technique (NDT).

Materials (Basel) 2020 Jun 25;13(12). Epub 2020 Jun 25.

Department of Building Structures and Laboratory of Civil Engineering Faculty, Silesian University of Technology, ul. Akademicka 5, 44-100 Gliwice, Poland.

The structure safety can be assessed, but only indirectly, by identifying material properties, geometry of structures, and values of loads. The complete and comprehensive assessment can be done only after determining internal forces acting inside structures. Ultrasonic extensometry using an acoustoelastic effect (AE) is among the most common non-destructive techniques (NDT) of determining true stresses in structures. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122852DOI Listing

Harmony Search Optimisation of Dispersed Laminated Composite Plates.

Materials (Basel) 2020 Jun 26;13(12). Epub 2020 Jun 26.

College of IT Convergence, Gachon University, Seongnam 13120, Korea.

One of the major goals in the process of designing structural components is to achieve the highest possible buckling load of the structural component while keeping the cost and weight at a minimum. This paper illustrates the application of the harmony search algorithm to the buckling load maximisation of dispersed laminated composite plates with rectangular geometry. The ply thicknesses and fiber orientation angles of the plies were chosen as the design variables. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122862DOI Listing

The Impact of Surface Preparation for Self-Compacting, High-Performance, Fiber-Reinforced Concrete Confined with CFRP Using a Cement Matrix.

Materials (Basel) 2020 Jun 24;13(12). Epub 2020 Jun 24.

Faculty of Mining and Geoengineering, AGH University of Science and Technology, 30 Adama Mickiewicza Str., 30-059 Cracow, Poland.

With the development of concrete technology, the tendency to combine different materials with each other to achieve a greater efficiency and durability of structures can be observed. In the modern construction industry, various materials and techniques are increasingly being combined in order to achieve e.g. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122830DOI Listing

Nanosecond Laser Etching of Aluminum-Plated Composite Materials Applied to Frequency Selective Surfaces.

Materials (Basel) 2020 Jun 22;13(12). Epub 2020 Jun 22.

School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China.

High-quality frequency selective surfaces (FSSs) are important for electromagnetic signal absorption/filtration. Usually, they are made from wave-transparent composite materials covered with a thin metal layer. Current machining methods show some disadvantages when performing fabrication on the structure. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122808DOI Listing

Optimization of Multilayered Walls for Building Envelopes Including PCM-Based Composites.

Materials (Basel) 2020 Jun 20;13(12). Epub 2020 Jun 20.

Institut für Werkstoffe im Bauwesen, Technische Universität Darmstadt, 64287 Darmstadt, Germany.

This work proposes a numerical procedure to simulate and optimize the thermal response of a multilayered wallboard system for building envelopes, where each layer can be possibly made of Phase Change Materials (PCM)-based composites to take advantage of their Thermal-Energy Storage (TES) capacity. The simulation step consists in solving the transient heat conduction equation across the whole wallboard using the enthalpy-based finite element method. The weather is described in detail by the Typical Meteorological Year (TMY) of the building location. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122787DOI Listing

Performance Evaluation and Optimization of Dyes Removal using Rice Bran-Based Magnetic Composite Adsorbent.

Materials (Basel) 2020 Jun 18;13(12). Epub 2020 Jun 18.

Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Sec. 3, Zhongxiao E. Rd., Taipei 10608, Taiwan.

Although several studies have explored green adsorbent synthesized from many types of agriculture waste, this study represents the first attempt to prepare an environmentally friendly rice bran/SnO/FeO-based absorbent with economic viability and material reusability, for the promotion of sustainable development. Here, rice bran/SnO/FeO composites were successfully synthesized and applied for adsorption of reactive blue 4 (RB4) and crystal violet (CV) dyes in aqueous solutions. The adsorption data were well-fitted by the Langmuir isotherm model and the pseudo-second-order kinetic model. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122764DOI Listing

Improved Fracture Toughness and Conversion Degree of Resin-Based Dental Composites after Modification with Liquid Rubber.

Materials (Basel) 2020 Jun 14;13(12). Epub 2020 Jun 14.

Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodźki 1, 20-093 Lublin, Poland.

There are many methods widely applied in the engineering of biomaterials to improve the mechanical properties of the dental composites. The aim of this study was to assess the effect of modification of dental composites with liquid rubber on their mechanical properties, degree of conversion, viscosity, and cytotoxicity. Both flow and packable composite consisted of a mixture of Bis-GMA, TEGDMA, UDMA, and EBADMA resins reinforced with 60 and 78 wt. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122704DOI Listing

The Influence of Laser Surface Remelting on the Tribological Behavior of the ECAP-Processed AZ61 Mg Alloy and AZ61-AlO Metal Matrix Composite.

Materials (Basel) 2020 Jun 12;13(12). Epub 2020 Jun 12.

Department of Mechanical Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Taipei 10607, Taiwan.

This paper deals with the tribological study of the laser remelted surfaces of the ECAP-processed AZ61 magnesium alloy and AZ61-AlO metal matrix composite with 10 wt.% addition of AlO nanoparticles. The study included the experimental optimization of the laser surface remelting conditions for the investigated materials by employing a 400 W continual wave fiber laser source. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122688DOI Listing

Rivet-Inspired Modification of Aramid Fiber by Decorating with Silica Particles to Enhance the Interfacial Interaction and Mechanical Properties of Rubber Composites.

Materials (Basel) 2020 Jun 11;13(11). Epub 2020 Jun 11.

Department of Polymer Material and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.

A rivet-inspired method of decorating aramid fiber (AF) with silica particles (SiO) is proposed to produce SiO@AF hybrid materials that have largely enhanced interfacial interaction with the rubber matrix. AF was firstly surface-modified with polyacrylic acid (PAA) to obtain PAA-AF, and SiO was silanized with 3-aminopropyltriethoxysilane to obtain APES-SiO. Then, SiO@AF was prepared by chemically bonding APES-SiO onto the surface of PAA-AF in the presence of dicyclohexylcarbodiimide (DCC) and 4-dimethylaminopyridine (DMAP). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13112665DOI Listing

Polycaprolactone/Gelatin/Hyaluronic Acid Electrospun Scaffolds to Mimic Glioblastoma Extracellular Matrix.

Materials (Basel) 2020 Jun 11;13(11). Epub 2020 Jun 11.

Center for Nanotechnology & Biomaterials Application and Research, Marmara University, 34722 Istanbul, Turkey.

Glioblastoma (GBM), one of the most malignant types of human brain tumor, is resistant to conventional treatments and is associated with poor survival. Since the 3D extracellular matrix (ECM) of GBM microenvironment plays a significant role on the tumor behavior, the engineering of the ECM will help us to get more information on the tumor behavior and to define novel therapeutic strategies. In this study, polycaprolactone (PCL)/gelatin(Gel)/hyaluronic acid(HA) composite scaffolds with aligned and randomly oriented nanofibers were successfully fabricated by electrospinning for mimicking the extracellular matrix of GBM tumor. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13112661DOI Listing

Correlation Between the Indentation Properties and Microstructure of Dissimilar Capacitor Discharge Welded WC-Co/High-Speed Steel Joints.

Materials (Basel) 2020 Jun 11;13(11). Epub 2020 Jun 11.

High Strength Materials Group, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Ibaraki, Japan.

The welding of cemented carbide to tool steel is a challenging task, of scientific and industrial relevance, as it combines the high level of hardness of cemented carbide with the high level of fracture toughness of steel, while reducing the shaping cost and extending the application versatility, as its tribological, toughness, thermal and chemical properties can be optimally harmonised. The already existing joining technologies often impart either insufficient toughness or poor high-temperature strength to a joint to withstand the ever-increasing severe service condition demands. In this paper, a novel capacitor discharge welding (CDW) process is investigated for the case of a butt-joint between a tungsten carbide-cobalt (WC-Co) composite rod and an AISI M35 high-speed steel (HSS) rod. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13112657DOI Listing

Comparison of the Influence of 45S5 and Cu-Containing 45S5 Bioactive Glass (BG) on the Biological Properties of Novel Polyhydroxyalkanoate (PHA)/BG Composites.

Materials (Basel) 2020 Jun 8;13(11). Epub 2020 Jun 8.

Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany.

Polyhydroxyalkanoates (PHAs), due to their biodegradable and biocompatible nature and their ability to be formed in complex structures, are excellent candidates for fabricating scaffolds used in tissue engineering. By introducing inorganic compounds, such as bioactive glasses (BGs), the bioactive properties of PHAs can be further improved. In addition to their outstanding bioactivity, BGs can be additionally doped with biological ions, which in turn extend the functionality of the BG-PHA composite. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13112607DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7321580PMC

Experimental Investigation on the In-Plane Creep Behavior of a Carbon-Fiber Sheet Molding Compound at Elevated Temperature at Different Stress States.

Materials (Basel) 2020 Jun 3;13(11). Epub 2020 Jun 3.

IVW-Institute for Composite Materials GmbH, Component Development, 67663 Kaiserslautern, Germany.

The creepage behavior of one thermosetting carbon fiber sheet molding compound (SMC) material was studied applying in-plane loading at 120 °C. Loads were applied in bending, tension and compression test setups at the same in-plane stress level of 47 MPa. Different creep strain rates were determined. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13112545DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7321483PMC

Surface Characteristics and Color Stability of Gingiva-Colored Resin Composites.

Materials (Basel) 2020 Jun 3;13(11). Epub 2020 Jun 3.

Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece.

The purpose of this study was to investigate the surface characteristics and color stability of gingiva-colored composite restorative materials (Anaxgum-ANG, Ceramage-CMG and Gradia Gum-GRG). The microstructure, composition, degree of conversion (DC %) and 3D roughness (Sa, Sz, Sdr, Sc) were examined by LV-SEM/EDS, ATR-FTIR and optical profilometry, respectively. For the color stability (CIE L*, a*, b* system) and hardness (HV), measurements were performed at baseline and after 30 days storage in distilled water, coffee and red wine. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13112540DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7321486PMC

Recent Advances in Applications of Cellulose Derivatives-Based Composite Membranes with Hydroxyapatite.

Materials (Basel) 2020 May 29;13(11). Epub 2020 May 29.

Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania.

The development of novel polymeric composites based on cellulose derivatives and hydroxyapatite represents a fascinating and challenging research topic in membranes science and technology. Cellulose-based materials are a viable alternative to synthetic polymers due to their favorable physico-chemical and biological characteristics. They are also an appropriate organic matrix for the incorporation of hydroxyapatite particles, inter and intramolecular hydrogen bonds, as well as electrostatic interactions being formed between the functional groups on the polymeric chains surface and the inorganic filler. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13112481DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7321373PMC

Cellular Nickel-Yttria/Zirconia (Ni-YSZ) Cermet Foams: Manufacturing, Microstructure and Properties.

Materials (Basel) 2020 May 26;13(11). Epub 2020 May 26.

Institute for Materials and Joining Technology-Nonmetallic Inorganic Materials and Composites, Otto-von-Guericke-University Magdeburg, Große Steinernetischstraße 6, 39104 Magdeburg, Germany.

Open-celled ceramic composite foams were prepared from NiO and yttria-stabilized zirconia (YSZ) powders by the polymer sponge replication (Schwartzwalder) technique using the respective aqueous dispersions. Mechanically stable NiO-YSZ foams with an average porosity of 93 vol.% were obtained. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13112437DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7321227PMC

Progressive Failure Analysis of Laminates with Embedded Wrinkle Defects Based on an Elastoplastic Damage Model.

Materials (Basel) 2020 May 25;13(10). Epub 2020 May 25.

MOE Key Laboratory of Disaster Forecast and Control in Engineering, School of Mechanics and Construction Engineering, Jinan University, Guangzhou 510632, China.

Out-of-plane wrinkling has a significant influence on the mechanical performance of composite laminates. Numerical simulations were conducted to investigate the progressive failure behavior of fiber-reinforced composite laminates with out-of-plane wrinkle defects subjected to axial compression. To describe the material degradation, a three-dimensional elastoplastic damage model with four damage modes (i. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13102422DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7288345PMC

Fatigue Behavior of PBO FRCM Composite Applied to Concrete Substrate.

Materials (Basel) 2020 May 21;13(10). Epub 2020 May 21.

Department of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, 20133 Milan, Italy.

Several reinforced-concrete (RC) structural elements are subjected to cyclic load, such those employed in highway and railroad bridges and viaducts. The durability of these elements may be reduced as a consequence of fatigue, which mainly affects the steel reinforcement. The use of externally bonded (EB) fiber-reinforced cementitious matrix (FRCM) composites allows the moment capacity to be shared by the internal reinforcement and the EB composite, thus increasing the fatigue life of the strengthened RC member. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13102368DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7287857PMC

Cortical cell stiffness is independent of substrate mechanics.

Nat Mater 2020 May 25. Epub 2020 May 25.

Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK.

Cortical stiffness is an important cellular property that changes during migration, adhesion and growth. Previous atomic force microscopy (AFM) indentation measurements of cells cultured on deformable substrates have suggested that cells adapt their stiffness to that of their surroundings. Here we show that the force applied by AFM to a cell results in a significant deformation of the underlying substrate if this substrate is softer than the cell. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1038/s41563-020-0684-xDOI Listing

Manufacturing ZrB-SiC-TaC Composite: Potential Application for Aircraft Wing Assessed by Frequency Analysis through Finite Element Model.

Materials (Basel) 2020 May 12;13(10). Epub 2020 May 12.

Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Korea.

This study presents a new ultra-high temperature composite fabricated by using zirconium diboride (ZrB), silicon carbide (SiC), and tantalum carbide (TaC) with the volume ratios of 70%, 20%, and 10%, respectively. To attain this novel composite, an advanced processing technique of spark plasma sintering (SPS) was applied to produce ZrB-SiC-TaC. The SPS manufacturing process was achieved under pressure of 30 MPa, at 2000 °C for 5 min. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13102213DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7288086PMC

Detection and Imaging of Debonding in Adhesive Joints of Concrete Beams Strengthened with Steel Plates Using Guided Waves and Weighted Root Mean Square.

Materials (Basel) 2020 May 8;13(9). Epub 2020 May 8.

Department of Mechanics of Materials and Structures, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland.

Strengthening of engineering structures is an important issue, especially for elements subjected to variable loads. In the case of concrete beams or slabs, one of the most popular approaches assumes mounting an external reinforcement in the form of steel or composite elements by structural adhesives. A significant disadvantage of adhesive joints is the lack of access to the adhesive film for visual condition assessment, thus, there is a need for non-destructive diagnostics of these kinds of connections. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13092167DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254412PMC

Nano-Indentation Properties of Tungsten Carbide-Cobalt Composites as a Function of Tungsten Carbide Crystal Orientation.

Materials (Basel) 2020 May 5;13(9). Epub 2020 May 5.

High Strength Materials Group, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Ibaraki Tsukuba 305-0047, Japan.

Tungsten carbide-cobalt (WC-Co) composites are a class of advanced materials that have unique properties, such as wear resistance, hardness, strength, fracture-toughness and both high temperature and chemical stability. It is well known that the local indentation properties (i.e. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13092137DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254261PMC

Experimental Studies of Concrete-Filled Composite Tubes under Axial Short- and Long-Term Loads.

Materials (Basel) 2020 May 1;13(9). Epub 2020 May 1.

Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-724 Olsztyn, Poland.

The paper presents experimental studies on axially compressed columns made of concrete-filled glass fiber reinforced polymer (GFRP) tubes. The infill concrete was C30/37 according to Eurocode 2. The investigated composite pipes were characterized by different angles of fiber winding in relation to the longitudinal axis of the element: 20, 55 and 85 degrees. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13092080DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254371PMC

Hierarchical Composite Meshes of Electrospun PS Microfibers with PA6 Nanofibers for Regenerative Medicine.

Materials (Basel) 2020 Apr 23;13(8). Epub 2020 Apr 23.

International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, 30-059 Cracow, Poland.

One of the most frequently applied polymers in regenerative medicine is polystyrene (PS), which is commonly used as a flat surface and requires surface modifications for cell culture study. Here, hierarchical composite meshes were fabricated via electrospinning PS with nylon 6 (PA6) to obtain enhanced cell proliferation, development, and integration with nondegradable polymer fibers. The biomimetic approach of designed meshes was verified with a scanning electron microscope (SEM) and MTS assay up to 7 days of cell culture. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13081974DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7216289PMC

Effect of the Morphology of Tungsten Oxide Embedded in Sodium Alginate/Polyvinylpyrrolidone Composite Beads on the Photocatalytic Degradation of Methylene Blue Dye Solution.

Materials (Basel) 2020 Apr 17;13(8). Epub 2020 Apr 17.

Center of Physics and Engineering of Advanced Materials (CeFEMA), Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal.

Tungsten oxide nanostructures were modified by oxygen vacancies through hydrothermal treatment. Both the crystalline structure and morphological appearance were completely changed. Spherical WO·HO was prepared from tungstic acid solution by aging at room temperature, while rod-like WO·0. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13081905DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7216279PMC

Nonconventional Ca(OH) Treatment of Bamboo for the Reinforcement of Cement Composites.

Materials (Basel) 2020 Apr 17;13(8). Epub 2020 Apr 17.

School of Energy, Construction and Environment, Built & Natural Environment Research Centre, Coventry University, Priory Street, Coventry CV15FB, UK.

This study compares the structural and morphological changes in Kunth (GAK) fiber prepared in three different ways (chips, barkless and crushed) when non-conventional alkaline treatment is applied. Moreover, it shows the improvement of mechanical properties of cement composites reinforced with these treated fibers. The three different preparations of were treated with a saturated solution of calcium hydroxide (5%) at 125 °C and 1. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13081892DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7215494PMC

Seismic Performance of Bridge Piers Constructed with PP-ECC at Potential Plastic Hinge Regions.

Materials (Basel) 2020 Apr 16;13(8). Epub 2020 Apr 16.

Department of Civil & Environmental Engineering, Washington State University, Pullman, WA 99164, USA.

This work presents an experimental investigation on the seismic performance of bridge piers constructed with polypropylene fiber reinforced engineered cementitious composite (PP-ECC) at potential plastic hinge regions. Eight solid square bridge piers are tested under a combination of reversed cyclic lateral loading and constant axial vertical loading. The test variables include the reinforcement stirrup ratio (0 vol. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13081865DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7215443PMC

Application of Electrically Conducting Nanocomposite Material Polythiophene@NiO/Frt/GOx as Anode for Enzymatic Biofuel Cells.

Materials (Basel) 2020 Apr 12;13(8). Epub 2020 Apr 12.

Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.

In this work, nano-inspired nickel oxide nanoparticles (NiO) and polythiophene (Pth) modified bioanode was prepared for biofuel cell applications. The chemically prepared nickel oxide nanoparticles and its composite with polythiophene were characterized for elemental composition and microscopic characterization while using scanning electron microscopy. The electrochemical characterizations of polythiophene@NiO composite, biocompatible mediator ferritin (Frt) and glucose oxidase (GOx) catalyst modified glassy carbon (GC) electrode were carried out using cyclic voltammetry (CV), linear sweep voltammetry (LSV), and charge-discharge studies. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13081823DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7215782PMC

Glass/Au Composite Membranes with Gold Nanoparticles Synthesized inside Pores for Selective Ion Transport.

Materials (Basel) 2020 Apr 9;13(7). Epub 2020 Apr 9.

Grebenshchikov Institute of Silicate Chemistry (ISCh) RAS, 2 Adm. Makarova emb., St Petersburg 199155, Russia.

Nanocomposite membranes have been actively developed in the last decade. The involvement of nanostructures can improve the permeability, selectivity, and anti-fouling properties of a membrane for improved filtration processes. In this work, we propose a novel type of ion-selective Glass/Au composite membrane based on porous glass (PG), which combines the advantages of porous media and promising selective properties. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13071767DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7178654PMC

Carbon Gels-Modified TiO: Promising Materials for Photocatalysis Applications.

Materials (Basel) 2020 Apr 8;13(7). Epub 2020 Apr 8.

Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Carbon gels are a kind of porous organic polymer, which play pivotal roles in electrode, supercapacitor, hydrogen storage, and catalysis. Carbon gels are commonly prepared by the condensation of resorcinol and formaldehyde. The as-prepared polymers are further aged and sintered at a high temperature in an inert atmosphere to form cross-linked and intertwined porous structures. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13071734DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7178632PMC

Chitosan/Graphene Oxide Nanocomposite Membranes as Adsorbents with Applications in Water Purification.

Materials (Basel) 2020 Apr 4;13(7). Epub 2020 Apr 4.

Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Eroii Sanitari St 8, 050474 Bucharest, Romania.

The scope of this article is to develop composite membranes using chitosan (CS) and graphene oxide (GO) as adsorbents for the removal of inorganic pollutants such as heavy metal ions, particularly Pb, from aqueous solutions. GO was obtained by modified Hummers method and blended with CS solution. The introduction of ethylenediaminetetraacetic acid (EDTA) compound to CS/GO suspension lead to an increased adsorption capacity of CS/GO for the elimination of heavy metals by forming stable chelates with them. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13071687DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7178673PMC

Scratch Testing of AlSi12/SiC Composite Layer with High Share of Reinforcing Phase Formed in the Centrifugal Casting Process.

Materials (Basel) 2020 Apr 4;13(7). Epub 2020 Apr 4.

Department of Foundry and Welding, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland.

The scratch test enables assessing the susceptibility of a material to the development of scratches and, being in some ways a measure of its abrasion resistance, allows extended knowledge in the field of material application usability, especially its machining capabilities. The aim of the study was to assess the resistance of a centrifugally formed AlSi12/SiC composite layer with a high share of reinforcing phase (V > 40%) to scratching with a diamond indenter. The microstructure and effect of the load applied to the diamond indenter on the scratch depth and susceptibility of the composite layer to the nucleation and propagation of cracks in hard and brittle SiC particles were analyzed. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13071685DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7178687PMC

Hybrid TiO-Polyaniline Photocatalysts and their Application in Building Gypsum Plasters.

Materials (Basel) 2020 Mar 26;13(7). Epub 2020 Mar 26.

Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdansk University of Technology, 80-232 Gdansk, Poland.

Hybrid materials of conjugated polymer and titanium(IV) oxide have attracted considerable attention concerning their potential benefits, including (i) efficient exploitation of visible light, (ii) a high adsorption capacity for organic contaminants, (iii) and effective charge carriers separation. The new class of the photocatalysts is promising for the removal of environmental pollutants in both aqueous and gaseous phases. For the first time, in this study, the polyaniline (PANI)-TiO hybrid composite was used for the degradation of phenol in water and toluene in the gas phase. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13071516DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7177723PMC

Cyclic-Dependent Damage Evolution in Self-Healing Woven SiC/[Si-B-C] Ceramic-Matrix Composites at Elevated Temperatures.

Materials (Basel) 2020 Mar 24;13(6). Epub 2020 Mar 24.

Université de Lyon, INSA-Lyon, MATEIS (UMR CNRS 5510), 7 Avenue Jean Capelle, 69621 Villeurbanne Cedex, France.

Cycle-dependent damage evolution in self-healing, 2.5D woven Hi-Nicalon SiC/[Si-B-C] and 2D woven Hi-Nicalon SiC/[SiC-BC] ceramic-matrix composites (CMCs) at 600 and 1200 °C was investigated. The cycle-dependent damage parameters of internal friction, dissipated energy, Kachanov's damage parameter, and broken fiber fraction were obtained to describe damage development in self-healing CMCs. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13061478DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143090PMC

Selected Tribological Properties and Vibrations in the Base Resonance Zone of the Polymer Composite Used in the Aviation Industry.

Materials (Basel) 2020 Mar 18;13(6). Epub 2020 Mar 18.

Department of Airframe and Engine, Military University of Aviation, 80-521 Dęblin, Poland.

The revolution in the global market of composite materials is evidenced by their increasing use in such segments as the transport, aviation, and wind industries. The innovative aspect of this research is the methodology approach, based on the simultaneous analysis of mechanical and tribological loads of composite materials, which are intended for practical use in the construction of aviation parts. Simultaneously, the methodology allows the composition of the composites used in aviation to be optimized. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13061364DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7142479PMC

Stiffness Estimates for Composites with Elliptic Cylindrical Voids.

Materials (Basel) 2020 Mar 17;13(6). Epub 2020 Mar 17.

Institute for Plastics Processing, Fakultät für Maschinenwesen, RWTH Aachen University, Seffenter Weg 201, 52074 Aachen, Germany.

A two-step homogenization procedure is presented to investigate the stiffness of a unidirectional continuous fiber-reinforced composite material containing voids of different shapes and volume contents. Since the Mori-Tanaka scheme is limited to moderate volume contents of the inhomogeneity phase, fiber and matrix are homogenized with semi-empirical relations with use of the adjusted fiber volume content in a first step. In the second step, the Mori-Tanaka scheme is applied to obtain the homogenized stiffness tensor of a transversely isotropic material containing voids aligned with the fiber direction. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13061354DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143308PMC

Effect of Single-walled Carbon Nanotubes on Strength Properties of Cement Composites.

Materials (Basel) 2020 Mar 13;13(6). Epub 2020 Mar 13.

School of Civil, Structural & Environmental Engineering, University College Dublin, D04 V1W8, Dublin 04, Ireland.

This study aimed to investigate the effects of single-walled carbon nanotubes (SWCNTs) on strength the properties of cement composites when surfactant (SAA) was applied as the dispersion method. TritonX-100 (TX10) was used as the SAA to pretreat SWCNTs, which has been proved to perform well in dispersing the agglomerates of SWCNTs. In this study, four different concentration of SWCNTs, namely 0. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13061305DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143362PMC

A Peridynamics-Based Micromechanical Modeling Approach for Random Heterogeneous Structural Materials.

Materials (Basel) 2020 Mar 13;13(6). Epub 2020 Mar 13.

Civil and Environmental Engineering, University of Rhode Island, Kingston, RI 02881, USA.

This paper presents a peridynamics-based micromechanical analysis framework that can efficiently handle material failure for random heterogeneous structural materials. In contrast to conventional continuum-based approaches, this method can handle discontinuities such as fracture without requiring supplemental mathematical relations. The framework presented here generates representative unit cells based on microstructural information on the material and assigns distinct material behavior to the constituent phases in the random heterogenous microstructures. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13061298DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143128PMC

An Analytical Mini-Review on the Compression Strength of Rubberized Concrete as a Function of the Amount of Recycled Tires Crumb Rubber.

Materials (Basel) 2020 Mar 9;13(5). Epub 2020 Mar 9.

Polytechnic of Torino, Department of Applied Science and Technology DISAT, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.

Since waste tires constitute a serious environmental concern, several studies are devoted to the use of finely divided recycled rubber for the production of rubberized concrete by partial substitution of the mineral aggregate fraction. The introduction of rubber into concrete presents several advantages (e.g. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13051234DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7085035PMC

Effect of PBO-FRCM Reinforcement on Stiffness of Eccentrically Compressed Reinforced Concrete Columns.

Materials (Basel) 2020 Mar 9;13(5). Epub 2020 Mar 9.

Faculty of Civil Engineering, Wroclaw University of Science and Technology, Pl. Grunwaldzki 11, 50-377 Wroclaw, Poland.

This paper examines the effect of PBO (P-phenylene benzobisoxazole)-FRCM (Fabric Reinforced Cementitious Matrix) reinforcement on the stiffness of eccentrically compressed reinforced concrete columns. Reinforcement with FRCM consists of bonding composite meshes to the concrete substrate by means of mineral mortar. Longitudinal and/or transverse reinforcements made of PBO (P-phenylene benzobisoxazole) mesh were applied to the analyzed column specimens. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13051221DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7085082PMC

Numerical Study on the Variability of Plastic CTOD.

Materials (Basel) 2020 Mar 11;13(6). Epub 2020 Mar 11.

Centre for Mechanical Engineering, Department of Mechanical Engineering, Materials and Processes (CEMMPRE), University of Coimbra, 3030-788 Coimbra, Portugal.

This paper presents a numerical study on the influence of material parameters and loading variability in the plastic crack tip opening displacement (CTOD) results. For this purpose, AA7050-T6 was selected as reference material and a middle-cracked tension specimen geometry was considered. The studied input parameters were the Young's modulus, Poisson's ratio, isotropic and kinematic hardening parameters and the maximum and minimum applied loads. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13061276DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143349PMC

Devulcanization Technologies for Recycling of Tire-Derived Rubber: A Review.

Materials (Basel) 2020 Mar 10;13(5). Epub 2020 Mar 10.

University of Applied Sciences FH Technikum Wien, A-1200 Vienna, Austria.

In general, composite materials are difficult to recycle. Tires belong to this class of materials. On top, one of their main constitutents, vulcanized rubber, is as elastomer, which cannot be remolten and hence is particularly challenging to put to a new use. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13051246DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7085078PMC

Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature.

Materials (Basel) 2020 Feb 24;13(4). Epub 2020 Feb 24.

Center of Excellence Geopolymer and Green Technology, School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, 01000 Kangar, Perlis, Malaysia.

A geopolymer has been reckoned as a rising technology with huge potential for application across the globe. Dolomite refers to a material that can be used raw in producing geopolymers. Nevertheless, dolomite has slow strength development due to its low reactivity as a geopolymer. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13041015DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7079652PMC
February 2020

The Heat Conductivity Properties of Hemp-Lime Composite Material Used in Single-Family Buildings.

Materials (Basel) 2020 Feb 24;13(4). Epub 2020 Feb 24.

Department of Mechanics and Machine Design, Faculty of Mechanical Engineering, Opole University of Technology, Ulica Prószkowska 76, 45-758 Opole, Poland.

The main goal of the paper is to calculate the heat conductivity for three experimental hemp-lime composites used for structural construction purposes with the use of the experimental stand inside two compartments. Due to current construction trends, we are constantly searching for eco-friendly materials that have a low carbon footprint. This is the case of the analyzed material, and additional thermographic heat distribution inside the material during a fire resistance test proves that it is also a perfect insulation material, which could be applied in addition of popular isolating materials. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13041011DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7079651PMC
February 2020

High Temperature Sensing and Detection for Cementitious Materials Using Manganese Violet Pigment.

Materials (Basel) 2020 Feb 22;13(4). Epub 2020 Feb 22.

Department of Civil Engineering, Inha University, Incheon 22212, Korea.

In recent years, advanced materials have attracted considerable interest in the field of temperature detection and sensing. This study examined the thermochromic properties of inorganic manganese violet (MV) with increasing temperature. According to the thermochromic test, the material was found to have reversible and irreversible color change properties. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13040993DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7078599PMC
February 2020

Synthesis of Silver-Coated Bioactive Nanocomposite Scaffolds Based on Grafted Beta-Glucan/Hydroxyapatite via Freeze-Drying Method: Anti-Microbial and Biocompatibility Evaluation for Bone Tissue Engineering.

Materials (Basel) 2020 Feb 21;13(4). Epub 2020 Feb 21.

Department of Biology, University of Hafr Al Batin, Hafar Al-batin 39524, Saudi Arabia.

Advancement and development in bone tissue engineering, particularly that of composite scaffolds, are of great importance for bone tissue engineering. We have synthesized polymeric matrix using biopolymer (β-glucan), acrylic acid, and nano-hydroxyapatite through free radical polymerization method. Bioactive nanocomposite scaffolds (BNSs) were fabricated using the freeze-drying method and Ag was coated by the dip-coating method. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13040971DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7078890PMC
February 2020

Experimental Studies of Microchannel Tapering on Droplet Forming Acceleration in Liquid Paraffin/Ethanol Coaxial Flows.

Materials (Basel) 2020 Feb 20;13(4). Epub 2020 Feb 20.

Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China.

The formations of micro-droplets are strongly influenced by the local geometries where they are generated. In this paper, through experimental research, we focus on the roles of microchannel tapering in the liquid paraffin/ethanol coaxial flows in their flow patterns, flow regimes, and droplet parameters, i.e. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13040944DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7078719PMC
February 2020

Ni/cerium Molybdenum Oxide Hydrate Microflakes Composite Coatings Electrodeposited From Choline Chloride: Ethylene Glycol Deep Eutectic Solvent.

Materials (Basel) 2020 Feb 19;13(4). Epub 2020 Feb 19.

Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, 50-370 Wrocław, Poland.

Cerium molybdenum oxide hydrate microflakes are codeposited with nickel from a deep eutectic solvent-based bath. During seven days of exposure in 0.05 M NaCl solution, the corrosion resistance of composite coating (Ni/CeMoOxide) is slightly reduced, due to the existence of some microcracks caused by large microflakes. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13040924DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7078612PMC
February 2020

On the Directivity of Lamb Waves Generated by Wedge PZT Actuator in Thin CFRP Panel.

Materials (Basel) 2020 Feb 18;13(4). Epub 2020 Feb 18.

Institute of Mechanics and Applied Mathematics, Southern Federal University, Rostov-on-Don 344006, Russia.

This paper addresses investigation of guided-wave excitation by angle-beam wedge piezoelectric (PZT) transducers in multilayered composite plate structure with orthotropic symmetry of the material. The aim of the present study is to determine the capability of such actuators to provide the controlled generation of an acoustic wave of a desirable type with the necessary wavelength, propagation distance and directivity. The studied CFRP (Carbon Fiber Reinforced Plastic) panel is considered to be homogenous, with effective elastic moduli and anisotropic structural damping, whose parameters were determined experimentally. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13040907DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7079623PMC
February 2020