8,685 results match your criteria liquids high

"Giant" Nitrogen Uptake in Ionic Liquids Confined in Carbon Pores.

J Am Chem Soc 2021 Jun 15. Epub 2021 Jun 15.

Department of Colloid Chemistry, Research Campus Golm, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany.

Ionic liquids are well known for their high gas absorption capacity. It is shown that this is not a solvent constant, but can be enhanced by another factor of 10 by pore confinement, here of the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate (EmimOAc) in the pores of carbon materials. A matrix of four different carbon compounds with micro- and mesopores as well as with and without nitrogen doping is utilized to investigate the influence of the carbons structure on the nitrogen uptake in the pore-confined EmimOAc. Read More

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Type 3 porous liquids based on non-ionic liquid phases - a broad and tailorable platform of selective, fluid gas sorbents.

Chem Sci 2020 Jan 9;11(8):2077-2084. Epub 2020 Jan 9.

School of Chemistry and Chemical Engineering, Queen's University Belfast David Keir Building Stranmillis Road Belfast BT9 5AG UK

We describe a series of Type 3 porous liquids, denoted "T3PLs", based on a wide range of microporous solids including MOFs, zeolites and a porous organic polymer (PAF-1). These solids are dispersed in various non-ionic liquid phases (including silicone oils, triglyceride oils, and polyethylene glycols) which have a range of structures and properties, and that are in many cases sterically excluded from the pores of the solids. Several stable dispersions with high gas uptakes are obtained. Read More

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January 2020

Revisiting the concept of activation in supercooled liquids.

Eur Phys J E Soft Matter 2021 Jun 14;44(6):77. Epub 2021 Jun 14.

Department of Chemistry, Columbia University, New York, NY, 10027, USA.

In this work, we revisit the description of dynamics based on the concepts of metabasins and activation in mildly supercooled liquids via the analysis of the dynamics of a paradigmatic glass former between its onset temperature [Formula: see text] and mode-coupling temperature [Formula: see text]. First, we provide measures that demonstrate that the onset of glassiness is indeed connected to the landscape, and that metabasin waiting time distributions are so broad that the system can remain stuck in a metabasin for times that exceed [Formula: see text] by orders of magnitude. We then reanalyze the transitions between metabasins, providing several indications that the standard picture of activated dynamics in terms of traps does not hold in this regime. Read More

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ZnO Nanoneedle-Modified PEEK Fiber Felt for Improving Anti-fouling Performance of Oil/Water Separation.

Langmuir 2021 Jun 14. Epub 2021 Jun 14.

National and Local Joint Engineering Laboratory for Synthetic Technology of High Performance Polymer, College of Chemistry, Jilin University, Changchun 130012, China.

Membrane separation has been considered to be the most effective decontamination method for oily waste water. The most significant point of membrane separation is the resistance against membrane fouling. Fabricating hierarchical architectures on the membrane surface is an available approach to improving its anti-fouling property. Read More

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Tribological properties of a series of carbon dots modified by ionic liquids with various anion species: experimental findings and density functional theory calculations.

Dalton Trans 2021 Jun 14. Epub 2021 Jun 14.

College of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, P. R. China.

A series of carbon dots modified by ionic liquids with various anion species (CDs-ILs-X) were facilely synthesized by a one-pot pyrolysis method and subsequent anion exchange processes, where X- represented the anions of hexafluorophosphate (PF6-), bis(trifluorosulfonyl) imide (NTf2-), bis(salicylato) borate (BScB-) and oleate (OL-). Their tribological properties as lubricant additives of polyethylene glycol (PEG200) were investigated under the ball-on-plate reciprocating mode and steel/steel contact. The maximum friction coefficient and wear volume reductions of PEG200 triggered by CDs-ILs-PF6, CDs-ILs-NTf2, CDs-ILs-BScB and CDs-ILs-OL were up to 42. Read More

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An excimer to exciplex transition through realization of donor-acceptor interactions in luminescent solvent-free liquids.

Nanoscale 2021 Jun 14. Epub 2021 Jun 14.

Organic Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune-411008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201 002, India.

Luminescent solvent-free organic liquids are known for their enhanced quantum yield, color tunability, and availability of a matrix for other dopants to generate hybrid luminescent materials with improved features for newer applications. Herein, we report a donor-acceptor based luminescent "exciplex liquid" by utilizing the slightly different electron affinity of the acceptor molecules. A red-shifted broad exciplex emission exhibited by the donor-acceptor pair even at a lower concentration of the acceptor (0. Read More

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Traditional Chinese Medicine Oral Liquids Combined With Azithromycin for Pneumonia in Children: A Bayesian Network Meta-Analysis.

Front Pharmacol 2021 28;12:652412. Epub 2021 May 28.

Evidence-Based Medicine Center, Tianjin University of Traditional Chinese Medicine, Tianjin, China.

pneumonia (MPP) causes flu-like symptoms in children, increasing the burden on the health and education systems. In China, traditional Chinese medicine oral liquids (TCMOLs) combined with azithromycin (TCMOLs + Azithromycin) is commonly used to treat MPP in children. However, TCMOLs with the optimal clinical applicability remain unknown. Read More

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Poly(vinyl alcohol) Hydrogels with Integrated Toughness, Conductivity, and Freezing Tolerance Based on Ionic Liquid/Water Binary Solvent Systems.

ACS Appl Mater Interfaces 2021 Jun 13. Epub 2021 Jun 13.

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Shanghai Stomatological Hospital, Laboratory of Advanced Materials, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China.

In recent years, ionic conductive hydrogels have shown great potential for application in flexible sensors, energy storage devices, and actuators. However, developing facile and effective methods for fabricating such hydrogels remains a great challenge, especially for hydrogels that retain their properties in extreme environmental conditions, such as at subzero temperatures or storage in open-air conditions. Herein, a water-miscible ionic liquid (IL), such as 1-ethyl-3-methylimidazolium acetate (EMImAc), was introduced to form an IL/water binary solvent system for poly(vinyl alcohol) (PVA) to create ionic conductive PVA hydrogels. Read More

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Effects of soil amendments on fractions and stability of soil organic matter in saline-alkaline paddy.

J Environ Manage 2021 Jun 10;294:112993. Epub 2021 Jun 10.

College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China. Electronic address:

Soil amelioration is an effective practice to alleviate the adverse effects of soil salinization. However, increasing the fertility of salt-affected soils has been challenging, particularly in coastal saline-alkaline paddy soils. Here, we carried out a 45-day incubation experiment to evaluate the impacts of soil amendments on fractions and stability of soil organic matter (SOM) in a saline-alkaline paddy. Read More

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Effect of the rheological properties of the liquid carrier on the in vitro swallowing of Solid Oral Dosage Forms.

J Texture Stud 2021 Jun 12. Epub 2021 Jun 12.

INRAE, AgroParisTech, UMR SayFood, Université Paris Saclay, Massy, France.

Solid Oral Dosage Forms (SODF) are the most popular oral drug delivery forms, but they can be difficult to swallow, especially for patients suffering from swallowing disorders. This study investigated the dynamics of different combinations of liquid carriers and SODF during the oral phase of swallowing using an in vitro model. The rheological properties of the carriers were characterized using shear and extensional rheometry, and their effect on bolus velocity, bolus shape, post-swallow residues, and SODF position within the bolus was evaluated. Read More

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Poly(ionic liquid)s Containing Alkoxy Chains and Bis(trifluoromethanesulfonyl)imide Anions as Highly Adhesive Materials.

Adv Mater 2021 Jun 12:e2100962. Epub 2021 Jun 12.

College of Materials Science and Engineering, Hunan University, Changsha, 410004, China.

Adhesive materials have wide applications in diverse fields, but the development of a novel and multipurpose adhesive is a great challenge. This study demonstrates that conventional poly(ionic liquid)s (PILs) can be designed as highly efficient adhesives by simply introducing alkoxy moieties into the cationic backbone of PILs containing bis(trifluoromethanesulfonimide) (TFSI ) anions. The incorporated flexible alkoxy chain not only reduces the glass transition temperature of PILs but also endows these materials with strong hydrogen bonding interactions, which, together with the unique electrostatic interaction of the PILs, simultaneously contributes to a high cohesive energy and interfacial adhesive energy. Read More

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Giant phonon anomalies in the proximate Kitaev quantum spin liquid α-RuCl.

Nat Commun 2021 Jun 10;12(1):3513. Epub 2021 Jun 10.

Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.

The Kitaev quantum spin liquid epitomizes an entangled topological state, for which two flavors of fractionalized low-energy excitations are predicted: the itinerant Majorana fermion and the Z gauge flux. It was proposed recently that fingerprints of fractional excitations are encoded in the phonon spectra of Kitaev quantum spin liquids through a novel fractional-excitation-phonon coupling. Here, we detect anomalous phonon effects in α-RuCl using inelastic X-ray scattering with meV resolution. Read More

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Effect of Photo-Excitation on Contact Electrification at Liquid-Solid Interface.

ACS Nano 2021 Jun 8. Epub 2021 Jun 8.

CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P.R. China.

Liquid-solid triboelectric nanogenerator (L-S TENG) is one of the major techniques to collect energy from tiny liquids, while the saturated charge density at the L-S interface is the key element to decide its performance. Here, we found that the saturated charge density of L-S contact electrification (CE) can be further increased under the illumination of an ultraviolet (UV) light. The fluorine-containing polymers and SiO are chosen as the electrification materials and with and without UV illumination on the L-S TENG. Read More

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Multifunctional Textiles Based on Three-Dimensional Hierarchically Structured TiO Nanowires.

ACS Appl Mater Interfaces 2021 Jun 8. Epub 2021 Jun 8.

School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.

The development of three-dimensional (3D) micro-/nanostructures with multiscale hierarchy offers new potential for the improvement of the pristine textile properties. In this work, a polyester fabric coated with 3D hierarchically structured rutile TiO nanowires (THNWP) was fabricated by a facile hydrothermal strategy. The THNWP samples exhibit markedly improved photocatalytic activities and antibacterial properties owing to their 3D hierarchical architecture constructed by one-dimensional nanowire structures, good crystallinity, excellent light-harvesting capability, and fast electron-transfer rate. Read More

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Propagation and Entrapment of Hydrocarbons in Porous Media under Capillarity Controlled Phase-Alteration Conditions: A Visual Microfluidics Analysis.

ACS Appl Mater Interfaces 2021 Jun 7. Epub 2021 Jun 7.

7-203 Donadeo Innovation Centre for Engineering, University of Alberta, 9211-116 Street NW, Edmonton, Alberta T6G 1H9, Canada.

The displacement characteristics of gas-liquid systems in capillary media under nonisothermal and nonisobaric conditions are controlled by capillarity as phase alteration (specifically vaporization) starts earlier in smaller (nano)capillaries compared to the larger ones. For an accurate modeling of these types of natural and engineered processes, this thermodynamically dictated displacement process should be well understood. With this aim, the capillarity effect on phase change and the displacement dynamics of hydrocarbon liquids in homogeneous and heterogenous silicate microfluidics chips was studied. Read More

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Magnetic field-mediated Janus particles with sustained driving capability for severe bleeding control in perforating and inflected wounds.

Bioact Mater 2021 Dec 18;6(12):4625-4639. Epub 2021 May 18.

State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, 400715, China.

Severe bleeding in perforating and inflected wounds with forky cavities or fine voids encountered during prehospital treatments and surgical procedures is a complex challenge. Therefore, we present a novel hemostatic strategy based on magnetic field-mediated guidance. The biphasic Janus magnetic particle ([email protected]) comprised aggregates of α-FeO nanoparticles (FeO NPs) as the motion actuator, negatively modified microporous starch (MSS) as the base hemostatic substrate, and thrombin as the loaded hemostatic drug. Read More

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December 2021

Enzymatic synthesis of amphiphilic carbohydrate esters: Influence of physicochemical and biochemical parameters.

Biotechnol Rep (Amst) 2021 Jun 18;30:e00631. Epub 2021 May 18.

Unité Transformations & Agroressources, Univ Artois-UniLasalle, ULR7519, F-62408 Bethune, France.

Glycolipids, carbohydrate fatty esters or sugar esters are amphiphilic molecules containing hydrophilic groups bonded to hydrophobic parent structures. Recently, glycolipids have shown their antimicrobial and antitumor capacities. Their surface activity properties have applications in the food, pharmaceutical and cosmetic industries. Read More

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Micro RNA (miRNA) Differential Expression and Exposure to Crude-Oil-Related Compounds.

Microrna 2021 Jun 4. Epub 2021 Jun 4.

Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genoa, Italy.

This review summarizes studies about miRNA differential regulation related to exposure to crude-oil and 20 different crude-oil chemicals as hydrocarbons, sulphured, nitrogen, and metal-containing compounds. It may be interesting to explore the possibility of using early post-transcriptional regulators as a potential novel exposure-biomarker. Crude-oil has been defined as a highly complex mixture of solids, liquids, and gases. Read More

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Construction of ionic liquid functionalized MXene with extremely high adsorption capacity towards iodine via the combination of mussel-inspired chemistry and Michael addition reaction.

J Colloid Interface Sci 2021 May 20;601:294-304. Epub 2021 May 20.

Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing 100084, PR China. Electronic address:

In this work, a highly efficient adsorbent based on ionic liquid functionalized MXene has been fabricated through the combination of mussel-inspired chemistry and Michael addition reaction. The surface of MXene was first coated with polydopamine (PDA) through self-polymerization of dopamine and the amino groups were introduced on the surface of MXene simultaneously. After that, the ene bond-containing ionic liquid was further immobilized on the surface of MXene-PDA to obtain MXene-PDA-IL. Read More

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Liquid Copolymers as Biodegradable Surgical Sealant.

Adv Healthc Mater 2021 Jun 3:e2100803. Epub 2021 Jun 3.

Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa, 3200003, Israel.

Surgical sealants are widely used to prevent seepage of fluids and liquids, promote hemostasis, and close incisions. Despite the remarkable progress the field of biomaterials has undergone, the clinical uses of surgical sealants are limited because of their short persistence time in vivo, toxicity, and high production costs. Here, the development of two complementary neat (solvent-free) prepolymers, PEG -PLGA-NHS and PEG -NH , that harden upon mixing to yield an elastic biodegradable sealant is presented. Read More

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From crude industrial waste glycerol to biopropene Ru-mediated hydrodeoxygenation in ionic liquids.

Chem Commun (Camb) 2021 Jun 2. Epub 2021 Jun 2.

cMACS, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.

The catalytic conversion of crude glycerol to biopropene was investigated. A bifunctional Ru-ionic liquid system showed a high tolerance for common crude glycerol impurities like water, salts and methanol. After optimizing both dehydration and olefin selectivity, a 82% biopropene yield (94% selectivity) was obtained directly from industrial waste glycerol. Read More

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Percolation and tortuosity in heart-like cells.

Sci Rep 2021 Jun 1;11(1):11441. Epub 2021 Jun 1.

Physics Department, Ben-Gurion University, Beer-Sheva, Israel.

In the last several years, quite a few papers on the joint question of transport, tortuosity and percolation have appeared in the literature, dealing with passage of miscellaneous liquids or electrical currents in different media. However, these methods have not been applied to the passage of action potential in heart fibrosis (HF), which is crucial for problems of heart arrhythmia, especially of atrial tachycardia and fibrillation. In this work we address the HF problem from these aspects. Read More

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Enhancing Pervaporation Membrane Selectivity by Incorporating Star Macromolecules Modified with Ionic Liquid for Intensification of Lactic Acid Dehydration.

Polymers (Basel) 2021 May 31;13(11). Epub 2021 May 31.

Institute of Chemistry, Saint Petersburg State University, 198504 Saint Petersburg, Russia.

Modification of polymer matrix by hybrid fillers is a promising way to produce membranes with excellent separation efficiency due to variations in membrane structure. High-performance membranes for the pervaporation dehydration were produced by modifying poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) to facilitate lactic acid purification. Ionic liquid (IL), heteroarm star macromolecules (HSM), and their combination (IL:HSM) were employed as additives to the polymer matrix. Read More

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Application of Ionic Liquids for Batteries and Supercapacitors.

Materials (Basel) 2021 May 29;14(11). Epub 2021 May 29.

German Aerospace Center (DLR), Department of High-Temperature and Functional Coatings, Institute of Materials Research, 51147 Cologne, Germany.

Nowadays, the rapid development and demand of high-performance, lightweight, low cost, portable/wearable electronic devices in electrical vehicles, aerospace, medical systems, etc., strongly motivates researchers towards advanced electrochemical energy storage (EES) devices and technologies. The electrolyte is also one of the most significant components of EES devices, such as batteries and supercapacitors. Read More

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Viscoelastic Relaxation of Polymerized Ionic Liquid and Lithium Salt Mixtures: Effect of Salt Concentration.

Polymers (Basel) 2021 May 28;13(11). Epub 2021 May 28.

Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.

Polymerized ionic liquids (PILs) doped with lithium salts have recently attracted research interests as the polymer component in lithium-ion batteries because of their high ionic mobilities and lithium-ion transference numbers. To date, although the ion transport mechanism in lithium-doped PILs has been considerably studied, the role of lithium salts on the dynamics of PIL chains remains poorly understood. Herein, we examine the thermal and rheological behaviors of the mixture of poly(1-butyl-3-vinylimidazolium bis(trifluoromethanesulfonyl)imide (PC-TFSI)/lithium TFSI (LiTFSI) in order to clarify the effect of the addition of LiTFSI. Read More

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The New Approach to the Preparation of Polyacrylamide-Based Hydrogels: Initiation of Polymerization of Acrylamide with 1,3-Dimethylimidazolium (Phosphonooxy-)Oligosulphanide under Drying Aqueous Solutions.

Polymers (Basel) 2021 May 30;13(11). Epub 2021 May 30.

Institute of Chemistry and Problems of Sustainable Development, Dmitry Mendeleev University of Chemical Technology of Russia, Moscow 12047, Russia.

The new initiator of the polymerization of acrylamide, leading to the formation of crosslinked polyacrylamide, was discovered. The structure of the synthesized polyacrylamide was characterized by XRD, Н NMR, and С NMR spectroscopy. It was shown that 1,3-dimethylimidazolium (phosphonooxy-)oligosulphanide is able to initiate radical polymerization under drying aqueous solutions of acrylamide, even at room temperature. Read More

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Recording, Storage, and Reproduction of Information on Polyvinyl Chloride Films Using Shape Memory Effects.

Polymers (Basel) 2021 May 30;13(11). Epub 2021 May 30.

Department of Mechanical Engineering, University of South Florida, 4202 E. Fowler Ave. ENG 030, Tampa, FL 33620, USA.

Partial dissolution and plasticization are used for recording, storing, and reproducing information with modified industrial screen-printing equipment and aqueous solutions of colorless organic liquids on small surface area shape memory polymer films. To justify the choice of "ink" and evaluate the effectiveness of using organic liquids as high-speed polymer solvents, the new method for recording hidden information uses the calculation of the solubility parameter, differential scanning calorimetry, and the method of one-sided swelling of films under isometric conditions. Using the example of tactile marking of shrink labels made of polyvinyl chloride, the optimal conditions for recording hidden information on a film are established in terms of the concentration of an aqueous solution of tetrahydrofuran, the contact time, and the processing temperature of the polymer using screen printing equipment. Read More

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Molecular-Level Investigation of Cycloaliphatic Epoxidised Ionic Liquids as a New Generation of Monomers for Versatile Poly(Ionic Liquids).

Polymers (Basel) 2021 May 7;13(9). Epub 2021 May 7.

Ingénierie des Matériaux Polymères, Université de Lyon, CNRS, UMR 5223, INSA Lyon, F-69621 Villeurbanne, France.

Recently, a new generation of polymerised ionic liquids with high thermal stability and good mechanical performances has been designed through novel and versatile cycloaliphatic epoxy-functionalised ionic liquids (CEILs). From these first promising results and unexplored chemical structures in terms of final properties of the PILs, a computational approach based on molecular dynamics simulations has been developed to generate polymer models and predict the thermo-mechanical properties (e.g. Read More

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Sensitivity and Accuracy of Dielectric Measurements of Liquids Significantly Improved by Coupled Capacitive-Dependent Quartz Crystals.

Sensors (Basel) 2021 May 20;21(10). Epub 2021 May 20.

Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška c. 46, 2000 Maribor, Slovenia.

A method to measure complex permittivity of liquids by using a capacitive-dependent quartz crystal and two quartz oscillators for temperature compensation in the frequency range of 4-10 MHz is described. Complex permittivity can be detected with high precision and sensitivity through a small change of capacitance and conductance, because a change in reactance in series with the quartz crystal impacts its resonant oscillation frequency. The temperature compensation in the range below 0. Read More

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A Review on Ionic Liquids-Based Membranes for Middle and High Temperature Polymer Electrolyte Membrane Fuel Cells (PEM FCs).

Int J Mol Sci 2021 May 21;22(11). Epub 2021 May 21.

Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarina Street, 87-100 Toruń, Poland.

Today, the use of polymer electrolyte membranes (PEMs) possessing ionic liquids (ILs) in middle and high temperature polymer electrolyte membrane fuel cells (MT-PEMFCs and HT-PEMFCs) have been increased. ILs are the organic salts, and they are typically liquid at the temperature lower than 100 °C with high conductivity and thermal stability. The membranes containing ILs can conduct protons through the PEMs at elevated temperatures (more than 80 °C), unlike the Nafion-based membranes. Read More

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