JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Heyang Liu,Shichen Zeng,Zhenyang Li,Da Zhang,Xu Liang,Hanze Ma,Jianyu Wang,Qianfeng Pan,Jinyue Wang,Jingqi Fu,Guangwei He,Zhongyi Jiang
Covalent organic framework (COF) materials exhibit considerable potential for membrane separation applications due to their long-range ordered pore structures, tunable pore chemical microenvironments, and excellent thermochemical stability. However, the intrinsic pore sizes of COF materials often exceed the kinetic diameters of target gas molecules, thereby limiting their efficacy in gas separation. In this study, we present a strategy for the functionalization of ionic COF nanosheets using ionic liquids. The immobilization of ionic liquids within the pores and interlayers of ionic COF nanosheets was accomplished through a straightforward physical blending method, which leverages the electrostatic interactions between the abundant charged groups from the ionic COF nanosheets and the ionic liquids. Subsequently, we prepared CO 2 separation membranes with a thickness of less than 100 nm. The resulting COF membranes demonstrated excellent separation performance with a CO 2 permeance of up to 1116 GPU and a CO 2 /N 2 selectivity of 20.3 as well as good stability. This study offers a simple and effective approach for developing high-performance COF membranes for carbon capture.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120674
·
IF 7.2
Meng Cheng,Wenjing Liu,Chenxi Yang,Qian Jia,Ziyang Yang
Developing efficient materials capable of selectively extracting platinum from secondary resources represents a critical step toward addressing the global shortage of platinum resources and environmental concerns. In this study, we report the rational design and successful synthesis of a novel polymer-supported quaternary ammonium ionic liquid (CPR-BDEA) for the selective separation and recovery of platinum (Pt(IV)). CPR-BDEA exhibited an impressive maximum adsorption capacity 411.5 mg/g (pH=4) and maintained excellent selectivity for Pt(IV) even in the competitive multi-ion systems. Its practical applicability was validated by effective Pt(IV) capture from real leaching solutions derived from e-waste and spent automotive catalyst. Furthermore, CPR-BDEA exhibited excellent regenerability and still maintained a high recovery efficiency for Pt(IV) after five cycles. Finally, with the aid of various characterization technologies and density functional theory (DFT), the adsorption mechanism between CPR-BDEA and Pt(IV) was revealed detailly, including electrostatic attraction, hydrogen bonds and van der Waals between the side chain of CPR-BDEA and Pt(IV), ion exchange and other interactions. It is expected that this study would provide fundamental insights into the design and preparation of quaternary ammonium salt functionalized materials and contribute to the development of sustainable strategies for the selective separation of precious metals from secondary resources.
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高影响因子
Frontiers in Bioengineering and Biotechnology
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2025
·
IF 4.8
Yao Liu,Siyu Han,Panpan Gu,Bai Wang,Shiyan Tian,Xiaoxu Xu,Chunmei Yang,Shujun Liu,Jianshe Hu
Introduction: Modern wearable electronics demand materials that are simultaneously stretchable, conductive, and environmentally robust. Hydrogels meet some of these requirements but dehydrate or freeze easily. To overcome these limitations, we prepared a poly-ionic-liquid (PIL) ionogel that integrates high elasticity with stable ionic conductivity, aiming to enable reliable, skin-compatible strain and biopotential sensing.Methods: 1-Vinyl-3-butyl-imidazolium hexafluorophosphate and 1-butyl-3-methyl-imidazolium hexafluorophosphate were mixed at optimized mass ratios, followed by N,N’-methylenebis-acrylamide (cross-linker) and Irgacure-2959 (photoinitiator). The homogeneous precursor was UV-cured for 6 min to obtain a PIL ionogel (PIL-1 – PIL-4 series). Structural, thermal, mechanical, rheological, adhesive, and electrical characteristics were analysed by FT-IR, SEM, TGA/DSC, uniaxial tensile testing, rheometry, 90° peel tests, and real-time resistance measurements. Applications were evaluated by attaching the gel to human joints and by recording EMG/ECG signals.Results: The UV one-step process yielded a dense multi-cross-linked network that combined covalent and ionic interactions. The optimised sample (PIL-2) showed a fracture stress of ∼390 kPa with 320% elongation, sustaining a 500 g load without failure. It retained mass and softness after 30 days and adhered strongly (up to 90° peel strength >4 N) to glass, metals, and skin—even underwater. Electrical tests gave a gauge factor of 1.94 (0–100%), 3.98 (100–200%), and 4.04 (200–320%), with 400 ms response and 500 ms recovery. The gel monitored finger (30°/90°), wrist, and elbow motions reproducibly, functioned as a bioelectrode capturing stable EMG/ECG with clear PQRST waves, and reliably transmitted Morse code via hand gestures.Discussion: The solvent-free PIL ionogel couples mechanical toughness, wide-range elasticity, and stable ionic pathways, outperforming water-rich hydrogels in thermal/long-term stability. Its strong, humidity-tolerant adhesion eliminates extra fixatives, while rapid, high-gain strain transduction and low-impedance skin contact enable multimodal biosensing. These attributes position the material for next-generation flexible electronics, real-time health monitoring, and gesture-based human-machine interfaces.
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PubMed
高影响因子
Journal of Materials Chemistry A
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2025
·
IF 9.5
Wenjia Guo,Shiwei Chen,Yanlei Wang,Kun Li,Rongrong Wang,Ping Zhang,Xiuhong Yang,Hongyan He
High-temperature moisture is commonly encountered in both natural and industrial processes, presenting significant opportunities for clean electricity generation. However, due to insufficient selective ion transport, traditional moisture-driven power generators (MPGs) face challenges in achieving high performance at elevated temperatures. To address this issue, we develop a membrane by confining ionic liquids within MXene nanosheets, resulting in an MPG that delivers a remarkable electrical current of 4.49 mA and a power density of 239.00 µW cm−2 at 100 °C, comparable to traditional hydropower stations. Molecular dynamics simulations and in situ experimental characterization suggest that the highly hydrophilic surface of MXene facilitates the formation of an interfacial water layer and a stable hydrated anion state within the nanochannels at high temperatures. Consequently, the rapid diffusion of water at elevated temperatures significantly enhances the transport of anions while minimally affecting cation diffusion. This selective anion transport capability contributes to the MPG's excellent moisture-driven power performance at high temperatures. Leveraging this enhanced power output, we further integrate the MPG device with a geothermal power generation system, demonstrating continuous power generation and efficient utilization of high-temperature geothermal steam.
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高影响因子
Analytical Methods
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2013
·Vol. 5
·期 13
·3395-3402
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IF 1.855
Songyun Huang,Yuzhi Wang,Yigang Zhou,Li Li,Qun Zeng,Xueqin Ding
In this paper, an ionic liquid-based aqueous two-phase system (ATPs) has been developed for the effective extraction of bovine serum albumin (BSA). Compared with the effects of three different ionic liquids used in an aqueous two-phase system, a choline-like ionic liquid was selected as the suitable solution for bovine serum albumin. Extraction efficiencies of BSA were found to be dependant on the temperature, time, IL mass and the salt content. Based on single-factor experiments, these significant operating parameters of the ILs-ATP were respectively optimized. Experimental results show that 92.03–100.03% of the proteins could be extracted into the ionic liquid-rich phase in a single-step extraction. Repeatability, precision and stability experiments were investigated and the RSDs are lower than 2.3%, 1.7% and 4.7% respectively. Experiments indicated that intermolecular forces, the micelle phenomenon and the salting-out effect play important roles in the transfer process, and the aggregation phenomenon was the main driving force for the separation. Conformation of the protein was not affected after extraction into the upper ionic liquid-rich phase according to the determination by UV-visible (UV-vis), fluorescence spectra, dynamic light scattering (DLS), Fourier transform infrared (FT-IR) spectroscopy and TEM. It is suggested that the method of choline-like ILs-based ATPs for the selective separation of protein would have potential applications in bio-analysis and bio-separation.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Chenglong Shi,Hongxia Li,Bing Liu,Yaru Qin,Guixiu Song
A new functionalized ionic liquid (FIL), tetrabutylammonium 2-ethylhexyl hydrogen-2-ethylhexylphosphonate ([N 4444 ][EHEHP]), was prepared and used in the extraction of lithium ion from aqueous solution. The factors affecting the extraction efficiencies, such as aqueous acidity, extractant concentration and temperature, were optimized. The mechanism involved in the extraction system was analyzed by slope analysis and FT-IR data. According to the Van't Hoff equation, the thermodynamic functions of the extraction reaction in ionic liquid system were obtained. Liquid/liquid extraction tests indicated that the ionic liquid system exhibited better selectivity towards lithium ions in the solution containing alkali metal ions . In addition, the quantitative stripping of lithium ions from the loaded ionic liquid phase was carried out and the effect of hydrochloric acid concentration on stripping rate was investigated in detail.
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高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 3
·1044-1050
·
IF 7.059
Bo Li,Lei Kan,Chao Li,Wei Li,Yihan Zhang,Rui Li,Hao Wei,Xinyue Zhang,Ning Ma
There is a challenge to prepare a hydrogel devoted to fabricate a form of multi-responsive skin-like sensors piggybacking on tactile controlled robots, which could grab the soft and fragile items at subzero temperatures. Herein, we demonstrate a supramolecular ionic liquid hydrogel wherein ureidopyrimidinone (UPy) containing hydrophilic polyurethane (PU) was employed as the network while the aqueous solution of imidazolium ionic liquid acted as a free phase. Combining the advantages of hydrophilic PEG segments, hydrophobic UPy moieties, and the imidazolium ionic liquid, this supramolecular hydrogel exhibited high water content (∼86%), swelling ratio (∼400%), elongation (∼750%), low resistivity (∼0.51 kΩ cm) and excellent transparency (∼98%). Moreover, the most striking characteristic was that the supramolecular hydrogel maintained its outstanding mechanical and thermal sensitivity at subzero temperatures, e.g., −20 °C. The supramolecular ionic liquid hydrogel was utilized to fabricate E-skin for the intelligent robot to realize pressure feedback and thermal recognition. This line of research not only demonstrates that anti-freezing stimuli-responsive hydrogels are a promising candidate for E-skins used in harsh conditions, but also contribute to the design and application of supramolecular polymer-based hydrogel sensors for future artificial intelligence applications.
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高影响因子
POLYMER
·
2019
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IF 3.771
Tao Xi,Yingying Lu,Xinyu Ai,Lin Tang,Lulu Yao,Wentao Hao,Peng Cui
Benzene and cyclohexane are both important raw materials in polymer chemical industry. However, they are hard to be separated via the traditional distilling methods. In this work, ionic liquid copolymerized waterborne polyurethane (IL-co-PU) membranes were proposed for the pervaporation separation of benzene/cyclohexane mixtures. The results, including swelling rate, diffusion coefficients , partial flux, permeance and selectivity, showed that the IL-co-PU membranes could preferentially absorb and transfer benzene molecules rather than cyclohexane . The ILs might have functioned as facilitated transporter in the membranes. The permeation flux and separation factor of the IL-co-PU membranes increased simultaneously with the increase of IL contents. That is, these membranes had no trade-off between permeability and selectivity, which most of the polymer membranes suffered. With consideration of the good performance and easy handling property of the IL-co-PU membranes, they are of great potential in pervaporation separation of benzene/cyclohexane mixtures.
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高影响因子
SOLID STATE IONICS
·
2014
·
IF 2.112
Heng Zhang,Wenfang Feng,Zhibin Zhou,Jin Nie
A new polymeric ionic liquid (PIL), poly(1-vinyl-3-methylimidazolium) bis(fluorosulfonyl)imide (PVyMIM-FSI), has been prepared by polymerization of the monomer of ionic liquids, 1-vinyl-3-methylimidazolium bis(fluorosulfonyl)imide (VyMIM-FSI). Its structure and composition have been characterized by 1 H and 19 F NMR, and viscosity-average molecular weight ( M v ). For comparison, the corresponding PIL, poly(1-vinyl-3-methylimidazolium) bis(trifluoromethanesulfonyl)imide (PVyMIM-TFSI), is also prepared and characterized. The physicochemical properties of the binary composite electrolytes of lithium bis(fluorosulfonyl)imide (LiFSI)/PVyMIM-FSI with various concentrations of LiFSI have been comparatively studied with those of the corresponding lithium bis(trifluoromethylsulfonyl)imide (LiTFSI)/PVyMIM-TFSI system, in terms of DSC , TGA , ionic conductivity , and lithium ion transference number ( t Li + ). Both the FSI − - and TFSI − -based PILs are thermally stable up to 250 °C. While both types of the prepared PILs show a significant decrease in glass transition temperature ( T g ) upon addition of lithium salt, the values of T g for the composite electrolytes of LiFSI/PVyMIM-FSI are all significantly lower by 20–60 °C in magnitude than those of the corresponding LiTFSI/PVyMIM-TFSI composite ones, indicating much better plasticizing effect for FSI − vs. TFSI − . The ionic conductivities of LiFSI/PVyMIM-FSI are all higher by about 2 orders in magnitude than those of the corresponding LiTFSI/PVyMIM-TFSI with the same concentration of lithium ions.
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高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Shengxin Chen,Yingwei Li,Zicheng Wang,Ying Jin,Ruixia Liu,Xingang Li
Hollow structure nanoreactors take advantage of catalyst loading and enhanced activity by shell construction. In this work, functionalized poly(ionic liquid)s (PILs) with hollow spherical structures were synthesized by polymerization- and quaternization-based approaches. These hollow structure PILs (HPILs) could be controllable designed from IL monomer easily, giving HPILs various properties. In the subsequent selective oxidation of cyclohexane , the HPILs acting as nanoreactors could efficiently improve the activity of metal salt catalysts (CoCl 2 ) and displayed adjustable selectivity for cyclohexanone, cyclohexanol (KA) or adipic acid (AA) by different types of HPILs. In kinetic study , it follows first-order reaction kinetics which CoCl 2 /HPIL-C12 had a lower the activation energy of 29.1 kJ/mol. Importantly, these nanoreactors storing the catalysts could be recovered and reused more than 7 times without significant loss of activity. A theoretical model for the hollow spherical reactor was further established to support the advance of the HPILs reactor, which could also help to predict reaction process in other core-shell catalytic system. Due to controlled substrate transfer and enhanced radical generation in HPILs, the reaction process could be adjusted to enhance the conversion of cyclohexane and selective oxidation to AA.
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高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 4
·1215-1223
·
IF 3.186
Wang Yun,Cheng Hong,He Jia-Rui,Yao Qiao-Xia,Li Li-Ling,Liang Zhi-Hui,Li Xiang
The Knoevenagel condensation of acetylacetone and aromatic aldehyde catalyzed by lipase from porcine pancreas(PPL) and α-amylase from hog pancreas in ionic liquids and deep eutectic solvents was achieved for the first time. The highest yields is up to 96.1%. Mild reaction conditions, enhanced rates, improved yields and reagents’ reactivity which is different from that in standard organic solvents are the remarkable features observed in ionic liquids and deep eutectic solvents. Graphical Abstract
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高影响因子
Journal of Chemistry
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2018
·
IF 1.726
Yinke Zhang,Hang Xu,Mengfan Jia,Zhuang Liu,Deqiang Qu
Response surface methodology (RSM) was selected to optimize a desulfurization process with metal based ionic liquids ([Bmim]Cl/CoCl2) and potassium monopersulfate (PMS) together to remove benzothiophene (BT) from octane (simulating oil). The four experimental conditions of PMS dosage, [Bmim]Cl/CoCl2 dosage, temperature, and reaction time were investigated. The results showed that the quadratic relationship was built up between BT removal and four experimental variables with 0.9898 fitting coefficient. The optimal conditions were 1.6 g (20 wt%) PMS solution, 3.2 g [Bmim]Cl/CoCl2, 46°C, and 23 min, which were obtained based on RSM and experimental results. Under the optimal condition, predicted sulfur removal rate and experimental sulfur removal rate were 96.7% and 95.4%, respectively. The sequence of four experimental conditions on desulfurization followed the order temperature > time > [Bmim]Cl/CoCl2 dosage > PMS solution dosage.
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高影响因子
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