ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Yizhuo Liu,Wenqi Wang,Kai Gu,Jinrong Yao,Zhengzhong Shao,Xin Chen
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. The physically crosslinked PVA/EMImAc/H2O hydrogels showed better mechanical properties and transparency than the traditional PVA hydrogel prepared by the freeze–thaw method due to the formation of homogeneous and small PVA microcrystals in the EMImAc/H2O binary solvent system. More importantly, the PVA/EMImAc/H2O hydrogel exhibited significant anti-freezing and water-retaining properties because of the presence of the IL. The hydrogels remained flexible and conductive at temperatures as low as −50 °C and retained more than 90% of their weight after storage in open-air conditions for 2 weeks. In addition, the thermal stability of the hydrogel could be increased to 95 °C through the addition of Mg(II) ions. A multimodal sensor based on the PVA/EMImAc/H2O/Mg(II) hydrogel showed high sensitivity and a quick response to changes in pressure, strain, and temperature, with both long-term stability and a wide working temperature range. This study may open a new route for the fabrication of functional PVA-based hydrogel electrolytes and provide a practical pathway for their use in multifunctional electronic and sensory device applications.
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DOI
高影响因子
CARBOHYDRATE POLYMERS
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2017
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IF 4.811
Xinran Xiang,Song Ding,Hongbo Suo,Chao Xu,Zhen Gao,Yi Hu
A nanocomposite (SBA-CIL-CS) which was combined mesoporous silica SBA-15 material with chitosan via ionic liquid as the bridging agent was successfully fabricated. The morphology and structure of the nanocomposite were characterized in detail with transmission electron microscope, fourier transform infrared spectroscopy, thermogravimetric analysis and nitrogen adsorption–desorption techniques. SBA-CIL-CS was investigated as an efficient support for immobilization of porcine pancreas lipase (PPL) and possessed high immobilization efficiency. The properties of immobilized enzyme (SBA-CIL-CS-PPL) such as activity, stability and reusability have been significantly improved, and a preferable pH and temperature tolerance were obtained as well. Results demonstrated the inorganic-organic nanocomposite could be used as an ideal support for enzyme immobilization.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Jin Wang,Longhui Fang,Yutao Ban,Xiangyang Liu,Maogang He
Due to their high global warming potential (GWP), hydrofluorocarbons (HFCs) are included in various regulations as substances to be phased down. Gas separation membrane technology is expected to provide a better choice for refrigerant separation. In this study, a series of metal-organic frameworks (MOFs)/ polydimethylsiloxane (PDMS) mixed matrix membranes (MMMs) were prepared for the separation of the refrigerant blend R454A (GWP = 145), which consists of a near-zeotropic difluoromethane (R32, GWP = 675) and 2,3,3,3-tetrafluoropropene (R1234yf, GWP = 4). ZIF-71-NH 2 was prepared for the first time by solvent-assisted ligand exchange (SALE), and then ZIF-71-NH 2 @ Ionic Liquid (IL) was prepared by embedding [C 2 mim][BF 4 ] into the pores of ZIF-71-NH 2 by capillary action method. The results showed that a hydrogen bonding network was established between the amino group and PDMS, which improved the interfacial compatibility, and reduced the pore size of ZIF-71, which contributed to an excellent gas separation performance of ZIF-71-NH 2 /PDMS MMMs. Restricting [C 2 mim][BF 4 ] to the ZIF-71-NH 2 pore can further reduce its pore size, and enhance R32/R1234yf separation performance due to the high selective solubility for R32 and R1234yf. The selectivity of 10 wt% ZIF-71-NH 2 /PDMS MMM is 25.6 % over that of 10 wt% ZIF-71/PDMS MMM. The selectivity of ZIF-71-NH 2 @IL/PDMS MMM is 38.3 % higher than that of ZIF-71-NH 2 /PDMS MMM. The ZIF-71-NH 2 /PDMS and ZIF-71-NH 2 @IL/PDMS MMMs exhibited the most excellent R32/R1234yf separation performance compared with the data currently published in the literature. Moreover, both designed MMMs demonstrated excellent resistance to ageing.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 41
·32853-32861
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IF 3.84
Jintao Yang,Jiongzhou Zheng,Jingjing Zhang,Li Sun,Feng Chen,Ping Fan,Mingqiang Zhong
Poly(ionic liquid)s (PILs) with well-defined architectures have shown significant potential in various fields, but establishing an easy method for their synthesis remains a challenge. Herein, comb-like copolymers with polystyrene and PIL as backbones and side chains, respectively, were prepared by directly polymerizing ionic liquid monomer by atom transfer radical polymerization using poly(styrene-co-4-vinylbenzyl chloride) as macroinitiator. NMR, GPC, and FTIR were used to characterize the molecular weights and compositions of macroinitiators and resultant copolymers. Results demonstrated successful synthesis, and also indicated that graft density and side chain length of the comb-like copolymers can be readily controlled by tuning macroinitiator composition and polymerization time. DSC and EIS measurements were further performed to investigate the thermal and electrochemical properties of comb-like copolymers with various architectures. Both glass transition temperature and impedance were found to highly depend on structure, particularly on the graft density of side chains. Furthermore, these comb-like copolymers were used both as stabilizer to disperse reduced graphene oxide (RGO) nanoplatelets in organic solvent and as an additive for N2/CO2 separation membranes. As compared to neat PIL, a highly stable suspension of RGO in propylene carbonate and a composite membrane with enhanced N2/CO2 selectivity were obtained in the presence of comb-like copolymers. Given the many advantages of diverse compositions, multiple groups, and tunable structure of PILs, the comb-like copolymers show great promising in stabilizing carbon materials and membrane separation.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Jingyu Liu,Chaoyue Zhang,Daiyu Song,Yihang Guo,Jiyan Leng
Brønsted acidic ionic liquid (BAIL) functionalized dendritic fibrous nanosilica sphere catalysts, [C 3 PrIm][SO 3 CF 3 ]-DFNS (C 3 = PrSO 3 H), are prepared via a hexadecylpyridinium bromide reverse micelle-directed co-condensation of tetraethoxysilane and 3-chloropropyltriethoxysilane in a water-in-oil emulsion system followed by successive chemical modification with imidazole , 1,3-propanesultone and trifluoromethane sulfonic acid , and the particle diameter, fiber thickness and fiber density of the catalysts are well-adjusted by changing the composition of the starting materials. The [C 3 PrIm][SO 3 CF 3 ]-DFNS catalysts are successfully applied in transformation of 5-hydroxymethylfurfural (HMF) to ethyl levulinate (EL). Combination of superstrong Brønsted acidity and unique open three-dimensional dendritic fibrous nanostructures , the [C 3 PrIm][SO 3 CF 3 ]-DFNS can transform HMF in ethanol media rapidly and completely; nevertheless, the selectivity to EL remarkably depends on the fiber thickness and fiber density, which affect diffusion and mass transfer of the reactants and products as well as the accessibility to the acid sites. Among the tested [C 3 PrIm][SO 3 CF 3 ]-DFNS catalysts, the [C 3 PrIm][SO 3 CF 3 ]-DFNS- 1 with the thinnest fiber sheet and considerably high fiber density exhibits the highest selectivity to EL (93.0%). The [C 3 PrIm][SO 3 CF 3 ]-DFNS catalysts also show good reusability, and they can be reused at least for five times without obvious changes of the reactivity, total selectivity, morphology, textural properties and chemical structure .
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高影响因子
Journal of Macromolecular Science Part B-Physics
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2023
·
IF 1.4
Bo Zhang,Ruixin Wang
Compared with other types of sensors, capacitive flexible pressure sensors (CFPS), with low sensitivity, are more susceptible to environmental changes. It is still a considerable challenge to achieve high sensitivity, excellent mechanical properties and long-time structural stability simultaneously. Targeting the aforementioned issues, herein, Ti3C2 (MXene) with high dielectric constant was firstly chemically modified with a poly(ionic liquid) (PIL) via surface-initiated ATRP, and then combined with a porous polyurethane foam (PUF) 3D network structure via a one-step blending foaming method. Thanks to the organic-inorganic hybrid network based on the PU/MXene porous structures and the uniformly distributed micro-capacitor structure provided by MXene@PIL, the mechanical properties, structural stability, flame retardancy and dielectric properties of the composite foam were all significantly enhanced. When the content of MXene@PIL was 10%, the sensitivity of CFPS based on this dielectric were 17.1, 5.2, and 2.5/KPa in the pressure ranges of 0-1 KPa, 1-12 KPa and 12-100 KPa, respectively. In addition, the sensor showed the response and recovery times of 88 and 82 ms under a low pressure of 355 Pa. The light, flexible sensor prepared in this work is expected to be used in wearable devices to monitor physiological signals, and it should also be a good candidate for the next generation of man-machine interface characterization devices.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2025
·
IF 5.2
Yu-Ling Wang,Kang Zhou,Hai Yu,Zhiliang Jin,Fengqi Fan,Liping Wang,Ping Wen,Rui Dong,Mingjin Fan
Multifunctional additives are essential to achieve efficient lubrication in practical service. In this work, three novel ionic liquids (ILs) were designed and synthesized based on the traditional antioxidant molecule (3,5-Di-tert-butyl-4-hydroxyphenylpropionic acid). Not only the improvement of oxidation resistance and thermal stability, the strengthening of friction-reducing (decrease by 40 %), anti-wear properties (decrease by 80 %) and stability is more noteworthy when applied as the functional additive of base oil (PAO6). The electrostatic interaction between IL anions and cations and the balance of Van der Waal's forces is favorable for its unique interfacial self-assembly behavior. This work provides theoretical guidance for the design of multifunctional additives and the innovation of high-performance antioxidant lubricants.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Haozhan Chu,Shaojuan Zeng,Xiangping Zhang,Guoxiong Zhan,Bo Wang,Hongyu Zhang,Sheng Zhong,Wei Liu
Ionic liquids (ILs) show great application potentials in CO 2 capture due to extremely low vapor pressures, tunable structures, and strong CO 2 affinity. Up to date, many efforts have been focused on the design and absorption performance of novel functionalized ILs, rather than desorption performance. In our previous work, the IL solvent [Cho][Triz]/TMS exhibited exceptional CO 2 absorption performance. As a successive study on decreasing regeneration energy consumption, this work focused on the design and synthesis of novel metal-modified MCM-41 catalysts with multiple acidic sites to enhance CO 2 catalytic desorption in the nonaqueous [Cho][Triz]/TMS (80 wt%/20 wt%) absorbent under lower temperatures. Among all the composite MCM-41 catalysts, the CoM-1/4 catalyst exhibits superior catalytic performance because of the increase of Brønsted acid sites by 232.3 % and Lewis acid sites by 56.2 % compared with pristine MCM-41, which promote CO 2 desorption by accelerating C-N bond breaking. The CO 2 desorption rate and amount increased by 180.2 % and 95.7 %, and the activation energy reduced by 46.7 % compared to the non-catalysis. Therefore, the theoretical regeneration energy consumption of the catalyst-added system was 0.88 GJ/t CO 2 , representing a 76.7 % reduction compared with the 30 wt% MEA solution. Furthermore, the CoM-1/4 catalyst maintained high catalytic activity after 20 cycles. This work indicated that the CoM-1/4 catalyst effectively enhanced the regeneration performance of IL absorbent, facilitating the development of an energy-efficient CO 2 capture process for industrial applications.
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高影响因子
JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Yanan Xu,Yu Zhang,Shiyue Zhang,Qing Hu,Hao Li,Wenkai Wang,Hongbin Du
The reported reaction systems employed for the synthesis of nano-silicon typically involve high temperatures, costly apparatus, meticulously controlled inert atmospheres, or highly reactive reducing agents. As a result, these factors inevitably lead to substantial energy expenditure, safety risks, and intricate operational procedures. Herein, an innovative approach is presented for the synthesis of large-size and highly-crystalline nano-Si through an ionic liquid reaction system. This unique room temperature ionic liquid system effectively facilitates the internal kinetic reactions and synthesizes large-size nano-Si with primary particle sizes ranging from 63 to 155 nm by varying the reaction temperature. Remarkably, when employed as the anode material in lithium-ion batteries, the resulting nano-Si-200 without the need for carbon coating and hydrofluoric acid etching treatment exhibits exceptional long-term cycling stability, with a superior capacity retention rate of 98.8 % at 0.5 A g −1 after 300 cycles. Moreover, the retention rate remains at 80.2 % while maintaining a specific capacity of 1097 mA h g −1 after 700 cycles at 2 A g −1 , and persistently endures for 1000 cycles at 3 A g −1 with a specific capacity of 962 mA h g −1 . This preparative system provides a new avenue for the synthesis of large nano-Si and holds promise for inspiring advancements of nano-Si in various fields.
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高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Na Cao,Huiling Du,Jie Lu,Zhuo Li,Qian Qiang,Hai Lu
Lithium metal batteries (LMBs) demonstrate significant potential as high-energy-density storage devices. However, their practical application is hindered by challenges such as lithium dendrite formation, flammability , and the limited operating temperature range of commercial carbonate electrolytes. To address the issue, we developed a localized highly concentrated electrolyte (LHCE) using an ionic liquid as the solvent. The LHCE exhibits non-flammability, a wide operating temperature range (−30 to 70 °C), and forms a rigid, highly ion-conductive solid electrolyte interphase (SEI), which significantly enhances the cycling stability of LMBs.
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高影响因子
LANGMUIR
·
2024
·
IF 3.7
Xue Lv,Aowei Lv,Ting Xie,Zhubao Shao,Guangzhong Yin,Da Li,Liyang Xu,Shulin Sun
Nitroaromatic compounds have a wide range of applications. However, they pose a significant threat to both the environment and human health. Ionic liquid hydrogels (ILs-gels) have emerged as a cost-effective and environmentally friendly option for various applications. However, conventional ILs-gels are known to possess mechanical flaws or defects. The procedure utilized a facile synthesis route that involved the polymerization of acrylamide (AM) and ionic liquids (ILs) to create a novel candidate for nanoparticle absorption. This study resolved this issue by creating toughened hydrophobic combined hydrogels synthesized through the addition of SiO2@poly(butyl acrylate) core–shell inorganic–organic hybrid latex particles (SiO2@PBA) to the AM–ILs mixture. The SiO2@PBA particles were chosen to provide the hydrogels with exceptional stretchability (up to 4050% strain) and high mechanical properties (tensile strength of 126 kPa) by acting as both a nanotoughener and a cross-linking point for hydrophobic linkage. Additionally, the P(AM/ILs)-SiO2@PBA hydrogel served as a template for the in situ and stable formation of palladium (Pd) nanoparticles. By incorporation of these Pd nanoparticles as catalysts into P(AM/ILs)-SiO2@PBA hydrogel carriers, the resulting P(AM/ILs)-SiO2@PBA/Pd hydrogels exhibited the ability to catalyze the degradation of p-nitrophenol. Remarkably, even after 15 applications, the efficiency of the degradation process remained consistently above 90%. Thus, the innovative SiO2@PBA toughened ILs-hydrogel design strategy can be utilized to develop robust and stretchable hydrogel materials for catalytic use in the sewage disposal industry.
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PubMed
高影响因子
Energy Sources Part A-Recovery Utilization and Environmental Effects
·
2025
·
IF 2.2
Ziyi Guan,Kai Ma,Xuezheng Liang
The novel hypercrosslinked polymer-based solid acid with ionic liquid moiety was synthesized via the phosphonium quaternization of triphenylphosphine and 4,4’-bis(chloromethyl)-1,1’-biphenyl (BCMBP), polycondensation, and sulfonation. The polymer owned a rigid aromatic framework, which provided sufficient sulfonation sites. The hypercrosslinked structure assured the high stability and surface area (574 m2/g) of the solid acid. The ionic liquid moiety in the polymer provided the special active sites, with free coordinating anions, which made the active sites quite accessible to reactants. A novel hypercrosslinked porous polymer-based solid acid with ionic liquid moiety showed high activity for the biodiesel synthesis from the esterification of oleic acid (98.8% conversion) and integrated esterification−transesterification of waste oil (99.2% total yield), respectively. The novel solid acid can be recycled 10 times with little decrease in activity (from 99.2% to 97.7%). The ionic liquid moiety, high surface area, high acidity (3.1 mmol/g), and the rigid aromatic framework were the key factors for the high activities, which made the novel solid acid a promising candidate in industrial applications.
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DOI
高影响因子
危险品化学品经营许可证（带存储）