Polymers
·
2020
·Vol. 12
·期 8
·1755
·
IF 3.426
Jianghe Liu,Sultan Ahmed,Zeba Khanam,Ting Wang,Shenhua Song
In this study, novel ionic liquid-incorporated Zn-ion conducting polymer electrolyte membranes containing polymer matrix poly (vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) and 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMITf), along with zinc trifluoromethanesulfonate Zn(Tf)2, are prepared and investigated. It is ascertained that the optimal membrane ILPE-Zn-4 (the mass ratio of EMITf:Zn(Tf)2:PVDF-HFP is 0.4:0.4:1), with abundant nanopores, exhibits a high amorphousness. At room temperature, the optimized electrolyte membrane offers a good value of ionic conductivity (~1.44 × 10−4S cm−1), with a wide electrochemical stability window (~4.14 V). Moreover, the electrolyte membrane can sustain a high thermal decomposition temperature (~305 °C), and thus its mechanical performance is sufficient for practical applications. Accordingly, the ionic liquid-incorporated Zn-ion conducting polymer electrolyte could be a potential candidate for Zn-based energy storage applications.Keywords:polymer electrolyte;Zn-ion conducting;ionic liquid;ionic conductivity
研究领域:
材料科学
·
能源存储
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DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2020
·Vol. 15
·期 1
·118-126
·
IF 3.552
Liu Jie,Shen Jiahao,Wang Jingjing,Liang Yuan,Wu Routeng,Zhang Wenwen,Shi Delin,Shi Saixiang,Wang Yanping,Wang Yimin,Xia Yumin
To enhance the solubility of polyanilines (PANI), polymeric ionic liquid (PIL) was introduced into the polymerization synthesis of PANI with various proportions. The structure and properties of the modified PANIs were characterized by 1 H NMR, Fourier transform infrared spectroscopy, thermogravimetric analysis, ultraviolet-visible spectrum, etc. It was found that the obtained PANIs doped with PILs were soluble in various organic solvents such as N , N -dimethyl formamide and acetonitrile. Compared with the pure PANI, the PANIs doped by PILs showed remarkable solubility and their chemical structure and conductivity kept integrated.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2015
·Vol. 22
·期 4
·1-6
·
IF 1.92
Wang Guo-Xiang,Lu Mang,Hou Zhao-Hui,Yang Chang-An,Liang En-Xiang,Liu Li-chao,Wu Hu,Li Xiang-Lei,Xu Yi-Xue
The photo-induced atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) was successfully carried out in ionic liquid at ambient temperature with ethyl 2-bromoisobutyrate as initiator and CuBr 2 /N,N,N′,N′,N″-pentamethyldiethylenetriamine as the complex catalyst system. In this system, TiO 2 was used as photocatalyst. The well-controlled poly(methyl methacrylate) (PMMA) was obtained, as evidenced by the controlled molecular weights of the obtained. The prepared PMMA had narrow molecular weight distributions. The polymerizations were manipulated by turning on/off the light. The chemical structure of the obtained PMMA was characterized by 1 H NMR. Chain extension experiment with bromine-atom-ended PMMA as macroinitiator was carried out successfully to verify the living nature of photo-induced ATRP of MMA.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
CELLULOSE
·
2017
·Vol. 24
·期 3
·1483-1491
·
IF 3.417
Chen Jiachuan,Jiang Qimeng,Yang Guihua,Wang Qiang,Fatehi Pedram
Enhancing the swelling of chemithermomechanical pulp is essential for improving its physical properties and thus broadening its end-use applications. In this work, ionic liquid (IL) using 1-allyl-3-metheylimidazolium chloride ([Amim]Cl) was used for reducing hydrogen bonding within the fiber wall, and ultrasonic treatment was used for improving the performance of IL treatment. Mixing IL with pulp fibers at 5 ml/g concentration decreased the Canadian standard freeness (CSF) of pulp from 760 to 570 ml at room temperature, and the pretreatment with ultrasonic treatment for 20 min reduced its CSF to 545 ml. The ultrasonic-assisted IL treatment improved the tensile, tear and burst indices as well as the folding endurance of the cellulosic network by 41, 36, 12 and 150%, respectively. The surface charge density and area of fibers were improved, but the lignin and hemicellulose contents of the fibers were reduced via ultrasonic-assisted IL treatment.
研究领域:
制浆造纸工程
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材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Yang Yu,Zeyu Yang,Shujing Ren,Yanan Gao,Liqiang Zheng
Biocompatible antibacterial hydrogels as novel dressing materials have been a widely researched method in modern medical technology. Here, we designed and prepared a new type of multifunctional antibacterial hydrogels that used poly(vinyl alcohol) (PVA)-tetrahydroxyborate anion (B(OH) 4 − ) hydrogel as a vector and pyrrolidinium ionic liquids (ILs) as antibacterial drugs . The formation of borate ester bonds between PVA and B(OH) 4 − as dynamic network junctions endows hydrogels with multiple functions. Moreover, the as-prepared hydrogel exhibited effective anti-microbial activity against Escherichia coli and Staphylococcus aureus . Our results indicated that the hydrogels containing ILs with longer alkyl chain exhibited more pronounced antibacterial properties. The moisture retention, self-healing, syringeability and multiresponse behavior together with the antibacterial properties of the hydrogels make them ideal candidates as multifunctional dressing materials for joint skin wound healing.
研究领域:
生物材料学
·
医学工程
·
药剂学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Ying Zhang,Dongfang Liu,Baogang Wang,Hongsheng Lu,Zhiyu Huang
Due to the limitation of anhydrous conditions, the research on anhydrous microemulsion has been developed rapidly. In this paper, CO 2 /N 2 -responsive ILs was used as a polar phase instead of water to prepare anhydrous surfactant-free microemulsion (SFME) with ethanol and n-hexane. This research group has previously studied the preparation process and CO 2 /N 2 responsiveness of the ILs. Then the boundary between multi-phase zone and single-phase zone of surfactant free microemulsion system was determined by drop addition. And the single-phase region was divided into three regions: O/W, B.C and W/O by conductivity and uv–vis. N 2 was introduced into SFME system at 30℃. Interestingly, we found that there was no separation of oil and water. Through the study on DLS , pH and the mutual solubility of Dipropylamine, ethanol and n-hexane, it was found that demulsification occurred in the system, and the absence of oil-water separation was due to the formation of uniform and transparent mixed solution in the system. Finally, It is found that changing the temperature can make the boundary of the multi-phase zone and the single-phase zone in the three-phase diagram of SFME system move. In addition, temperature also had an effect on the particle size of SFME system.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 4
·787-790
·
IF 0.605
Song Xuyan,Li Dan,Li Ran,Chen Yikun,Huang Long,Wei Min,Pan Xi,Zhou Hongshen,Tang Haolin
Ionic liquid modified silica nanoparticles were synthesized using a simple silane chemistry, followed by substitution reaction. The phenol adsorption performance was tested using temperature programmed desorption technique. The experimental results reveal that the introduction of ionic liquids on the surface of silica nanoparticles can improve the adsorption capacity of phenol compared to the pure silica nanoparticles. The initial adsorption capacity reaches 0.312 mmol·g −1 at 25 °C under total pressure of 0.2 bar and it decreases slightly in the following adsorption-desorption cycles. The results demonstrate that introduction of ionic liquids can improve the phenol adsorption capacity and the simple material preparation process is feasible for industrial applications.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ENERGY & FUELS
·
2014
·
IF 2.733
Hao Ma,Rui Zhang,Xianghai Meng,Zhichang Liu,Haiyan Liu,Chunming Xu,Rentan Chen,Peter A. A. Klusener,Jan de With
Composite ionic liquid (CIL) prepared from triethylamine hydrochloride, anhydrous aluminum(III) chloride, and cuprous chloride is a new catalyst for isobutane alkylation. This composite ionic liquid alkylation (CILA) technology yields an alkylate with favorable product distribution. CILA is a promising replacement for sulfuric acid and hydrofluoric acid alkylation technologies. However, some solids are formed during alkylation, and solid amount increases with time on stream. In a number of separation steps, the used CIL was divided into liquid and solid. Nuclear magnetic resonance, X-ray diffraction, X-ray photoelectron spectroscopy, and elemental analyses were applied to characterize these fractions. The content of acid-soluble oil (ASO) in solid was also investigated. The results showed that the solid was mainly cuprous chloride and contained about 1 wt % ASO. The loss of aluminum chloride and detachment of CuCl as a form of solid from CIL resulted in the decrease of CIL acidity and product selectivity.
研究领域:
化学工程
·
催化化学
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2014
·
IF 5.039
Yantao Wang,Ligang Wei,Kunlan Li,Yingchong Ma,Ningning Ma,Shan Ding,Linlin Wang,Deyang Zhao,Bing Yan,Wenying Wan,Qian Zhang,Xin Wang,Junmei Wang,Hui Li
Lignin dissolution in dialkylimidazolium-based ionic liquid (IL)–water mixtures (40 wt%–100 wt% IL content) at 60 °C was investigated. The IL content and type are found to considerably affect lignin solubility. For the IL–water mixtures except 1-butyl-3-methylimidazolium tetrafluoroborate ([C 4 C 1 im]BF 4 ), the maximum lignin solubility can be achieved at 70 wt% IL content. Lignin solubility in IL–water mixtures with different cations follows the order 1-butyl-3-methylimidazolium ([C 4 C 1 im] + ) > 1-hexyl-3-methylimidazolium ([C 6 C 1 im] + ) > 1-ethyl-3-methylimidazolium ([C 2 C 1 im] + ) > 1-octyl-3-methylimidazolium ([C 8 C 1 im] + ) > 1-butyl-3-ethylimidazolium ([C 4 C 2 im] + ) > 1-butyl-3-propylimidazolium ([C 4 C 3 im] + ). For IL mixtures with different anions, lignin solubility decreases in the following order: methanesulfonate (MeSO 3 − ) > acetate (MeCO 2 − ) > bromide (Br − ) > dibutylphosphate (DBP − ). Evaluation using the theory of Hansen solubility parameter (HSP) is consistent with the experimental results, suggesting that HSP can aid in finding the appropriate range of IL content for IL–water mixtures. However, HSP cannot be used to evaluate the effect of IL type on lignin solubility.
研究领域:
化学工程
·
材料科学
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DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
·
2014
·Vol. 92
·期 1
·133-140
·
IF 1.62
Wang Aili,Chen Li,Xu Fan,Yan Zongcheng
Glycerol trioleate-based ionic liquid microemulsions are promising biolubricant alternatives. This study presents the formation and the phase behavior of glycerol trioleate-based ionic liquid microemulsions. Areas of the single-phase domain were calculated to illustrate the phase-forming capacities of the designed systems. The effects of ionic liquid anions and cations, oxyethylene groups’ number of surfactant, mass ratio of surfactant to co-surfactant, chain length of co-surfactant, and temperature on the phase behavior and phase-forming capacities of glycerol trioleate-based ionic liquid microemulsions were investigated using pseudo-ternary phase diagrams. The results showed that the phase-forming capacities of glycerol trioleate-based ionic liquid microemulsions with different ionic liquids were Tf 2 N − -based > PF 6
− -based > BF 4
− -based, OMIM + -based > HMIM + -based > BMIM + -based > EMIM + -based. The designed systems contained ionic liquid-glycerol trioleate amphiphilic balance; thus, glycerol trioleate-surfactant micelles achieved the maximum solubilization capacity for the ionic liquid when the surfactant had approximately five oxyethylene groups with a surfactant to co-surfactant mass ratio of 4:1. Moreover, increasing the temperature and the aliphatic chain length of co-surfactant from C2 to C6 enhanced the ability of glycerol trioleate and ionic liquids to form microemulsions.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2016
·
IF 4.219
Guangfei Qu,Weiwei He,Yingying Cai,Xi Huang,Ping Ning
This study discussed the catalytic cracking process of cellulose in ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([bmim]OTF) under 180 °C, 240 °C and 340 °C, found that [bmim]OTF is an effective catalyst which can effectively reduce the pyrolysis temperature(nearly 200 °C) of the cellulose. FRIR, XRD and SEM were used to analyze the structure characterization of fiber before and after the cracking; GC–MS was used for liquid phase products analysis; GC was used to analyze gas phase products. The results showed that the cellulose pyrolysis in [bmim]OTf mainly generated CO 2 , CO and H 2 , also generated 2-furfuryl alcohol, 2,5-dimethyl-1,5-diallyl-3-alcohol, 1,4-butyrolactone, 5-methyl furfural, 4-hydroxy butyric acid, vinyl propionate, 1-acetoxyl group-2-butanone, furan formate tetrahydrofuran methyl ester liquid product, and thus simulated the evolution mechanism of cellulose pyrolysis products based on the basic model of cellulose monomer.
研究领域:
化学工程
·
生物质能
·
材料科学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2018
·
IF 2.011
Ying Song,Xinqiao Tang,Shengwen Kong,Lu Bai,Xiaozhi He,Fanbao Meng
A series of hexamethylenetetramine-based ionic liquid crystals (ILCs) containing cholesterol derivatives and different anions including Br −1 , BF 4 −1 , PF 6 −1 , H 2 PO 4 − , CF 3 COO − , TsO − , and CSA-SO 3 - were synthesized, and the characterization, possible applications and self-assembly behavior were discussed. The ILCs were synthesized from bromine-containing precursor liquid crystal, which was made of cholesterol and 4-bromobutyryl chloride. The ILCs showed smectic A (SmA) mesophase . For these hexamethylenetetramine-containing ILCs, T g , T i and liquid-crystalline temperature range reduced slightly in sequence of Br −1 , BF 4 −1 , PF 6 −1 , H 2 PO 4 − , CF 3 COO − , TsO − , and CSA-SO 3 - anions. But the d -spacing of the lamellar structure in SmA phase increased in this sequence of these anions. Because of microphase separation and ionic electrostatic attraction, the SmA layers and self-assembly were formed in these ILCs. The ionic conductivities of the ILCs significantly increased in SmA phase due to unique facilitated ion transport pathways of lamellar ionic channels.
研究领域:
材料科学
·
化学
·
液晶
·
离子液体
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）