共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
3.
4.
5.
离子液体应用研究进展 总被引:14,自引:2,他引:12
由于离子液体具有较低的熔点、良好的导电性和可以忽略的蒸汽压等优点,引起了科学界和工业界的广泛瞩目.随着研究的日益深入,室温离子液体已经被开发和应用到诸多领域.对室温离子液体应用的研究进展进行了综述,详细介绍了离子液体在电化学、化学反应、分离过程以及在新材料等方面的应用.并对该领域的研究前景作了展望. 相似文献
6.
7.
离子液体的应用研究进展 总被引:17,自引:0,他引:17
离子液体是在室温或室温附近下呈液态、具有离子特性的新型溶剂,具有超低蒸气压,也称为绿色溶剂。介绍了离子液体的历史发展、种类,论述了离子液体在化学反应、分离过程、电化学、高分子离子液体及其他领域中的应用。 相似文献
8.
9.
10.
绿色溶剂——离子液体及其应用 总被引:9,自引:0,他引:9
离子液体作为“绿色的、可设计性”溶剂越来越受到关注。本文介绍了离子液体种类、特性和制备,综述了离子液体在分离过程、电化学、化学反应及材料领域中的应用,展望了离子液体的应用前景。 相似文献
11.
以甲基丙烯酸甲酯(MMA)和1-乙烯基-3-丁基咪唑溴盐(VBIMBr)为单体,通过自由基溶液聚合制备了无规共聚物聚(甲基丙烯酸甲酯-1-乙烯基-3-丁基咪唑溴盐)[P(MMA-VBIMBr)],并以此聚合物为基体,离子液体1-丁基-3-甲基咪唑四氟硼酸盐(BMIMBF4)为增塑剂,制备了BMIMBF4/P(MMA-VBIMBr)凝胶型离子液体聚合物电解质,采用红外光谱(FTIR)、X射线衍射(XRD)、扫描电镜(SEM)、热重分析(TG)和电化学交流阻抗(EIS)等方法对聚合物和聚合物电解质的性质进行了研究。结果表明,聚合物电解质膜具有优良的热稳定性和机械强度;当BMIMBF4/P(MMA-VBIMBr)质量配比为2时,离子电导率高达2.77×10-3S/cm(20℃),且离子电导率随着温度的升高而迅速增加,电导率-温度曲线符合Arrhenius方程。 相似文献
12.
13.
Mingtao Li Li Yang Shaohua Fang Siming Dong Shin‐ichi Hirano Kazuhiro Tachibana 《Polymer International》2012,61(2):259-264
Polymerized ionic liquids (PILs) having guanidinium cations with different counter‐anions, such as PF6? and N(CF3SO2)2? (TFSI?), were synthesized by copolymerization of a guanidinium ionic liquid monomer with methyl acrylate followed by an anion exchange reaction. Furthermore, incorporating a guanidinium ionic liquid, LiTFSI salt and nano‐size SiO2, a quaternary gel polymer electrolyte based on one of the PILs as the polymer host was prepared. The quaternary gel polymer electrolyte was chemically stable even at a higher temperature of 80 °C in contact with the lithium anode. In particular, the electrolyte exhibited high lithium ion conductivity, wide electrochemical stability window and good lithium stripping/plating performance. Li/LiFePO4 batteries with the quaternary gel polymer electrolyte at 80 °C had capacities of 140 and 130 mA h g?1 respectively at 0.1 and 0.2 C current rates. Copyright © 2011 Society of Chemical Industry 相似文献
14.
《分离科学与技术》2012,47(11):1616-1626
In this study, a membrane prepared by gelling trihexyl(tetradecyl)phosphonium dicyanamide ionic liquid (IL) with poly(vinylidene fluoride-co-hexafluoropropylene) copolymer is tested for performance and stability in pervaporative separation of 1-butanol. Feed concentration and temperature affected separation performance mainly through plasticizing and swelling effects in the membrane which promoted liquid-like transport behavior. Microscale IL-in-polymer networks formed within the gel matrix where the neat IL possibly functioned as conventional liquid membrane. IL gelling has significantly improved the membrane operational lifetime to ~80 h, a significant improvement on the ~10 h shown by a simple supported IL membrane counterpart. The instability was consequent to polymer-IL incompatibility and so further investigations are underway to resolve this issue. 相似文献
15.
16.
Mehmet Isik Haritz Sardon David Mecerreyes 《International journal of molecular sciences》2014,15(7):11922-11940
Due to its abundance and a wide range of beneficial physical and chemical properties, cellulose has become very popular in order to produce materials for various applications. This review summarizes the recent advances in the development of new cellulose materials and technologies using ionic liquids. Dissolution of cellulose in ionic liquids has been used to develop new processing technologies, cellulose functionalization methods and new cellulose materials including blends, composites, fibers and ion gels. 相似文献
17.
18.
采用孔扩散模型, 模拟不同盐浓度和不同蛋白质初始浓度条件下,吸附牛血清白蛋白(BSA)的动态吸附曲线并获得孔扩散系数;考察了离子强度和溶质浓度对蛋白质在阴离子交换剂Q Sepharose FF中吸附动力学的影响.结果表明,蛋白质的孔扩散系数随初始浓度的增大而下降;在氯化钠浓度小于0.10 mol8226;L-1的范围内,蛋白质的孔扩散系数随着盐浓度的增加而增大,但当盐浓度增大到0.15 mol8226;L-1时又有所降低,表明存在着一个最佳的离子强度,使蛋白质的孔扩散系数最大. 相似文献
19.
Asheesh Kumar Raghunandan Sharma Chhatrasal Gayner Siddanathi Nageswara Rao Devendra P. Singh Malay K. Das Kamal K. Kar 《International Journal of Applied Glass Science》2017,8(1):97-104
The (AgBr)x(LiPO3)(1−x) (x=0.4 and 0.5) and [(AgI)x(AgBr)0.4−x](LiPO3)0.6 (x=0.1, 0.2, and 0.3) superionic electrolytes have been prepared by conventional melt quenching using a twin roller. These electrolytes are characterized by X-ray diffraction, SEM, and energy dispersive X-ray analysis (EDAX) for structural investigation. Electrical characterizations have been carried out by the AC impedance analysis. The conductivity of LiPO3 glassy system at room temperature is improved by doping with the silver bromide (AgBr)x(LiPO3)(1−x) and the mixture of silver iodide, silver bromide (AgI-AgBr-LiPO3 system) up to 10−5 and 10−3 Ω−1 cm−1, respectively (improvements by four or five orders of magnitude). The frequency response of ionic conductivity has been analyzed by universal dynamic response model (Jonscher's law) and AC conductivity data are fitted using the Jonscher's power law. The conductivity values obtained by the power law and impedance plots are comparable. The frequency exponent (n) has a value between 0 and 1. The AgI-AgBr-LiPO3 system shows the mixed alkali effect. Summerfield scaling master curve is temperature dependent, which may be due to the contribution of the both lithium and silver ions to ionic conduction. 相似文献
20.
V.V. Shevchenko A.V. Stryutsky N.S. Klymenko M.A. Gumenna A.A. Fomenko V.N. Bliznyuk V.V. Trachevsky V.V. Davydenko V.V. Tsukruk 《Polymer》2014
We report on synthesis of linear and hyperbranched protic and aprotic anionic oligomeric ionic liquids (OILs). α,ω-Dicarboxy- and α,ω-disulfooligo(ethylene oxide)s, α-carboxy- and α-sulfooligo(ethylene oxide monomethyl ether)s, and di[(α-carboxyoligo(ethylene oxide monomethyl ether)] were synthesized using reaction of oligo(ethylene oxide diol) (MW 1000) and its monomethyl ether (MW 750) with phthalic-, 2-sulfobenzoic anhydride and pyromellitic dianhydride. Di- and mono-substituted anionic OILs were prepared by neutralizing these compounds with N-methylimidazole. Aprotic anionic OILs were synthesized by reaction of sodium salts of the prepared oligomeric di- and monoacids with 1,3-dimethyl imidazolium iodide. Hyperbranched protic and aprotic anionic OILs were prepared in a similar manner. The structure, thermal stability and ionic conductivity of the synthesized compounds in the range of 20–120 °C in anhydrous conditions is governed by the molecular architecture of the oligomeric chains and the type of the cation/anion moieties. OILs under study are amorphous at room temperature but some protic and aprotic linear-chain OILs prone to form a low melting temperature crystalline phase. The ionic conductivity of the synthesized OILs can be varied in broad range reaching 10−3 S/cm value at temperatures over 100 °C under anhydrous conditions. 相似文献