Easy preparation and useful character of organogel electrolytes based on low molecular weight gelator
Easy preparation and useful character of organogel electrolytes based on low molecular weight gelator
复制标题
DOI：
10.1021/cm980528r
复制
发表时间：
1999-03-01
影响因子：
8.6
通讯作者：
Shirai, H
中科院分区：
文献类型：
--
作者：
Hanabusa, K;Hiratsuka, K;Shirai, H
以N-羧基-L-异亮氨基十八烷为极性溶剂的低相对分子质量凝胶剂，将支持电解质与DMF、DMSO、PC等极性溶剂进行物理凝胶化反应，制备了有机凝胶电解质。所制备的有机凝胶电解质的离子电导率随凝胶剂浓度的增加而略有下降，而凝胶强度随浓度的增加而急剧增加。由DMF制备的有机凝胶表现出相对较高的离子导电性，这是由于低粘度DMF中载流子离子的高迁移率所致。有机凝胶电解质离子电导率的Arrhenius图表明，支持电解质在有机凝胶中的行为与在各向同性溶液中的行为基本相似，支持电解质的离子迁移率几乎不受凝胶剂分子的影响。在有机凝胶电解质中实现高电导率和高凝胶强度的最佳支持电解质浓度为0.05~0.2M。在有机凝胶电解质中加入聚乙二醇组分可以在不降低离子电导率的情况下显著提高凝胶强度。
Using N-carbobenzyloxy-L-isoleucylaminooctadecane as a low molecular weight gelator for polar solvents, organogel electrolytes were prepared from supporting electrolyte and a polar solvent such as DMF, DMSO, and PC by physical gelation. The ionic conductivity of the prepared organogel electrolytes decreased very slightly with increasing concentration of gelator, while the gel strength drastically increased with increasing concentration. The organogel prepared from DMF exhibited relatively high ionic conductivity, interpreted due to the high mobility of carrier ions in the low-viscosity DMF. Arrhenius plots of ionic conductivities of organogel electrolytes indicate that the behavior of supporting electrolytes in the organogels is essentially similar to that in the isotropic solution, and the ionic mobility of supporting electrolytes is scarcely affected by the gelator molecules. The optimal concentration of supporting electrolytes in organogel electrolytes to achieve both high conductivity and high gel strength was 0.05-0.2 M. The addition of PEG to organogel electrolytes markedly raised the gel strength without decreasing ionic conductivity.