(2 × 4)-Type tetra-PEG ion gels were prepared through a copper-free azide–alkyne cycloaddition reaction between azide-functionalized tetra-branched poly(ethylene glycol) and electron-deficient alkyne-functionalized tetra(ethylene glycol) in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. The thermal, mechanical, and electrochemical properties of the ion gels were characterized. The tensile tests showed that the reaction efficiency of the cross-linking was over 90%. The prepared ion gels exhibited high mechanical toughness and stretchability characteristic of tetra-PEG gels. The electrochemical window of the ion gels was the same as that of the ionic liquid inside the gel. The ionic conductivities of the ion gels with 30 and 50 wt% polymer concentrations were 8.9 and 1.4 × 10 −4 S cm −1 , respectively (25 °C, anhydrous conditions). (2 × 4)-Type tetra-PEG ion gels were prepared through a copper-free azide–alkyne cycloaddition reaction between tetra-branched poly(ethylene glycol) and linear tetra(ethylene glycol). The tensile tests showed that the reaction efficiency of the cross-linking was over 90%. The prepared ion gels exhibited high mechanical toughness and stretchability characteristic of tetra-PEG gels. The electrochemical window of the ion gels was the same as that of the ionic liquid inside the gel. The ionic conductivity of the ion gel (30 wt% polymer concentrations) was 8.9 × 10 −4 S cm −1 (25 °C, anhydrous conditions).

中文翻译：

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通过无铜叠氮化物-炔烃环加成制备（2×4）型四聚乙二醇离子凝胶

(2 × 4)-型四聚乙二醇离子凝胶是通过叠氮化物官能化四支化聚（乙二醇）和缺电子炔烃官能化四（乙二醇）在 1 中的无铜叠氮化物-炔烃环加成反应制备的。 -乙基-3-甲基咪唑鎓双（三氟甲基磺酰基）亚胺。表征了离子凝胶的热、机械和电化学性质。拉伸试验表明交联反应的反应效率在90%以上。制备的离子凝胶表现出四聚乙二醇凝胶的高机械韧性和拉伸性。离子凝胶的电化学窗口与凝胶内部的离子液体的电化学窗口相同。聚合物浓度为 30 和 50 重量％的离子凝胶的离子电导率分别为 8.9 和 1.4 × 10 -4 S cm -1 （25°C，无水条件）。(2 × 4)-型四-PEG 离子凝胶是通过四支化聚（乙二醇）和线性四（乙二醇）之间的无铜叠氮化物-炔烃环加成反应制备的。拉伸试验表明交联反应的反应效率在90%以上。制备的离子凝胶表现出四聚乙二醇凝胶的高机械韧性和拉伸性。离子凝胶的电化学窗口与凝胶内部的离子液体的电化学窗口相同。离子凝胶（30wt%聚合物浓度）的离子电导率为8.9×10 -4 S cm -1 （25℃，无水条件）。拉伸试验表明交联反应的反应效率在90%以上。制备的离子凝胶表现出四聚乙二醇凝胶的高机械韧性和拉伸性。离子凝胶的电化学窗口与凝胶内部的离子液体的电化学窗口相同。离子凝胶（30wt%聚合物浓度）的离子电导率为8.9×10 -4 S cm -1 （25℃，无水条件）。拉伸试验表明交联反应的反应效率在90%以上。制备的离子凝胶表现出四聚乙二醇凝胶的高机械韧性和拉伸性。离子凝胶的电化学窗口与凝胶内部的离子液体的电化学窗口相同。离子凝胶（30wt%聚合物浓度）的离子电导率为8.9×10 -4 S cm -1 （25℃，无水条件）。