Poly(ionic liquid)s with branched side chains: polymer design for breaking the conventional record of ionic conductivity
Poly(ionic liquid)s with branched side chains: polymer design for breaking the conventional record of ionic conductivity
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DOI：
10.1039/d0py01333a
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发表时间：
2021-02-07
影响因子：
4.6
通讯作者：
Ikeda, Taichi
中科院分区：
文献类型：
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作者：
Ikeda, Taichi
采用阳离子缩水甘油基三唑基聚合物（GTP）合成了具有非支化、二支化和三支化侧链的聚离子液体。在对阳离子GTP进行分析的基础上，讨论了侧链支化对GTP的玻璃化转变温度和离子电导率等物理性能的影响。证实了离子电导率随着侧链支化程度的增加而增加。尽管是一种高分子量聚合物（1.9 × 10（6）Da），具有三分支侧链的GTP在干燥条件下在25 ℃下表现出3.6 × 10（-5）M的高离子电导率，这高于常规聚（离子液体）由Shaplov、Marcilla和Mecerreyes提出（3.0 × 10（-5）M，在25 ℃，干燥条件下，分子量>10（5）Da）。从基于电极极化模型的分析，具有支链侧链的阳离子GTP的较高的离子电导率可以归因于它们在聚合物基质中的较高的导电离子迁移率。这些结果表明，侧链支化在突破聚（离子液体）的离子电导率的常规限制方面是有效的。
Poly(ionic liquid)s with non-branched, di-branched, and tri-branched side chains were synthesised using cationic glycidyl triazolyl polymers (GTPs). Based on the analyses of these cationic GTPs, the effects of side-chain branching on physical properties, such as glass transition temperature and ionic conductivity, were discussed. It was confirmed that the ionic conductivity increased with the degree of side-chain branching. Despite being a high-molecular-weight polymer (1.9 x 10(6) Da), GTP with tri-branched side chains exhibited a high ionic conductivity of 3.6 x 10(-5) M at 25 degrees C under dry conditions, which is higher than the benchmark value of the conventional poly(ionic liquid)s proposed by Shaplov, Marcilla, and Mecerreyes (3.0 x 10(-5) M at 25 degrees C, dry conditions, molecular weight >10(5) Da). From the analysis based on the electrode polarisation model, the higher ionic conductivity of cationic GTPs with branched side chains can be attributed to their higher conducting ion mobility in the polymer matrix. These results indicate that side-chain branching is effective in breaking the conventional limit of ionic conductivity of poly(ionic liquid)s.