Preparation and characteristics of natural rubber/poly(ethylene oxide) salt hybrid mixtures as novel polymer electrolytes
Preparation and characteristics of natural rubber/poly(ethylene oxide) salt hybrid mixtures as novel polymer electrolytes
复制标题
新型聚合物电解质天然橡胶/聚环氧乙烷盐杂化混合物的制备及性能
DOI：
10.1016/s0032-3861(00)00277-9
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发表时间：
2000
期刊：
影响因子：
4.6
通讯作者：
H. Ohno
中科院分区：
文献类型：
--
作者：
M. Yoshizawa;Edy Marwanta;H. Ohno
将分子量为1000的含有苯磺酸锂（LiBs） （PEO1000/LiBs）的聚环氧乙烷（PEO） （PEO1000/LiBs）、链两端均含有苯磺酸基团的PEO衍生物（PEO1000 - （BSLi)2）或1-乙基-2,3-二甲基咪唑溴（ImB））与天然橡胶（NR）共混。离子电导率由交流阻抗值测定。在50℃时，NR与PEO1000/LiBs （40wt%）混合物的离子电导率约为10−6Scm−1；这种混合物保留了橡胶的物理特性。在NR含量为10wt%时，在50℃下，NR/PEO1000/LiBs混合物的离子电导率为2.7×10−5S cm−1，约为大块PEO/LiBs混合物的10倍。对于NR和PEO1000 - (BSLi)2的混合物，混合后的离子电导率没有改善。在NR含量为10wt%时，NR与ImB混合物的离子电导率比散装PEO1000 - (BSLi)2高约10倍。我们提出，当加入含有单盐的离子导电基质时，混合物的离子电导率增加。另一方面，NR/PEO衍生物的DSC曲线显示出基于分离组分的两个tg，表明PEO衍生物在NR相中存在相分离。
Poly(ethylene oxide) (PEO) of molecular weight 1000 (PEO1000) containing lithium benzenesulfonate (LiBs) (PEO1000/LiBs), PEO derivatives having benzenesulfonate groups on both chain ends (PEO1000–(BSLi)2), or 1-ethyl-2,3-dimethylimidazolium bromide (ImB), were each blended with natural rubber (NR). The ionic conductivity was measured from AC impedance values. The ionic conductivity of the mixture of NR and PEO1000/LiBs (40wt%) was about 10−6Scm−1at 50°C; this mixture retained rubbery physical characteristics. At NR content of 10wt%, the ionic conductivity of the mixture (NR/PEO1000/LiBs) was 2.7×10−5S cm−1at 50°C, approximately 10 times higher than that of the bulk PEO/LiBs mixture. For mixtures of NR and PEO1000–(BSLi)2, no improvement in ionic conductivity by mixing was found. The ionic conductivity of the mixture of NR and ImB was about 10 times higher than for the bulk of PEO1000–(BSLi)2at a NR content of 10wt%. We propose that the ionic conductivity of the mixture increases when an ion conducting matrix containing simple salt is added. On the other hand, the DSC curve for NR/PEO derivatives showed two Tgs based on the separate components, suggesting phase separation of the PEO derivative in the NR phase.