High-Performance Double-Network Ion Gels with Fast Thermal Healing Capability via Dynamic Covalent Bonds
High-Performance Double-Network Ion Gels with Fast Thermal Healing Capability via Dynamic Covalent Bonds
复制标题
通过动态共价键具有快速热修复能力的高性能双网络离子凝胶
DOI：
10.1021/acs.chemmater.8b03104
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发表时间：
2018-11-13
影响因子：
8.6
通讯作者：
Fan, Xinghe
中科院分区：
文献类型：
--
作者：
Tang, Zhehao;Lyu, Xiaolin;Fan, Xinghe
采用一锅法制备了含有80wt%离子液体(IL)的化学交联聚(甲基丙烯酸呋喃甲酯-甲基丙烯酸甲酯)(P(FMA-co-MMA))和物理交联的聚偏氟乙烯-六氟丙烯(P(VDF-co-HFP))网络离子凝胶。该离子凝胶具有优异的机械强度和相当大的离子导电性，可作为固体凝胶电解质。通过调整P(FMA-co-MMA)/P(VDF-co-HFP)的质量比和交联剂的含量，可得到强度较高的DN型离子凝胶(断裂拉应力为660kPa，应变为268%；断裂压应力为17 MPa，应变为85%)。高的机械强度归因于化学/物理互穿网络。刚性的化学交联的P(FMA-co-MMA)网络耗散了大部分的加载能量，而延展性的物理交联的P(VDF-co-HFP)网络为整个凝胶提供了延伸性。更重要的是，P(FMA-co-M.
A tough double-network (DN) ion gel composed of chemically cross-linked poly(furfuryl methacrylate-co-methyl methacrylate) (P(FMA-co-MMA)) and physically cross-linked poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-co-HFP)) networks with 80 wt % of ionic liquid (IL) was fabricated via a one-pot method. This ion gel exhibits excellent mechanical strength and considerable ionic conductivity, which can be used as a solid gel electrolyte. Upon an adjustment of the weight ratio of P(FMA-co-MMA) to P(VDF-co-HFP) and the content of the cross-linker, remarkably robust DN ion gel (failure tensile stress 660 kPa, strain 268%; failure compressive stress 17 MPa, strain 85%) was obtained. The high mechanical strength is attributed to the chemical/physical interpenetrating networks. The rigid chemically cross-linked P(FMA-co-MMA) network dissipates most of the loading energy, and the ductile physically cross-linked P(VDF-co-HFP) network provides stretchability for the whole gel. More importantly, the P(FMA-co-M...