Effects of Molecular Configuration of Copolymer Gelators on Performance of Polymer Gel Electrolytes
발표자
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초록
내용
In this study, we investigate the correlation between the molecular configuration of copolymer gelators and the performance of the resulting ion gels by comparing two types of copolymers, poly(ethyl methacrylate-ran-styrene) (PEMA-r-PS) and disordered poly(ethyl methacrylate-block-styrene) (PEMA-b-PS). To ensure an accurate comparison, other factors related to gel properties such as molecular weight, PS fraction, and gel composition were fixed. When blended with 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide,both gelators based ion gels showed similar ionic conductivities. On the other hand, the PEMA-r-PS-based gel exhibited a higher elastic modulus (~220 kPa) than that (~103 kPa) of the PEMA-b-PS-based gel. To reveal the origin of the higher elastic modulus of PEMA-r-PS based gel, we studied the structures of ion gels using small angle X-ray scattering (SAXS) experiments. Moreover,we demonstrated PEMA-r-PS-based gels to electrochromic devices (ECDs) and strain sensors.