Improvement in Comprehensive Properties of PolyMethyl Methacrylate-Based Gel Polymer Electrolyte by a Core-Shell PolyMethyl Methacrylate-Grafted Ordered Mesoporous SilicaReportar como inadecuado




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Journal of NanomaterialsVolume 2012 2012, Article ID 457967, 10 pages

Research ArticleCollege of Chemical Engineering and Materials Science, Zhejiang University of Technology, No. 18, Chaowang Road, 6th Zone, Chaohui, Hangzhou 310014, China

Received 2 March 2011; Accepted 7 April 2011

Academic Editor: Sherine Obare

Copyright © 2012 Lixin Xu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel strategy, herein, is demonstrated for improving comprehensive properties of poly methyl methacrylatePMMA-based gel polymer electrolyte GPE with a core-shell PMMA-grafted ordered mesoporous silica OMS-g-PMMA. The OMS-g-PMMA was synthesized by surface-initiated atom transfer radical polymerization of methyl methacrylate from the exterior surface of OMS particle. A series of PMMA-based GPE membrances, filled with the OMS-g-PMMA of different contents, were further prepared by solution casting technique. The OMS-g-PMMA was confirmed to possess regular core-shell structure, in which a PMMA shell is chemically grafted to the exterior surface of silica core remaining intact mesoporous characteristics. Compared to the bare OMS, the OMS-g-PMMA is found to more effectively improve the comprehensive properties of PMMA-based GPE including ionic conductivity, thermal stability, and mechanical properties as well. For the PMMA-based GPE filled with 15 phr OMS-g-PMMA, the ionic conductivity at 25°C reaches 1.59 × 10

 S·cm

, which is higher by nearly two orders than that of the corresponding filler-free parent GPE. Meanwhile, the tensile strength and Young-s modulus increase by 2.39 and 2.41 times, respectively, with an improvement in glass-transition temperature 𝑇𝑔 about 10°C. The excellent comprehensive properties make the PMMA-based GPE filled with OMS-g-PMMA as potential candidate for electrochemical devices.





Autor: Lixin Xu, Feng Xu, Feng Chen, Jintao Yang, and Mingqiang Zhong

Fuente: https://www.hindawi.com/



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