相转化结合溶胶凝胶法制备PVDF/SiO_(2)杂化微孔膜  

Preparation of PVDF SiO_(2) Hybrid Microporous Membrane by Phase Inversion Combined with Sol-Gel Method

作　　者：马文中[1] 王诗婷 曹峥[1] 杨海存[1] 刘春林[1] 龚方红 MA Wenzhong;WANG Shiting;CAO Zheng;YANG Haicun;LIU Chunlin;GONG Fanghong(Jiangsu Key Laboratory of Environmentally Friendly Polymer Materials,Changzhou University,Changzhou 213164,China;School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]江苏省环境友好高分子材料重点实验室(常州大学),江苏常州213164 [2]常州大学材料科学与工程学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2021年第5期25-34,共10页Journal of Changzhou University：Natural Science Edition

基　　金：江苏省高等学校自然科学研究资助项目(18KJA430005)。

摘　　要：采用溶胶凝胶结合相转化法制备PVDF/SiO_(2)杂化微孔膜,通过TEOS溶胶凝胶原位生成SiO_(2)实现其纳米分散,同时与直接添加纳米SiO_(2)方式进行对比。在铸膜液体系热力学相图绘制基础上,选取最佳热力学制膜条件,结合膜结构和形貌分析、热分析和拉伸性能分析。结果表明,TEOS的成核作用更好,其凝胶过程会促进微孔的形成,得到双连续的蜂窝状微孔结构。当PVDF质量分数为15%,TEOS质量分数为1.0%时能得到最优的复合膜,其耐热性及力学性能得到提高,拉伸强度可达到12.3 MPa,断裂伸长率为245%。The PVDF/SiO_(2) hybrid microporous membrane was prepared by sol-gel combined phase inversion method.The in-situ generation of TEOS sol-gel generated SiO_(2) to achieve its nano-dispersion,and at the same time,it was compared with the direct addition of nano-SiO_(2).Based on the drawing of the thermodynamic phase diagram of the film casting liquid system,the best thermodynamic film forming conditions are selected,combined with the analysis of film structure and morphology,thermal analysis and tensile performance analysis.The results show that TEOS has better nucleation,and its gelation process will promote the formation of micropores,resulting in a bi-continuous honeycomb micropore structure.When the content of PVDF is 15%weight score and the amount of TEOS added is 1.0%weight score,the optimal composite film can be obtained,its heat resistance and mechanical properties are improved,the tensile strength can reach 12.3 MPa,and the elongation at break is 245%.

关 键 词：PVDF/SiO_(2) 杂化微孔膜 溶胶凝胶法 蜂窝状微孔结构 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]