POSS基含氟醚链偶氮苯聚合物的制备及其油润湿性光响应可逆转换的研究

项目名称： POSS基含氟醚链偶氮苯聚合物的制备及其油润湿性光响应可逆转换的研究

项目编号： No.51203021

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 有机高分子材料学科

项目作者： 高宇

作者单位： 东华大学

项目金额： 25万元

中文摘要： 环境响应润湿性智能表面具有广泛的应用前景。但油的表面张力较小，使疏油表面较疏水表面制备困难，制约了油润湿性环境响应智能表面的发展。长氟碳链化合物表面自由能极低，适于该类智能表面的制备，但存在难生物降解和环境不友好等缺点。用于高级润滑剂的氟醚类聚合物，也具有较低表面自由能，且易被生物降解，有望开发成为长氟碳链化合物的替代品。笼状结构的多面体低聚倍半硅氧烷（POSS）具有天然纳米尺度，能提高聚合物热稳定性及力学性能，并赋予表面特殊形貌，成为材料领域研究热点。本项目拟合成含氟醚链偶氮苯化合物，制备新型POSS基含氟偶氮苯聚合物，研究物质制备-结构-性质之间内在联系。所得聚合物在不同光照下，偶氮苯基团发生光致顺反异构转换，与之相连的脂肪链、氟醚链交替伸向表面，改变表面自由能，实现亲油-疏油可逆转换；POSS基团微相分离构建多尺度微纳表面结构，增强响应强度，实现超亲油-超疏油可逆转换。

中文关键词： 光致异构；可转换润湿性；偶氮苯化合物；倍半硅氧烷；全氟醚链

英文摘要： Smart surfaces with reversible wettability transitions under external stimuli have recently generated extensive interest due to their wide applicability in various fields.The difficulty to fabricate oleophobic surface resulted from the low surface tension of oily liquids limits the study of switchable oil wettability. Long chain fluorocarbons with low surface free energy are suitable to be used in preparing the switchable oil wettability surface. However, there are increasing evidences for bioaccumulation and/or toxicity of the long chain perfluoroalkyl and its derivatives. Fluoroether-containing compounds seem to be the promising substitute for long-chain fluorocarbons due to their excellent physical and chemical properties such as high chemical resistance, high lubricating ability, low surface energy and low toxicity. In the past decades, polyhedral oligomeric silsesquioxane (POSS)-incorporated polymer materials have attracted increasing interest due to their remarkable performance on the polymer matrix such as higher usage temperature, improved mechanical property and special topography formation than their pristine counterpart. In this study, fluoroether-containing azobenzene compounds will be synthesized to prepare the novel POSS-based azobenzene polymer. The synthesized POSS-based polymer containing azoben

英文关键词： photoisomerization；switchable wettability；azobenzene；POSS；perfluoropolyether chain