仿箬叶聚合物表面模板法制备与润湿性能研究  

Replication by Template Methods and Wetting Properties of Indocalamus-leaf-like Polymer Surfaces

作　　者：翁灿[1,2] 杨冬娇 王飞[1,2] 周宏慧[3] WENG Can YANG Dongjiao WANG Fei ZHOU Honghui(State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China Zhuzhou Times New Material Technology Co. , Ltd. , Zhuzhou 412007, China)

机构地区：[1]中南大学高性能复杂制造国家重点实验室,长沙410083 [2]中南大学机电工程学院,长沙410083 [3]株洲时代新材料科技股份有限公司,株洲412007

出　　处：《农业机械学报》2017年第10期424-428,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金青年科学基金项目(51305465);中南大学研究生自主探索创新项目(2016zzts309)

摘　　要：从师法自然出发,以静态接触角高达140°的箬叶下表面为仿生对象,使用2种模板法制备具有箬叶下表面微纳复合结构的聚合物仿生表面。采用扫描电镜观测聚合物仿生表面的微观形貌,借助接触角测量仪分析仿生表面的润湿性能。以箬叶下表面为模板,采用聚二甲基硅氧烷(PDMS)二次复形方法获得仿箬叶下表面,仅实现微乳突结构的部分复形,而大多数纳米片层结构缺失,其静态接触角与PDMS本征接触角相比只提高了7°左右。采用电铸与注射成型相结合的方法获得的仿箬叶聚丙烯(PP)表面,可基本实现微纳复合结构的复形,其静态接触角与PP本征接触角相比提高了50°以上,进一步采用低表面能的氟硅烷修饰注射成型仿箬叶PP表面,其静态接触角与PP本征接触角相比提高了70°左右,达到了133°±2°。但2种模板法成型的仿生聚合物表面均未能较好保留箬叶的动态润湿性能。实验结果表明,通过电铸-注射法构筑仿箬叶表面的微纳复合结构、在粗糙表面上修饰低表面能物质的双重途径可用于实现仿生疏水表面高效低成本的制备。Learn from the nature, the undersurface of indocalamus leaf with water contact angle of 140° was taken as the mimetic object. Two template methods were ehosen to fabricate polymer biomimetic surfaces which bad the similar micro-nano hierarchical structure characteristics of the indoealamus leaf. The morphology and surface wettability of polymer biomimetic surfaces were investigated by scanning electron microscope and contact angle meter, respectively. The undersurface of indocalamus leaf was then used as a template. Only some replicated micro-papilla were found on the PDMS biomimetic surface fabricated by a double replica method, missing most nano-lamellar structures. The water contact angle of PDMS biomimetic surfaee was only increased by 7°, compared with that of PDMS flat surface. The PP biomimetic surfaces were fabricated by injection molding combined with eleetroforming process. Results showed that the most micro-nano hierarchical structures of indoealamus leaf were successfully transferred onto the PP surfaces. Compared with PP flat surface, the was increased by 50°. The PP biomimetic surface was then energy. Compared with PP fiat surface, the water contact increased by 70°, reaching 133°±2°. But the polymer template methods can not reserve the dynamic wettability of water contact angle of PP biomimetic surface modified by fluoroalkylsilane with low surface angle of modified PP biomimetic surface was biomimetic surfaces fabricated by these two natural indocalamus leaf. Results showed that the injection molding combined with electroforming and modification by fluorochemicals could be used to fabricate biomimetic hydrophobic surfaces with high efficiency and low cost.

关 键 词：疏水性 箬叶 微纳结构 模板法 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]