自清洁功能的高分子仿生表面研究取得新进展

Development of Bionic Polymer Surface with Self-cleaning Function

        徐坚(化学研究所 北京100080)

         仿生学;高分子仿生表面;荷叶;超疏水/自清洁功能

        Bionics;polymer bionic surface;lotus;superhydrophobicity/self-cleaning

        我们仿造有超疏水性质和自清洁功能荷叶表面的微米鄄纳米双重结构,通过分子设计和大分子在溶液及凝聚过程中分子形态的控制,采用一步法浇铸成膜制备出相应的高分子仿生表面,得到了可与荷叶相媲美的超疏水性质和荷叶所不具备的疏油特性,该表面具备自清洁功能和“自修复”功能。

        Bionics, an artificial imitation of natural products, has always been a forever dream in the fairy tale or scientific fiction when we were childhood and children live now. However, the development of science in molecular scale makes this dream of childhood and manhood realize today. Such a typical bionic surface, so called "Lotus-effect", is a symbol or a totem that scientists can develop one-step approach to prepare desired polymer surface and to control its microstructure or morphology at one’s pleasure. The bionic polymer surface is prepared by the formation of multi-molecular micelles of polypropylene-polymethylmethacrylate block copolymer(PP-b-PMMA) in N, N’-dimethylformamide selective solvent. Similar polymer surface is made by one-step casting method of poly (methyl methacrylate)(PMMA) and fluorine-terminated polyurethane (FPU) solution under ambient conditions. The biomimetic micro-nano binary structures, similar to lotus leaf microstructure, are formed on the polymer surfaces. Excellent surface properties are given for these bionic polymer surfaces.