摘要
研究用两亲性嵌段共聚物和纳米二氧化硅制备超疏水表面.采用可逆加成-断裂链转移聚合法(RAFT)合成了两亲性嵌段共聚物聚甲基丙烯酸叔丁酯-b-聚(4-乙烯基吡啶),用红外光谱,核磁共振,凝胶渗透色谱对聚合物进行了表征,将嵌段共聚物接枝到纳米二氧化硅上,形成一个有机无机杂化材料,通过调节pH值来控制杂化材料在水中的聚集行为,构筑了微纳双重结构的粗糙表面.该表面为超疏水表面,对水接触角达151°,滚动角<5°.扫描电镜分析表面形貌表明:具有微纳双重结构的类似荷叶表面是形成超疏水的根本原因.
The present study demonstrates a superhydrophobic surface prepared by using amphiphilic block copolymers and nano silica. Amphiphilic block copolymer poly （tert-butyl methacrylate-b-4-vinylpyridine） was synthesized through RAFT （reversible addition-fragmentation chain transfer） polymerization. IR, ^1H NMR spectrum and GPC were utilized to characterize the chemical structures of the copolymer. The ＂grafting＂ approach was used to graft the amphiphilic block copolymer brushes of Poly （tert-butyl methacrylate-block-4-vinylpyridine） onto silica nanopartieles, and an organic-inorganic hybrid materials was formed, and then the aggregates of hybrid materials were controlled by regulating the pH value to construct a hierarchically textured coating on silicon wafer. The surface was a superhydrophobic surface, the contact angle on the suface of coating was 151°,and the sliding angle was below 5°.SEM analysis has shown that micro-nano dual structure is the root causes of the formation of the superhydrophobic surface.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第2期56-59,共4页
Journal of Hunan University:Natural Sciences
基金
湖南省科技厅计划处一般项目(2007FJ3020)
