利用室温等离子体预处理和紫外光引发接枝聚合构造聚丙烯超疏水表面研究

The Study of Ultrahydrophobic Polypropylene Surface Prepared by Room Temperature Plasma and UV-photografting Polymerization

采用紫外光引发自由基聚合液相接枝的方法,将甲基丙烯酸十二氟庚酯(G04)接枝聚合到使用室温等离子体预处理的聚丙烯(PP)片材表面,成功构建水接触角大于150°的超疏水表面。通过FTIR表征显示含氟聚合物以化学键的方式接枝在PP片材表面上。考察实验条件发现增大引发剂浓度、增加单体浓度以及提高反应温度均有利于提高表面接枝率,同时发现使用等离子体刻蚀的方法可以进一步提高表面接枝率。对接枝PP表面进行金相显微镜观察和水接触角(WCA)测量等表征,发现接枝PP表面形成了包括含氟聚合物的粗糙表面结构,水接触角随接枝率的增加而逐渐增大至150°以上。

Ultrahydrophobic surface of polypropylene was successfully prepared by UV-photografting polymerization of dodecafluoroheptyl methacrylate（G04）on neat PP sheet surface which was etched by room temperature plasma.There-fore,the ultrahigh water contact angle（〉150°）was obtained.The chemical structure of fluoropolymer was analyzed by FTIR and the chemical grafting structure was also confirmed.The influences on grafting yield were investigated indetail by changing the reaction temperature,monomer and photoinitiator concentrations. Moreover,it was found that plasma etching had some benefits on grafting yield. Rough superficial layer of fluoropolymer were characterized by metallurgical microscope, on which the water contact angle increased to 150° above.