二氧化钛/聚氨酯超疏水涂层的制备及性能  

Preparation and Properties of Titanium Oxide / Polyurethane Superhydrophobic Coating

作　　者：潘洪波[1] 汪存东[1] 刘建新[1] 喻华兵[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《高分子材料科学与工程》2015年第5期62-65,共4页Polymer Materials Science & Engineering

基　　金：中北大学研究生科技基金项目(20141136);山西省青年科技研究基金项目(2013021012-4)

摘　　要：以纳米二氧化钛(Ti O2)和有机硅改性聚氨酯为原料,乙酸乙酯为分散剂,通过简单的喷涂法,制备了Ti O2/PU微-纳米复合结构的超疏水涂层。涂层表面水的静态接触角为156°,滚动角为3°。经紫外光照射后,涂层表面变为超亲水表面,接触角为3°。用扫描电镜对涂层表面形貌进行了表征,研究了Ti O2与PU的质量比、光照时间对涂层表面润湿性转变的影响。结果表明,涂层表面与荷叶表面有相似的微-纳米结构,当Ti O2与PU的质量比在3∶5至4∶5之间,光照时间为3~4 h时,涂层表面润湿性转变明显。A nano-titanium oxide( Ti O2) /polyurethane( PU) micro-nano composite superhydrophobic coating was prepared by a simple spraying process. In this process,Ti O2 and organosilicon-modified PU were used as raw materials,and ethyl acetate was used as dispersing agent. The water contact angle( CA) and sliding angel( SA) of the coating surface are 156° and 3°,respectively. After UV irradiation,the coating surface becomes a superhydrophilic surface,the CA is 3°. The coating surface morphology was characterized via scanning electron microscopy. The influence of the mass ratio of Ti O2 and PU,and irradiation time on the coating surface wettability reversal was studied. The results show that the coating surface has the similar micro-nanostructure as the lotus leaf surface. When the mass ratio of Ti O2 and PU is between 3∶ 5 and 4∶ 5,and the irradiation time is longer than 3 h,the coating surface wettability reverses obviously.

关 键 词：二氧化钛 润湿性 聚氨酯 超疏水 超亲水 

分 类 号：TQ630.1[化学工程—精细化工]