纳米粒子超疏水改性聚偏氟乙烯膜的研究  

Superhydrophobic modification of polyvinylidene fluride (PVDF) membrane with nanoparticles

作　　者：张婧[1,2,3] 李保安[1,2,3] 王琴[1,2,3] 王世昌[1,3] 

机构地区：[1]天津大学化工学院化学工程研究所,天津300072 [2]化学工程联合国家重点实验室,天津300072 [3]天津市膜科学与海水淡化技术重点实验室,天津300072

出　　处：《膜科学与技术》2014年第1期24-28,38,共6页Membrane Science and Technology

基　　金：天津市科技支撑计划项目(12ZCZDSF02200)

摘　　要：利用喷涂沉淀法对聚偏氟乙烯(PVDF)膜进行表面改性,考察了喷涂液中纳米粒子(NP)的浓度和纳米粒子与胶粘剂(PDMS)的质量比对聚偏氟乙烯改性膜性能的影响.测定了改性前后聚偏氟乙烯膜的表面接触角以及膜的结构变化,并研究了膜的抗润湿和抗污染性能.结果表明,当喷涂液中纳米粒子的质量浓度为1%,纳米粒子与胶粘剂的质量比为4:5时,膜表面接触角从102°提高到156°.在直接接触式膜蒸馏实验中,改性膜的抗润湿性能和抗污染性能均较改性前有较大的提高.The polyvinylidene fluride （PVDF） membrane was modified by spray--deposition. The effects of the concentration of nanoparticles and the mass ratio of nanoparticles to adhesive in the spraying solutionon the modified membranes properties were studied. The properties of the membranes modified under different conditions, such as the membrane surface contact angle and surface structure, were analyzed. The results showed that the largest contact angle of the modified membrane was obtained when nanoparticles mass content was 1 ~//00 and the nanoparticles to adhesive mass ratio was 4 ： 5 in the spraying solution. The direct contact membrane distillation （DCMD） test indicated that the properties of wetting resistance and anti-fouling of the modified membrane were improved compared with the original one.

关 键 词：聚偏氟乙烯 喷涂沉淀 超疏水改性 接触角 膜蒸馏 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]