化学浴沉积法制备防污自洁聚偏氟乙烯膜

基于"荷叶效应"原理,利用聚偏氟乙烯(PVDF)涂膜构筑微米结构,氧等离子体诱导化学沉积法构筑纳米结构。采用接触角测量仪、原子力显微镜及X光电子能谱仪等研究了PVDF膜表面的微结构及化学组成与疏水性能的关系。结果显示,PVDF溶液涂膜后可形成直径8μm的微球,甲基三氯硅烷修饰的PVDF膜与水的接触角为157°;二甲基二氯硅烷/甲基三氯硅烷混合液修饰的PVDF膜的表面接触角为155°,滚动角2°;集灰实验证明,两种修饰方法制备的PVDF膜均具有良好的防污自洁性能。

Preparation of PVDF Film with Self-Cleaning Property by Chemical Bath Deposition

Based on the "lotus effect" principle,polyvinylidene fluoride (PVDF) solution was used to constract the microstructures,and the nanostructures were fabricated by plasma enhancing chemical bath deposition.The structural morphology and hydrophobicity were explored by contact angle measuring meter,atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS).The experimental results show that PVDF can form smooth microreliefs with diameter about 8 μm on the coating surface.The contact angle on PVDF surface deposited with methyltrichlorosilane was 157°.The contact angle and sliding angle on PVDF surface deposited with dimethyldichlorosilane/methyltrichlorosilane were 155°and 2°,respectively.Self-cleaning test shows that the PVDF film prepared by this two deposited methods is all having excellent self-cleaning property.