PVDF涂层纺织品表面防污自洁功能改性

Functional modification of surface anti-contamination and self-cleaning of textile coated by PVDF

采用低温等离子体处理和紫外线引发接枝相结合的方法,制备具有防污自洁功能的建筑膜材。首先应用氧气等离子体对PVDF薄膜进行预处理,探索处理时间对表面疏水性能及表面形态的影响。然后对预处理的薄膜进行紫外线引发接枝改性处理,通过探索接枝时间、引发剂质量分数和单体质量分数对表层膜接枝率和表面疏水性能的影响,构筑出具有防污自洁功能的建筑膜材表层。结果表明:改性后的膜材表面接触角可达150°,滚动角小于5°;集灰试验证实防污自洁效果良好。

For preparation of an architecture membrane with anti-contamination and self-cleaning functional properties,a method combining low temperature plasma treatment and UV-induced photografting was used.Firstly,the PVDF films were treated by oxygen plasma,and effects of treating time on surface hydrophobic property and surface morphology were studied.Then the treated films were modified by UV-induced photografting.The effect of the amount of initiator and concentration of monomer on the grafting percentage and hydrophobic property was investigated,and an architecture membrane with anti-contamination and self-cleaning was thus obtained.The result showed that the contact angle of the surface treated by the method was 150° and the dynamic contact angle was lower than 5°.According to the dust collecting experiment,the surface of the membrane has good anti-contamination and self-cleaning functions.