CPP薄膜表面的氟等离子体聚合及其亲水性研究

Study on the Plasma Polymerization of CTFE and the Hydrophility of CPP Film

通过等离子体引发聚合的方法,使三氟氯乙烯(CTFE)在CPP(流延聚丙烯)薄膜表面发生聚合反应。分别对未处理的CPP薄膜和经等离子体聚合处理的CPP薄膜进行质量分析、扫描电镜和能谱表征,证实在CPP薄膜表面生成了含氟聚合物。在一定范围内考察了聚合时间、板极电压和压力对三氟氯乙烯沉积速率的影响,由于等离子体刻蚀作用与聚合反应同时存在,沉积速率与3种过程因素均未呈现线性关系。氟聚合物层使薄膜表面极性减弱,导致表面能中极性分量所占的比例减少,色散分量的比例增加,表面能降低,水和乙二醇在薄膜表面的接触角增大,CPP薄膜的表面亲水性减弱。

The polymerization of chlorotrifluor ethylene （CTFE） on the CPP film by plasma induced polymerization was studied. The untreated CPP film and the deposited CPP film were characterised by SEM, EDS and weight analytical method. It was confirmed that some fluropolymer deposited onto the CPP film. The effect of reaction time, power, and pressure on the deposited rate was researched in a certain range. The deposition rate during the three factors showed no linear relationship because of the interaction of plasma etching and polymerization. The fluropolymer induced the decrease of the film surface energy and the contact angle against water and glycol. The dispersion part of the surface energy increased. It was shown that the hydrophilicity of the CPP film was weakened.