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为了改变低密度聚乙烯(LDPE)薄膜表面固有的惰性及疏水性,赋予其表面“永久”的亲水性能。以丙烯酸为单体,采用射频辉光放电等离子体聚合的方法对其进行了表面修饰,并用XPS、FTIR-ATR和SEM对改性前后薄膜的表面性能进行了分析。结果表明:聚合处理后薄膜表面O元素的含量明显增加,形成了C—O、C=O、COOH等含氧极性官能团,薄膜表面出现了大小不同的颗粒状丙烯酸聚合物。
To change the inherent inertness and hydrophobicity of low density polyethylene (LDPE) film surfaces, give it a “permanent” hydrophilic surface. Surface modification was carried out by RF glow discharge plasma polymerization using acrylic acid as monomer. The surface properties of the films before and after modification were analyzed by XPS, FTIR-ATR and SEM. The results showed that the content of O element in the surface of the film increased obviously after the polymerization, and the oxygen-containing polar functional groups such as C-O, C = O and COOH were formed. The granular acrylic polymer with different sizes appeared on the surface of the film.