膜科学与技术

等离子体引发气相接枝乙烯基单体对聚乙烯薄膜的表面改性

作者：

解林坤，杜官本，代沁伶，柴希娟

单位：西南林业大学云南省木材胶黏剂及胶合制品重点实验室，昆明 650224

关键词：等离子体；LDPE薄膜；乙烯基单体；气相接枝

出版年,卷(期):页码： 2015,35(6):28-32

摘要：

分别以AA和MAA为乙烯基单体，用氧等离子体活化LDPE薄膜，采用气相接枝的方法对薄膜进行了表面改性，并通过静态水接触角、粘结性测试、X射线光电子能谱、扫描电镜对改性前后薄膜的表面性能进行表征和分析。实验结果表明，接枝AA和MAA后，水接触角均随着接枝时间的增加逐渐减小，剥离强度随着接枝时间呈现逐渐增大的趋势。薄膜表面引入了C-O、C=O/O-C-O和O=C-O等含氧极性官能团，出现了大小不同的颗粒状突起物。

The low density polyethylene (LDPE) film surface was activated with oxygen plasma and induced vapor-phase grafting of vinyl monomers, which were acrylic acid (AA) and methacrylic acid (MAA) respectively. The film surface properties of before and after modification were characterized by static water contact angle, bond performance, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy(SEM ). The results showed that the water contact angle decreased and the peel strength increased with the increase of the time for vapor-phase grafting AA or MAA onto the LDPE film surface. The film surface formed some containing oxygen functional groups, such as C-O, C=O/O-C-O and O=C-O. Furthermore, the modified LDPE film surface appeared some granular substance in variety of size.

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