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采用常压等离子体表面处理聚丙烯薄膜,通过接触角考察氩气、氧气及处理时间、放电电压对聚丙烯表面亲水性的影响。同时比较不同条件下处理的聚丙烯薄膜接触角憎水性恢复现象。研究发现:聚丙烯薄膜表面经常压等离子体处理后,接触角显著下降,氧气较氩气条件下更低;随放电电压增高,处理时间延长,接触角呈下降趋势,最终稳定于一极小值;在氧气氛围中处理时间的延长有利于减轻接触角恢复程度,从而可获得较高的、稳定的亲水性聚丙烯薄膜。结果表明:常压等离子体是聚合物表面亲水化改性的简单有效的处理技术。
Polypropylene film was treated by atmospheric pressure plasma. The contact angle was used to investigate the influence of argon, oxygen, treatment time and discharge voltage on the hydrophilicity of polypropylene surface. At the same time, the contact angle of polypropylene film treated under different conditions was compared. The results showed that the contact angle of PP film decreased significantly after oxygen plasma treatment and the oxygen content was lower than that of argon. With the increase of discharge voltage and the prolonged treatment time, the contact angle decreased and finally stabilized at a minimum value The prolongation of the treatment time in the oxygen atmosphere helps to reduce the recovery of the contact angle so that a higher and stable hydrophilic polypropylene film can be obtained. The results show that atmospheric pressure plasma is a simple and effective treatment technology for the hydrophilic modification of polymer surface.