Abstract: Acrylic acid was grafted onto PET nanofiber membrane by low-temperature plasma treatment. The effects of plasma power and treating time on the wetting of membrane were studied. The grafting process was carried out under a vacuum of 60 Pa、flow rate of AA 3L/min，electric discharge power in the range of 75～150 W，treating time 60 s or 150 W， treating time from 30 s to 60 s，resulting in hydrophilic PET membrane with a zero water contact angle. The SEM，ATR-FTIR and tensile test were applied to observe the changes of PET membrane；and the elongation and the strength of the PET nanofiber membrane have been enhanced after plasma treatment. The low-temperature plasma treatment grafted with AA could be a potential method to modify the surface of PET electrospun nanofiber membran and have positive effects in application.

Key words: low-temperature plasma, PET, acrylic acid, surface modification, grafting

摘要： 介绍了低温等离子体引发丙烯酸（AA）表面接枝聚合对聚苯二甲酸乙二醇酯（PET）纳米纤维薄膜的改性研究。实验探索了放电时间和放电功率对薄膜润湿性的影响，在真空度60 Pa、AA气体流量3 L/min条件下，放电功率75～150 W范围内，放电时间60 s和放电功率150 W、放电时间30~60 s范围内，处理后薄膜的水接触角均为0°，结果说明了此改性PET纳米纤维膜具有超亲水性。通过扫描电镜、红外和力学性能等测试讨论了接枝处理前后薄膜的形态及性能的变化。实验结果表明气相低温等离子体接枝处理后，薄膜的断裂伸长率和断裂强度有一定的增强。低温等离子体引发AA表面接枝PET纳米纤维薄膜的方法有望成为电纺PET纤维膜表面改性的有效手段，具有积极的应用价值。

关键词: 低温等离子体, 聚对苯二甲酸乙二醇酯, 丙烯酸, 表面改性, 接枝