等离子体制备亲水性聚乙烯薄膜及其性能研究

以常压氩气(Ar)为工作气体,通过低温等离子体技术对聚乙烯薄膜表面引发接枝丙烯酸改性,从而制备出一种表面亲水性优良的聚乙烯薄膜,并用IR、AFM、接触角仪对其进行表征。结果表明:常压下单纯使用Ar低温等离子体对聚乙烯薄膜进行改性,表面接触角降低至43.21°±3°,但其时效性较差,随放置时间延长接触角会逐渐回复至70°±3°;而在使用表面丙烯酸接枝改性后,可使其接触角降低至19.21°±3°,并且接触角可稳定在30°±3°,薄膜表现出更优良的亲水性和耐久性。

Characterization of Hydrophilic Polyethylene Film Prepared by Plasma Treatment

In this paper, an Ar-atmosphere polyethylene film is surface modified via low temperature plasma treatment using acrylic acid as grafting agent, and acquires excellent surface hydrophilicity. The as- prepared polyethylene film is characterized by FT-IR, AFM, and static contact angle. The results show that after surface modification via low-temperature plasma treatment, the contact angle of the polyethylene film decreases to 43. 21°±3°, which shows instability, and gradually recovered to 70°±3° with time. When acrylic acid is used as grafting agent after surface-modification via low-temperature plasma treatment, the contact angle of the polyethylene film decreases to 19. 21°±3°, and is maintained at 30°±3°, which indi- cates excellent stability and hydrophilicity with time.