Plasma Surface Treatment of BOPP Film by Dielectric Barrier Glow Discharge in Argon/Air

A plasma surface treatment of biaxially oriented polypropylene (BOPP) film was carried out with dielectric barrier glow discharge (DBGD) in Ar/air. The paper studied the effects of the ratios of Ar/air plasma on the BOPP surface modification. The results indicated that the efficiency of the plasma surface modification was improved with increasing treatment time and power density with DBGD in Ar/air. The water contact angle increased first and then decreased with the increase of the Ar/air mixture rate. The DBGD gives a better surface modification than filament discharge. The ageing behavior was influenced by the mixture rate of Ar/air, but the water contact angle of the treated sample was always less than that of un-treated sample.

高纯空气介质阻挡辉光放电对双向拉伸聚丙烯薄膜表面改性研究

设计智能等离子体放电实验系统,并通过高纯空气介质阻挡辉光放电(DBGD)等离子体对双向拉伸聚丙烯薄膜(BOPP)进行表面改性。利用接触角测试仪对样品表面进行接触角测量和固体表面能分析;利用傅里叶红外光谱仪表征BOPP膜表面的化学成分变化。结果表明,产生介质阻挡辉光放电的间隙与气体气压大小成反比,高纯空气介质阻挡辉光放电对改善BOPP膜表面的固体表面能效果明显,表面液体接触角显著变小,等离子体表面改性效果随处理时间和放电功率密度的增加而显著提升。通过对处理前后样品的傅里叶红外光谱分析,发现处理后的样品出现了新的C—O基团和C—H键等,薄膜表面化学结构发生了变化。