中文摘要：

相对于丝状放电模式,均匀介质阻挡放电（DBD）产生的等离子体功率密度适中,可以对材料表面进行更均匀的处理,在大规模工业应用上具有更为广阔的前景。本文用He和Ne均匀DBD产生的低温等离子体对聚对苯二甲酸乙二酯（PET）薄膜进行表面改性,通过接触角、表面能测量以及ATR-FTIR等手段研究了等离子体处理前后PET的表面特性,从能量密度角度比较了两种气体中均匀DBD处理后PET表面特性的变化规律,并对所得到结果进行分析。结果表明,两种气体均匀DBD改性后,PET薄膜表面水接触角随能量密度的增加而减小,表面能随能量密度的增加而增加,两者均在一定能量密度时达到饱和值;未达到饱和前,在相同能量密度下,Ne均匀DBD改性更迅速,但处理饱和后,两种均匀DBD的改性效果相差不大。因此,选择Ne作为工作气体可以提高生产效率,而选择He作为工作气体可以节约生产成本,两者均能得到良好的改性效果。

英文摘要：

The surfaces of the polyethylene terephthalate（PET） membrane were modified with the non-thermal plasma generated by homogeneous dielectric barrier discharge in helium and neon atmospheres,respectively.The impacts of the modification conditions,including the gas types,gas flow rate,and energy density,on the surface properties were evaluated.The surface properties of the PET membranes,before and after the modification,were characterized with attenuated total reflectance Fourier transform infrared spectroscopy,and contact angle measurement.The results show that instead of gas types,the energy density strongly affects the contact angle and the PET surface energy.As the energy density increased,the contact angle decreased and the surface energy increased to their saturated values,respectively.At a given energy density,Ne gas outpaces He gas in surface modification.We suggest that Ne gas may increase efficiency,and He gas reduce production cost.