Hydrophobic modification of polyethylene terephthalate using nanosecond-pulse dielectric barrier discharge
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摘要: 基于自主研制的ns脉冲电源（上升沿约70 ns, 脉宽约100 ns）激励介质阻挡放电产生大气压低温等离子体, 在CF4气氛下对聚对苯二甲酸乙二酯（PET）表面进行了憎水改性处理, 测量了改性前后的薄膜表面的水接触角, 给出了CF4气流量、放电电压、处理时间和CF4比例等参数对改性效果的影响规律。结果表明, 大气压ns脉冲DBD表面处理能够实现PET材料的憎水性, 改性后的PET表面水接触角由66提高到最大100。Abstract: Compared to the traditional method for surface treatment, non-thermal plasmas have advantages such as low pollution, simple process and low cost. In the paper, non-thermal plasmas are generated by dielectric barrier discharge (DBD) excited by China-made nanosecond-pulse generator with a rise time of ~70 ns and a full width at half maximum of ~100 ns. Such plasmas are used to modify the hydrophobic of the surface of polyethylene terephthalate (PET) in atmospheric carbon tetrafluoride (CF4). The static water contact angle of the PET surface is measured before and after treatment. The effects of CF4 flow, applied voltage, treatment time and CF4 ratio on modification performance are presented. The results show that the hydrophobic of the PET surface can be achieved using DBD plasmas. The static water contact angle of the PET surface can be up to 100 from 66.
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