用大气中低温等离子体提高玻璃表面憎水性的研究

用空气中介质阻挡放电 (DBD) 产生的常压低温等离子体对玻璃表面进行憎水性改性,通过测量水接触角、表面电阻和湿闪络电压等研究了 DBD 等离子体处理前后玻璃的表面特性,以及处理电压和处理时间对改性效果的影响。实验结果表明,DBD 等离子体在玻璃表面键合了一层致密的憎水膜。随处理电压和处理时间的不同,改性效果不同,在恒定处理电压下有一最佳处理时间。热老化和化学老化的实验结果表明,所生成的憎水层具有较好的抗老化性能。

Hydrophobicity improvement of glass surface treated with atmospheric pressure non-thermal plasma

Surface modification of glass for improving hydrophobicity using the non-thermal plasma generated by dielectricbarrierdischarge DBD) atatmospheric pressure is conducted. The surface properties of the glass before ( and after the DBD treatment are studied using contact angle measurement, surface resistance measurement and wet flashover voltage tests. The effects of the applied voltage and time duration of DBD on the surface modification are discussed and the interaction mechanism between the plasma and glass surface is analyzed. It is found that a layer of hydrophobic coating is formed on the glass surface by DBD treatment, and the improvement of hydrophobicity depends on the DBD voltage and treatment time. There exists an optimum treatment time for a certain applied voltage of DBD. The test results of thermal aging and chemical aging show that the hydrophobic layer has quite stable characteristics.