绝缘板材硅橡胶表面超疏水性的研究

Research on Surface Hydrophobic Property of Silicone Rubber Used for Insulating Sheet Materials

采用等离子体处理技术,利用四氟甲烷(CF4)等离子体对硅橡胶表面进行疏水改性,用接触角测量仪对改性的硅橡胶表面疏水性进行了定量分析,计算了改性后硅橡胶的表面能,利用AFM对硅橡胶表面的微观形貌进行了表征,讨论了四氟甲烷等离子体处理时间对硅橡胶疏水性的影响。结果表明:经过四氟甲烷等离子体处理的硅橡胶试样表面的疏水性得到了提高,当处理时间为5 min时,硅橡胶表面的粗糙度算术平均值出现极大值112.990 nm,表面能具有极小值2.94 m J·m^(-2),硅橡胶试样表面的疏水接触角也达到了最大150.2°,经过四氟甲烷改性的硅橡胶具有了超疏水性。

Silicone rubber was modified by four fluorine methane（CF4） plasma for improving its surface hydrophobic property. Contact angle meter was used to carry on quantitative analysis of surface hydrophobic property of modified silicone rubber. Atomic force microscope（ AFM） was employed to characterize the surface microstructure. The surface energy of modified silicone rubber was calculated, and the effect of CF4 plasma processing time on the surface hydrophobic property was discussed. The results showed that the surface hydrophobic property of silicone rubber processed by CF4 plasma was obviously improved. When the processing time was5 min, the maximum of arithmetic mean value of the surface roughness amounted to 112.990 nm, the minimum of surface energy 2.94 m L·m^-2, the optimum value of the static contact angle for water 150.2°. The research showed silicone rubber could have super-hydrophobic property after being modified by CF4.