中文摘要：

采用针-板电极研究了直流电晕对硅橡胶材料憎水性的影响。发现直流电晕对硅橡胶表面憎水性的影响较小。湿度、迁移时问、电压等因素对硅橡胶材料憎水性影响较小，特别是对憎水性充分迁移的染污硅橡胶试片的影响更小。这与交流电晕作用硅橡胶材料时有明显差异。通过分析直流电晕下硅橡胶表面放电过程、表面电荷积聚和表面结构的变化，认为在直流电晕下，硅橡胶材料表面化学反应较弱是直流电晕对硅橡胶表面憎水性影响甚微的原因。

英文摘要：

A needle-plane electrode system was used to study the hydrophobicity of silicone rubber （SR） under direct current （DC） corona. It is found that the influence of DC corona on hydrophobicity of SR is slight. Humidity, transfer time and voltage also slightly affect the hydrophobicity of SR. In particular, this influence is slighter when the surface of SR is contaminated. The phenomenon under DC corona is evidently different with that under alternating current corona. So, after analyzing the surface discharge, surface charge accumulation and change of surface structural under DC corona, this paper considers that the chemical reaction in SR surface is too weak to change the hydrophobicity of SR under DC corona.