温度对硅橡胶电晕时憎水性的影响  

Influence of Temperature on Silicone Rubber Hydrophobicity Caused by Corona

作　　者：徐志钮[1] 律方成[1] 李嫚[1] 王秋莎[1] 张彦军[1] 刘云鹏[1] 

机构地区：[1]华北电力大学生物质发电成套设备国家工程实验室,保定071003

出　　处：《高电压技术》2011年第1期69-76,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724508)~~

摘　　要：为研究温度对交流电晕导致硅橡胶憎水性丧失和恢复的影响,搭建了1套硅橡胶电晕测试系统,系统首先利用针板电极产生极不均匀电场,其次基于USB-9215A采集卡和图形化编程软件LabVIEW搭建了施加电压和电晕电流的监测系统,最后基于ANSYS建立了多个针板电极模型并进行了电场分析,结果表明多针电晕系统中各针板电极相应处场强相等,并用同样厚度的多个试样的试验结果验证了各针板电极电晕效果的一致性。研究发现交流电晕后硅橡胶表面也存在电荷,必须进行释放,否则可能会给试验结果带来较大误差,为此进行了机理上的解释并给出了消除表面电荷的方法。另外研究了温度单一因素对硅橡胶憎水性丧失和恢复的影响,结果表明:随着环境温度的升高硅橡胶在电晕时憎水性丧失速度变慢,憎水性恢复速度变快。To study the influence of temperature on hydrophobicity loss and recovery of silicone rubber caused by AC corona,a silicone rubber corona test and measurement system was built.Firstly,highly non-uniform electric field of the system was generated by needle-plate electrode,then,the applied voltage and corona current monitoring system was set up by the data acquisition card USB-9215A and graphical programming software LabVIEW,finally,electric field analysis model of multiple needle-plate electrodes was built and analyzed by ANSYS.The analysis results indicate that the field strength of corresponding region of different needle-plate electrode has similar field strength,which is verified by the experiment results of multiple same thickness silicone rubber samples.It is also found that charge exists on the silicone rubber surface after the AC corona,and it must be released,otherwise the contact angle measurement result may have obvious error.Moreover,a charge releasing method was presented.The influence of single temperature reason on silicone rubber hydrophobicity loss and recovery was studied.The results indicate that the hydrophobicity loss speed caused by the corona will decrease with the increase of ambient temperature,and the hydrophobicity recovery speed will increase with the increase of ambient temperature.

关 键 词：硅橡胶 交流电晕 温度 憎水性 静态接触角 表面电荷 

分 类 号：TM851[电气工程—高电压与绝缘技术] TM215.2[一般工业技术—材料科学与工程]