高电压技术2012，Vol.38Issue(1)：147-156,10.
影响硅橡胶静态接触角测量结果的相关因素分析
Influencing Factors of Silicone Rubber Static Contact Angle Measurement
摘要
Abstract
To improve accuracy of static contact angle measurement of silicone rubber material,the influence of various factors on accuracy of silicone rubber static contact angle measurement should be studied.Basing on a contact angle meter,digital camera and dynamic and static contact angle calculation software DSCA（dynamic static contact angle）,we studied the influences of globule volume,delay time,temperature,water conductivity and sample longitudinal inclination on the static contact angle measurement according to sessile drop method.Results indicate that globule volume has little influence on the static contact angle measurement result,while different volume＇s globule images need different algorithms to calculate the contact angle.Static contact angle decreases with increase in delay time,however,clean,corona,and completely migration-contaminated samples have slow decrease speed,meanwhile,immersed,incompletely migration-contaminated samples have fast decrease speed.Temperature has some influences on the static contact angle measurement,static contact angle becomes small at low temperature.Water conductivity has no obvious effect on the measured static contact angle.If inclination direction is negative,the inclination may cause large error.If inclination direction is positive,in despite of large static contact angle or small static contact angle,the inclination has little influence on the measurement result of static contact angle,however,the inclined globule image will cause difficulty in automatic calculation of static contact angle.So,if a sample is taken out from low temperature condition,it must be placed to room temperature,if the sample is taken out from high temperature condition,it can be measured directly.The globule volume should be selected as 2~4 μL.The globule image should be pictured in 5 s after dripping.Deionized water should be selected,and running water or saline water with certain conductivity can be substituted.Photos should be taken when silicone rubber plane is perpendicular to camera lens plane.关键词
硅橡胶/静态接触角/体积/温度/电导率/倾斜/延迟时间Key words
silicone rubber/static contact angle/volume/temperature/conductivity/inclination/delay time分类
数理科学引用本文复制引用
徐志钮,律方成,张翰韬,刘云鹏..影响硅橡胶静态接触角测量结果的相关因素分析[J].高电压技术,2012,38(1):147-156,10.基金项目
国家自然科学基金 （）
教育部霍英东教育基金基础性研究课题 （）
中央高校基本科研业务费专项资金 （）
特高压工程技术（昆明、广州）国家工程实验室开放基金 （）
大学生创新性实验计划项目（20112126）~~ （）
