石英材料接触角的影响因素及敏感性研究

Study on Influencing Factors and Sensitivity of Contact Angle of Quartz Materials

为了检验液滴大小、液滴蒸发、石英片表面干湿程度以及石英毛细管内径对接触角测量的影响,基于测高法,借助接触角及表面张力测试仪研究了不同因素影响下的接触角变化规律并分析了其原因。结果表明:随着液滴体积的增大,测高法测得的接触角相对误差逐渐增大;随着测量时间的延续,接触角总体上呈减小趋势;随着亲水性固体表面干湿程度的增加,测高法测得的接触角逐渐减小;随着石英毛细管内径的增大,接触角呈现出先减小后增大的趋势。

To test the influence of droplet size,droplet evaporation,quartz surface wet degree and quartz capillary inner diameter on contact angle measurement,this paper,based on the measurement of height,employed a contact angle and surface tension testing instrument to investigate the variation patterns of contact angles under the influence of different factors and analyzed the underlying reasons.The results indicate that:with the increase of droplet volume,the average relative error of contact angle measured by alt-measuring method increased gradually.With the continuation of the measurement time,the contact angle generally showed a decreasing trend.With the increase of the wetting degree of hydrophilic solid surface,the average contact angle measured by alt-measuring method decreased gradually.With the increase of the inner diameter of the quartz capillary,the contact angle decreased first and then increased.