亲水涂层表面结晶度的测定及其对亲水性的影响

来源期刊：中南大学学报(自然科学版)2002年第5期

论文作者：刘清泉 潘春跃 黄拥理

文章页码：484 - 487

关键词：X射线衍射;表面结晶度;亲水性;接触角;亲水涂层

Key words：X-ray diffraction ;surface crystallinity; hydrophilicity;contact angle; hydrophilic coating

摘    要：用X射线衍射法测定了亲水涂层的表面结晶度.根据X射线衍射强度理论和高聚物的两相模型概念,用计算机分峰法处理了亲水涂层的衍射曲线,计算了相应的衍射积分强度;引入原子散射因子、角因子和温度因子等校正因子,利用原子散射因子的近似表达式,导出了亲水涂层结晶度的计算公式;用JLC型润湿角测量仪测定了亲水涂层与水的接触角,观察了亲水箔经自来水淋洗后形成水膜的情况.研究结果表明:随着亲水涂层表面结晶度的增大,小于5°接触角的重现性愈高,亲水涂层表面形成连续均匀水膜的能力愈强,即亲水箔的亲水性随着涂层表面结晶度的增大而增强.

Abstract: The surface crystallinity of the hydrophilic coating is determinated byX-ray diffraction(XRD). Based on the X-rayscattering intensitytheory and the double-phase model idea of polymer, the scattering curves of the hydrophilic coating are processed by CPRM, and the corresponding scattering intensities are calculated.The formula of calculating crystallinity is deduced by the combination of the atomic scattering factors, angle factors and temperature factors,and the surface crystallinity of the hydrophilic coating is calculated.The contact angle of the hydrophilic coating is measured by the Contact Angle Tester of JLC,and the quality ofwater filmon the hydrophilic coating is observed.The results indicate that the more the recurrence of contact angle less than 5°, the better the uniform water film, by increasing the surface cry stallinity of hydrophilic coating, that is to say,with the increase of surface crystallinity, the hydrophilicity of the hydrophilic coating is enhanced.