改性纳米碳酸钙制备超疏水涂层

Preparation of superhydrophobic coatingusing modified CaCO_3

通过油酸改性纳米碳酸钙颗粒使其表面由亲水性变成了疏水性,改性后的纳米颗粒与低表面能的有机硅树脂聚二甲基硅氧烷经过混合陈化固化过程后在玻璃表面形成超疏水涂层.实验通过改性后的纳米粒子在聚合物介质上构造纳米/微米尺度的结构表面.用接触角测量仪和扫描电镜分别检测涂层的疏水性能和涂层的表面形态.实验结果表面涂层有优异的自清洁能力,平均静态水接触角达160°滚,动角为6°,涂层表面成功构造了纳米/微米的双重粗糙结构.该方法简单有效具有很大的应用前景.

CaCO3 nanoparticles were modified from hydrophilic to hydrophobic with oleic acid, and hy- drophobic coating was formed on the glass substrates with modified nanoparticles and organic silicone resin polydimethylsiloxane via a simple process, including mixing and cure. The surface wettability and topology of coating were studied by contact angle measurement and Scanning electron microscopy. The experimental results showed that the coating exhibited self-cleaning property with a water average con- tact angle of 160°and sliding angle of 6°and coating surface has elaborate nanometer- and micrometer- sized roughness structure. This method has good prospect for applications.