EV树脂基防水涂层的表面超疏水设计研究

本文选用常见的乙烯-醋酸乙烯酯共聚乳液（EVA）作为防水涂层的基料，对其表面进行疏水性设计，考察防水涂层的影响因素。将制备的 SiO₂颗粒进行有机改性，在 EVA表面负载改性的 SiO₂颗粒形成粗糙结构，接枝三甲氧基硅烷控制材料的润湿性能，达到对涂层表面的亲疏水性进行调控的目的。结果表明：制备的 SiO₂粒径 D97为 7 μm，红外光谱分析表明 SiO₂有机改性比较成功，SEM测试表明 SiO₂负载在 EVA表面，通过结构和化学亲疏水性设计的 EVA膜的接触角达到了 172. 9°。防水涂层在水中浸泡 72 h后，其水接触角仍维持在 170°左右，具有很好的疏水稳定性，表现出较好的应用潜力。

Study on Design of EVA Polymer Based Superhydrophobic Waterpro of Coatings

In this paper,the commonly used ethylene-vinyl acetate copolymer latex(EVA)was selected as the binder of waterproof coatings,and the surface was hydrophobically designed and the influencing factors on the waterproof coatings was investigated.The prepared SiO2 particles were organically modified,which were loaded on the surface of the EVA particles to form a rough structure,and trimethoxysilane was grafted to control the wettability of the material,so as to achieve the purpose of regulating the hydrophilicity and hydrophobicity of the coatings surface.The experimental results showed that 97% of the prepared SiO2 particle size(D97)was 7μm.Infrared spectroscopy analysis showed that the SiO2 was successfully modified.SEM test showed that SiO2 was loaded on the surface of EVA particles.The water contact angle of the EVA film reached 172.9°through structure and hydrophilically and hydrophobically design.W hen the waterproof coatings was immersed in water for 72 h,the contact angle on its surface was still maintained at about 170°.The coatings exhibited good hydrophobic stability and higher potential in applications.