复合控水砂表面结构及疏水性能研究

Study on surface structure and hydrophobicity of super-hydrophobic composite water control sand

任闽燕 宋金波 郑铎 梅明霞 许霞 杨军

REN Minyan SONG JinBo ZHENG Duo MEI Mingxia XU Xia YANG Jun

中国石化胜利油田分公司，山东东营　257000

Shengli Oilfield Co., Sinopec, Dongying 257000, China

以机械混合法对纳米氧化锌微粒进行了表面修饰改性，利用预聚和硅丙树脂的自组装功能，将制备的纳米氧化锌微粒与预聚和氟硅树脂混合制备了具有“荷叶效应 ”的超疏水涂层 ,静态水接触角达 158°，滚动角约为 5°。通过投射显微镜观察涂层的表面微观形貌，发现其具有荔枝皮状粗糙结构。通过接触角的测试、岩心流动驱替实验，探讨了表面微观结构、涂层粗糙度和涂层疏水性能之间的关系。结果表明：复合粒子构成的非均相界面的水接触角符合 Cassie模型。涂层的粗糙结构与自组装预聚和氟硅树脂成膜的低表面能的协同效应，使涂层具有了优良的超疏水性能。

Nanometer zinc oxide particle is modified by mechanical mixture to change the surface performance. Based on the self-assembly function of fluorin resin, A super-hydrophobic surface coating featured by “lotus effect” was prepared by mixing fluorin resin with nanometer zinc oxide. The surface coating has a very high static water contact angle (WCA) of 158° and a small sliding angle of 5°. Transmission microscope was used to observe and investigate roughness and WCA with WCA tester. It is found that there are many micro-convexities structure uniformly distributed on the surface of the coating which is similar to that of litchi rind surface. Relationships among the surface microstructure, roughness of coating and the hydrophobicity of the surface coating are discussed by water contact angle testing and core flow displacement testing. The result shows that water contact angle in heterogeneous interface which consist of compound particles correspond to Cassie model. And the reason for the excellent super hydrophobic properties on the coating surface is due to synergistic effect between an appropriate surface roughness and the low surface energy of fluorin resin with well self-assembly functions.