采用高压空气喷涂工艺,基于界面流与界面变形理论,制备出一种聚合物涂层。利用白光干涉三维形貌仪对涂层表面形貌进行表征。结果表明涂层表面具有亚毫米级和微米级二元复合的形貌特征。利用光学显微镜和红外热像仪对涂料成膜过程进行实验观察,并通过计算流体力学方法对其进行数值模拟,在此基础上讨论了涂层表面形貌的形成机理。利用小型高速水洞对聚合物涂层减阻性能进行初步测试,结果表明聚合物涂层可有效降低摩擦阻力。
A kind of polymer coating with submilli-microscale binary structured surface was prepared though spray-painting technology.The MicroXAMTM surface profiler was utilized to study the surface structure of polymer coating.Based on the experimental studies and numerical simulations of the solidification process of wet coating,the formation mechanism of binary structured surface was analyzed,which showed that interfacial convection and deformation induced by solvent evaporation played a key role.Test results in a water tunnel showed that the polymer coating had a visible drag reduction property.
参考文献
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