Herein, a grid-like microstructure is prepared on the surface of 3Cr13 stainless steel through nanosecond laser etching, and the self-assembled 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDS) coating is further composited to prepare a superhydrophobic surface with a contact angle of 164° and a rolling angle of 3°. The effect of laser etching cycles on the surface microstructure and surface wettability before and after the self-assembly is studied. With an increase in the etching cycles, a stable grid-like microstructure is gradually formed on the surface, and subsequently, a composite structure of grooves and pits is formed. After the self-assembly of the PFDS coating, two superhydrophobic surfaces with different wetting properties are obtained. Furthermore, as the etching cycles increase, the surface changes from a superhydrophobic and high-adhesion state to a superhydrophobic and low-adhesion state. The decrease in surface energy is mainly attributed to the C−F group in the PFDS molecule. The experimental results show that PFDS molecules are deposited easily in case of the convex surface, thereby facilitating the formation of superhydrophobic low-adhesion surfaces. Finally, the superhydrophobic surface is still maintained after cumulative ultrasonic cleaning in deionized water for 75 min, showing good reusability and stability.

中文翻译：

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激光蚀刻复合自组装1H,1H,2H,2H-全氟癸基三乙氧基硅烷超疏水表面涂层的制备及润湿机理

本文通过纳秒激光刻蚀在3Cr13不锈钢表面制备了网格状微结构，自组装的1 H ,1 H ,2 H ,2 H进一步复合-全氟癸基三乙氧基硅烷（PFDS）涂层，制备出接触角为164°、滚动角为3°的超疏水表面。研究了激光刻蚀循环对自组装前后表面微观结构和表面润湿性的影响。随着刻蚀周期的增加，表面逐渐形成稳定的网格状微结构，随后形成凹槽和凹坑的复合结构。PFDS涂层自组装后，得到了两个具有不同润湿性能的超疏水表面。此外，随着蚀刻周期的增加，表面从超疏水和高粘附状态变为超疏水和低粘附状态。表面能的降低主要归因于 PFDS 分子中的 C-F 基团。实验结果表明，PFDS分子在凸面的情况下容易沉积，从而有利于超疏水低粘附表面的形成。最后，在去离子水中累积超声清洗75 min后仍保持超疏水表面，表现出良好的可重复使用性和稳定性。