• Acta Photonica Sinica
  • Vol. 51, Issue 7, 0751414 (2022)
Jialiang ZHANG1, Yang CHENG2, Qing YANG2, Jie LIANG1, Zheng FANG2, Xun HOU1, and Feng CHEN1、*
Author Affiliations
  • 1Shaanxi Key Laboratory of Photonics Technology for Information,State Key Laboratory for Manufacturing System Engineering,School of Electronics & Information Engineering,Xi'an Jiaotong University,Xi'an 710049,China
  • 2School of Mechanical Engineering Xi'an Jiaotong University,Xi'an 710049,China
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    DOI: 10.3788/gzxb20225107.0751414 Cite this Article
    Jialiang ZHANG, Yang CHENG, Qing YANG, Jie LIANG, Zheng FANG, Xun HOU, Feng CHEN. Research Progress of Femtosecond Laser Preparation of Durable Superhydrophobic Surface and Its Application(Invited)[J]. Acta Photonica Sinica, 2022, 51(7): 0751414 Copy Citation Text show less

    Abstract

    Although superhydrophobic surfaces have shown great potential in oil-water separation, anti-icing and self-cleaning, the practical applications were often limited by their brittle durability. The fragility of superhydrophobic surface structure is the main reason that hinders its practical application. Due to the further study of superhydrophobic surface, the failure of superhydrophobic surface has also been explored. This paper reviews the research progress of durable superhydrophobic surface prepared femtosecond laser and its application.In the section of background, firstly, several basic wettability models are introduced, and the characteristics of durable superhydrophobic surfaces are analyzed. Then, the advantages of femtosecond laser micro-nano processing in the preparation of superhydrophobic surfaces are discussed. The research progress of femtosecond laser preparation of the durable superhydrophobic surface for different materials such as polymer, metal and glass were concluded. The application fields of durable superhydrophobic surface fabricated by femtosecond laser were summarized.There are several methods to improve the durability of the superhydrophobic surface according to the application requirements. Firstly, the mechanical stability of the superhydrophobic surface with multi-scale micro-nanocomposite structure is much higher than that of the single micron or nano-scale rough structure. Secondly, the durability of superhydrophobic surface can also be improved by strengthening the surface microstructure on the material surface through the bonding layer. This form of adhesive can not only strengthen the bonding strength between microstructure and surface, but also play a buffer role when the surface is impacted by external force, protecting the micro-nano rough structure, and effectively improving the mechanical durability of superhydrophobic surface. Thirdly, the physical protection of micro-nano structures is carried out by constructing a surface protective layer, thereby improving their mechanical durability. Finally, the construction of self-healing superhydrophobic surface has become a powerful mean to improve the durability. Different from the previous strategies, self-healing strategies mainly focus on the recovery of damaged superhydrophobic function, thereby extending its service life. Finally, the matrix material with good intrinsic durability can be selected. Combined with femtosecond laser, a durable superhydrophobic surface can be prepared. Considering the failure reason of superhydrophobic surface and the advantages of femtosecond laser processing, durable superhydrophobic surfaces were prepared on different durable matrix materials, which is of great significance to the practical application of superhydrophobic surfaces. The variety of application requirements of superhydrophobic surfaces are different, and the corresponding durability requirements also show a great variety. Regarding the matrix materials, the superhydrophobic surface matrix material can be roughly divided into polymer, glass and metal. In terms of polymers, the superhydrophobic surface with excellent durability in PTFE can be easily prepared by femtosecond laser, as PTFE is in great stability. Besides, femtosecond laser can also prepare light responsive superhydrophobic surface on shape memory polymer. After the surface structure is deformed by an external force, it can recover to the initial state under a sunlight, and then restore to the superhydrophobic state. For metal materials, femtosecond laser combined with low surface energy material modification can directly prepare superhydrophobic surfaces on stainless steel, aluminum, zinc and other metal surfaces, and some of the superhydrophobic properties will change interestingly. For example, superhydrophobic surfaces fabricated on zinc can change the superhydrophobic properties in UV irradiation and dark storage. In terms of glass, the prepared superhydrophobic surface has very good mechanical stability and thermal stability. Based on the properties of the substrate material, adjusting the femtosecond laser processing strategy and parameters, and then implementing appropriate chemical modification according to the needs, can give the surface of the substrate material superhydrophobic properties.Generally speaking, the durability of superhydrophobic surface includes mechanical durability and chemical durability. To improve the mechanical durability, multi-scale micro-nano structures need to be constructed. The femtosecond laser has great advantages in constructing multi-scale micro-nano structures, which can be applied to almost all hard materials. In terms of chemical durability, femtosecond laser also achieves very stable superhydrophobic surfaces on some chemically stable and difficult-to-machine materials. Based on many different matrix materials, superhydrophobic materials have been increasingly applied in many fields such as self-cleaning, oil-water separation and anti-icing. Superhydrophobic materials have been applied in real life in the field of self-cleaning, chemical stability, as well as anti-ultraviolet. In oil-water separation, due to the excellent durability of matrix materials, the durable superhydrophobic materials play a huge role in solving oil pollution and industrial wastewater treatment. As for anti-icing, due to the low ice adhesion and mechanical durability in superhydrophobic materials, the key problems of transportation and aviation are hopeful to be solved.With the advantages of high machining accuracy, good universality and strong controllability of femtosecond laser in the field of micro-nano processing, supplemented by other methods such as chemical modification, and combined with the failure characteristics of superhydrophobic surfaces, it is expected to prepare durable superhydrophobic surfaces on many materials, which also greatly expands the application prospect of durable superhydrophobic surfaces in the fields of self-cleaning, oil-water separation and antiicing.
    Jialiang ZHANG, Yang CHENG, Qing YANG, Jie LIANG, Zheng FANG, Xun HOU, Feng CHEN. Research Progress of Femtosecond Laser Preparation of Durable Superhydrophobic Surface and Its Application(Invited)[J]. Acta Photonica Sinica, 2022, 51(7): 0751414
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