Preparation of transparent superamphiphobic coating by rationally designed rough structure

IF 2.3 4区材料科学 Q2 CHEMISTRY, APPLIED

Journal of Coatings Technology and Research Pub Date : 2024-05-28 DOI:10.1007/s11998-024-00949-w

Rongkang Xu, Hong Ye, Mingyuan Wu, Qingyun Wu, Jianjun Yang, Jiuyi Liu, Jianan Zhang

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Abstract

Superamphiphobic coating with excellent optical transmittance has immense potential for utilization in many fields. However, it is challenging to maintain superamphiphobic surface with high transparency. Herein, a lotus leaf-inspired double-layered coating is proposed. The bottom layer of the coating consisted of fluorosilane-modified epoxy resin, while the top layer was composed of fluorosilane-modified SiO₂ and cellulose nanofibers (CNFs). The trends of optical transmittance and oil-water contact angle of the coating at different mass ratios between SiO₂ and CNFs were systematically investigated, and the stability of the coating was further studied by means of immersion in water, tape peeling, falling sand abrasion, and ultraviolet radiation. Experimental results showed that the coating exhibited the best comprehensive performance when the mass ratio of SiO₂ to CNFs was 1:1. The coating exhibited optical transmittance of 79%, while the contact angles of water, glycerol, glycol, and hexadecane were up to 169°, 163.5°, 155.2°, and 125.4°, respectively. Even after the stability test, the coating still showed a good superamphiphobic performance. This demonstrates that the coating exhibited excellent optical transmittance, good chemical stabilities, and high mechanical stability.

Graphical abstract

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利用合理设计的粗糙结构制备透明超疏油性涂层

具有优异光学透射率的超疏涂层在许多领域都具有巨大的应用潜力。然而，保持超疏表面的高透明度是一项挑战。本文提出了一种受荷叶启发的双层涂层。该涂层底层由氟硅烷改性环氧树脂组成，表层由氟硅烷改性二氧化硅和纤维素纳米纤维（CNFs）组成。系统研究了不同质量比 SiO2 和 CNFs 涂层的透光率和油水接触角的变化趋势，并通过浸水、胶带剥离、落砂磨损和紫外线辐射等手段进一步研究了涂层的稳定性。实验结果表明，当 SiO2 与 CNFs 的质量比为 1:1 时，涂层的综合性能最佳。涂层的透光率为 79%，而水、甘油、乙二醇和十六烷的接触角分别达到 169°、163.5°、155.2° 和 125.4°。即使经过稳定性测试，涂层仍具有良好的超疏水性。这表明该涂层具有出色的透光性、良好的化学稳定性和较高的机械稳定性。

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来源期刊

Journal of Coatings Technology and Research 工程技术-材料科学：膜

CiteScore

4.30

自引率

8.70%

发文量

130

审稿时长

2.5 months

期刊介绍： Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.