类水黾脚部“凹凸沟壑”结构仿生超疏水涂层的制备与性能
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吉首大学 化学化工学院

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TQ63

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国家级重点大学生创新训练项目(202210531001);湖南省自然科学基金青年项目(2023JJ40516);教育厅青年项目(22B0551);湖南省创新省份建设专项(2020SK2028)


Preparation and properties of bionic superhydrophobic coating with “concave and convex gully” structure like the foot of water strider
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College of Chemistry and Chemical Engineering, Jishou University

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    摘要:

    以坡缕石粉为功能颜料,环氧树脂E-44和杜仲胶混合物为成膜物质,在涂有环氧/杜仲胶清漆的表面制备了一层具有类水黾脚部“凹凸沟壑”结构的仿生超疏水涂层。对涂层形貌和结构进行SEM、FTIR、XRD表征,对C3涂层(坡缕石粉质量分数为25%)进行水接触角、水滚动角、自清洁性能、抗润湿性能、耐磨性能、耐水性能等测试。结果表明,C3涂层表面具有明显的“凹凸沟壑”结构,其平均静态、动态水接触角为153.1°、152.6°,水滚动角为8.8°,具有优异的自清洁性能;C3涂层对泥土浆液、甲基橙溶液和亚甲基蓝溶液具有优良的抗润湿性,接触角均大于150°;C3涂层具有良好的基材适用性,涂覆于混凝土、织物棉布、纸张及塑料等表面均具有超疏水性能;经过载重为100 g的A4纸循环打磨50次,C3涂层水接触角依然高达151.9°,具有较好的耐磨性能;C3涂层在经过18和24 h浸泡后,其水接触角分别为152.2°和144.5°。

    Abstract:

    A superhydrophobic coating with the structure of "concave and convex gully" structure like the foot of water strider was prepared on the surface coated with epoxy/gutta-percha varnish using palygorskite powder as the functional pigment and the mixture of epoxy resin and gutta-percha as the film-forming material. The surface morphology and structure were characterized by means of scanning electron microscope (SEM), infrared spectroscopy (FTIR), X-ray diffraction spectrum (XRD). The water contact angle, water rolling angle, self-cleaning property, wettability, wear resistance and water resistance of C3 coating (mass fraction of palygorskite powder was 25%) were tested. The results showed that the surface of C3 coating had obvious "concave and convex gully" structure, the average static and dynamic water contact angle were 153.1° and 152.6°respectively, and the water rolling angle was 8.8°, which had excellent self-cleaning performance. In addition, the C3 coating also showed excellent wettability resistance to mud slurry, methyl orange solution and methylene blue solution, and all the contact angles were above 150°. The C3 coating had good substrate applicability, and showed super hydrophobic properties on the surface of concrete, fabric, paper and plastic. After 50 times of cyclic polishing of A4 paper with a load of 100 g, the water contact angle was still as high as 151.9°, with good wear resistance. After soaking for 18 and 24 h, the water contact angle of C3 coating were 152.2° and 144.5°, respectively.

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陈健君,易帆,邱培华,陈加漓,罗嘉晋,邱桃杰,孟琨明,雷辉斌.类水黾脚部“凹凸沟壑”结构仿生超疏水涂层的制备与性能[J].精细化工,2024,41(7):

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  • 收稿日期:2023-06-09
  • 最后修改日期:2023-10-27
  • 录用日期:2023-10-17
  • 在线发布日期: 2024-07-11
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