超疏水材料因其在防腐、防覆冰、自清洁以及油水分离等领域的广泛应用前景而受到越来越多的关注,发现了一种耐磨超疏水涂层的简易制备方法。该超疏水涂层以含有三氟甲基侧基的聚芳醚酮为主要构筑材料,通过喷涂含氟长链的SiO2纳米小球(F-SiO2纳米小球,尺寸480nm左右)、二氯甲烷溶胀和高温处理在涂层表面构筑微纳复合结构。这些微纳复合结构减少了水和涂层的接触面积,降低了水和涂层之间的附着力,因而使水滴在涂层上的接触角由92°增大到156°,涂层由疏水变为超疏水。此外由于含有三氟甲基侧基的聚芳醚酮的分子链与F-SiO2纳米小球疏水链的相互缠结作用,所获得的超疏水薄膜具有良好的耐磨性能。经过砂纸打磨5次后,水在涂层上的接触角仍然高达143°。这种耐磨超疏水材料具有较高的使用寿命和广泛的实用价值。
Materials with superhydrophobicity are gaining increasing attention,due to their potential applications in anti-corrosion,anti-fog,self-cleaning and oil-water separation.The facile preparation of superhydrophobic coating with abrasion resistant properties was reported.The coating was prepared by using poly (aryl ether ketone) (PAEK) with trifluoromethyl functionalities (s-F-PAEK) as matrix and spraying SiO2 nanoparticles with long fluorine-containing chains (F-SiO2 nanospheres,diameter: around 480nm),followed by swelling with dichloromethane and thermal treatment to result in the coating with micro-/nano-structures.These micro-/nano-structures reduced the contact area between water and coating,decreased the adhesion of water to the coating,thus leaded to a drastic increase of the water contact angle from 92° in pure s-F-PAEK film to 156° in the composite film,and endowed s-F-PAEK film with hydrophobicity.Besides,due to the entangling interaction between s-F-PAEK chains and F-SiO2 nanoparticles,the obtained composite film enjoyed good abrasion resistance.After grinding with sand paper for five times,the water contact angle of the film was still 143°.The excellent abrasion resistance of the composite film guaranteed its operation life and added to its feasibility in practical applications.
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基金资助
吉林省教育厅“十三五”科学技术项目(JJKH20200249KJ);中央引导地方科技发展资金(202002007JC)
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