In recent years, photothermal materials that can convert light into heat energy have attracted extensive attention. In this work, we report a simple and effective approach to construct a self-cleaning photothermal superamphiphobic fabric. Dopamine (DA) can self-polymerize into polydopamine (PDA) and adhere to the surface of cotton fabric as a secondary reaction platform. Then, SiO₂ nanoparticles were in situ grown on the PDA@fabric surface by the sol–gel method. The PDA clusters can not only provide good photothermal conversion performance but also be integrated with SiO₂ to create micro–nano rough structures. Finally, the surface of SiO₂ was modified by the long chain of fluorosilane to decrease the fabric surface energy, resulting in superamphiphobicity. The contact angles of water, ethylene glycol, and pump oil on the modified fabric surface could reach 161.1, 158.1, and 142.2°, respectively, making the fabric resistant to contamination by water, common beverages, and oil. Due to the adhesion of the PDA layer, the strong binding force between the fabric and SiO₂ particles enabled the modified fabric to withstand various chemical and mechanical attacks, showing excellent mechanical robustness and harsh environmental stability. More importantly, the surface temperature of the modified fabric could be increased from 19.6 to 37.0 °C, which is close to the human body temperature, under the irradiation of simulated sunlight (I = 15 A, 300 s). The photothermal superamphiphobic fabrics with self-cleaning properties show great promise in the photothermal conversion field.

中文翻译：

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具有良好光热行为的聚多巴胺/SiO2混合结构超疏水织物

近年来，能够将光转化为热能的光热材料受到广泛关注。在这项工作中，我们报告了一种简单有效的方法来构建自清洁光热超疏水织物。多巴胺（DA）可以自聚合成聚多巴胺（PDA），作为二次反应平台附着在棉织物表面。然后，通过溶胶-凝胶法在 PDA@fabric 表面原位生长SiO _{2纳米颗粒。}PDA簇不仅可以提供良好的光热转换性能，还可以与SiO ₂结合形成微纳米粗糙结构。最后，SiO _2的表面被氟硅烷的长链改性以降低织物的表面能，从而产生超疏水性。改性织物表面的水、乙二醇和泵油的接触角分别可以达到161.1、158.1和142.2°，使织物能够抵抗水、普通饮料和油的污染。由于PDA层的粘附性，织物与SiO ₂颗粒之间的强结合力使改性织物能够承受各种化学和机械攻击，表现出优异的机械鲁棒性和恶劣的环境稳定性。更重要的是，在模拟太阳光的照射下，改性织物的表面温度可以从 19.6 ℃ 提高到 37.0 ℃，接近人体温度（I= 15 A，300 秒）。具有自清洁性能的光热超双疏织物在光热转换领域显示出巨大的前景。