In this work, we proposed a mild and fluorine-free strategy for fabricating robust superhydrophobic coatings with TiO₂, 3-mercaptopropyltriethoxysilane (MPTS) and polyhedral oligomeric silsesquioxanes using dip-coating and thiol-ene click reaction. The modified cotton exhibited superb superhydrophobicity with a WCA of 157.6°, which showed anti-wetting property in both water and air. Moreover, the durability of the treated cotton against acid and alkaline solutions, different temperatures, abrasion and peeling tests was verified. The highlight is the dual self-cleaning afforded by superhydrophobicity and photocatalytic degradation. The oil red O was adopted as organic pollutant model and could be decomposed completely with the aid of resultant coating after UV irradiation for 3 h. In addition, the modified cotton could be used as filter material and has the potential in the application of oil–water separation. After seven separation cycles, the separation efficiency still maintained 99.0%, while the WCA of cotton kept as high as 154.6°. Therefore, the above-mentioned features demonstrated that this fluorine-free method could reduce the usage of long-chain fluorinated polymers and prepare superhydrophobic cotton which could be applied in self-cleaning as well as oil–water separation fields.

中文翻译：

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通过硫醇-烯点击反应，基于TiO 2和POSS构建具有双重自洁和油水分离功能的超疏水棉的温和策略

在这项工作中，我们提出了一种温和，无氟的策略来制造具有TiO _2的坚固的超疏水性涂料。，3-巯基丙基三乙氧基硅烷（MPTS）和多面体低聚倍半硅氧烷使用浸涂和硫醇-烯点击反应。改性棉表现出极好的超疏水性，WCA为157.6°，在水和空气中均显示出抗湿性。此外，还证实了处理过的棉在酸和碱溶液，不同温度，磨损和剥离试验下的耐久性。最重要的是超疏水性和光催化降解提供的双重自清洁功能。油红O被用作有机污染物模型，在紫外线照射3 h后，借助生成的涂层可以完全分解。此外，改性棉可用作过滤材料，在油水分离应用中具有潜力。经过七个分离周期，分离效率仍保持99.0％，而棉花的WCA保持在154.6°。因此，上述特征表明，这种无氟方法可以减少长链氟化聚合物的使用，并制得可用于自清洁以及油水分离领域的超疏水棉。