Nature-Inspired Hierarchical Protrusion Structure Construction for Washable and Wear-Resistant Superhydrophobic Textiles with Self-Cleaning Ability,ACS Applied Materials & Interfaces

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Nature-Inspired Hierarchical Protrusion Structure Construction for Washable and Wear-Resistant Superhydrophobic Textiles with Self-Cleaning Ability
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-12 , DOI: 10.1021/acsami.1c03539
Jianyu Chen ₁ , Luhan Yuan ₁ , Chu Shi ₁ , Caiqin Wu ₁ , Zhiwen Long ₁ , Hui Qiao ₁ , Keliang Wang ₂ , Qi Hua Fan

Affiliation

The use of toxic components and short longevity greatly restricted the commercial application of superhydrophobic surfaces in oil–water separation, antifouling, and self-cleaning. To address these concerns, a durable, robust, and fluorine-free superhydrophobic fabric is prepared on account of inspiration of nature. In this work, submicrometer-sized silica particles with different particle sizes are deposited onto cotton fabrics, followed by hydrophobic modification of poly(dimethylsiloxane) (PDMS), and consequently bonded the substrate and coating via powerful covalent bonds through a simple dip-coating technique. The rough surface with an imitated lotus-leaf-like hierarchical protrusion structure is constructed by deposited submicrometer-sized particles with different particle sizes, while the fabric with a low surface energy is achieved by the hydrophobic modification of PDMS. Ultimately, the fabricated fabric exhibits extraordinary superhydrophobicity with a high water contact angle (WCA) of 161° and a small sliding hysteresis angle (SHA) of 2.4°. Besides, considerable mechanical stability to withstand 130 sandpaper abrasion cycles and 40 washing cycles, and chemical resistance with sustained superhydrophobic property in various harsh environments (e.g., boiling water, strong acid/base solutions, and various organic solvents), are presented. Moreover, higher than 90% separation efficiency with a contact angle >150 ° is produced even after 50 cycles when the fabricated fabric serves as a filter during the oil–water separation besides its outstanding staining resistance and self-cleaning property.

中文翻译：

具有自洁能力的耐洗耐磨损超疏水纺织品的自然启发式分层凸起结构构造

有毒成分的使用和寿命短，极大地限制了超疏水表面在油水分离，防污和自清洁方面的商业应用。为了解决这些问题，考虑到自然的灵感，制备了一种耐用，坚固且无氟的超疏水性织物。在这项工作中，将具有不同粒径的亚微米级二氧化硅颗粒沉积到棉织物上，然后对聚二甲基硅氧烷（PDMS）进行疏水改性，然后通过简单的浸涂技术通过强大的共价键将基材和涂层粘合在一起。由沉积的亚微米级颗粒（具有不同的粒径）构成具有仿荷叶状分层突起结构的粗糙表面，而低表面能的织物是通过PDMS的疏水改性获得的。最终，制成的织物表现出非凡的超疏水性，具有161°的高水接触角（WCA）和2.4°的小滑动滞后角（SHA）。此外，还提出了可承受130次砂纸磨损循环和40次洗涤循环的相当大的机械稳定性，以及在各种恶劣环境（例如沸水，强酸/碱溶液和各种有机溶剂）中具有持续超疏水性的耐化学性。此外，当制造的织物在油水分离过程中用作过滤器时，即使具有50个循环，但仍具有90％以上的分离效率，接触角大于150°，并且具有出色的耐污染性和自清洁性能。

更新日期：2021-04-21

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