Robust superhydrophobic fabric via UV-accelerated atmospheric deposition of polydopamine and silver nanoparticles for solar evaporation and water/oil separation
Robust superhydrophobic fabric via UV-accelerated atmospheric deposition of polydopamine and silver nanoparticles for solar evaporation and water/oil separation
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DOI：
10.1016/j.cej.2021.132539
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发表时间：
2022-02
影响因子：
15.1
通讯作者：
Hongliang Zhang;J. Ou;X. Fang;S. Lei;Fajun Wang;Changquan Li;Wen Li;Yanting Hu;A. Amirfazli-A.-Am
中科院分区：
文献类型：
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作者：
Hongliang Zhang;J. Ou;X. Fang;S. Lei;Fajun Wang;Changquan Li;Wen Li;Yanting Hu;A. Amirfazli-A.-Am
受贻贝启发的聚多巴胺（PDA）在表面改性中发挥着独特的作用，因为它对几乎所有种类的材料和随后的功能都有很强的附着力。然而，PDA的沉积及其随后的金属化在体溶液中是缓慢的，因此基于PDA的表面改性效率不高。本文提出了一种利用紫外（UV）照射下大气沉积的方法，使PDA和银纳米粒子（Ag NPs）在棉织物上快速沉积。“快”一词意味着整体沉积效率提高了45倍。含有PDA和Ag NPs的织物经十二烷基硫醇（DT）进一步改性，成为超疏水织物。Ag纳米粒子在超疏水织物的制备和应用中发挥着多种作用，即增强织物的疏水性和光热效应。由于织物的超疏水性和优异的光热效应，漂浮在水面上的织物可以收集太阳能，促进海水的局部蒸发。蒸发速率为1.66 kg/(m2·h)，太阳能转换效率为91%。作为油水分离膜，对油水混合物的分离效率大于96%，油通量大于12 m3·m−2·h−1。总的来说，这是一个从海到海的故事。受到贻贝这一海洋生物的启发，PDA被快速沉积在织物上，并作为进一步沉积银和DT改性的平台，由此获得的超疏水样品可用于解决太阳能蒸发和油水分离等海洋问题。
Polydopamine (PDA) inspired by mussel plays a unique role in surface modification due to its strong adhesion to virtually all kinds of materials and the subsequent functionality. However, the deposition of PDA and its subsequent metallization in bulk solution is slow and thus the surface modification based on PDA is not efficient. Herein, by atmospheric deposition with the aid of ultraviolet (UV) irradiation, a process is proposed to facilitate the fast deposition of PDA and silver nanpparticles (Ag NPs) on cotton fabric. The word “fast” means that efficiency of the overall deposition is increased by 45 times. Fabric with PDA and Ag NPs is further modified by dodecyl mercaptan (DT) and turns to be superhydrophobic. Ag NPs play multiple roles in the fabrication and application of the superhydrophobic fabric, viz., enhancing the hydrophobicity and photothermal effect of the fabric. Due to its superhydrophobicity and excellent photothermal effect, the fabric floating on water can harvest solar energy to facilitate the local evaporation of seawater. The evaporation rate is 1.66 kg/(m2·h) and the solar energy conversion efficiency is 91%. As the oil–water separation membrane, the separation efficiency of oil–water mixture is more than 96%, and the oil flux is more than 12 m3·m−2·h−1. Overall, this is a story from sea to sea. PDA inspired by the sea creature of mussel is quickly deposited on the fabric and serves as a platform for further deposition of silver and modification with DT, and the so-obtained superhydrophobic sample can be used to solve the marine problems such as solar evaporation and oil/water separation.