Bio-inspired cotton fabric with superhydrophobicity for high-efficiency self-cleaning and oil/water separation
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ORIGINAL RESEARCH
Bio-inspired cotton fabric with superhydrophobicity for high-efficiency self-cleaning and oil/water separation Ruiyang Lu . Yucong Yu . Gafurov Adkhamjon . Wenli Gong . Xiaoqing Sun . Lin Liu
Received: 5 March 2020 / Accepted: 3 June 2020 Ó Springer Nature B.V. 2020
Abstract In this paper, a facile and efficient approach to robust and durable superhydrophobic cotton fabric was presented via in situ CuO deposition and stearic acid (STA) coating. The combined effects of both rough structure and low surface energy endowed cotton fabric (Cot) with superhydrophobicity, water repellency, and self-cleaning property. Moreover, the as-prepared fabric (Cot–CuO–STA) could keep its robust superhydrophobicity under harsh environmental conditions of acidic, alkaline and salt solutions, high temperature, mechanical abrasion and washing. Importantly, the obtained Cot–CuO–STA with WCA of 156.5° had great potential in oil/water
separation with high separation efficiency of up to 98.7% for various oils (dichloromethane, trichloromethane, soybean oil, and n-heptane). Further, fascinating permeate flux (more than 1800 L.m-2.h-1) and remarkable recyclability made Cot–CuO–STA a promising application in oil-contaminated water treatment and marine spilt oil cleanup. Graphic abstract Robust and durable superhydrophobic cotton fabric was fabricated for oil/water separation via a facile and efficient route. The resultant fabric exhibited remarkable separation efficiency for different kinds of oils, fascinating permeate flux, and excellent recyclability.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03281-9) contains supplementary material, which is available to authorized users. R. Lu G. Adkhamjon W. Gong X. Sun L. Liu (&) School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China e-mail: [email protected] Y. Yu L. Liu National Engineering Lab of Textile Fiber Materials and Processing Technology, Hangzhou 310018, China
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Cellulose
Keywords Cotton fabric Superhydrophobicity Durability Hierarchical structure Oil/water separation Recyclability
Introduction Inspired by amazing organisms in nature, such as lotus leaves (Yang et al. 2018; Farhadi et al. 2011) and gecko feet (Pokroy et al. 2009), superhydrophobic materials with low surface energy and hierarchical micro/nanostructure have attracted attention and interest because of their practical applications in self-cleaning (Yang et al. 2019; Gelebart et al. 2017), anticorrosion (Lvov et al. 2016; Zhao et al. 2017), antifouling (Qing et al. 2019; Fisher et al. 2018), antiicing (Liu et al. 2014; Li et al. 2019) and oil/water separation (Wang et al. 2015; Liu et al. 2019a, b, c). To date, numerous methods have been exploited to obtain artificial superhydrophobic surfaces, such as sol–gel method (Lin et al. 2019; Liu et al. 2018), chemical vapor deposition (Cheng et al. 2019; Zhang et al. 2011), template pro
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