A Versatile Method to Construct Superhydrophobic Fabrics with Good Durability and Self-cleaning Performance
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ISSN 1229-9197 (print version) ISSN 1875-0052 (electronic version)
A Versatile Method to Construct Superhydrophobic Fabrics with Good Durability and Self-cleaning Performance Maiping Yang1,2,3, Weiqu Liu1,2*, Liyan Liang1,2*, Chi Jiang1,2,3, Yankun Xie1,2,3, Hongyi Shi1,2,3, Fengyuan Zhang1,2,3, and Ke Pi1,2 1
Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China 3 University of Chinese Academy of Sciences, Beijing 100049, China (Received September 3, 2019; Revised October 18, 2019; Accepted December 6, 2019)
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Abstract: In this paper, various fabrics with good self-cleaning performance were prepared via a facile dip-coating method. The fabrics composed with different fibers and woven techniques were firstly immersed in ZnO sol to increase the surface roughness, then dip-coated in fluoroalkylsilane (HFT) solution to reduce the surface energy. The coated fabric showed excellent superhydrophobicity with a water contact angle (WCA) of 157.8 o and water shedding angle (WSA) of 5 o. The morphologies and chemical compositions of prepared fabrics were observed with SEM, XPS and EDS. The obtained fabric kept stable water-repelling property in acidic and alkaline solutions, solvents and UV irradiation. Benefited from its high antiwater ability and photocatalysis function of ZnO, the coated fabric demonstrated excellent self-cleaning performance. This versatile approach of constructing superhydrophobic fabrics is attractive and could be large-scaled employed in industrial production process. Keywords: Various fabrics, Superhydrophobicity, Self-cleaning, ZnO, Durability
ability, which was appreciated for outdoor applications. Deng et al. [21] reported a practical approach to produce a versatile hybrid coating for polyester-cotton textile via solgel method. The combination of SiO2, TiO2 and PDMS endowed the hydrophilic fabric with excellent superhydrophobic and photocatalysis ability. The global competition in traditional industry, especially in textile field, has intensified gradually and caused serious challenges for textile factories and workers [22]. Highperformance and functional fabrics are extremely appreciated by demanding and insightful consumer market [23]. Therefore, amounts of efforts have been devoted to develop and prepare high-value-added fabrics [24,25]. In this work, various fabrics with superhydrophobic and self-cleaning properties were constructed by the sol-gel treatment of ZnO and hydrophobization with fluoroalkylsilane (HFT). It should be noted that this simple operation by dip-coating is the most practical method to construct superhydrophobic fabrics owing to the low reliance on expensive and complex equipment. Moreover, considering the safety issue, the whole process of coating fabrics was relatively mild. No high temperature and dangerous technique were needed. Therefore, given the above-mentioned issues, the fabrication technique of superhydrophobic fab
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