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Published in: Cellulose 13/2021

20-07-2021 | Original Research

Superhydrophobic and photocatalytic self-cleaning cotton fabric using flower-like N-doped TiO2/PDMS coating

Authors: Esfandiar Pakdel, Hai Zhao, Jinfeng Wang, Bin Tang, Russell J. Varley, Xungai Wang

Published in: Cellulose | Issue 13/2021

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Abstract

Self-cleaning fabrics can be developed based on introducing two mechanisms of superhydrophobicity and photocatalytic activity to conventional fabrics. However, there are some downsides such as inefficiency of superhydrophobic coatings against oily contaminants and low effectiveness of photocatalytic surface treatments under visible light which have restricted the widespread applications of these functional products. This research presents the development of self-cleaning cotton fabric with dual functionalities of superhydrophobicity and photocatalytic activity using microhierarchial TiO2-based particles. It is aimed to fabricate fluorine-free durable superhydrophobic coatings with simultaneous photocatalytic self-cleaning under simulated sunlight. Fluorine-free coating formulations composed of flower-like particles, either TiO2 or nitrogen-doped TiO2, and polydimethyl siloxane (PDMS) polymer were applied to cotton fabrics using a facile dip-coating method. The self-cleaning performance of fabrics was assessed based on their superhydrophobicity and effective removal of oil-based stains under simulated sunlight. Additionally, the impact of nitrogen doping on enhancing the photocatalytic activity of flower-like TiO2 particles was investigated. The obtained results demonstrated that the presence of both PDMS and hierarchical particles generated excellent superhydrophobicity on the cotton fabric with a water contact angle of 156.7° ± 1.9°. In addition, the coated fabric exhibited highly efficient photocatalytic activity, decomposing absorbed stains after 30  min of irradiation. Nitrogen doping process significantly boosted the photocatalytic activity of TiO2 particles in degrading food stains and Rhodamine B dye solution. The developed fabrics showed high robustness against chemical and physical durability tests.

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Literature
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go back to reference Zhou P, Lv J, Xu H, Wang X, Sui X, Zhong Y, Wang B, Chen Z, Feng X, Zhang L, Mao Z (2019) Functionalization of cotton fabric with bismuth oxyiodide nanosheets: applications for photodegrading organic pollutants, UV shielding and self-cleaning. Cellulose 26(4):2873–2884. https://doi.org/10.1007/s10570-019-02281-8CrossRef Zhou P, Lv J, Xu H, Wang X, Sui X, Zhong Y, Wang B, Chen Z, Feng X, Zhang L, Mao Z (2019) Functionalization of cotton fabric with bismuth oxyiodide nanosheets: applications for photodegrading organic pollutants, UV shielding and self-cleaning. Cellulose 26(4):2873–2884. https://​doi.​org/​10.​1007/​s10570-019-02281-8CrossRef
Metadata
Title
Superhydrophobic and photocatalytic self-cleaning cotton fabric using flower-like N-doped TiO2/PDMS coating
Authors
Esfandiar Pakdel
Hai Zhao
Jinfeng Wang
Bin Tang
Russell J. Varley
Xungai Wang
Publication date
20-07-2021
Publisher
Springer Netherlands
Published in
Cellulose / Issue 13/2021
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-021-04075-3

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