ZnO nanoparticles coated and stearic acid modified superhydrophobic chitosan film for self-cleaning and oil-water separation.

Mengting Yu, Lu Yang, Limei Yan, Tao Wang, Yanfei Wang, Yang Qin, Liu Xiong, Rui Shi, Qingjie Sun

International journal of biological macromolecules 2023 Mar 15

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The aim of this study was to prepare superhydrophobic chitosan films using a ZnO nanoparticle coating and stearic acid hydrophobic modification. A 1 % concentration of ZnO nanoparticles and a 1 % concentration of stearic acid generated a superhydrophobic film with the largest contact angle (WCA) of 156°, which was attributed to the synergy of micro/nano-level hierarchical structure and low surface energy modification. The superhydrophobic film showed better stability to acid, alkali, heat, and UV irradiation than a neat chitosan film and a reduction in light transmittance of 14.4 % at 354 nm. The superhydrophobic chitosan film also showed excellent self-cleaning and oil-water separation performance. Our findings will expand the application of chitosan films in food packaging, outdoor self-cleaning materials and oil-water separations. Copyright © 2023 Elsevier B.V. All rights reserved.

Citation

Mengting Yu, Lu Yang, Limei Yan, Tao Wang, Yanfei Wang, Yang Qin, Liu Xiong, Rui Shi, Qingjie Sun. ZnO nanoparticles coated and stearic acid modified superhydrophobic chitosan film for self-cleaning and oil-water separation. International journal of biological macromolecules. 2023 Mar 15;231:123293