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Durable hydrophobic and antibacterial textile coating via PDA/AgNPs/ODA in situ assembly

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Abstract

Antibacterial textiles cannot prevent the dirty liquid containing bacteria from passing through the fabrics to reach the human skin, and cannot effectively protect human health. To enhance the antibacterial function of the fabric, a dual-function cotton fabric with hydrophobic and antibacterial properties, cotton@PDA@AgNPs@ODA, was prepared via in situ surface assembly of polydopamine (PDA), Ag nanoparticles (AgNPs) and octadecylamine (ODA). Polydopamine (PDA) was deposited on raw cotton fabric. AgNPs were introduced to the surface PDA coating of the fabric by in situ reduction of AgNO3 with reducibility of catechol moieties in PDA. Subsequently, octadecylamine (ODA) was grafted onto PDA by Michael addition/Schiff base reaction. Water contact angle of Cotton@PDA@AgNPs@ODA was 130° at 10 min of drop contact time, showing good hydrophobicity. The antibacterial rates of Cotton@PDA@AgNPs@ODA against Escherichia coli and Staphylococcus aureus were above 99%, and the modified fabric had good bacterial liquid shielding function. Furthermore, the PDA/AgNPs/ODA coating had good fastness under washing, mechanical abrasion and strong acid/alkaline conditions.

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Acknowledgments

This research work was supported by the National Natural Science Foundation of China (51603087), China Postdoctoral Science Foundation (2017M611697), Jiangsu Planned Projects for Postdoctoral Research Funds (1701022A).

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All authors contributed to the study conception and design. The first draft of the manuscript was written by WC under supervision from YY and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Yuanyuan Yu.

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Informed consent was obtained from all individual participants included in the study.

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Cheng, W., Liu, W., Wang, Q. et al. Durable hydrophobic and antibacterial textile coating via PDA/AgNPs/ODA in situ assembly. Cellulose 29, 1175–1187 (2022). https://doi.org/10.1007/s10570-021-04339-y

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  • DOI: https://doi.org/10.1007/s10570-021-04339-y

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