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Natural pterostilbene grafted Chitosan for fabricating a durable antibacterial cotton fabric through layer-by-layer assembled coating

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Abstract

Natural antibacterial agents exhibit tremendous potential in fabricating the durable antibacterial fabrics. Herein, natural pterostilbene (PL) was grafted onto chitosan (CS) through a Mannich reaction to obtain PLCS with high antibacterial activity. Furthermore, the durable antibacterial cotton fabric was fabricated using a layer-by-layer assembled coating with PLCS as the antibacterial agent. The results showed that at a molar ratio of PL to CS of 0.2:1 and a temperature of 80 ℃, PLCS with a grafting ratio of 17.3% achieved the lowest minimum inhibitory concentrations of 33.2 and 16.6 µg/mL against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli), respectively. Compared to those of CS and PL alone, the antibacterial activity of PLCS against S. aureus improved by 67.0% and 58.5%, while the activity against E. coli improved by 94.8% and 44.7%, respectively. The antibacterial rate of the PLCS cotton fabric against S. aureus and E. coli reached up to 99.9% after three assembled layers and maintained more than 80% after 20 washings. The PLCS antibacterial fabrics exhibited good wearing safety and wearing performances.

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Funding

This work was funded by Zhejiang Provincial Natural Science Foundation of China under Grant No. LTGS23E030004 and much thanks was also given for the financial support of Tongxiang Research Institute in Zhejiang Sci-Tech University.

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LW conceived and designed the research. XZ conducted the experiments and analyzed data. HL conducted form analysis. MW edited this paper. All authors reviewed and approved the final manuscript.

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Correspondence to Lili Wang.

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Wang, L., Zhao, X., Li, H. et al. Natural pterostilbene grafted Chitosan for fabricating a durable antibacterial cotton fabric through layer-by-layer assembled coating. Cellulose 31, 661–675 (2024). https://doi.org/10.1007/s10570-023-05620-y

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  • DOI: https://doi.org/10.1007/s10570-023-05620-y

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