Enhancing the Antimicrobial and Anti-biofouling Properties of Polyamide Composite Membrane Grafted with Polyhexamethylene Guanidine (PHMG)

Nguyen Son Duong, Duong Xuan Quan, Gundsambuu Narantsatsralt, Vu Van Nhan, Nguyen Pham Ham, Ngo Hong Anh Thu

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Published Jun 20, 2023
DOI: https://doi.org/10.25073/2588-1140/vnunst.5562

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DUONG, Nguyen Son et al. Enhancing the Antimicrobial and Anti-biofouling Properties of Polyamide Composite Membrane Grafted with Polyhexamethylene Guanidine (PHMG). VNU Journal of Science: Natural Sciences and Technology, [S.l.], june 2023. ISSN 2588-1140. Available at: <https://js.vnu.edu.vn/NST/article/view/5562>. Date accessed: 03 may 2024. doi: https://doi.org/10.25073/2588-1140/vnunst.5562.
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Abstract

In this work, a thin-film composite polyamide membrane with antimicrobial polyhexamethylene guanidine (PHMG) was fabricated by the combination of photo-induced and chemical grafting to enhance the antifouling and anti-biofouling properties of the membrane. The surface properties of the membrane were evaluated using field-emission scanning electron microscopy (FE-SEM) images, attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), water contact angle (WCA) values, and antimicrobial activity of the membrane. The membrane separation performance was evaluated by the flux and the ability to retain Ca2+ ions in water. The antifouling and anti-biofouling properties were evaluated by the maintained flux ratios after 9 hour-filtration of humic acid and bovine serum albumin (BSA) solutions. The results showed that the grafted membrane’s surface became tighter (the retention increased from 97.3% to 98.6%), and no bacteria were observed on the surface of the grafted membrane. Meanwhile, the anti-fouling and anti-biofouling properties were also improved compared to the original membrane.

Keywords: Thin-film composite polyamide membrane, PHMG, UV-induced graft polymerization, antifouling, anti-biofouling.

References

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