Issue 17, 2024

Enhancing biofouling resistance in microfiltration membranes through capsaicin-derivative functionalization

Abstract

The primary focal point in the fabrication of microfiltration membranes revolves around mitigating issues of low permeability stemming from the initial design as well as countering biofouling tendencies. This work aimed to address these issues by synthesizing an antibacterial capsaicin derivative (CD), which was then grafted to the poly(vinylidene fluoride-co-chlorotrifluoroethylene)-g-polymethacrylic acid (P(VDF-CTFE)-g-PMAA) matrix polymer, resulting in an antibacterial polymer (PD). Notably, both CD and PD demonstrated low cytotoxicities. Utilizing PD, a microfiltration membrane (MA) was successfully prepared through non-solvent-induced phase inversion. The pore sizes of the MA membrane were mainly concentrated at around 436 nm, while the pure water flux of MA reached an impressive value of 62 ± 0.17 Lm−2 h−1 at 0.01 MPa. MA exhibited remarkable efficacy in eradicating both Gram-negative (E. coli) and Gram-positive bacteria (Bacillus subtilis) from its surface. Compared with M1 prepared from P(VDF-CTFE), MA exhibited a lower flux decay rate (41.00% vs. 76.03%) and a higher flux recovery rate (84.95% vs. 46.54%) after three cycles. Overall, this research represents a significant step towards the development of a microfiltration membrane with inherent stable anti-biofouling capability to enhance filtration.

Graphical abstract: Enhancing biofouling resistance in microfiltration membranes through capsaicin-derivative functionalization

Supplementary files

Article information

Article type
Paper
Submitted
06 Jan 2024
Accepted
28 Mar 2024
First published
01 Apr 2024

J. Mater. Chem. B, 2024,12, 4208-4216

Enhancing biofouling resistance in microfiltration membranes through capsaicin-derivative functionalization

S. Yan, Q. Ye, J. Wu, W. Yao, B. Chen and X. Zhu, J. Mater. Chem. B, 2024, 12, 4208 DOI: 10.1039/D4TB00033A

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