Antibacterial efficacy of functionalized silk fabrics by radical copolymerization with quaternary ammonium salts

Publication Type:
Journal Article
Journal of Applied Polymer Science, 2016, 133, (21), pp. n/a-n/a
Issue Date:
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Quaternary ammonium salts Quats-C8, Quats-C12, and Quats-C18 with different alkyl chain lengths have been successfully synthesized, and used for modifying silk fabrics. The optimum reaction conditions of initiator concentration, curing temperature, curing time, and monomer concentration have been studied. The modified fabrics of silk-g-C8, silk-g-C12, and silk-g-C18 were characterized by FTIR spectra. Antibacterial test showed that the modified silk fabrics possessed potent antibacterial activity against both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli. The carbon number in the alkyl chain of monomers Quats-C8, Quats-C12, and Quats-C18 can affect the antibacterial efficacy. With longer alkyl chain, the antibacterial efficacy increased. The quaternary ammonium salts-modified silk fabrics have small change on the tensile strength and wrinkle recovery angle, and have shown potential practical application.
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