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Functionalization of chitosan via single electron transfer living radical polymerization in an ionic liquid and its antimicrobial activity
Author(s) -
Lin Chunxiang,
Liu Danhui,
Luo Wei,
Liu Yifan,
Zhu Moshuqi,
Li Xiaojuan,
Liu Minghua
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42754
Subject(s) - chitosan , polymer chemistry , dispersity , copolymer , materials science , polymerization , radical polymerization , ionic liquid , surface modification , fourier transform infrared spectroscopy , living polymerization , polymer , chemical engineering , chemistry , organic chemistry , catalysis , composite material , engineering
In this work, single electron transfer living radical polymerization (SET‐LRP) was used to functionalize chitosan in a well‐controlled manner. The chitosan‐based macroinitiator was first synthesized and then initiated the SET‐LRP of methacryloyloxyethyl trimethylammonium chloride (DMC) in ionic liquid system, using Cu 0 / N , N , N ′, N ′, N ′′‐pentamethyldiethylenetriamine as a catalyst. The grafting of PDMC brushes on chitosan was confirmed and analyzed by Fourier transform infrared spectroscopy and 1 H nuclear magnetic resonance. Transmission electron microscopy reveals that the chitosan copolymer showed self‐assembled behavior in acetone. Surface properties of the copolymer have been investigated by environment scanning electron microscopy analysis. The linear relationship between the ln([ M ] 0 /[ M ] t ) and time, the linear increase of number‐average molecular mass with conversion as well as the low polydispersity index of the polymer confirmed the “living/controlled” features of the polymerization of DMC through SET‐LRP. Finally, the chitosan copolymer demonstrates its potential antibacterial application, showing excellent inhibitive capability against Escherichia coli . © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42754.