Issue 8, 2014

Multifunctional photo-crosslinked polymeric ionic hydrogel films

Abstract

A facile approach was developed to prepare crosslinked ionic polymer hydrogel films by photo-crosslinking utilizing p-vinylbenzyl trimethylammonium chloride (VBTMACl) or p-vinylbenzyl trimethylammonium hydroxide (VBTMAOH) as the monomer and poly(ethylene oxide) dimethacrylate (PEODMA, Mn = 750) as the crosslinker. The films with different crosslinking degrees (20%, 40%, 60%, 80%, and 100%) were prepared and characterized by swelling measurements, scanning electron microscopy (SEM), UV-visible spectroscopy, attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), and small-angle X-ray scattering (SAXS). It was found that the mechanical and thermal properties of the films were largely influenced by the contents of the crosslinker in the films. By ion-exchange of the anions in the films with various other anions, the hydrophobicity/hydrophilicity of the films was changed. In addition, fluorescent films were prepared by treatment with fluorescein, and paramagnetic films with FeCl4 as a counter anion showed catalytic activity for Friedel–Crafts alkylation. The ionic films with quaternary ammonium chloride groups displayed antimicrobial activity against Escherichia coli (E. coli) with almost 100% killing efficiency. Multifunctional films with various tunable properties have significant potential for a wide range of applications.

Graphical abstract: Multifunctional photo-crosslinked polymeric ionic hydrogel films

Supplementary files

Article information

Article type
Paper
Submitted
12 Dec 2013
Accepted
07 Jan 2014
First published
08 Jan 2014

Polym. Chem., 2014,5, 2824-2835

Multifunctional photo-crosslinked polymeric ionic hydrogel films

H. He, B. Adzima, M. Zhong, S. Averick, R. Koepsel, H. Murata, A. Russell, D. Luebke, A. Takahara, H. Nulwala and K. Matyjaszewski, Polym. Chem., 2014, 5, 2824 DOI: 10.1039/C3PY01708G

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