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Issue 8, 2014
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Multifunctional photo-crosslinked polymeric ionic hydrogel films

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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

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Publication details

The article was received on 12 Dec 2013, accepted on 07 Jan 2014 and first published on 08 Jan 2014


Article type: Paper
DOI: 10.1039/C3PY01708G
Citation: Polym. Chem., 2014,5, 2824-2835
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    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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