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Fast fabrication of superabsorbent polyampholytic nanocomposite hydrogels via plasma‐ignited frontal polymerization
Authors:Huan Shao  Cai‐Feng Wang  Su Chen  Chen Xu
Institution:1. State Key Laboratory of Materials‐Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, , Nanjing, 210009 People's Republic of China;2. State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, , Nanjing, 210093 People's Republic of China
Abstract:We report the facile synthesis of poly(VI‐co‐MAA) superabsorbent polyampholytic hydrogels (VI = N‐vinylimidazole, MAA = methacrylic acid) via plasma‐ignited frontal polymerization (PIFP). On igniting the top surface of the reactants with air plasma, frontal polymerization occurred and poly(VI‐co‐MAA) hydrogels were obtained within minutes. The preparation parameters were investigated, along with swelling capacity, morphology, and chemical structures of poly(VI‐co‐MAA) hydrogels. Interestingly, the hydrogels are superabsorbent in water and show ampholytic characteristic toward pH. Moreover, the hydrogels are able to capture cationic dyes through electrostatic interaction, offering the potential for further development as dye adsorbents for water purification. In addition, nanocomposite hydrogels were obtained by embedding quantum dots (carbon dots or CdS nanocrystals) into the polymer matrix, which endows the nanocomposite hydrogels with favorable fluorescence and potential applications in bioimaging and biosensing. The results indicate that FP can be applied as an alternative means for facile synthesis of multifunctional hydrogels with additional efficiency and energy‐saving. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52, 912–920
Keywords:adsorption  carbon dots (CDs)  fluorescence  hydrogels  nanocomposites  plasma‐ignited frontal polymerization (PIFP)  plasma polymerization  polyampholytic  superabsorbent
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