Preparation and properties of quaternary ammonium chitosan-g-poly(acrylic acid-co-acrylamide) superabsorbent hydrogels
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- 作者：Guanghua He ; kjtsys@163.com ; Wanwan Ke ; Xiang Chen ; Yahui Kong ; Hua Zheng ; Yihua Yin ; Weiquan Cai
- 关键词：Superabsorbent hydrogels ; Quaternary ammonium chitosan ; Water absorbency ; Mechanical property ; Antibacterial activity
- 刊名：Reactive and Functional Polymers
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：111
- 期：Complete
- 页码：14-21
- 全文大小：1548 K
- 卷排序：111
文摘
Quaternary ammonium chitosan-g-poly(acrylic acid-co-acrylamide) superabsorbent hydrogels were successfully synthesized from acrylic acid (AA), acrylamide (AM) and quaternary ammonium chitosan with high substitution degree. They were prepared using potassium persulfate (KPS) as an initiator and N,N′-methylenebisacrylamide (MBA) as a crosslinker respectively. The structure and morphology of the superabsorbent hydrogel were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The water absorbency and antibacterial activities of the superabsorbent hydrogels against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were investigated. The introduction of quaternary ammonium chitosan made the antibacterial activity improve. The crosslinker, initiator and AM contents had certain influences on the water absorbency as well as the antibacterial activity against E. coli. The AM could enhance the hydrogel strength apparently. In addition, the AM (the content was 10 wt%) could increase the water absorbency in 0.9 wt% NaCl solution obviously. The superabsorbent hydrogel also had pH sensitive property.