Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (5): 902.doi: 10.7503/cjcu20160626

• Polymer Chemistry • Previous Articles    

Preparation of Cu2+-Chitosan Quaternary Ammonium Salt-g-Poly(acrylicacid) with Efficient Antibacterial Activity

LI Hui, XING Zhe, LI Rong, ZHANG Mingxing, WANG Minglei, TAN Yizhe, WU Guozhong   

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2016-09-05 Revised:2017-04-21 Online:2017-05-10 Published:2017-04-20
  • Supported by:

    Supported by the Shanghai Agriculture Applied Technology Development Program, China(No.G20140308).

Abstract:

Acrylic acid(AAc) was grafted to chitosan quaternary ammonium salt(HACC) by ammonium persulfate as an initiator. HACC-g-PAAc-Cu2+ with efficient antibacterial activity was further prepared through complexation of Cu2+ with HACC-g-PAAc. The chemical structure of the grafted HACC was characterized by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance(1H NMR). The capacity of grafted HACC loading Cu2+ was determined by ultraviolet-visible spectroscopy(UV-Vis) and thermagravimetric analysis(TGA). Antimicrobial property of HACC-Cu2+ and HACC-g-PAAc-Cu2+ against staphylococcus aurous(S. Aurous) and E. coli bacillus were tested. Toxicity for oral intake of mice and coating irritation on rabbit skin of HACC-Cu2+ and HACC-g-PAAc-Cu2+ were also evaluated. The property of antibacterial and capacity of complexing Cu2+ can be improved by grafting of AAc. The molar ratio of Cu2+/HACC increased from 3:7 before grafting to 1:1 after grafting. The minimum inhibitory concentration(MIC) of S. Aurous and E. coli bacillus decreased from 60 mg/L to 9.2 mg/L and 37 mg/L to 6.3 mg/L. Moreover, HACC-Cu2+ and HACC-g-PAAc-Cu2+ have no toxic ingestion and skin irritation.

Key words: Chitosan quaternary ammonium salt, Cupric ion, Antibacterial property, Acrylic acid

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