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Chemistry and Industry of Forest Products ›› 2014, Vol. 34 ›› Issue (5): 47-52.doi: 10.3969/j.issn.0253-2417.2014.05.008

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Synthesis and Performance of Dehydroabietylamine-chitosan Cationic Surfactants

PEI Li-jun1, CAI Zhao-sheng2, SHANG Shi-bin1, SONG Zhan-qian1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab.of Forest Chemical Engineering, SFA;Key Lab.of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    2. School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, China
  • Received:2013-07-17 Online:2014-10-25 Published:2015-08-18
  • Contact: 宋湛谦,中国工程院院士,研究员,博士生导师,主要从事天然产物化学研究;E-mail:songzq@hotmail.com E-mail:songzq@hotmail.com

Abstract: In this paper, the new chitosan derivatives, i.e., dehydroabietylamine-chitosan cationic surfactants(a, b and c), were synthesized with chitosan (1 000, 1 500, 3 000) and dehydroabietylamine as starting material. The cationic surfactants were characterized by FT-IR and 1H NMR , respectively. The surface activities, emulsifying properties and antibacterial properties of the products were also investigated. The results showed that the critical micelle concentrations (CMC) of a, b and c are 3.98×10-4, 2.51×10-3 and 5.01×10-3 mol/L at 25 ℃, respectively. The γcmc of a, b and c are 38.6, 36.8 and 36.6 mN/m, respectively. The emulsifying time of these three surfactants are 44, 71 and 148s, respectively. The antibacterial properties of the target products were tested with the minimum inhibitory concentration method. The preliminary result indicated that those compounds have some antibacterial activity. In particular, the antibacterial activities of the compounds a, b and c against Escherichia aerogenesare are superior to the commercially available fungicides bromogeramine and ampicillin sodium and their minimum inhibitory concentration are 2, 2 and 4 mg/L, respectively. The antibacterial activities of products would be enhanced with the increase of the DS and would be decreased with the increase of the chitosan molecular weight.

Key words: chitosan, dehydroabietylamine, surface activity, antibacterial activity

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