【作者】 黄占华； 方桂珍； 张斌； 刘凯；

【Author】 Zhan-Hua Huang, Gui-zhen Fang, Bin Zhang, Kai Liu Northeast Forestry University, Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, 150040,Harbin

【机构】 东北林业大学生物质材料科学与技术教育部重点实验室；

【Abstract】 Synthetical techniques for carboxymethyl larch tannin such as reaction temperature, distribution time, concentration of alkalizer were investigated. The optimum synthesis conditions were obtained. FTIR and EA were applied to analysis changes in structures of larch tannins. Antibacterial experiment indicated carboxymethyl larch tannin showed an obvious inhibition effect on Bacillus aureus , Escherichia coli and Staphylococcus aureus, with MIC of 62.5 μg/mL and MBC of 125 μg/mL on Bacillus aureus, which is quarter to half of Escherichia coli and Staphylococcus aureus separately, showing a higher antibacterial rate than larch tannin.One of the important approach of larch tannin fine utilize is chemical modify.更多还原