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《Chemistry and Industry of Forest Products》 2009-03
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Preparation and Properties of Modified Rosin-condensed Tannins Esters

DUAN Wen-gui1,GENG Zhe1,ZHANG Jia-yan2,SHEN Chang-mao1(1.College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China; 2.Faculty of Wood Science and Decoration Engineering,Southwest Forestry College,Kunming 650224,China)  
Under microwave irradiation and in the presence of pyridine as catalyst,a series of modified rosin-condensed tannins esters were synthesized by O-acylation reaction between condensed tannins and modified rosin chloride. The target products were analyzed and characterized by means of UV,IR,TG-DTA and elemental analysis. In addition,antioxidant activity and surface activity of the esters were determined. The test results showed that modified rosin-condensed tannins esters have better oil-solubility in peanut oil and better antioxidant activity than those of condensed tannins,and that of dehydroabietic acid-condensed tannins ester (DHA-MET) was the best of all. The surface activity was evaluated by surface tension,emulsifying power and foaming ability. The results indicated that sodium salts of the modified rosin-condensed tannins esters,especially sodium salts of the hydrogenated rosin-condensed tannins esters,had the superior surface activity.
【Fund】: 教育部留学回国人员科研启动基金资助项目(教外司留[2005]383号)
【CateGory Index】: TQ351.471
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