WATERBORNE UV-CURABLE POLYURETHANE BASED ON LIGNIN OBTAINED FROM WHEAT STRAW BY ETHANOL EXTRACTION
The purpose of this paper is to discuss the application of ethanol-dissolved lignin in preparing high value products. Lignin was extracted from wheat straw by ethanol and used to prepare waterborne UV-curable polyurethane. The preparation of waterborne UV-curable polyurethane was completed by a three-step reaction. Besides lignin, toluene- 2, 4- diisocyanate (TDI), dimethylolpropionic acid (DMPA), 2-hydroxyethyl acrylate (HEA) and polyether diols (PPG) were used. The effect of lignin content on the synthesis process was studied. The prepared lignin polyurethane was neutralized with tertiary amine (TEA) and dispersed in water. The properties of the final product, for example, average particle size, rheological property, UV-curing ability and mechanical property, were characterized. The lignin polyurethanes could cure quickly and the presence of lignin with a proper proportion during the synthesis had a positive effect on the tensile strength of cured film.
ethanol-dissolved lignin waterborne UV-curable polyurethane property
Chu Fuqiang Zhao Jian
School of Light Chemical and Environmental Engineering, Shandong Institute of Light Industry,Jinan, State Key Laboratory of Microbial Technology,Shandong University, Jinan, 250100, China
国际会议
广州
英文
379-382
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）