WATER-BASED UV-CURABLE POLYURETHANE BASED ON MODIFIED ALKALI LIGNIN OF WHEAT STRAW
This paper provided a novel method of utilizing lignin to prepare high value products.The alkali lignin of wheat straw was hydroxymethylated by formaldehyde and then used to synthesize water-based UV-curable polyurethane.The preparation of waterbased UV-curable polyurethane was completed by a three-step reaction.Besides hydroxymethylated lignin of wheat straw,toluene-2,4-diisocyanate (TDI),dimethylolpropionic acid (DMPA),2-hydroxyethyl acrylate (HEA) and polyether glycol (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,etc.were characterized.Results showed that the lignin-based polyurethanes had good hydrophilic ability and could be cured quickly under UV-light.The presence of modified lignin with a proper proportion during the synthesis had a positive effect on the tensile strength of cured film.
hydroxymethylated lignin wheat straw water-based UV-curable polyurethane alkali lignin
Fuqiang Chu Xiangjiao Wu Chuanshan Zhao
School of Light Chemical and Environmental Engineering,Shandong Polytechnic University,Jinan,250353,China
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
1267-1270
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）