生物质化学工程2016，Vol.50Issue(5)：12-16,5.DOI:10.3969/j.issn.1673-5854.2016.05.003
微波辅助羟甲基化改性木质素的制备及其结构表征
P reparation and Structural Characterization of Hydroxymethylated Lignin Assisted by Microwave Irradiation
摘要
Abstract
In order to improve the utilization efficiency and reactivity of lignin,the hydroxymethylate modification was carried out under microwave heating. The reaction conditions were optimized by measuring the amount of formaldehyde consumption. The optimal reaction conditions were 80℃,pH value 10.5 and reaction time 30 min.The reaction time of microwave heating could be shortened compared with the conventional method and the efficiency of the hydroxymethylate modification of lignin could be improved significantly.The lignin and modified lignin were characterized by Fourier transform infrared spectroscopy(FT-IR), nuclear magnetic resonance hydrogen spectrum(1H NMR) and gel permeation chromatograph(GPC).The results showed that the content of hydroxyl group and reactive activity of modified lignin increased. The number-average molecular weight ( Mn ) and weight-average molecular weight ( Mw ) of acetylated hydroxymethylation lignin increased, as well as the molecular weight distribution(Mw/Mn) tended to be wider compared with those of the acetylated lignin.关键词
木质素/微波加热/羟甲基化/结构表征Key words
lignin/microwave heating/hydroxymethylation/structural characterization分类
化学化工引用本文复制引用
夏成龙,郭腾飞,许玉芝,王春鹏..微波辅助羟甲基化改性木质素的制备及其结构表征[J].生物质化学工程,2016,50(5):12-16,5.基金项目
林业公益性行业专项(201404604) （201404604）
国家自然科学基金资助项目(31200448) （31200448）
车用生物燃料技术国家重点实验室开放基金资助项目( KFKT2013011) （ KFKT2013011）
