大连工业大学学报2024，Vol.43Issue(4)：261-264,4.DOI:10.19670/j.cnki.dlgydxxb.2024.0405
木质素多元醇的制备及表征
Preparation and characterization of lignin polyols
摘要
Abstract
Lignin polyols were prepared using lignin as raw material,a mixture of small molecule alcohols as liquefaction agent,and concentrated phosphoric acid as catalyst.The influences of liquefaction agent ratio,liquid solid ratio(mass ratio of liquefaction agent to lignin),reaction temperature on liquefaction rate were investigated.The optimal process for preparing lignin polyols has been determined as follow:the mass ratio of liquefied agent 1,2-propanediol to glycerol of 5∶5,the liquid-solid ratio of 13∶1,the reaction temperature of 170 ℃,and the liquefaction rate could reach 99.69％.Under the optimal conditions,the hydroxyl value,acid value and viscosity of lignin polyol were 2 213.74 mg/g,40.07 mg/g and 947 mPa·s,respectively.The structure and properties detected by infrared spectroscopy and SEM showed that lignin was degraded during the liquefaction process.The rheological performance analysis results indicated that lignin polyols exhibited a phenomenon of shear thinning.关键词
木质素/多元醇/假塑性流体Key words
lignin/polyol/pseudoplastic fluid分类
化学化工引用本文复制引用
刘灵芝,夏英..木质素多元醇的制备及表征[J].大连工业大学学报,2024,43(4):261-264,4.基金项目
辽宁省教育厅科学研究经费项目(面上项目)(LJKZ0513) （面上项目）
辽宁省"兴辽英才计划"项目(LYC1906017). （LYC1906017）
