精制木质素改性聚氨酯发泡材料  

Lignin Modified Polyurethane Foam Material

作　　者：庞绪富 姜贵全[1] 张洪鸣 高天意 庞久寅[1] PANG Xu-fu;JIANG Gui-quan;ZHANG Hong-ming;GAO Tian-yi;PANG Jiu-yin(Wood Material Science and Engineering Key Laboratory of Jilin Province,Beihua University,Jilin 132013,China)

机构地区：[1]北华大学木质材料科学与工程重点实验室,吉林吉林132013

出　　处：《包装工程》2021年第7期85-90,共6页Packaging Engineering

基　　金：吉林省科学技术厅项目(20190301045NY)。

摘　　要：目的为了提高精制木质素的提取率,改善聚氨酯发泡材料的力学性能,增强木质素的利用率,降低聚氨酯发泡材料的生产成本,扩大使用范围。方法通过碱溶酸析、液-液提取及超滤膜过滤处理工艺获取精制木质素,采用预聚体法合成精致木质素基聚氨酯发泡材料。结果当NaOH溶液浓度为2.5 mol/L时,提取率最高;H2SO4浓度对提取率无明显影响;精制木质素的添加增大了泡沫密度,提高了压缩强度和拉伸强度。结论当精制木质素质量分数为10%、二月桂酸二丁基锡质量为0.24 g、三乙醇胺质量为0.04 g时,制备的精制木质素基聚氨酯发泡材料的性能相对最优。Refined lignin is prepared from industrial alkali lignin obtained from papermaking black liquor,the influence of NaOH solution concentration and H2SO4 concentration on the extraction rate of refined lignin is explored,and the foam density and compressive strength of refined lignin-based polyurethane foam materials are explored.Tensile strength improves the extraction rate of refined lignin,refined lignin improves the mechanical properties of polyurethane foam materials,enhances the utilization rate of lignin,reduces the production cost of polyurethane foam materials,and expands the scope of use.Refined lignin is obtained through alkali-dissolving acid precipitation,liquid-liquid extraction and ultrafiltration membrane filtration treatment process,and the refined lignin-based polyurethane foam material is synthesized by the prepolymer method.When the concentration of NaOH solution is 2.5 mol/L,the extraction rate is the highest;the concentration of H2SO4 has no obvious effect on the extraction rate;the addition of refined lignin increases the foam density and improves the compressive and tensile strength.When the mass fraction of refined lignin is 10%,the mass of dibutyltin dilaurate is 0.24 g,and the mass of triethanolamine is 0.04 g,the performance of the refined lignin-based polyurethane foam material is optimal.

关 键 词：木质素 聚氨酯 力学性能 

分 类 号：TB484[一般工业技术—包装工程] O636.2[理学—高分子化学]