福建农林大学学报（自然科学版）2025，Vol.54Issue(3)：401-409,9.DOI:10.13323/j.cnki.j.fafu(nat.sci.).202405011
硫醇化木质素制备及其对聚氨酯性能的影响
Preparation of thiolated lignin and its effect on the property of polyurethane
摘要
Abstract
[Objective]The study aimed to improve the alcoholic hydroxyl content in lignin and its reactivity,so as to provide basis for its efficient application on polyurethane materials.[Method]Hydrothermal depolymerization and thiol-ene click chemistry modifi-cation were combinedly used to study the effect of partial substitution of polyether polyols with lignin on the property of polyurethane.[Result]After the click chemistry modification,the alcoholic hydroxyl content of lignin was increased by 81.76％,and its successful thiolation modification was confirmed by Fourier infrared spectroscopy test analysis.Thermal gravimetric analysis showed improved thermal stability of the thiolated lignin.With Flynn-Wall-Ozawa integration method,the activation energy of original lignin and thio-lated lignin were detected at 101.95 and 110.73 kJ·mol-1,respectively.When the thiolated lignin was substituted at 4％,the ap-parent density,compression strength and thermal conductivity of polyurethane foam were 0.436 g·cm-3,7.79 MPa and 0.083 0 W·m-1·K-1.[Conclusion]Through hydrothermal depolymerization and thiol-ene click chemistry modification,the alcoholic hy-droxyl content and reactivity of lignin were improved,which was subsequently contributed to the preparation of polyurethane foam material with excellent performance.关键词
硫醇化/木质素基聚氨酯/点击化学/Flynn-Wall-Ozawa积分法/反应动力学Key words
thiolation/lignin-based polyurethane/click chemistry/Flynn-Wall-Ozawa integration method/reaction kinetics分类
化学化工引用本文复制引用
巫来秀,方娟,谭非..硫醇化木质素制备及其对聚氨酯性能的影响[J].福建农林大学学报（自然科学版）,2025,54(3):401-409,9.基金项目
国家自然科学基金项目(31000269). （31000269）
