二乙烯三胺基蔗渣碱木质素的制备

摘要

以二乙烯三胺和甲醛对蔗渣碱木质素进行改性,对工艺参数进行优化.结果表明,当温度80℃,时间4 h,m(木质素)∶m(二乙烯三胺)=1∶1.5,n(二乙烯三胺)∶n(甲醛)=1∶3,含氮量最大为7.1％,二乙烯三胺和甲醛的物质的量之比对含氮量的影响显著.红外光谱和扫描电镜-能谱仪的测试结果表明,改性后亚甲基和胺基被引入木质素结构中,表面形貌由球状变为块状.%Diethylenetriamine and formaldehyde modified bagasse soda and optimized the process parameters.The results showed that the supreme nitrogen content was 7.1％after the optimal conditions were determined as temperature 80℃, reaction time 4 h, the mass ratio of lignin and diethylenetriamine 1∶1.5, the molar ratio of diethylenetriamine and formaldehyde 1∶3.The molar ratio of diethylenetriamine and formaldehyde was the main affecting factor on the nitrogen content.Methylene and amino were successfully introduced into the basic structure unit of lignin and the surface morphology transformed from spheres to clumps with the help of Fourier transform infrared spectroscopy (FTIR) and Scanning electron microscope-Energy dispersive spectroscopy (SEM-EDS).