分别取烘干后2-3 mg木质素及改性木质素进行元素分析,对木质素和制备得到的改性木质素C、H和N元素含量分析。其中木质素购自TCI公司,使用的气相色谱与质谱联用仪器型号为PE 2400Ⅱ(美国PE公司)的元素分析仪改性木质素制备工艺:木质素:HDI(摩尔比)=10:2,温度50℃。测试结果如图所示。
The contents of C, H and N elements of the lignin and the modified lignin were analyzed by taking 2-3 mg of dried lignin and modified lignin respectively. Among them, lignin was purchased from TCI Company, and the element analyzer of PE 2400Ⅱ (PE Company of the United States) was used to modify the lignin preparation process: Lignin: HDI (molar ratio) = 10:2, temperature 50℃. The test results are shown in the figure.