蔗渣纤维炭化特性及不同预处理方法的影响研究

摘要

The carbonization properties of bagasse fiber were studied at different heating rate and under different atmosphere.The influence of different pretreatment methods on the carbonization properties of bagasse fiber and the morphology structure of bagasse carbon materials were researched by using thermogravimetric analyzer (TG) and scanning electron microscopy (SEM).The decomposition temperature of BF in nitrogen atmosphere increased with the heating rate increased.The decomposition temperature of BF in air atmosphere was 347 ℃ lower than 372C in nitrogen atmosphere.The bagasse fiber composition was different with different pretreatment methods,leading to the different decomposition temperature of carbonization process.The different bagasse carbon materials remained good fiber structure,and the fiber diameter mainly depended on the diameter of bagasse fiber before carbonized.The preparation of carbon fiber materials with bagasse fiber was completely feasible,and the pretreatment method can control the preparation of different carbon fiber materials.%以蔗渣纤维为生物质原料,通过热重分析仪和扫描电镜,考察不同升温速率、不同气氛下蔗渣纤维的炭化特性.研究不同预处理方法对蔗渣纤维炭化特性的影响及蔗渣基炭材料的形貌结构.随着升温速率增加,蔗渣纤维在氮气氛下炭化过程的最大失重速率对应的热分解温度明显升高.蔗渣纤维在空气氛下的最大失重速率对应的温度为347℃,低于氮气氛下最大失重速率对应的温度372℃.不同的预处理方法对蔗渣纤维的成分比例影响略有不同,导致炭化过程的热分解温度有所差别.不同的预处理方法得到的蔗渣纤维在炭化后都保持很好的纤维结构,其纤维直径主要取决于炭化前蔗渣纤维的直径.蔗渣纤维制备炭纤维材料完全可行,对预处理方法调控可以制备不同的炭纤维材料.