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以毛竹为研究对象,采用蒸汽爆破法进行预处理并对爆破前后化学组成和纤维形态的变化进行分析,以及GC-MS技术对爆破后的降解产物进行鉴定。结果表明:(1)蒸汽爆破预处理使得半纤维素含量大幅度降低,纤维素含量相对增加,木质素含量稍有变化;(2)爆破后纤维长度降低,纤维表面明显有碎片和裂纹,爆破后的纤维相对结晶度明显提高;(3)毛竹爆破液的乙酸乙酯萃取物中,共鉴别出以戊二酸二乙酯为主的32种化合物。
Taking bamboo as the research object, the steam explosion method was used to pretreat the samples and analyze the changes of chemical composition and fiber morphology before and after blasting. The degradation products after blasting were identified by GC-MS. The results showed that: (1) steam explosion pretreatment resulted in a significant decrease of hemicellulose content, relative increase of cellulose content and slight change of lignin content; (2) decrease of fiber length after blasting, obvious fragments and cracks on fiber surface, The relative crystallinity of the fiber increased significantly; (3) 32 kinds of compounds mainly composed of diethyl glutarate were identified in the ethyl acetate extract of the bamboo blasting liquid.