Effects of steam-explosion pretreatment on chemical constitute and fiber conformation of bamboo

Steam-explosion pretreatment technology was used for pretreating the bamboo in this paper.The difference of the chemical composition and fiber morphology of bamboo before and after the explosion was stud-ied,and the degraded products were analyzed by using the gas chromatography-mass spectrometry(GC-MS).Results showed:(1)After steam-explosion pretreatment,holocellulose content was substantially reduced,while cellulose content was relatively increased and the lignin content had a little change;(2)After steam-explosion pre-treatment,the fiber length was reduced;others were some debris and cracks on the fiber surface,and the crystal-linity of the cellulose were increased obviously after steam-explosion;(3) Thirty-two compounds were identified in the steam-explosion liquid of bamboo extracted by ethyl acetate,and diethyl-pentanedioic acid ester was the main compound.