闪爆对秸秆组分的解聚作用

0.9,1.2,1.6 和 2.0MPa，维压时间 270s，并对闪爆前后秸秆的化学组成和纤维形态的变化进行

分析。结果表明，闪爆预处理可使半纤维素的含量大幅度降低，纤维素含量相对增加，且随10

中图分类号：TS203 15

Abstract: Cellulose, hemicellulose and lignin are the main component of rice straw, and play an

important role in papermaking, food and chemical industry. Steam flash-explosion was employed

to cellulose from rice straw. The steam flash-explosion treatment was performed at a steam 25

pressure of 0.9,1.2,1.6 and 2.0 MPa for 270s, respectivel, and then the chemical constitute and

fiber conformation before and after steam flash-explosion pretreatment were analyzed. The results

showed that after steam flash-explosion pretreatment the hemicellulose content was significantly

reduced, which led to the increase of cellulose content. In addition, the higher the steam

flash-explosion pressure, the lower the hemicellulose and lignin content, the greater the degree of 30

fiber refinement. Though after pretreatment the degree of crystallinity was increased, the

农作物秸秆等。据统计仅 2009 年全国作物秸秆总量达 69841.92 万 t，目前，除一部分用于

的大量消耗和环境污染问题的日益严重，粗纤维这种廉价的可再生资源的应用也越来越受到40

质素是一种重要的化工原料，所以从秸秆中将这三种物质分离提纯有重要意义。