摘要
研究了玉米秸秆中半纤维素的微波-碱预提取工艺。实验结果表明：与碱预提取相比,微波-碱预提取不仅能提高半纤维素得率（增幅为10%-30%）,还能提高半纤维素的提取速率,处理时间从2 h甚至是20 h加快到20 min。还研究了液固比（每克秸秆对应加水的毫升数）、碱用量（每克秸秆对应加入氢氧化钠的克数）、处理时间、微波功率以及温度等因素对半纤维素得率的影响,得到了最优提取条件为：液固比20、碱用量1.5、处理时间20 min、微波功率1167 W,秸秆粒径40目。此外,采用红外光谱对所提取的半纤维素进行分析,探讨了微波-碱预提取工艺机理。
Pre-extraction of hemicellulose from corn stover under microwave irradiation was studied in this paper. The experimental results indicated that the extraction yield of hemicellulose was increased by 10% to 30% under microwave irradiation in 20 min, comparing to that without microwave irradiation in 2 h even 20 h. The effect of liquid-to-solid ratio （V （water） ＂ m （stover））, alkali consumption （m（NaOH）＂ m （stover））, time, microwave power, and temperature on the extraction yield of hemicellulose was also investigated. The optimal processing parameters were： liquid-to-solid ratio of 20, alkali consumption of 1.5, time of 20 min, microwave power of 1 167 W, and the particle size of 40 mesh per square inch. The obtained hemicellulose was qualitatively analyzed by IR spectroscopy, and the mechanism of microwave-alkali process was also discussed.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第4期469-474,共6页
Journal of East China University of Science and Technology
基金
长江学者和创新团队发展计划(IRT0721)
高等学校学科创新引智计划(B08021)
华东理工大学化学工程联合国家重点实验室自主开放课题
关键词
玉米秸秆
半纤维素
微波-碱预提取
corn stover
hemicellulose
microwave-alkali pre-extraction
