麦草热水抽提工艺研究  

Study on hot-water extraction of wheat straw

作　　者：张素风[1] 杨恒[1] 

机构地区：[1]陕西科技大学轻工与能源学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2012年第4期1-3,7,共4页Journal of Shaanxi University of Science & Technology

基　　金：陕西科技大学博士科研启动基金项目(BJ10-14)

摘　　要：对麦草制浆前的热水抽提工艺进行了研究.实验结果表明:随着抽提温度升高,抽提时间延长,麦草得率下降,抽提液pH值降低,固形物含量和酸溶木素含量有所升高.采用傅立叶红外光谱(FT-IR)和热重分析(TGA),对抽提液性能进行了表征.红外光谱分析表明1 041cm-1处存在半纤维素的特征吸收峰;热重分析表明抽提液主要失重温度在150～450℃之间,其中259.5℃时失重速率最大,为0.295%/℃.The process of hot water extraction before pulping was investigated in this paper. The results indicated that as the extraction temperature and time increase, the yield of wheat straw decreases, the pH value of the extracted solution decreased, with the increase of solids content and acid soluble lignin content. After extraction, the physical and chemical proper- ties of hot water extract were characterized by the Fourier Transform Infrared Spectrometer （FT-IR） and Thermo Gravimetric Analysis （TGA）. The FT-IR shows that there is the characteristic absorption peak of hemicellulose in 1 041 cm^-1 Th weight loss temperature of the extracts is between 150-450 ℃, loss rate is 0. 295%/℃ appeared at 259.5 ℃.

关 键 词：麦草 热水抽提 红外光谱 热重分析 

分 类 号：TS743.11[轻工技术与工程—制浆造纸工程]