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 ℃.
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)
关键词
麦草
热水抽提
红外光谱
热重分析
wheat straw
hot-water extraction
FT-IR
TGA e TGA show that the main and the maximum weight
