麦草酸水解提取木糖的探究  

Study on Xylose Dissolution from Wheat Straw in Sulfuric Acid Hydrolysis

作　　者：马浩[1] 吉兴香[1,2,3] 田中建[1,4] 房桂干[2] 陈嘉川[1] 杨桂花[1] 

机构地区：[1]齐鲁工业大学制浆造纸科学与技术教育部重点实验室,山东济南250353 [2]中国林业科学研究院林产化学工业研究所,江苏南京210042 [3]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [4]广西大学,广西南宁530004

出　　处：《中国造纸》2017年第4期36-41,共6页China Pulp & Paper

基　　金：国家自然科学基金(31400511;31670590和31670595);山东省科技发展计划(2014GNC113002)

摘　　要：探究了不同条件下麦草硫酸水解木糖溶出的变化。结果表明,在水解温度120℃,水解时间60 min,硫酸的质量分数4%时,木糖提取量达到最大值0.20 g/g麦草,木糖的溶出过程随着水解反应强度的增强可分为三个阶段。X射线衍射、傅里叶红外光谱和环境扫描电镜分析表明,硫酸质量分数和水解温度是影响水解过程中麦草纤维素结晶区破坏的主要因素,在木糖提取量最大时,半纤维素几乎完全降解溶出。The xylose dissolution of wheat straw in sulfuric acid hydrolysis were explored under different conditions, which demonstrated that when hy^trolysis was carried out at 120℃ for 60 min, with sulfuric acid concentration of 4%, the xylose extraction efficiency of wheat straw reached the maximum amount of 0.20 g/g. Moreover, xylose dissolution process could be divided into three stages along with the increase of hydrolysis reaction strength. X-Ray Diffraction （XRD）, Fourier Transform Infrared Spectroscopy （FT-IR） and Environmental Scanning Electron Microscopy （ESEM） analyses confirmed that sulfuric acid concentration and temperature were the main factors to damage wheat straw fiber crystallization area. When the xylose extraction efficiency was maximized, hemicellulose was almost completely degraded and dissolved.

关 键 词：麦草 酸水解 木糖 

分 类 号：TQ353.6[化学工程]