小麦麸皮制备纳米纤维素晶体及其性能分析  

Preparation of Nanocellulose Crystals from Wheat Bran and Analysis of Their Properties

作　　者：张馨予 王婷[1] 王叶凡 郭智华 刘海棠[1,2] ZHANG Xinyu;WANG Ting;WANG Yefan;GUO Zhihua;LIU Haitang(Key Laboratory of Paper and Biomass Refining of China Light Industry,Tianjin Key Laboratory of Pulp and Paper,College of Light Industry Science and Engineering,Tianjin University of Science and Technology,Tianjin 300457,China;Jiangsu Key Laboratory of Biomass Energy and Materials,Nanjing 210042,China)

机构地区：[1]中国轻工业造纸与生物质精炼重点实验室,天津市制浆造纸重点实验室,天津科技大学轻工科学与工程学院,天津300457 [2]江苏省生物质能源与材料重点实验室,南京210042

出　　处：《天津科技大学学报》2025年第1期42-48,56,共8页Journal of Tianjin University of Science & Technology

摘　　要：小麦麸皮是小麦加工过程的副产物,可作为纤维素的来源。通过硫酸水解从麸皮中制备纳米纤维素晶体(CNC),并探究了水解温度对CNC的形貌、表面电荷、粒径、得率、官能团和热稳定性的影响。结果表明,在纯化过程中非纤维素成分被大量去除。场发射扫描电子显微镜证实所获得的CNC呈现出各种尺寸的棒状和针状形态。CNC悬浮液的Zeta电位值范围为-38.8~-34.2 mV。水解温度为50℃时,CNC的结晶度达到最高值(72.88%)。随着水解温度的增加,CNC的粒径减小,得率和热稳定性降低。此外,制备的CNC悬浮液对大肠杆菌和金黄色葡萄球菌具有一定的抑菌作用。这些结果表明,CNC在纳米复合材料领域具有巨大的潜力。Wheat bran is a by-product of wheat processing and can be a source of fiber.In our current study,nanocellulose crystals(CNC)were prepared from bran by sulfuric acid hydrolysis,and the effects of hydrolysis temperature on the morph-ology,surface charge,particle size,yield,functional groups and thermal stability of CNC were investigated.The results showed that the non-cellulosic components were substantially removed during the purification process.Field emission scanning electron microscopy confirmed that the obtained CNC showed rod-like and needle-like morphologies of various sizes.The zeta potential values of the CNC suspensions ranged from-38.8 to-34.2 mV.The crystallinity of CNC reached its highest value(72.88%)at the hydrolysis temperature of 50℃.With the increase of hydrolysis temperature,the particle size of CNC decreased,and the yield and thermal stability reduced.Moreover,the prepared CNC suspensions showed some bacteriostatic effects against Escherichia coli and Staphylococcus aureus.These results indicate that CNC has great potential in the field of nanocomposites.

关 键 词：小麦麸皮 纤维素 硫酸水解 纳米纤维素 

分 类 号：TQ353.6[化学工程] TS210.9[轻工技术与工程—粮食、油脂及植物蛋白工程]