TEMPO氧化-高频超声对豆渣纳米纤维结构与溶胀性能的影响研究  

Effect of TEMPO Oxidation-High Frequency Ultrasound on the Structure and Swelling Properties of Okara Cellulose Nanofibers

作　　者：桂艺珈 马博慧 裘雨欣 侯洁 王帅铮 左一珺 兰琴琴 王鹏[1] 刘兴泉[1] 吴长玲 Gui Yijia;Ma Bohui;Qiu Yuxin;Hou Jie;Wang Shuaizheng;Zuo Yijun;Lan Qinqin;Wang Peng;Liu Xingquan;Wu Changling(School of Food and Health,Zhejiang Agriculture and Forestry University,Hangzhou311300)

机构地区：[1]浙江农林大学食品与健康学院,杭州311300

出　　处：《中国粮油学报》2025年第3期71-78,共8页Journal of the Chinese Cereals and Oils Association

基　　金：国家“十四五”重点研发计划项目(2024YFF1105500);浙江省自然科学基金资助项目(LQ24C200006);浙江农林大学科研发展基金项目(2023LFR019)。

摘　　要：为有效提升豆渣纤维素的持水、溶胀性能,本研究运用TEMPO/NaBr/NaClO化学氧化与高频超声处理技术联合改性豆渣纤维素,并根据动态光散射、傅里叶红外光谱、X-衍射、流变分析、扫描电镜、透射电镜等手段系统阐明不同改性条件下豆渣纳米纤维的构效变化规律以解决纤维“团聚”难题。结果表明,经TEMPO氧化-超声处理(800 W,15 min)后豆渣纳米纤维平均粒径较小(176 nm),多分散指数较低(PDI=0.34),负电荷较强(ζ=-43 mV),溶胀率较高(7.8),膨胀力较高(25.8 g/g),结晶度较高(85%)。因此,适当的超声处理可有优化纳米纤维素的溶胀功能,为改善豆渣纤维的开发利用提供理论基础。This study aims to enhance the water-holding and swelling properties of soybean residue cellulose by combining TEMPO/NaBr/NaClO chemical oxidation with high-frequency ultrasonic treatment.Various characterization techniques,including dynamic light scattering,Fourier-transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),rheological analysis,scanning electron microscopy(SEM),and transmission electron microscopy(TEM),were employed to systematically investigate the structural and functional changes of soybean residue nanofibers under different modified conditions.The results showed that after TEMPO oxidation and ultrasonic treatment(800 W,15 min),the mean particle size of the soybean residue nanofibers decreased to 176 nm,with a lower polydispersion index(PDI=0.34),a stronger negative charge(ζ=-43 mV),and improved swelling properties(swelling rate=7.8,expansion force=25.8 g/g).Additionally,the modified cellulose exhibited high crystallinity(85%).These findings suggest that appropriate sonication can optimize the swelling properties of soybean residue nanocellulose,providing a theoretical foundation for the improved development and utilization of okara.

关 键 词：豆渣纳米纤维 TEMPO-氧化 高频超声 结构特征 

分 类 号：TS201.2[轻工技术与工程—食品科学]