提取方法对米糠纤维素理化性质的影响  

Effects of Extraction Methods on Physicochemical Properties of Rice Bran Cellulose

作　　者：郭逍 罗诗烨 林炎鑫 林亲录[1] 丁玉琴[1] 李晶 龚艳玲 郑晓春 Guo Xiao;Luo Shiye;Lin Yanxin;Lin Qinlu;Ding Yuqin;Li Jing;Gong Yanling;Zheng Xiaochun(School of Food Science and Engineering,Central South University of Forestry and Technology,Changsha 410000;Midea Electrical Heating Appliances Manufacturing Company Limited,Foshan 538300)

机构地区：[1]中南林业科技大学食品科学与工程学院,长沙410000 [2]美的电热电器制造有限公司,佛山528300

出　　处：《中国粮油学报》2024年第7期43-51,共9页Journal of the Chinese Cereals and Oils Association

基　　金：湖南省科技创新计划项目(2023ZJ1070);中央引导地方科技资金项目(2023ZYC008);湖南省“洞庭香米”优势特色产业集群项目(湘农联〔2022〕79号)。

摘　　要：以脱脂米糠为原料提取米糠不溶性膳食纤维(IDF),采用氢氧化钠-亚氯酸钠法、超声辅助氢氧化钠-亚氯酸钠法、氢氧化钠-过氧化氢法、超声辅助氢氧化钠-过氧化氢法等四种方法提取米糠纤维素,并比较4种提取方法对米糠纤维素结构特性和功能特性的影响。结果表明,超声辅助氢氧化钠-亚氯酸钠法提取纤维素具有最高纯度(88.69%)和结晶度(59.30%),且有较好热稳定性、持水性、持油性和葡萄糖吸附能力。与氢氧化钠-亚氯酸钠法相比,氢氧化钠-过氧化氢法提取的纤维素的平均粒径小,持水性和持油能力弱,而胆酸盐吸附能力和淀粉酶抑制活性更强。FT-IR图谱表明氢氧化钠-过氧化氢法提取的纤维素中含有一定量的木质素和半纤维素。SEM分析表明氢氧化钠-亚氯酸钠法提取的米糠纤维素表面更加光滑,超声辅助处理可以显著提高了纤维素的纯度以及持水性和持油性,但对纤维素的平均粒径、热稳定性无显著影响。The insoluble dietary fiber(IDF)was extracted from rice bran by using degreased rice bran as raw material.Four methods were used to extract rice bran cellulose,including sodium hydroxide-sodium chlorite,ultrasonic-assisted sodium hydroxide-sodium chlorite,sodium hydroxide-hydrogen peroxide,ultrasonic-assisted sodium hydroxide-hydrogen peroxide.The effects of four extraction methods on the structural and functional characteristics of rice bran cellulose were compared.The results indicated that ultrasonic assisted extraction of cellulose with sodium hydroxide and sodium chlorite had the highest purity(88.69%)and crystallinity(59.30%),and had better thermal stability,water retention,oil retention and glucose adsorption capacity.Compared with the sodium hydroxide-sodium chlorite method,the average particle size of cellulose extracted by the sodium hydroxide-hydrogen peroxide method was smaller,the water holding capacity and oil holding capacity were weaker,and the cholate adsorption capacity and amylase inhibiting activity were stronger.FT-IR spectra revealed that the cellulose extracted by sodium hydroxide and hydrogen peroxide method contained a certain amount of lignin and hemicellulose.SEM analysis indicated that the surface of rice bran cellulose extracted by sodium hydroxide-sodium chlorite was smoother.Ultrasonic assisted treatment significantly improved the purity,water and oil retention of cellulose,but did not have significant effects on the average particle size and thermal stability of cellulose.

关 键 词：米糠 纤维素 碱法提取 超声处理 结构性质 吸附能力 

分 类 号：TS209[轻工技术与工程—食品科学]