玉米秸秆制备羧甲基纤维素的研究及结构表征  

Preparation and Structural Characterization of Carboxymethyl Cellulose from Corn Stalk

作　　者：谷芳[1] 马嘉欣 车春波[1] Gu Fang;Ma Jiaxin;Che Chunbo(School of Food Engineering of Harbin University of Commerce,Haerbin 150028)

机构地区：[1]哈尔滨商业大学食品工程学院,哈尔滨150028

出　　处：《中国粮油学报》2022年第9期240-245,共6页Journal of the Chinese Cereals and Oils Association

基　　金：黑龙江省自然科学基金(LH2021E090)。

摘　　要：以玉米秸秆为原料,采用溶媒法制备羧甲基纤维素,在单因素实验的基础上,利用响应面法对羧甲基纤维素的制备工艺进行优化。最佳工艺条件为:氯乙酸质量分数为8.9%、反应时间1.5 h、反应温度63℃,此条件下制备的羧甲基纤维素取代度为1.071。使用扫描电镜、傅里叶变换红外光谱仪、X-射线衍射仪、热重分析仪对玉米秸秆粉、玉米秸秆纤维素及羧甲基纤维素的形貌及结构进行了表征,提取的纤维素的结构没有遭到破坏,结晶度提高。制备的羧甲基纤维素因羧甲基基团的引入,导致表面疏松,热分解温度降低。Carboxymethyl cellulose was prepared from corn straw by solvent method.On the basis of single factor experiment,the preparation process of carboxymethyl cellulose was optimized by response surface methodology.The optimum process conditions were as follows:the mass fraction of chloroacetic acid was 8.9%,the reaction time was 1.5 h,the reaction temperature was 63℃,and the degree of substitution of carboxymethyl cellulose was 1.071.The morphology and structure of corn straw powder,corn straw cellulose and carboxymethyl cellulose were characterized by scanning electron microscope,Fourier transform infrared spectrometer,X-ray diffraction and thermogravimetric analyzer.The structure of the extracted cellulose was not damaged and the crystallinity was improved.Due to the introduction of carboxymethyl groups,the prepared carboxymethyl cellulose had loose surface and reduced thermal decomposition temperature.

关 键 词：玉米秸秆 纤维素 羧甲基纤维素 响应面 表征 

分 类 号：TS210.9[轻工技术与工程—粮食、油脂及植物蛋白工程]