摘要
采用两次加碱和醚化工艺合成了具有不同黏均分子量和取代度的羧甲基纤维素钠(CMC-Na),研究了CMC-Na与不同质量比甘油/水的混合体系的流变性能,探讨了CMC-Na的分子量、取代度及浓度对烟草薄片制备过程中CMC-Na/甘油/水混合体系流变性能的影响。研究表明,该混合体系属于非牛顿流体,其流变性能符合Ostwald-de Waele模型;甘油的加入对混合体系的流变性能影响较大,当甘油/水中甘油的质量分数为0.8时混合体系非牛顿性最强;混合体系的非牛顿性与CMCNa的分子量、浓度和取代度呈现正相关。
Sodium carboxymethyl cellulose(CMC-Na) with different viscosity-average molecular weight and degree of substitution were synthesized by twice alkalization and etherification process. The rheological properties of CMC-Na in different proportions of glycerol/water mixtures were studied, and the effects of the molecular weight, degree of substitution and concentration of CMC-Na on the rheological properties of mixed system during the preparation of tobacco sheets were studied. The results show that the mixed system is a non-Newtonian fluid with pseudoplasticity, and the rheological properties conform to the Ostwald-de Waele model. Glycerol has a great influence on the rheological properties of the mixed system, and the non-Newtonian properties of mixed system are the strongest when the mass fraction of glycerin is 0.8. The non-Newtonian properties of the hybrid system increases with the increase of the molecular weight, concentration and substitution degree of CMC-Na.
作者
晏群山
危培
彭瑞
田世林
童宇星
倪家志
刘良才
熊斌
YAN Qunshan;WEI Pei;PENG Rui;TIAN Shilin;TONG Yuxing;NI Jiazhi;LIU Liangcai;XIONG Bin(China Tobacco Hubei Industry Co.,Ltd.,Wuhan 430040,Hubei,China;Hubei Xinye Reconstituted Tobacco Development Co.,Ltd.,Wuhan 430056,Hubei,China;Hubei Key Lab of Applied Research Institute of Reconstituted Tobacco,Wuhan 430040,Hubei,China;School of Chemistry,Chemical Engineering and Life Science,Wuhan University of Technology,Wuhan 430070,Hubei,China)
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2023年第3期331-339,共9页
Journal of Wuhan University:Natural Science Edition
基金
中国烟草总公司科技重大专项(110202001014(XX-10))
湖北省自然科学基金(2021CFB302)。
关键词
羧甲基纤维素钠
混合体系
流变性能
烟草薄片
sodium carboxymethyl cellulose(CMC-Na)
mixed system
rheological properties
tobacco sheet
