羧甲基纤维素锂溶液的流变性质  

Rheological Properties of Lithium Carboxymethylcellulose Aqueous Solution

作　　者：周帅[1] 叶君[1,2] 蔡振和[1] 马超[1] 陈卉平[1] 孔洁静[1] 

机构地区：[1]华南理工大学轻工与食品学院,广东广州510640 [2]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《造纸科学与技术》2011年第3期56-59,共4页Paper Science & Technology

基　　金：国家973计划项目(2010CB732201);广东省高等学校大学生创新实验项目(S1010561069)

摘　　要：本文研究了羧甲基纤维素锂的流变性质,并且考察了不同制备条件对羧甲基纤维素锂流变性质的影响。结果表明CMC-Li保持了与CMC-Na水溶液一致的流变特性,且CMC-Li比CMC-Na具有更强的非牛顿型流体特性,在剪切力的作用下比CMC-Na分子链更容易定向、伸展和解缠绕;酸化时间为7min时制备的羧甲基纤维素锂的零剪切黏度最大;不同的反应温度下制备的CMC-Li水溶液的黏度变化趋势相同,温度对样品黏度的影响很小,反应温度为23℃时溶液的零剪切黏度最大。In this paper,rheological property of lithium carboxymethylcellulose（CMC-Li） was studied,and the influences of different preparation condition on the rheological properties are also investigated.The results showed that CMC-Li has the similar rheological behavior to sodium carboxymethylcellulose（CMC-Na）,that is,CMC-Li also has non-Newtonian fluid property;CMC-Li molecule chains was easier to direct,stretch and dewind under sharing force function;the zero-rate viscosity of CMC-Li at 7min acidification time is the highest;the variation trends of CMC-Li aqueous solutions under different prepared reaction temperature are the same,i.e.temperatures has small effect on degradation of products,the zero-rate viscosity of aqueous solution at reaction temperature 23℃ is the highest.

关 键 词：羧甲基纤维素锂 流变性质 零剪切黏度 

分 类 号：TQ352.79[化学工程]