摘要
研究了阳离子纤维素醚（JR-30M）水溶液的流变性质，讨论了浓度、温度、PH值、外加盐对其溶液零切黏度的影响．结果表明：JR-30M水溶液在质量浓度为0．5～20g／L范围内表现为假塑性流体，超过7g／L后，牛顿指数n从原先的单调下降开始回升进而发生波动；JR-30M零切黏度随温度升高而降低，当缓冲溶液的pH值从3升至6，JR-30M溶液的黏流活化能从75．08kJ／mol降到36．83kJ／mol，而溶液的黏度随体系酸性的减弱而升高．由此推断在一定酸性条件下，JR-30M能形成有序相；JR-30M溶液的黏度随所加盐的类型及浓度不同而呈复杂变化．
The rheological properties of cationic cellulose ether （JR-30M） in aqueous solution were studied and the effects of concentration （ρJR）, temperature, pH value and additive salt were discussed. In a certain rangé of concentration, JR-30M solution exhibited pseudoplastic behavior. However, viscosity behavior index （n） did not always decrease with ρJR increasing. It rose and even fluctuated after ρJR larger than 7 g/L. Its zero shear- rate viscosity dropped with temperature. In buffer solutions of pH=3- 6 with the concentration of 5 g/L, the activation energy of viscous fluid flow （Ea） were from 75.08 kJ/mol to 36.83 kJ/mol, but the viscosity of these JR-30M solutions increased when pH values increased from 3 to 6, suggesting that JR-30M could form ordered structure or some ordered micro-region in the solutions. The addition of different concentration and type of salt resulted in the complicated changes of JR-30M solution.
出处
《江南大学学报（自然科学版）》
CAS
2007年第5期610-613,共4页
Joural of Jiangnan University (Natural Science Edition)
基金
国家自然科学基金项目(20671043)
关键词
阳离子纤维素醚
零切黏度
黏流活化能
外界影响因素
cationic cellulose ether
viscosity
activation energy of viscous fluid flow
environmental factor
