HEC/CMC复配溶液协同效应的流变学研究

Viscosity and Viscoelasticity Study on Association of HEC/CMC Mixed System in Aqueous Medium

为了研究不同类型纤维素醚之间的协同效应,采用黏度和动态力学测试方法,以羟乙基纤维素(HEC)与羧甲基纤维素(CMC)复配体系为研究对象,通过对两种纤维素醚按不同质量比例复配水溶液的表观黏度、流变性及动态力学参数的变化,分析离子/非离子型纤维素醚间相互作用的机理.实验结果表明,HEC/CMC复配体系可以形成协同增黏效应并且降低触变性,提高溶液微观结构稳定性.协同作用在m(HEC)∶m(CMC)接近1∶1时趋于明显;当m(HEC)∶m(CMC)为2∶1时,可部分形成共用电子域效应;当m(HEC)∶m(CMC)为1∶2时,组分间协同作用较弱,溶液结构稳定性相对较差.

Aiming at the synergistic effects between different kinds of cellulose ethers,hydroxyethyl cellulose（HEC） and carboxymethyl cellulose（CMC） mixed systems in aqueous medium were studied.Viscosity and oscillatory measurements were employed to monitor the parameters of apparent viscosity,rheology and viscoelasticity of HEC/CMC mixed systems with various mass mixing ratios,so as to analyze the mechanism of interactions between ionic and non-ionic cellulose ethers.The synergistic viscosity effects were observed in HEC/CMC mixed systems with thixotropy decreased,and the microscopic structures of mixed systems were further stabilized.The synergistic effects were more obviously revealed as m（HEC）∶m（CMC） approaching to 1∶1.When m（HEC）∶m（CMC） became 2∶1,the sharing electron field effect was formed.A relatively fragile network structure is presented as m（HEC）∶m（CMC） is 1∶2,due to the weaker interactions between HEC and CMC molecules.