Mg-Al类水滑石/高岭土分散体系流变振荡现象研究  

Study on the Rheological Fluctuation Behavior of Mg-Al-Hydrotalcite-like Compound/Kaolinite Suspensions

作　　者：戴肖南[1] 侯万国[2] 赵超[1] 

机构地区：[1]山东轻工业学院化学工程学院,济南250100 [2]山东大学胶体与界面化学教育部重点实验室,济南250100

出　　处：《化学学报》2011年第2期153-156,共4页Acta Chimica Sinica

基　　金：山东省中青年科学家科研奖励基金(No.2007BS04026)资助项目

摘　　要：恒剪切速率(DL)实验发现Mg-Al类水滑石(HTlc)/高岭土(kaolinite)分散体系中存在流变震荡现象,即粘度随时间发生周期性升高和降低的变化.研究了HTlc/kaolinite分散体系的质量比(R)、剪切速率、pH、无机盐及聚合物等因素对振荡现象的影响,发现较高的DL与无机盐含量均可使震荡现象消失.pH值及聚合物不影响振荡周期,但会改变振荡振幅.对实验结果的机理进行了探讨.The rheological fluctuation behavior of apparent viscosity η with t was found in Mg-Al-Hydrotalcite-like compound/kaolinite（Mg-Al-HTlc/kaolinite for short） suspensions by steady shear experiment,and the influence of mass ratio of HTlc to kaolinite（R）,steady shear rate（DL）,pH,electrolytes and polymers was investigated.It was found that the fluctuation behavior would disappear when DL and the concentration of electrolytes were relatively high.The pH value and polymers would change the amplitude of the fluctuation behavior.The results were discussed on the basis of the interactions between the HTlc and kaolinite particles.

关 键 词：流变振荡现象 类水滑石化合物 高岭土 分散体系 粘度 

分 类 号：O611.3[理学—无机化学]