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Citation: LIAN Yinghui, LI Lifang, ZHAO Fan, ZHAO Wenjie. Rheologic Property and Influencing Factors of Sodium Carboxymethyl Cellulose/Montmorillonite Suspension[J]. Chinese Journal of Applied Chemistry, ;2013, 30(10): 1208-1214. doi: 10.3724/SP.J.1095.2013.20553 shu

Rheologic Property and Influencing Factors of Sodium Carboxymethyl Cellulose/Montmorillonite Suspension

a. College of Plant Protection, Shandong Agricultural University, Shandong Agricultural University, Taian 271018, China;
b. College of Chemistry and Material Science, Shandong Agricultural University, Shandong Agricultural University, Taian 271018, China

Received Date: 28 November 2012
Revised Date: 31 December 2012

In order to unveil the rheological properties of suspensions of montmorillonite (MT) and its mixture with sodium carboxymethyl cellulose (CMC)/MT,the effects of the mass fraction w of MT,mass ratio R of CMC to MT,electrolyte,pH and experimental temperature on such properties have been systematically studied. When w(MT) was increased from 1.0% to 3.0%,pure MT suspension changed from Newtonianlike fluid to plastic one,and the thixotropic type changed from non-thixotropy to positive thixotropy and then a complex one. For CMC/MT plastic suspension,the increase of R(fixing w(MT)=2.0% in all the systems)would cause the yield value(τ₀) and consistency coefficient (K) to increase as well. The hysteresis loop area(S) increased initially and then decreased,which was accompanied with a synchronous variation of the absolute zeta potential value(|ζ|). The plastic and thixotropic characters of CMC/MT suspension could not be altered by either the electrolytes or experimental temperature investigated. But the yield value τ₀ and consistency coefficient K would increase with the increase of electrolyte (NaCl,MgCl₂ and AlCl₃) concentrations or the decrease of experimental temperature. With the increase of pH value of CMC/MT suspension,its thixotropic type was transformed from negative into positive and the|ζ|incresesd,meanwhile the S firstly increased and then decreased and its maximum value was reached at pH=8.46.
- montmorillonite,
- sodium carboxymethyl cellulose,
- rheology,
- thixotropy,
- hysteresis loop
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