Influence of ionic strength on the viscosities and water loss of bentonite suspensions containing polymers

Abstract

A study was made of the influence of ionic strength (S) on the apparent (AV) and plastic (PV) viscosities and water loss (WL) of sodium bentonite suspension with polymers. Na-bentonite was dispersed in water (4.86% w/w) of different ionic strengths (S = 0.0, 0.015, 0.030 and 0.045 M) followed by the addition of polymer. Three polymer samples were studied, i.e., low viscosity carboxymethyl cellulose (CMC BV), polyanionic cellulose (PAC), and partially hydrolyzed polyacrylamide (HPAM). The results indicated that the presence of salts and increased salinity greatly influence the apparent and plastic viscosities and water loss of bentonite suspensions with polymer

Carboxymethyl Starch/Montmorillonite Aqueous Dispersions: The Effect of Components and Mixing Method on Rheoviscometric Characteristics

“…940,000 g/mol, polysaccharide chains could cause coating of clay particles resulting in a limited dispergation of MMT platelets, similar to the polyanionic cellulose/MMT systems. 14 Also the kind of MMT used had a significant effect on rheoviscometric characteristics of CMS/MMT systems. Applying sodium MMT resulted in an almost double viscosity increase at 1 rpm from 14,000 up to ca.…”

“…However, limited sources on other carboxymethylated polysaccharide/MMT systems including relevant derivatives of cellulose or chitosan are accessible. [13][14][15][16][17] Benchabane and Bekkour 13 investigated rheological behavior of aqueous calcium MMT/carboxymethyl cellulose (CMC) suspensions. They found that CMC (DS 0.65-0.85) coated the clay particles and prevented the reorganization of the agglomerates without enlargement of the MMT interlayer spacing caused by CMC.…”

Influence of MgO and CaCl2 on the rheological properties of bentonitic clays from the new Paraíba-Brazil deposits using experimental planning and statistical analysis

“…These systems have been shown to have satisfactory rheological property values at intermediate points, where traditional techniques do not indicate adequate results. Some researchers [12][13][14] have used statistical and mathematical techniques to study the effect of clay compositions and additives on the rheological properties of clay-water systems. This methodology has found application in a number of technological areas [13][14][15][16][17].…”

“…The relationships between the calculated and tabulated F-test values for AV 1 , PV 1 , and AV 2 showed that the models were not only significant but also predictive. For PV 2 , it can be stated that the model was significant [14,21].…”

Effect of Guar Gum Polymer and Lime Powder Addition on the Fluid Loss and Rheological Properties of the Bentonite Dispersions

“…Many investigators have studied the fluid loss of bentonite dispersions considering different additives. [39][40][41][42] The fluid loss of different prepared mixtures has been shown in Figure 5. Accordingly, for bentonite dispersions without any additive, as bentonite concentration increased, the fluid loss decreased which may be related to presence of higher number of dispersed particle and higher viscosity value, which is a suitable characteristic of drilling fluid.…”