Rheological properties of palygorskite–bentonite and sepiolite–bentonite mixed clay suspensions

Influence of hydrated lime on the surface properties and interaction of kaolinite particles

“…1). The larger the number of layer stacking and thicker the particle, the lower the number of particle interactions and the weaker the linkages between those interactions and vice versa as it has been observed for the case of smectite (Abend and Lagaly, 2000;Christidis et al, 2006;Laird, 2006;Chemeda et al, 2014). In other words, the physico-chemical inter-particle forces are relatively smaller in low defect Kaol because of low specific surface area.…”

“…Consequently, many workers have used rheological techniques to indirectly assess the physicochemical force between colloidal particles and the associated aggregation structure (Johnson et al, 1998;Abend and Lagaly, 2000;Hyun et al, 2002;Mpofu et al, 2003;Szekeres, 2004, 2006;Bossard et al, 2007;Shankar et al, 2010;Chemeda et al, 2014). Although the effect of ionic strength and pH on the rheological properties of clay mineral dispersion has been thoroughly studied (Abend and Lagaly, 2000;Duran et al, 2000;Ramos-Tejada et al, 2001;James, 2006, 2008;Szekeres, 2004, 2006), a detail description of particle interaction in calcium rich alkaline condition such as in lime solution is rarely presented in the literature.…”

Recent progress in dispersion of palygorskite crystal bundles for nanocomposites

“…So, Pal shows excellent colloidal, adsorption, reinforcing properties, and thermal/ mechanical stability (Jones and Galan, 1988), and has been applied as ideal candidates in many fields of nanotechnology such as colloidal or stabilizing agents (Abdo and Haneef, 2013;Abdo, 2014;Chemeda et al, 2014;J. Lu et al, 2014), adsorbents (Al-Futaisi et al, 2007; A.M.B.M.…”

Smectite clay – inorganic nanoparticle mixed suspensions: phase behaviour and rheology

“…16. The effect on rheology has been strongly correlated with layer charge, 155 where higher layer charge favours assembly of the clay sheets into multilamellar aggregates, reducing the effective surface available for bridging interactions between clay particles. Burba et al [158][159][160] considered for drilling uid applications the addition of hydrotalcite to montmorillonite clay at a mass ratio of 1 : 10, where an enhancement in the rheology was observed.…”

“…Mixed clay suspensions such as montmorillonite-palygorskite and montmorillonite-sepiolite have attracted interest [153][154][155] as these minerals are oen co-deposited. Here, where the particles are of comparable size, shape plays a key role in the effect on rheology, with addition of the second component initially at low concentrations tting into the random repulsive gel network, as exemplied by a small increase in rheology for low concentrations, then at larger concentrations disrupting the packing leading to a deterioration in rheological parameters.…”