Influence of Shear Rate on Thixotropic Suspensions

Zn–Al layered double hydroxide prepared at different molar ratios: Preparation, characterization, optical and dielectric properties

“…The co-precipitation method is a common method to prepare the LDHs [1][2][3][4] which can be done by mixing divalent and trivalent metal salts with addition of a base under controlled conditions. The anion exchange capacity can be affected by the ratio of divalent and trivalent metal ions.…”

Synthesis and rheological properties of cation-exchanged Laponite suspensions

“…It is known that rheological properties of a thixotropic mate rial depend not only on its initial strength but also on the shear rate and the shearing time, therefore, the measured values of these properties will depend on how the sample is loaded into a viscome ter and how long it is left at rest before shearing [25,26]. Thus, to obtain similar initial conditions for all measurements we first shook the samples to liquefy the suspension so that it could be loaded into the viscometer sample holder using a pipette.…”

Thixotropic and Viscoelastic Properties of Hydrotalcite Like Compound‐Montmorillonite Suspensions

“…HTlc was synthesized by a co-precipitation method. The pre-designed metal chloride was dissolved into deionized water, and then NH 3 •H 2 O was slowly added to the mixed solution of metal chloride until the pH value was adjusted to about 9.5. The product was small delicate flocs suspended in the aqueous solution of NH 3 •H 2 O, then the product was filtered and washed with deionized water to remove excess NH 3 •H 2 O, at last the filter cake was peptized at about 80 ℃ in the oven for about 24 h to convert it to HTlc sol.…”

“…The pre-designed metal chloride was dissolved into deionized water, and then NH 3 •H 2 O was slowly added to the mixed solution of metal chloride until the pH value was adjusted to about 9.5. The product was small delicate flocs suspended in the aqueous solution of NH 3 •H 2 O, then the product was filtered and washed with deionized water to remove excess NH 3 •H 2 O, at last the filter cake was peptized at about 80 ℃ in the oven for about 24 h to convert it to HTlc sol. The chemical composition was found with a 3080E2 type automatic X-ray fluorescent spectrometer (Japan), and the XRD pattern obtained by a D/max-llrA model instrument shows the HTlc particles have a well crystallized hydrotalcite-type structure.…”

“…[3][4][5] The fields of real and potential industrial application of HTlc range widely from oil fields to agriculture. Among numerous uses of HTlc, the drilling fluids, which are composed of HTlc and sodium montmorillonite (MT), are of major importance.…”