Thermodynamic and microdynamic behavior of water in clay suspensions and gels

Fripiat, J. J.; Cases, J. M.; François, Michèle; Letellier, M.

doi:10.1016/0021-9797(82)90191-6

Cited by 167 publications

(138 citation statements)

References 17 publications

Supporting

Mentioning

120

Contrasting

Unclassified

Order By: Relevance

“…The relation is obscure for the water-smectite and methanol-freetoluene-organophilic products systems, but it is clear for the methanol-added systems. The smectite-water dispersion has been considered to consist of tactoids made up of face to face aggregations of several clay platelets (Fripiat et aL, 1982) or a "house-of-cards" structure in which the individual platelets are associated mainly by edge to face bonding (van Olphen, 1977). Insofar as the results of present work are concerned, nothing can be said about the texture of the gel, except that it appears to have an unstable texture, which can be easily destroyed by weak shear stress and recovered thixotropically by releasing the stress.…”

Section: Effect Of the Site And Amount Of Negative Charge In The Silimentioning

confidence: 99%

Rheological Properties of Organophilic Synthetic Hectorites and Saponites

Iwasaki¹,

Onodera²,

Torii³

1989

Clays and clay miner.

View full text Add to dashboard Cite

Abstract-To determine the dependency of theological properties on mineralogical characteristics, eleven organophilic hectorite and nine organophilic saponite samples were prepared from hydrothermally synthesized smectites and a quaternary ammonium salt containing mainly octadecyl groups as alkyl chains and were examined by X-ray powder diffraction (XRD), particle size, chemical, and rheological procedures. The rheological properties of the organophilic products dispersed in toluene were found to depend chiefly on (1) particle size, (2) the expansion behavior of the stacked clay platelets, in which the amount and location of negative charge of the silicate layer affected the expandability, and (3) the amount of methanol added as a polar activator. By the addition of 2-4% methanol, apparent viscosities of the hectorite clays were drastically increased at low shear rate, although even a 10% addition did not significantly affect the saponite clays. Under the most suitable gellation conditions, the saponite clays showed lower apparent viscosity than the hectorite clays. Inasmuch as the former had its negative charge near the surface of the silicate layer and formed strong bonds to the organic ion, the expansion of the platelets was apparently difficult. An optimum layer charge for increasing the viscosity was found; specifically 0.45-0.50 and 0.50-0.55 equivalents per half unit cell for saponite and hectorite clays, respectively. Because the saponite clays contained a denser population of organic ions than the hectorite clays, the ion density in the interlayer of both clays was considered to be the same, i.e., about 0.4 organic ions per unit ab area. ~ ~0)~i~+)',~,-)-d b~ 0.45~0.50, ,x~ b ~d b'~ 0.50~0.55 eq/half unit eeil"~b

show abstract

Section: Effect Of the Site And Amount Of Negative Charge In The Silimentioning

confidence: 99%

Rheological Properties of Organophilic Synthetic Hectorites and Saponites

Iwasaki¹,

Onodera²,

Torii³

1989

Clays and clay miner.

View full text Add to dashboard Cite

show abstract

“…At lower concentrations the spacing shifted to lower values and eventually disappeared for a clay slurry containing 0.001 solid/liter (Figure 4). Fripiat et al (1982) showed that in a 0.1% (w/w) hectorite suspension, most of the clay particles are aggregated in tactoids, the presence of which seems to be a prerequisite for the formation of turbostratic pillared species. A completely disordered flocculation of individual clay particles probably exists for clay concentrations <0.01%.…”

Section: Basal Spacing As a Function Of The Clay Slurry Concentrationmentioning

confidence: 99%

Pillaring Processes of Smectites with and Without Tetrahedral Substitution

Plee

Gatineau²,

Fripiat³

1987

Clays and clay miner.

138

View full text Add to dashboard Cite

Abstract--Pillaring of montmorillonite and beidellite with aluminum polyhydroxypolymer takes place first by the saturation of the cation-exchange capacity by monomeric and/or dimeric aluminum hydroxide species and then the intercalation of the so-called Al~3-polyhydroxypolymer. The clay slurry must have a solid concentration greater than 0.01% (w/w) to produce a basal spacing of about 18/~. Sizeable clay tactoids must therefore e;~ist in the slurry in order to produce a turbostratic structure ordered along the c axis. The main difference between pillared montmorillonite and pillared beidellite seems to be a more ordered distribution of pillars within the interlamellar space of the clays that are rich in tetrahedral substitutions. Recent 27A1 and 2~ Si high-resolution nuclear magnetic resonance data suggest that this higher degree of ordering results from the reaction of the aluminic pillars and the clay sheet near the sites of the tetrahedral substitutions.

show abstract

“…pour des suspensions diluées dans D 2 O, avec ρ = 1,11 g/cm 3 , z = 1 nm, S surface mouillée et C = masse solide/masse eau.…”

Section: éChange Rapideunclassified

“…D'où une méthode de mesure de surface [3]. L'observation d'un T 1 unique n'est vraie que dans la situation dite d'échange rapide, où les protons ne restent sur une molécule d'eau qu'un temps inférieur à T 1 .…”

Section: éChange Rapideunclassified

RMN du deutérium sur des suspensions. Application à une boue de forage. Etude en température et en fréquence d'une argile à grands feuillets

Letellier

1998

Rev. Inst. Fr. Pét.

View full text Add to dashboard Cite

Thermodynamic and microdynamic behavior of water in clay suspensions and gels

Cited by 167 publications

References 17 publications

Rheological Properties of Organophilic Synthetic Hectorites and Saponites

Rheological Properties of Organophilic Synthetic Hectorites and Saponites

Pillaring Processes of Smectites with and Without Tetrahedral Substitution

RMN du deutérium sur des suspensions. Application à une boue de forage. Etude en température et en fréquence d'une argile à grands feuillets

Contact Info

Product

Resources

About