Effect of Polyelectrolytes on the Precipitation of Calcium Carbonate

Williams, Forrest V.; Ruehrwein, R. A.

doi:10.1021/ja01575a018

Cited by 49 publications

(19 citation statements)

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“…For example, polyvinyl pyrrolydone seemed to have little effect on the size of silver bromide sols (18). However, the average size of calcium sulfate precipitates in the presence of polyelectrolytes was smaller than in pure electrolyte solutions (19,20). Furthermore, the macromolecules may cause a lowering in the surface charge density by permitting fewer potential determining ions for adsorb.…”

Section: Discussionmentioning

confidence: 99%

Interaction of nonionic dextrans with silver bromide hydrosols

Lindsay¹,

Matijević

Kratohvil

1975

Colloid Polymer Sci

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Section: Discussionmentioning

confidence: 99%

Interaction of nonionic dextrans with silver bromide hydrosols

Lindsay¹,

Matijević

Kratohvil

1975

Colloid Polymer Sci

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“…[40] These results suggest that less stable polymorphs, such as aragonite and vaterite tend to form in the presence of functionalized macromolecules. The effects of the carboxyl groups on the crystallization have also been studied by the use of sodium poly(methacrylate), [41] a functionalized dendrimer, [42] and block copolymers consisting of poly(ethylene glycol) and poly(methacrylic acid) segments (Fig. 3).…”

Section: Synthetic Macromoleculesmentioning

confidence: 99%

Calcium Carbonate–Organic Hybrid Materials

Kato¹,

2002

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This article focuses on the synthetic approach to the preparation of calcium carbonate–organic hybrid materials, which are obtained by self‐organization processes under mild conditions. In these processes, organic molecules such as functionalized polymers and aligned amphiphilic molecules on the surface play key roles in the crystallization of calcium carbonate, which results in the formation of hybrid materials. As well as being environmentally benign, the hybrid materials have controlled morphology and unique properties. Materials scientists have obtained the ideas for the design of such hybrid materials from biominerals such as shells, teeth, and bones.

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“…In addition, it has also been shown that one of the factors determining the effectiveness of a polyelectrolyte is its molecular weight. Williams and Ruehrwein (21) suggested that molecular weight influences the kinetics of adsorption of the polyelectrolyte onto the growing crystals. It was postulated that there should be an optimum molecular weight for a given polyelectrolyte at which maximum effect would be obtained.…”

Section: Ti Me (Mrn)mentioning

confidence: 99%

Kinetics of crystal growth of calcium sulfate dihydrate. The influence of polymer composition, molecular weight, and solution pH

Amjad¹

1988

Can. J. Chem.

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A seeded crystal growth technique has been used to study the influence of solution pH and temperature ranging from 25 to 50°C on the performance of polymers of varying functional groups as calcium sulfate dihydrate (CaS04.2H20, gypsum) crystal growth inhibitors. Results indicate that at constant temperature and at a constant solution pH, crystallization in the presence of polyacrylic acids is preceded by an initial slow growth reaction, hcreaftcr called induction period, following which crystal growth of gypsum proceeds with a rate close to that in pure supersaturated solution. Results suggest that at a constant pH, polyacrylic acid concentration, molecular weight, and temperature greatly affect the duration of induction period. Kinetic data collected as a function of solution pH in the range 2.5 to 9.0 suggest that solution pH has a marked effect on the induction period. The observed dependence of induction period on solution pH may be explained in terms of the degree of ionization of polyacrylic acid. Among the polymers of varying functional groups studied, i.e. carboxyl, sulfonate, acrylamide, dimethyldiallylammonium, etc., only those polymers having carboxyl group showed marked inhibitory activity for the growth of gypsum crystals.ZAHID AMJAD. Can. J . Chem. 66, 1529 (1988) On a fait appel i une technique de croissance de cristaux ensemencCs pour Ctudier I'influence du pH de la solution ainsi que de la tempkrature (allant de 25 i 50°C) sur la performance de polymkres portant divers groupements fonctionnels comme inhibiteurs de la croissance de cristaux du sulfate de calcium dihydratC (&SO4. 2H20, gypse). Les rCsultats indiquent que, i tempCrature constante et i un pH de solution constant, la cristallisation en prCsence d'acides polyacryliques est prCcCdCe par une rCaction initiale de croissance qui est lente, appelCe par la suite pCriode d'induction, et qui est suivie par une croissanee du cristal de gypse se produisant i une vitesse qui est proche de celle qui est observie avec une solution sursaturke pure. Les rCsultats suggerent que, i des pH constants, la concentration en acide polyacrylique, le poids molCculaire et la tempirature influencent beaucoup la pCriode d'induction. Les donnCes cinCtiques recueillies en fonction du pH allant de 2,5 2 9,O suggtrent que le pH de la solution a une influence marquCe sur la pCriode d'induction. On peut expliquer cette observation en fonction du degri d'ionisation de I'acide polyacrylique. Parmi les polymeres portant divers groupements fonctionnels, eomme carboxyle, sulfonate, acrylamide, dirnithyldiallylammonium, etc, seuls les polymeres portant des groupements carbonyles prisentent une activitC inhibitrice marquee sur la croissance des cristaux de gypse.[Traduit par la revue]

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Effect of Polyelectrolytes on the Precipitation of Calcium Carbonate

Cited by 49 publications

References 0 publications

Interaction of nonionic dextrans with silver bromide hydrosols

Interaction of nonionic dextrans with silver bromide hydrosols

Calcium Carbonate–Organic Hybrid Materials

Kinetics of crystal growth of calcium sulfate dihydrate. The influence of polymer composition, molecular weight, and solution pH

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