Influence of some polysaccharides on the production of calcium carbonate filler particles

Kontrec, Jasminka; Kralj, Damir; Brečević, Ljerka; Falini, Giuseppe

doi:10.1016/j.jcrysgro.2008.07.106

Cited by 65 publications

(36 citation statements)

References 40 publications

(49 reference statements)

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“…Spherical hollow, cubic and linear CaCO 3 particles are used as fillers in paper-, plastic-and rubber-making [11]. Therefore, controllable synthesis and properties investigations of CaCO 3 in the presence of additives such as polysaccharides [12][13][14][15][16][17], polypeptide [18,19], proteins [20][21][22][23] and surfactants [24][25][26] have attracted much interest. In our previous study, the influence of O-(hydroxy isopropyl) chitosan (HPCHS) on CaCO 3 crystallization was investigated.…”

Section: Introductionmentioning

confidence: 99%

The influence of xanthan on the crystallization of calcium carbonate

Yang

2011

Journal of Crystal Growth

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Section: Introductionmentioning

confidence: 99%

The influence of xanthan on the crystallization of calcium carbonate

Yang

2011

Journal of Crystal Growth

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“…The study reported in this paper is a continuation of our work on the influence of soluble starch and non-ionic, cationic and anionic dextrans on the precipitation of calcium carbonate in the model system in which solutions of calcium hydroxide and carbonic acid were reactants. 30 It was found that these additives modified the morphology and the size of the precipitated particles, as well as the composition of the precipitate. The results showed that the adsorption of anionic dextran inhibited crystal growth of PCC.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Calcium Carbonate by Semicontinuous Carbonation Method in the Presence of Dextrans

Kontrec¹,

Ukrainczyk²,

Babić-Ivančić³

et al. 2011

Croat. Chem. Acta

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Abstract. Precipitated calcium carbonate (PCC) was prepared by means of semicontinuous carbonation of Ca(OH) 2 suspension, at 35 and 45 °C and in the presence of non-ionic dextran and dextran sulfate. The carbonation process was regulated at different predetermined values of electrical conductivity, that corresponded to different concentrations of dissolved Ca(OH) 2 : 0.5 mS cm. The results of physicalchemical characterization of the product showed that calcite was the only polymorphic modification obtained in the whole range of experimental conditions investigated. In addition, it was found that morphology, crystal size distribution and specific surface area of PCC strongly depended on the electrical conductivity / concentration of dissolved Ca(OH) 2 , at which the process was performed: predominantly scalenohedral crystals of higher surface area (about 5 m 2 g −1) were produced at higher electrical conductivity, while at lower electrical conductivity predominantly rhomohedral calcite crystals of relatively low specific surface area were obtained. In the system of the highest electrical conductivity, κ 25 = 5.0 mS cm, and at 35 °C, the addition of non-ionic dextran significantly influenced the process by preventing the regulation. The crystals that appeared were in the form of irregular aggregates of high specific surface area, S ≈ 29 m 2 g −1. FT-IR and TG analyses indicated that the non-ionic dextran was adsorbed onto the calcite surface, most probably by relatively strong and specific interactions between oxygen from the hydroxyl groups of dextran molecules and calcium ions from the crystal surface. On the contrary, the anionic dextran (dextran sulfate) exerted minor effects in the course of semicontinuous carbonation process and in the properties of the final product, PCC. However, the analysis of the precipitate indicated that dextran sulfate was adsorbed at the surfaces, most probably by the weak and non-specific electrostatic interactions. (doi: 10.5562/cca1746)

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“…The reduced SSA indicates the disappearance of the scalenohedral morphology. The observed change in morphology can be ascribed to the adsorption of starch onto the crystal surfaces of calcite when using high enough starch concentrations (Kontrec et al 2008). Yang et al (2003) proposed an underlying mechanism.…”

Section: Properties Of the Composite Pigments Effect Of Polysaccharidmentioning

confidence: 99%

The Effect of Carbonation Conditions on the Properties of Carbohydrate-Calcium Carbonate Hybrid Pigments

Kuusisto

Maloney

2015

BioResources

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The influence of two polysaccharides, native corn starch and carboxymethyl cellulose (CMC), on the precipitation of calcium carbonate was examined by utilizing two different carbonation processes. In a batch process, carbon dioxide gas was fed through calcium hydroxide slurry at pH 11.5 to 12.0. The reaction was complete when the pH had been decreased to 7. In a fed-batch reaction, the carbon dioxide was dissolved in water while calcium hydroxide was pumped into the water, maintaining a constant pH of 6.0±0.5. Scanning electron microscopy, particle size analysis, and specific surface area analysis were used to characterize the structure of the precipitated calcium carbonate (PCC) pigments. In application testing, the impact of modified pigments on paper properties was examined. The results showed that carbohydrates can significantly affect the crystallization of calcium carbonate, but the influence depends on the precipitation conditions and the type and concentration of the carbohydrate added. The starch-modified PCC, produced by the fed-batch reaction, improved the mechanical properties of the paper, whereas CMCmodified PCC yielded paper with good surface and optical performance but weakened strength properties.

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Influence of some polysaccharides on the production of calcium carbonate filler particles

Cited by 65 publications

References 40 publications

The influence of xanthan on the crystallization of calcium carbonate

The influence of xanthan on the crystallization of calcium carbonate

Synthesis of Calcium Carbonate by Semicontinuous Carbonation Method in the Presence of Dextrans

The Effect of Carbonation Conditions on the Properties of Carbohydrate-Calcium Carbonate Hybrid Pigments

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