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Precipitation of different calcite crystal morphologies in the presence of sodium stearate


Ukrainczyk, Marko; Kontrec, Jasminka; Kralj, Damir
Precipitation of different calcite crystal morphologies in the presence of sodium stearate // Journal of Colloid and Interface Science, 329 (2009), 1; 89-96 doi:10.1016/j.jcis.2008.09.045 (međunarodna recenzija, članak, znanstveni)


Naslov
Precipitation of different calcite crystal morphologies in the presence of sodium stearate

Autori
Ukrainczyk, Marko ; Kontrec, Jasminka ; Kralj, Damir

Izvornik
Journal of Colloid and Interface Science (0021-9797) 329 (2009), 1; 89-96

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Precipitated calcium carbonate (PCC); Calcite; Carbonation; Adsorption; Stearate; Hydrophobicity

Sažetak
The influence of sodium stearate (NaSt) on the precipitation of calcium carbonate during the semicontinuous process of slaked lime carbonation was studied in the systems in which process parameters, like total dissolved calcium concentration, temperature, CO2 flow rate and initial addition rate of slaked lime, were controlled. It was found that calcite was the only calcium carbonate polymorph that appeared under the investigated experimental conditions, while FT-IR spectroscopy and thermogravimetric analysis of samples confirmed the presence of stearate on the surface of precipitated calcium carbonate (PCC). Specific surface area of PCC increased with increasing stearate content: the highest value, s = 52.8 m2 g-1, was obtained at t = 20 °C, ctot = 17.0 mmol dm-3 and the stearate content of mNaSt/mCaO = 0.03. It was also found that hydrophobic calcite crystals in the form of rhombohedral and scalenohedral morphology can be produced at mNaSt/mCaO > 0.01. The exception is the case of nanosized PCC production, when much higher concentration of NaSt is needed, mNaSt/mCaO = 0.22. Minimal amount of stearate necessary to build up the monolayer and corresponding cross sectional area of one stearate molecule were estimated for the obtained calcite morphologies.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2951 - Mehanizmi taloženja anorganskih biokompatibilnih i srodnih materijala (Damir Kralj, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Damir Kralj (autor)

Avatar Url Jasminka Kontrec (autor)

Avatar Url Marko Ukrainczyk (autor)

Citiraj ovu publikaciju

Ukrainczyk, Marko; Kontrec, Jasminka; Kralj, Damir
Precipitation of different calcite crystal morphologies in the presence of sodium stearate // Journal of Colloid and Interface Science, 329 (2009), 1; 89-96 doi:10.1016/j.jcis.2008.09.045 (međunarodna recenzija, članak, znanstveni)
Ukrainczyk, M., Kontrec, J. & Kralj, D. (2009) Precipitation of different calcite crystal morphologies in the presence of sodium stearate. Journal of Colloid and Interface Science, 329 (1), 89-96 doi:10.1016/j.jcis.2008.09.045.
@article{article, year = {2009}, pages = {89-96}, DOI = {10.1016/j.jcis.2008.09.045}, keywords = {Precipitated calcium carbonate (PCC), Calcite, Carbonation, Adsorption, Stearate, Hydrophobicity}, journal = {Journal of Colloid and Interface Science}, doi = {10.1016/j.jcis.2008.09.045}, volume = {329}, number = {1}, issn = {0021-9797}, title = {Precipitation of different calcite crystal morphologies in the presence of sodium stearate}, keyword = {Precipitated calcium carbonate (PCC), Calcite, Carbonation, Adsorption, Stearate, Hydrophobicity} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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