Controlled crystallization of vaterite from viscous solutions of organic colloids

Ladislav Pach, Sridhar Komarneni, Rustum Roy

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29 Scopus citations

Abstract

Precipitation of calcium carbonate from hydroxyethyl cellulose (HEC) containing aqueous solutions of CaCl2 and Na2Co3 resulted in an uncommon polymorph, vaterite. In contrast to precipitations without HEC, crystallization in the presence of HEC led to a shell-shaped body consisting of organized vaterite platelets. The artificial shell is a composite of stacks of vaterite and about 2% HEC. In the experimental arrangement used, HEC controlled both nucleation and crystal growth of vaterite. Concentration of HEC also affected the platelet's thickness which in turn influenced the shell's morphology as well. These results demonstrate the importance of organic-inorganic interface in controlling crystallization.

Original languageEnglish (US)
Pages (from-to)2928-2932
Number of pages5
JournalJournal of Materials Research
Volume5
Issue number12
DOIs
StatePublished - Dec 1990

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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