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Effect of poly(acrylic acid) molecular mass and end-group functionality on calcium oxalate crystal morphology and growth

East, Chris P., Wallace, Andrew D. , Al-Hamzah, Ali , Doherty, William O.S., & Fellows, Christopher M. (2010) Effect of poly(acrylic acid) molecular mass and end-group functionality on calcium oxalate crystal morphology and growth. Journal of Applied Polymer Science, 115(4), pp. 2127-2135.

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Abstract

A number of series of poly(acrylic acids) (PAA) of differing end-groups and molecular mass were used to study the inhibition of calcium oxalate crystallization. The effects of the end-group on crystal speciation and morphology were significant and dramatic, with hexyl-isobutyrate end groups giving preferential formation of calcium oxalate dihydrate (COD) rather than the more stable calcium oxalate monohydrate (COM), while both more hydrophobic end-groups and less-hydrophobic end groups led predominantly to formation of the least thermodynamically stable form of calcium oxalate, calcium oxalate trihydrate. Conversely, molecular mass had little impact on calcium oxalate speciation or crystal morphology. It is probable that the observed effects are related to the rate of desorption of the PAA moiety from the crystal (lite) surfaces and that the results point to a major role for end-group as well as molecular mass in controlling desorption rate.

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5 citations in Scopus
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4 citations in Web of Science®

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ID Code: 34326
Item Type: Journal Article
Additional URLs:
Keywords: crystallization, polyelectrolytes, SEM (Scanning Electron Microscopy), XRD (X-Ray Diffraction)
DOI: 10.1002/app.31342
ISSN: 0021-8995
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > MACROMOLECULAR AND MATERIALS CHEMISTRY (030300) > Macromolecular and Materials Chemistry not elsewhere classified (030399)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > OTHER CHEMICAL SCIENCES (039900) > Industrial Chemistry (039903)
Divisions: Past > Schools > Chemistry
Current > Research Centres > Centre for Tropical Crops and Biocommodities
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2009 Wiley Periodicals, Inc.
Deposited On: 03 Sep 2010 10:11
Last Modified: 01 Mar 2012 00:18

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