Molecular configuration of adsorbed cis- and trans-1, 2-ethylene dicarboxylic acids and interparticle forces in colloidal dispersions

Leong, Y.K. (2002) Molecular configuration of adsorbed cis- and trans-1, 2-ethylene dicarboxylic acids and interparticle forces in colloidal dispersions. Langmuir, 18 (6). pp. 2448-2449.

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Abstract

[Extract] There has not been a study linking the molecular configuration of adsorbed small charged molecules and the interparticle forces in flocculated dispersions. This study will illustrate the linkage with cis- and trans-1,2-ethylene dicarboxylic acids in a 24 vol%R-Al2O3 dispersion. The interparticle forces were evaluated from the yield stress1-8 of the dispersion. The cis-form acid weakens the flocculated network structure by forming a steric layer. The trans-form acid greatly reinforces this structure by bridging at the joints and network junctions. As a result, the dispersion developed a high yield stress and viscosity. This study may give rise to a new family of thickening agents based on small organic molecules that may be of use in products such as toothpaste, printing inks, cosmetics, paints, concrete mix, and paper-coating slurries.

Item ID: 13613
Item Type: Article (Research - C1)
ISSN: 1520-5827
Keywords: bridging; dispersions; yield stress
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Date Deposited: 20 Dec 2010 02:35
FoR Codes: 03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl Structural) > 030603 Colloid and Surface Chemistry @ 100%
SEO Codes: 86 MANUFACTURING > 8601 Processed Food Products and Beverages (excl. Dairy Products) > 860199 Processed Food Products and Beverages (excl. Dairy Products) not elsewhere classified @ 100%
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