On particle bridging by small charged molecules
Leong, Y.K. (2004) On particle bridging by small charged molecules. Proceedings of Chemeca 2004 the 32nd Australasian Chemical Engineering Conference. Chemeca 2004 the 32nd Australasian Chemical Engineering Conference , 26 - 29 September 2004, Sydney, NSW, Australia .
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Particle bridging by small charged molecules was discovered quite recently. Only specific compounds with the appropriate structure and spatial position of the charged groups, display bridging behaviour. These compounds as a new class of functional additives are highly suitable for making strong gels and paste products. This type of bridging is highly directed towards maximising the strength of the flocculated network in dispersions. The small size of the molecules means that bridging can only take place at the closest point of interaction between particles (particle-particle bond) in the flocculated state, thus greatly strengthening the interparticle bond in the three-dimensional network. The yield stress is a measure of the strength of the network. Particle bridging by small molecules can increase the maximum yield stress (at zero net charge condition) by as much as 10-fold. In this paper the elements of molecular structure of additives essential for bridging are discussed.
|Item Type:||Conference Item (Refereed Research Paper - E1)|
|Keywords:||bridging; ceramic oxides; conformation; small molecules; yield stress|
|FoR Codes:||03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl Structural) > 030603 Colloid and Surface Chemistry @ 100%|
|SEO Codes:||86 MANUFACTURING > 8615 Instrumentation > 861503 Scientific Instruments @ 70%|
86 MANUFACTURING > 8610 Ceramics, Glass and Industrial Mineral Products > 861099 Ceramics, Glass and Industrial Mineral Products not elsewhere classified @ 30%
|Deposited On:||13 Apr 2010 09:19|
|Last Modified:||12 Feb 2011 03:07|
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