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Key criteria for the design of polymeric stabilizers for aqueous titanium dioxide dispersions of high solid content

Key criteria for the design of polymeric stabilizers for aqueous titanium dioxide dispersions of... AbstractAmphiphilic copolymers consisting of an aminated hydrophobic block and a hydrophilic poly(sodium methacrylate) one have been synthesized with different structures and tested as stabilizers for aqueous dispersions of alumina coated titanium dioxide (80 wt.-% solid). The dispersion stability is ruled by the strength of the anchoring of the aminated block onto the pigment and by the dynamics of the micelles formed by the copolymer. Any decrease in the anchoring strength, for example as a result of higher steric hindrance for the adsorbing block or of random rather than blocky distribution of the aminated co-units, is detrimental to the dispersion stability and makes this stability more dependent on the copolymer composition. Indeed, the position and dynamics of the unimers ⇄ micelles equilibrium then control the adsorption of the copolymer on the pigment during the grinding process. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png e-Polymers de Gruyter

Key criteria for the design of polymeric stabilizers for aqueous titanium dioxide dispersions of high solid content

e-Polymers , Volume 1 (1): 1 – Dec 1, 2001

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Publisher
de Gruyter
Copyright
© 2013 by Walter de Gruyter GmbH & Co.
ISSN
2197-4586
eISSN
1618-7229
DOI
10.1515/epoly.2001.1.1.124
Publisher site
See Article on Publisher Site

Abstract

AbstractAmphiphilic copolymers consisting of an aminated hydrophobic block and a hydrophilic poly(sodium methacrylate) one have been synthesized with different structures and tested as stabilizers for aqueous dispersions of alumina coated titanium dioxide (80 wt.-% solid). The dispersion stability is ruled by the strength of the anchoring of the aminated block onto the pigment and by the dynamics of the micelles formed by the copolymer. Any decrease in the anchoring strength, for example as a result of higher steric hindrance for the adsorbing block or of random rather than blocky distribution of the aminated co-units, is detrimental to the dispersion stability and makes this stability more dependent on the copolymer composition. Indeed, the position and dynamics of the unimers ⇄ micelles equilibrium then control the adsorption of the copolymer on the pigment during the grinding process.

Journal

e-Polymersde Gruyter

Published: Dec 1, 2001

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