Modeling the effect of molecular architecture of comb polymers on the behavior of Al2O3 dispersions using charge/composition factors (CCF)

Open access
Date
2014-07Type
- Journal Article
ETH Bibliography
yes
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Abstract
In this work, we study the effect of periodicity and PEO side-chain length in four PMAA-PEO (sodium salt) comb polymers with known molecular architecture on Al2O3 colloidal dispersions in DI water. We introduce here charge composition factors (CCF) representing charge density of the comb polymers defined as (number of charged units in a repeating unit)/(molecular weight of a repeating unit). We find, for the first time to our knowledge, that the CCF can be used along with dispersant dosage to obtain explicit functions predicting the conductivity of the dispersants in solution, the zeta potential behavior during dispersant titrations, and the isoelectric point (IEP) of the dispersions. In addition, the dosage normalized by the CCF provides a basis for comparison for the dispersants to elucidate the trends found in adsorption and potentiometric titrations. Thus, the CCF can be used as a tool for the design of improved and new comb polymer molecular architectures. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000087178Publication status
publishedExternal links
Journal / series
Colloid and Polymer ScienceVolume
Pages / Article No.
Publisher
SpringerSubject
Comb-polymer; Colloid; Al2O3; Zeta-potential; Modeling; Isoelectric point; Molecular architecture; AdsorptionNotes
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.More
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ETH Bibliography
yes
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