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Adsorption of dispersants at a polyester resin-alkane interface

Notley, Shannon; Craig, Vincent; Fogden, Andrew; Evans, Drew R

Description

Non-aqueous colloidal dispersions form the basis of many real-world applications, including electro-rheological fluids in automotive assemblies and inks in printing devices. The dispersion of particles within the non-aqueous liquid is typically stabilised by the use of dispersants, which adsorb to the particle/liquid interface and provide steric and/or electrical forces to prevent their aggregation. Importantly, the selection of the dispersant influences not only the inter-particle forces, but...[Show more]

dc.contributor.authorNotley, Shannon
dc.contributor.authorCraig, Vincent
dc.contributor.authorFogden, Andrew
dc.contributor.authorEvans, Drew R
dc.date.accessioned2015-12-10T23:23:20Z
dc.identifier.issn0927-7757
dc.identifier.urihttp://hdl.handle.net/1885/66909
dc.description.abstractNon-aqueous colloidal dispersions form the basis of many real-world applications, including electro-rheological fluids in automotive assemblies and inks in printing devices. The dispersion of particles within the non-aqueous liquid is typically stabilised by the use of dispersants, which adsorb to the particle/liquid interface and provide steric and/or electrical forces to prevent their aggregation. Importantly, the selection of the dispersant influences not only the inter-particle forces, but also their summation across many particles then defines the bulk properties of the suspension. Tailoring of these bulk properties is important in an industrial context, as each application will demand different bulk properties. In this study, the adsorption of three dispersants onto a polyester resin surface from a simple alkane is investigated. It is shown that the competition between the rates of adsorption from the bulk relative to that of the internal relocation of the functional groups of already adsorbed material defines the total adsorbed mass and structure of the film. Dispersants that have a slow rate of adsorption and a relatively fast rate of internal reorganisation produce soft visco-elastic layers with less total adsorbed mass. Conversely, dispersants with fast rates of adsorption and relatively low rates of reorganisation produce stiffer more elastic films and a greater total adsorbed mass.
dc.publisherElsevier
dc.sourceColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.subjectKeywords: Non-aqueous dispersion; Polymer adsorption; QCM; Reconformation; Surface forces; Adsorption; Agglomeration; Functional groups; Paraffins; Phase interfaces; Polyester resins; Resins; Surfaces; Suspensions (fluids); alkane; decane; dispersant; hexadecane; m Non-aqueous dispersion; Polymer adsorption; QCM; Reconformation; Surface forces
dc.titleAdsorption of dispersants at a polyester resin-alkane interface
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume377
dc.date.issued2011
local.identifier.absfor091209 - Polymers and Plastics
local.identifier.absfor020405 - Soft Condensed Matter
local.identifier.absfor030603 - Colloid and Surface Chemistry
local.identifier.ariespublicationf2965xPUB1365
local.type.statusPublished Version
local.contributor.affiliationNotley, Shannon, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationCraig, Vincent, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFogden, Andrew, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationEvans, Drew R, University of South Australia
local.description.embargo2037-12-31
local.bibliographicCitation.issue1-3
local.bibliographicCitation.startpage318
local.bibliographicCitation.lastpage324
local.identifier.doi10.1016/j.colsurfa.2011.01.022
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-02-24T08:13:07Z
local.identifier.scopusID2-s2.0-79952038183
local.identifier.thomsonID000288773900041
CollectionsANU Research Publications

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