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dc.contributor.authorSwift, Thomas
dc.date.accessioned2023-03-07T12:30:46Z
dc.date.accessioned2023-03-24T12:29:19Z
dc.date.available2023-03-07T12:30:46Z
dc.date.available2023-03-24T12:29:19Z
dc.date.issued2023-04
dc.identifier.citationSwift T (2023) Stabilisation of acrylic latexes containing silica nanoparticles for dirt repellent coating applications. Polymer. 271: 125830.en_US
dc.identifier.urihttp://hdl.handle.net/10454/19377
dc.descriptionYesen_US
dc.description.abstractThis study examines the feasibility of using colloidal silica nanoparticles as active agents in high concentration waterborne polymer latex formulations. We showed that distributing the silica throughout the waterborne emulsion formed a composite coating material with a hydrophilic surface that consequently reduced exterior dirt pickup. Two grades of silica nanoparticles were studied, one using sodium stabilisation and another using epoxysilane modification to introduce glycidox-ypropyltrimethoxysilane surface functionality. Rheological study of the waterborne latex on mixing showed that there was an immediate pH responsive interaction between the silica sols and the polymer latex. Once loading of sodium charge stabilised silica NPs exceeded the volume required for heteroflocculation to occur the mixture demonstrated the potential to gel on standing – a process which took weeks, or months, to occur depending on the pH and relative concentrations used. At least fifty percent silane modification to the NP surface was found to be necessary to maintain a stable colloidal dispersion for long term storage of the waterborne latex. Despite this both grades of silica were found to imbue reductions in dirt pickup when applied to exterior masonry concrete studies over a 3-month weathering testen_US
dc.description.sponsorshipThis work was supported by the Royal Society of Chemistry [E21-8346952505].en_US
dc.language.isoenen_US
dc.publisherElsevier
dc.rights© 2023 Published by Elsevier Ltd. This work is licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/en_US
dc.subjectSilica nanoparticlesen_US
dc.subjectHigh concentration polymer latex solutionsen_US
dc.subjectWaterborne emulsionen_US
dc.subjectDirt repellenten_US
dc.titleStabilisation of acrylic latexes containing silica nanoparticles for dirt repellent coating applicationsen_US
dc.status.refereedYesen_US
dc.date.Accepted2023-02-27
dc.date.application2023-03-01
dc.typeArticleen_US
dc.type.versionPublished versionen_US
dc.identifier.doihttps://doi.org/10.1016/j.polymer.2023.125830
dc.rights.licenseCC-BYen_US
dc.date.updated2023-03-07T12:30:49Z
refterms.dateFOA2023-03-24T12:30:14Z
dc.openaccess.statusopenAccessen_US


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