Preparation of polymeric microcapsules using modified calcium carbonate as a template

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dc.contributor.advisorXiao, Huining
dc.contributor.authorAgbaku, Selassie
dc.date.accessioned2023-03-01T16:27:56Z
dc.date.available2023-03-01T16:27:56Z
dc.date.issued2015
dc.date.updated2020-03-23T00:00:00Z
dc.description.abstractMicrocapsules consisting of acrylamide, methyl methacrylate and styrene were prepared via in-situ polymerization on the surface/inside pores of modified calcium carbonate particles as templates, followed by the dissolution of the carbonate cores in hydrochloric acid solution. The capsules were further modified via copolymerization with diallyldimethylammonium chloride (DADMAC) and N-isopropylacrylamide (NIPAM) using similar templates in an attempt to improve their properties. The microcapsules were characterized using confocal laser fluorescence microscopy (CLSM) and scanning electron microscopy (SEM). The adsorption and release properties of these capsules were studied. Results showed that the adsorption of dye on capsules did not occur as both Langmuir and Freundlich models were unfitting despite the high linear regression values. The addition of DADMAC improved the absorbtion of methylene blue while slightly decreasing the cumulative amount released. On the contrary, although NIPAM did not make a significant difference to the adsorption of the cationic dye it did however accelerate the release at 37°C, implying the thermal responsive behaviour induced by NIPAM segments incorporated into the capsules.
dc.description.copyrightNot available for use outside of the University of New Brunswick
dc.description.noteTitle has a period at the end of it in PDF. Corrected. "Preparation of polymeric microcapsules using modified calcium carbonate as a template." Electronic Only.
dc.description.noteM.Sc.E. University of New Brunswick, Department of Chemical Engineering, 2015.
dc.formattext/xml
dc.format.extentxxi, 149 pages ; illustrations
dc.format.mediumelectronic
dc.identifier.oclc(OCoLC)1145701721
dc.identifier.otherThesis 9540
dc.identifier.urihttps://unbscholar.lib.unb.ca/handle/1882/13904
dc.language.isoen_CA
dc.publisherUniversity of New Brunswick
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.subject.disciplineChemical Engineering
dc.subject.lcshMicroencapsulation.
dc.subject.lcshPolymerization.
dc.subject.lcshPolymers.
dc.subject.lcshCalcium carbonate.
dc.subject.lcshAdsorption.
dc.subject.lcshChemical engineering.
dc.titlePreparation of polymeric microcapsules using modified calcium carbonate as a template
dc.typemaster thesis
thesis.degree.disciplineChemical Engineering
thesis.degree.fullnameMaster of Science in Engineering
thesis.degree.grantorUniversity of New Brunswick
thesis.degree.levelmasters
thesis.degree.nameM.Sc.E.

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