Control of colloidal systems by means of thermoresponsive polymers

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dc.contributor.advisorSagués i Mestre, Francesc
dc.contributor.authorTerricabres Polo, Raimon
dc.date.accessioned2019-07-24T06:52:41Z
dc.date.available2019-07-24T06:52:41Z
dc.date.issued2019-06
dc.descriptionTreballs Finals de Grau de Química, Facultat de Química, Universitat de Barcelona, Any: 2019, Tutor: Francesc Sagués Mestreca
dc.description.abstractDisodium cromoglycate (DSCG) molecules in water pack in stacks, whose length and liquid crystal (LC) phases depends on temperature, concentration and the presence of depleting agents. In the present work, DSCG-Water LC phases and phase transitions are studied in free-depletant, non-thermoresponsive depletant (polyethylene glycol, PEG) and thermoresponsive depletant (poly(N-isopropylacrylamide), PNIPAM) mixtures. Nematic (N) to isotropic (I) phase transition temperature is increased in the presence of these depleting agents. PNIPAM loses that property above the lower critical solution temperature (LCST), whereas PEG effect is not modified. Both polymers depleting capacity is also compared by dynamic light scattering (DLS) analysis, showing that PNIPAM applies a stronger depletion force than PEG of the same molecular weight at 25 ºC. Finally, PNIPAM-functionalized surfaces and microgel particles have been synthesized and their thermoresponsive properties have been studiedca
dc.format.extent57 p.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/2445/137943
dc.language.isoengca
dc.rightscc-by-nc-nd (c) Terricabres, 2019
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.sourceTreballs Finals de Grau (TFG) - Química
dc.subject.classificationCristalls líquidscat
dc.subject.classificationCol·loidescat
dc.subject.classificationPolímerscat
dc.subject.classificationTreballs de fi de graucat
dc.subject.otherLiquid crystalseng
dc.subject.otherColloidseng
dc.subject.otherPolymerseng
dc.subject.otherBachelor's theses
dc.titleControl of colloidal systems by means of thermoresponsive polymerseng
dc.title.alternativeControl de sistemes col·loidals mitjançant polímers termosensiblesca
dc.typeinfo:eu-repo/semantics/bachelorThesisca

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Treballs Finals de Grau (TFG) - Química