Preparation and Characterization of Bio-based PCM Microcapsules for Thermal Energy Storage

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dc.contributor.advisorLeung, Siu-Ning
dc.creatorFashandi, Maryam
dc.date.accessioned2018-11-21T13:37:34Z
dc.date.available2018-11-21T13:37:34Z
dc.date.copyright2017-10-13
dc.date.issued2018-11-21
dc.date.updated2018-11-21T13:37:33Z
dc.degree.disciplineMechanical Engineering
dc.degree.levelMaster's
dc.degree.nameMASc - Master of Applied Science
dc.description.abstractPhase change materials (PCM) have gained extensive attention in thermal energy storage applications. During their phase transition, the energy can be stored in or released from PCM. While changing from solid state to liquid state, PCM start to flow. Encapsulation is a widely-used technique to prevent PCM from migrating and reacting with their environment. In the first phase of the thesis, microencapsulation of 100% bio-based (organic) PCM microcapsules by solvent evaporation and oil-in-water emulsification was investigated under different conditions, resulting in optimal properties. For the second phase, the focus was on the studies of inorganic PCM, which have higher latent heat of melting, higher thermal conductivity and lower price than the organic PCM. However, their supercooling, phase segregation, and hydrophilic nature have caused major challenges to their applications. Tuning the thermal properties, including crystallization temperature and phase segregation of inorganic PCM by using bio-based nanoparticles and other additives was investigated in the second part of the research. Due to the hydrophilic nature of the inorganic PCM, a double emulsion (water in oil in water) solvent evaporation technique was explored for encapsulation with a polymeric shell. The challenges and strategies for supercooling prevention and encapsulating the hydrophilic PCM were investigated.
dc.identifier.urihttp://hdl.handle.net/10315/35456
dc.language.isoen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectMaterials Science
dc.subject.keywordsChitin nanowhisker
dc.subject.keywordsLatent heat
dc.subject.keywordsPhase change materials
dc.subject.keywordsSodium acetate trihydrate
dc.subject.keywordsSupercooling
dc.subject.keywordsThermal conductivity
dc.subject.keywordsBio-based microPCM
dc.subject.keywordsEncapsulation
dc.subject.keywordsPalmitic acid
dc.subject.keywordsPolylactic acid
dc.subject.keywordsSolvent evaporation
dc.subject.keywordsSingle emulsion
dc.subject.keywordsDouble emulsion
dc.subject.keywordsOil in water
dc.subject.keywordsWater in oil in water
dc.subject.keywordsSurfactant
dc.subject.keywordsPolyvinyl alcohol
dc.subject.keywordsSDS
dc.subject.keywordsPhase segregation
dc.titlePreparation and Characterization of Bio-based PCM Microcapsules for Thermal Energy Storage
dc.typeElectronic Thesis or Dissertation

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