Preparation, characterization, and thermal properties of microencapsulated palmitic acid with ethyl cellulose shell as phase change material impregnated wood

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dc.contributor.authorCan, Ahmet
dc.date.accessioned2026-02-12T21:05:12Z
dc.date.available2026-02-12T21:05:12Z
dc.date.issued2023
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractIn this work, palmitic acid (PA) was encapsulated in ethyl cellulose (EC) by emulsification-solvent evaporation method. The morphology and particle size of the PCMs were examined using SEM and particle size analysis, and similar particle size (80 % is between 0 and 100 & mu;m) was observed. The crystal phase and chemical structure of microencapsulated phase change materials (MPCM) were measured by XRD (X-ray diffractometer) and FTIR (Fourier transformation infrared spec-troscope), observed that there is no chemical bond between EC and PA, but a physical bond. TGA (thermogravimetric analyzer) and DSC (differential scanning calorimeter) analysis were used to thermal properties including phase change temperature, enthalpy, thermal stability, the thermal conductivity of MPCM, and MPCMW. The results show that MPCM possesses excellent thermal stability at working temperature, and the most satisfying samples are MPCM2,3 with phase change enthalpy of 98.85 J/g, 135.1 J/g, and phase change temperature of 58.29 degrees C and 60.76 degrees C (medium-temperature zone (buildings fields)), respectively. Microen-capsulation of PA with EC is one of the most important achievements of the study. Poplar (Populus euramericana) wood samples were impregnated with MPCM using a vacuum-pressure process (MPCMW). After impregnation, approximately 15 % weight gain was obtained in wood samples. It was determined that there was no change in the chemical structure and crystallinity ratios of the impregnated samples by FTIR and XRD, and thermal decomposition took place in two stages by TGA analysis. MPCMW samples started to decompose at 200 degrees C. Latent heat storage of 30.8-82.62 J/g between 59.70 and 61.73 degrees C was measured for MPCMW. MPCMW had great durability with latent heat of 40-50 J/g after 50 heating-cooling cycles. The thermal conductivity enhancements are about 40 % higher than the reported corresponding values for poplar wood. Using the microcapsule-impregnated wood, a new method for developing and utilizing high-value poplar wood in the energy storage is provided.
dc.description.sponsorshipTurkish Scientific and Research Council (TUBITAK); [118C498]
dc.description.sponsorshipThe authors thank associate professor M. Said Ceyhan for laboratory support, Prof. Dr. Eylem Dizman Tomak, and associate professor Rasim Alper Oral for project advisor. The authors would like to acknowledge funding from the Turkish Scientific and Research Council (TUBITAK) under project number 118C498 for the scholarship of the visiting researcher Dr. Ahmet Can to do this post-doc study at the Bursa Technical University, Bursa, Tuerkiye.
dc.identifier.doi10.1016/j.est.2023.107382
dc.identifier.issn2352-152X
dc.identifier.issn2352-1538
dc.identifier.scopus2-s2.0-85152895945
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.est.2023.107382
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6846
dc.identifier.volume66
dc.identifier.wosWOS:001053811800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Energy Storage
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20260212
dc.subjectCalcium-Carbonate Shell
dc.subjectEnergy-Storage
dc.subjectMyristic Acid
dc.subjectConductivity
dc.subjectMicrocapsules
dc.subjectPerformance
dc.subjectComposite
dc.subjectEncapsulation
dc.subjectMixture
dc.titlePreparation, characterization, and thermal properties of microencapsulated palmitic acid with ethyl cellulose shell as phase change material impregnated wood
dc.typeArticle

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