Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection
In this paper, a new type of microencapsulated phase change materials (MPCMs) with docosane as the core and titanium dioxide (TiO<sub>2</sub>) as the shell was prepared by in situ polymerization. Its phase transition temperature was approximately 40 °C, and it can be used as a phase chan...
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MDPI AG
2022-07-01
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| Online Access: | https://www.mdpi.com/1996-1073/15/15/5354 |
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| author | Hongbing Chen Rui Zhao Congcong Wang Lianyuan Feng Shuqian Li Yutong Gong |
| author_facet | Hongbing Chen Rui Zhao Congcong Wang Lianyuan Feng Shuqian Li Yutong Gong |
| author_sort | Hongbing Chen |
| collection | DOAJ |
| description | In this paper, a new type of microencapsulated phase change materials (MPCMs) with docosane as the core and titanium dioxide (TiO<sub>2</sub>) as the shell was prepared by in situ polymerization. Its phase transition temperature was approximately 40 °C, and it can be used as a phase change material (PCM) in a low-temperature solar heat collection system. The properties of the new material were examined including the microstructure, the chemical elements on the surface of the microcapsules, and thermal conductivity. In addition, to obtain the optimized formula of the microcapsules, single-factor analysis on the emulsifier type, its mass fraction, ultrasonic oscillation time, pH, and core–shell ratio were performed. The results showed that the MPCMs prepared in this paper had a particle size of 2–5 μm and were spherical. Its surface was uniform and smooth without cracks, and the TiO<sub>2</sub> was well dispersed around the docosane, completely coating the docosane without impurities. The MPCMs had good performance in terms of thermal properties and heat storage when using 0.40% SDS as an emulsifier, 10 min ultrasonic, a 3.5 pH value, and a 1:1 core–shell ratio. However, the stirring method, time, and experimental reaction temperature also affected the properties of the material, which was not studied in this experiment. We will continue to study these factors in the future. |
| first_indexed | 2024-03-09T10:08:03Z |
| format | Article |
| id | doaj.art-04282cb0fd8640ad9900610f1818040b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T10:08:03Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-04282cb0fd8640ad9900610f1818040b2023-12-01T22:54:26ZengMDPI AGEnergies1996-10732022-07-011515535410.3390/en15155354Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat CollectionHongbing Chen0Rui Zhao1Congcong Wang2Lianyuan Feng3Shuqian Li4Yutong Gong5School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, ChinaState Key Laboratory of Building Safety and Environment, China Academy of Building Research, Beijing 100013, ChinaSchool of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, ChinaSchool of Civil Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, ChinaSchool of Civil Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, ChinaSchool of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, ChinaIn this paper, a new type of microencapsulated phase change materials (MPCMs) with docosane as the core and titanium dioxide (TiO<sub>2</sub>) as the shell was prepared by in situ polymerization. Its phase transition temperature was approximately 40 °C, and it can be used as a phase change material (PCM) in a low-temperature solar heat collection system. The properties of the new material were examined including the microstructure, the chemical elements on the surface of the microcapsules, and thermal conductivity. In addition, to obtain the optimized formula of the microcapsules, single-factor analysis on the emulsifier type, its mass fraction, ultrasonic oscillation time, pH, and core–shell ratio were performed. The results showed that the MPCMs prepared in this paper had a particle size of 2–5 μm and were spherical. Its surface was uniform and smooth without cracks, and the TiO<sub>2</sub> was well dispersed around the docosane, completely coating the docosane without impurities. The MPCMs had good performance in terms of thermal properties and heat storage when using 0.40% SDS as an emulsifier, 10 min ultrasonic, a 3.5 pH value, and a 1:1 core–shell ratio. However, the stirring method, time, and experimental reaction temperature also affected the properties of the material, which was not studied in this experiment. We will continue to study these factors in the future.https://www.mdpi.com/1996-1073/15/15/5354microencapsulated phase change materialcore–shell rationanoparticlesthermal property |
| spellingShingle | Hongbing Chen Rui Zhao Congcong Wang Lianyuan Feng Shuqian Li Yutong Gong Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection Energies microencapsulated phase change material core–shell ratio nanoparticles thermal property |
| title | Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection |
| title_full | Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection |
| title_fullStr | Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection |
| title_full_unstemmed | Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection |
| title_short | Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection |
| title_sort | preparation and characterization of microencapsulated phase change materials for solar heat collection |
| topic | microencapsulated phase change material core–shell ratio nanoparticles thermal property |
| url | https://www.mdpi.com/1996-1073/15/15/5354 |
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