Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell
This paper presents a novel approach to synthesize microencapsulated phase change materials (MEPCMs) with composite titania-polyurea (TiO2-PUA) shell at low temperature. MEPCM pre-microcapsules with PUA shell were first synthesized through interfacial polymerization in oil-in-water emulsion, followe...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/140844 |
| _version_ | 1826120472610209792 |
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| author | Zhao, Aiqin An, Jinliang Yang, Jinglei Yang, En-Hua |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhao, Aiqin An, Jinliang Yang, Jinglei Yang, En-Hua |
| author_sort | Zhao, Aiqin |
| collection | NTU |
| description | This paper presents a novel approach to synthesize microencapsulated phase change materials (MEPCMs) with composite titania-polyurea (TiO2-PUA) shell at low temperature. MEPCM pre-microcapsules with PUA shell were first synthesized through interfacial polymerization in oil-in-water emulsion, followed by deposition of TiO2 on the surface of pre-microcapsules in solution by means of the liquid phase deposition (LPD) method at low temperature. The two-step synthesis approach results in high yield of microcapsules and the MEPCMs with composite TiO2-PUA shell integrate advantages of both organic and inorganic shells. Results show that the MEPCMs have a well-defined core–shell structure with around 73 wt.% of core fraction and dense composite TiO2-PUA shell, which is thermally stable and durable and effectively lowers the evaporation and prevents leakage of the core material even under repeated heating and cooling. The MEPCMs also show mitigated supercooling, faster thermal response, and high thermal storage capacity. TiO2-PUA MEPCM-modified cement pastes showed distinct latent heat storage capacity. |
| first_indexed | 2024-10-01T05:17:21Z |
| format | Journal Article |
| id | ntu-10356/140844 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:17:21Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1408442020-06-02T07:17:52Z Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell Zhao, Aiqin An, Jinliang Yang, Jinglei Yang, En-Hua School of Civil and Environmental Engineering Engineering::Civil engineering Latent Heat Storage Phase Change Material (PCM) This paper presents a novel approach to synthesize microencapsulated phase change materials (MEPCMs) with composite titania-polyurea (TiO2-PUA) shell at low temperature. MEPCM pre-microcapsules with PUA shell were first synthesized through interfacial polymerization in oil-in-water emulsion, followed by deposition of TiO2 on the surface of pre-microcapsules in solution by means of the liquid phase deposition (LPD) method at low temperature. The two-step synthesis approach results in high yield of microcapsules and the MEPCMs with composite TiO2-PUA shell integrate advantages of both organic and inorganic shells. Results show that the MEPCMs have a well-defined core–shell structure with around 73 wt.% of core fraction and dense composite TiO2-PUA shell, which is thermally stable and durable and effectively lowers the evaporation and prevents leakage of the core material even under repeated heating and cooling. The MEPCMs also show mitigated supercooling, faster thermal response, and high thermal storage capacity. TiO2-PUA MEPCM-modified cement pastes showed distinct latent heat storage capacity. ASTAR (Agency for Sci., Tech. and Research, S’pore) 2020-06-02T07:17:52Z 2020-06-02T07:17:52Z 2018 Journal Article Zhao, A., An, J., Yang, J., & Yang, E.-H. (2018). Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell. Applied Energy, 215, 468-478. doi:10.1016/j.apenergy.2018.02.057 0306-2619 https://hdl.handle.net/10356/140844 10.1016/j.apenergy.2018.02.057 2-s2.0-85041825144 215 468 478 en Applied Energy © 2018 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Latent Heat Storage Phase Change Material (PCM) Zhao, Aiqin An, Jinliang Yang, Jinglei Yang, En-Hua Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell |
| title | Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell |
| title_full | Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell |
| title_fullStr | Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell |
| title_full_unstemmed | Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell |
| title_short | Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell |
| title_sort | microencapsulated phase change materials with composite titania polyurea tio2 pua shell |
| topic | Engineering::Civil engineering Latent Heat Storage Phase Change Material (PCM) |
| url | https://hdl.handle.net/10356/140844 |
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