Mechanical, thermal and microscopic properties of gypsum matrix composites containing capric acid-palmitic acid/urea-formaldehyde microcapsules
Fatty acids have great prospects for application in alleviating the energy crisis for buildings owing to their low corrosiveness, nonseparation of supercooled phases, and low costs. Capric acid–palmitic acid/urea-formaldehyde (CA–PA/UF) phase-change microcapsules were prepared using binary eutectic...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523002644 |
| _version_ | 1797798941791617024 |
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| author | Chang Chen Litong Fang Yubin Wang Shaowu Jiu Yanxin Chen |
| author_facet | Chang Chen Litong Fang Yubin Wang Shaowu Jiu Yanxin Chen |
| author_sort | Chang Chen |
| collection | DOAJ |
| description | Fatty acids have great prospects for application in alleviating the energy crisis for buildings owing to their low corrosiveness, nonseparation of supercooled phases, and low costs. Capric acid–palmitic acid/urea-formaldehyde (CA–PA/UF) phase-change microcapsules were prepared using binary eutectic blends of CA and PA as the core materials and UF as the shell material. Subsequently, gypsum matrix composites were fabricated by mixing the prepared phase-change microcapsules in a gypsum matrix. The results show that the phase-change temperature and latent heat values of the binary eutectic fatty acid mixture in the optimal ratio of 0.85:0.15 were 26.7 °C and 189.7 J/g, respectively. The CA–PA/UF phase-change microcapsules were physically bound; that is, they were not chemically bound. Furthermore, the microcapsules did not react chemically with the gypsum matrix after incorporation and did not affect the crystal structures of the gypsum. The optimal content of the CA–PA/UF phase-change microcapsules was 10 wt%, at which the compressive strength, flexural strength, and thermal conductivity of the gypsum matrix composites were 4.90 MPa, 2.09 MPa, and 0.1854 W/(m·K), respectively. |
| first_indexed | 2024-03-13T04:11:27Z |
| format | Article |
| id | doaj.art-635b84005aff4d5783dbb1505868e349 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:11:27Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-635b84005aff4d5783dbb1505868e3492023-06-21T06:54:25ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e02084Mechanical, thermal and microscopic properties of gypsum matrix composites containing capric acid-palmitic acid/urea-formaldehyde microcapsulesChang Chen0Litong Fang1Yubin Wang2Shaowu Jiu3Yanxin Chen4College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Corresponding authors.College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR ChinaSchool of Resources Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, PR ChinaCollege of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR ChinaCollege of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Corresponding authors.Fatty acids have great prospects for application in alleviating the energy crisis for buildings owing to their low corrosiveness, nonseparation of supercooled phases, and low costs. Capric acid–palmitic acid/urea-formaldehyde (CA–PA/UF) phase-change microcapsules were prepared using binary eutectic blends of CA and PA as the core materials and UF as the shell material. Subsequently, gypsum matrix composites were fabricated by mixing the prepared phase-change microcapsules in a gypsum matrix. The results show that the phase-change temperature and latent heat values of the binary eutectic fatty acid mixture in the optimal ratio of 0.85:0.15 were 26.7 °C and 189.7 J/g, respectively. The CA–PA/UF phase-change microcapsules were physically bound; that is, they were not chemically bound. Furthermore, the microcapsules did not react chemically with the gypsum matrix after incorporation and did not affect the crystal structures of the gypsum. The optimal content of the CA–PA/UF phase-change microcapsules was 10 wt%, at which the compressive strength, flexural strength, and thermal conductivity of the gypsum matrix composites were 4.90 MPa, 2.09 MPa, and 0.1854 W/(m·K), respectively.http://www.sciencedirect.com/science/article/pii/S2214509523002644Fatty acidsPhase-change microcapsulesGypsum-based compositesMechanical propertiesThermal conductivity |
| spellingShingle | Chang Chen Litong Fang Yubin Wang Shaowu Jiu Yanxin Chen Mechanical, thermal and microscopic properties of gypsum matrix composites containing capric acid-palmitic acid/urea-formaldehyde microcapsules Case Studies in Construction Materials Fatty acids Phase-change microcapsules Gypsum-based composites Mechanical properties Thermal conductivity |
| title | Mechanical, thermal and microscopic properties of gypsum matrix composites containing capric acid-palmitic acid/urea-formaldehyde microcapsules |
| title_full | Mechanical, thermal and microscopic properties of gypsum matrix composites containing capric acid-palmitic acid/urea-formaldehyde microcapsules |
| title_fullStr | Mechanical, thermal and microscopic properties of gypsum matrix composites containing capric acid-palmitic acid/urea-formaldehyde microcapsules |
| title_full_unstemmed | Mechanical, thermal and microscopic properties of gypsum matrix composites containing capric acid-palmitic acid/urea-formaldehyde microcapsules |
| title_short | Mechanical, thermal and microscopic properties of gypsum matrix composites containing capric acid-palmitic acid/urea-formaldehyde microcapsules |
| title_sort | mechanical thermal and microscopic properties of gypsum matrix composites containing capric acid palmitic acid urea formaldehyde microcapsules |
| topic | Fatty acids Phase-change microcapsules Gypsum-based composites Mechanical properties Thermal conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523002644 |
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