Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its Characterization
The use of adequate thermal energy storage (TES) systems is an efficient way to achieve thermal comfort in buildings reducing the cooling and heating demand. Besides, deploy phase change materials (PCM) to meet and enhance the TES needs is highly effective and widely studied. In this paper, a study...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/4/982 |
| _version_ | 1797396729570525184 |
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| author | Marc Majó Ricard Sánchez Pol Barcelona Jordi García Ana Inés Fernández Camila Barreneche |
| author_facet | Marc Majó Ricard Sánchez Pol Barcelona Jordi García Ana Inés Fernández Camila Barreneche |
| author_sort | Marc Majó |
| collection | DOAJ |
| description | The use of adequate thermal energy storage (TES) systems is an efficient way to achieve thermal comfort in buildings reducing the cooling and heating demand. Besides, deploy phase change materials (PCM) to meet and enhance the TES needs is highly effective and widely studied. In this paper, a study of the degradation of two fatty acids is presented, capric and myristic acids, in order to evaluate whether their thermo-physical properties are affected throughout time during service. This was carried out by means of two different types of thermal treatments: degradation at constant temperature (thermal stability test), 60 °C during 100 h and 500 h, and degradation with heating and cooling cycling (thermal cycling stability), between a temperature range from 15 °C to 70 °C with 0.5 °C/min ramp during 500 and 1000 cycles. Despite no significant changes were measured for myristic acid, experimental results revealed a decrease of melting enthalpy of 6.6% in capric acid thermally treated for 500 h. Evidences of chemical degradation were found that might explain the decrease in thermophysical properties during use. |
| first_indexed | 2024-03-09T00:55:42Z |
| format | Article |
| id | doaj.art-89017bf723a84eb0a5509dcf346ae874 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T00:55:42Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-89017bf723a84eb0a5509dcf346ae8742023-12-11T16:54:35ZengMDPI AGMolecules1420-30492021-02-0126498210.3390/molecules26040982Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its CharacterizationMarc Majó0Ricard Sánchez1Pol Barcelona2Jordi García3Ana Inés Fernández4Camila Barreneche5Department of Materials Science and Physical Chemistry, Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, SpainDepartment of Materials Science and Physical Chemistry, Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, SpainDepartment of Materials Science and Physical Chemistry, Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, SpainDepartament de Química Inorgànica i Orgànica, Secció de Química Orgànica, Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, SpainDepartment of Materials Science and Physical Chemistry, Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, SpainDepartment of Materials Science and Physical Chemistry, Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, SpainThe use of adequate thermal energy storage (TES) systems is an efficient way to achieve thermal comfort in buildings reducing the cooling and heating demand. Besides, deploy phase change materials (PCM) to meet and enhance the TES needs is highly effective and widely studied. In this paper, a study of the degradation of two fatty acids is presented, capric and myristic acids, in order to evaluate whether their thermo-physical properties are affected throughout time during service. This was carried out by means of two different types of thermal treatments: degradation at constant temperature (thermal stability test), 60 °C during 100 h and 500 h, and degradation with heating and cooling cycling (thermal cycling stability), between a temperature range from 15 °C to 70 °C with 0.5 °C/min ramp during 500 and 1000 cycles. Despite no significant changes were measured for myristic acid, experimental results revealed a decrease of melting enthalpy of 6.6% in capric acid thermally treated for 500 h. Evidences of chemical degradation were found that might explain the decrease in thermophysical properties during use.https://www.mdpi.com/1420-3049/26/4/982thermal energy storagephase change materialsfatty acidsdegradationDSCTGA |
| spellingShingle | Marc Majó Ricard Sánchez Pol Barcelona Jordi García Ana Inés Fernández Camila Barreneche Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its Characterization Molecules thermal energy storage phase change materials fatty acids degradation DSC TGA |
| title | Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its Characterization |
| title_full | Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its Characterization |
| title_fullStr | Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its Characterization |
| title_full_unstemmed | Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its Characterization |
| title_short | Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its Characterization |
| title_sort | degradation of fatty acid phase change materials pcm new approach for its characterization |
| topic | thermal energy storage phase change materials fatty acids degradation DSC TGA |
| url | https://www.mdpi.com/1420-3049/26/4/982 |
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