Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin
The low thermal conductivity of paraffin and other organic phase change materials limits their use in thermal energy storage devices. The introduction of components with a high thermal conductivity such as graphene into these materials leads to an increase in their thermal conductivity. In this work...
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| Format: | Article |
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MDPI AG
2023-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/3/949 |
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| author | Svetlana N. Gorbacheva Yulia Yu. Borisova Veronika V. Makarova Sergey V. Antonov Dmitry N. Borisov Makhmut R. Yakubov |
| author_facet | Svetlana N. Gorbacheva Yulia Yu. Borisova Veronika V. Makarova Sergey V. Antonov Dmitry N. Borisov Makhmut R. Yakubov |
| author_sort | Svetlana N. Gorbacheva |
| collection | DOAJ |
| description | The low thermal conductivity of paraffin and other organic phase change materials limits their use in thermal energy storage devices. The introduction of components with a high thermal conductivity such as graphene into these materials leads to an increase in their thermal conductivity. In this work, we studied the use of inexpensive carbon fillers containing a polycyclic aromatic core, due to them having a structural similarity with graphene, to increase the thermal conductivity of paraffin. As such fillers, technogenic asphaltenes isolated from ethylene tar and their modified derivatives were used. It is shown that the optimal concentration of carbon fillers in the paraffin composite, which contributes to the formation of a structural framework and resistance to sedimentation, is 5 and 30 wt. %, while intermediate concentrations are ineffective, apparently due to the formation of large aggregates, the concentration of which is insufficient to form a strong framework. It has been found that the addition of asphaltenes modified with ammonium persulfate in acetic acid significantly increases the thermal conductivity of paraffin by up to 72%. |
| first_indexed | 2024-03-11T09:33:57Z |
| format | Article |
| id | doaj.art-094dd111e2c2433b83ba80fcb9d81298 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T09:33:57Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-094dd111e2c2433b83ba80fcb9d812982023-11-16T17:25:26ZengMDPI AGMolecules1420-30492023-01-0128394910.3390/molecules28030949Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of ParaffinSvetlana N. Gorbacheva0Yulia Yu. Borisova1Veronika V. Makarova2Sergey V. Antonov3Dmitry N. Borisov4Makhmut R. Yakubov5Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi Prospect V.O. 31, 199004 St. Petersburg, RussiaArbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov Str. 8, 420088 Kazan, RussiaInstitute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi Prospect V.O. 31, 199004 St. Petersburg, RussiaInstitute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi Prospect V.O. 31, 199004 St. Petersburg, RussiaArbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov Str. 8, 420088 Kazan, RussiaArbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov Str. 8, 420088 Kazan, RussiaThe low thermal conductivity of paraffin and other organic phase change materials limits their use in thermal energy storage devices. The introduction of components with a high thermal conductivity such as graphene into these materials leads to an increase in their thermal conductivity. In this work, we studied the use of inexpensive carbon fillers containing a polycyclic aromatic core, due to them having a structural similarity with graphene, to increase the thermal conductivity of paraffin. As such fillers, technogenic asphaltenes isolated from ethylene tar and their modified derivatives were used. It is shown that the optimal concentration of carbon fillers in the paraffin composite, which contributes to the formation of a structural framework and resistance to sedimentation, is 5 and 30 wt. %, while intermediate concentrations are ineffective, apparently due to the formation of large aggregates, the concentration of which is insufficient to form a strong framework. It has been found that the addition of asphaltenes modified with ammonium persulfate in acetic acid significantly increases the thermal conductivity of paraffin by up to 72%.https://www.mdpi.com/1420-3049/28/3/949phase change materialheat conductivityparaffin compositesethylene tartechnogenic asphalteneschemical modification |
| spellingShingle | Svetlana N. Gorbacheva Yulia Yu. Borisova Veronika V. Makarova Sergey V. Antonov Dmitry N. Borisov Makhmut R. Yakubov Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin Molecules phase change material heat conductivity paraffin composites ethylene tar technogenic asphaltenes chemical modification |
| title | Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin |
| title_full | Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin |
| title_fullStr | Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin |
| title_full_unstemmed | Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin |
| title_short | Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin |
| title_sort | modified technogenic asphaltenes as enhancers of the thermal conductivity of paraffin |
| topic | phase change material heat conductivity paraffin composites ethylene tar technogenic asphaltenes chemical modification |
| url | https://www.mdpi.com/1420-3049/28/3/949 |
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