Carbon Foam-Reinforced Polyimide-Based Carbon Aerogel Composites Prepared via Co-Carbonization as Insulation Material
The weak inherent non-covalent interactions between carbon aerogel backbone nanoparticles obtained by the pyrolysis of conventional organic aerogel can lead to poor mechanical properties. When applied in the thermal protection system of a high-speed spacecraft, the preparation of carbon aerogel insu...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/8/5/308 |
| _version_ | 1827668802946465792 |
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| author | Zixuan Zheng Guojie Liang Li Li Jing Liu Xinbo Wang Yi Sun Kai Li |
| author_facet | Zixuan Zheng Guojie Liang Li Li Jing Liu Xinbo Wang Yi Sun Kai Li |
| author_sort | Zixuan Zheng |
| collection | DOAJ |
| description | The weak inherent non-covalent interactions between carbon aerogel backbone nanoparticles obtained by the pyrolysis of conventional organic aerogel can lead to poor mechanical properties. When applied in the thermal protection system of a high-speed spacecraft, the preparation of carbon aerogel insulation materials with excellent formability and high mechanical strength still remains a huge challenge. This work reports an efficient approach for fabricating carbon foam-reinforced carbon aerogel composites by compounding the nanoporous polyimide aerogel into the microporous pre-carbonized phenolic resin-based carbon foam via vacuum impregnation, gelatinizing and co-carbonization. Benefiting from the co-shrinkage caused by co−carbonization, the thermal insulation capacity of the carbon aerogel and the formability of the pre−carbonized foam are efficiently utilized. The shrinkage, density and carbon yield of aerogels, pre-carbonized foams and the composites at different temperatures were measured to analyze the formation of the interfacial gap within the composite. The co-carbonization mechanism of the polyimide aerogels and phenolic resin-based pre-carbonized foams was analyzed through XPS, TG-MS, and FT-IR. Among the prepared samples, CF30-CPI-1000 °C with small interfacial gaps showed the lowest thermal conductivity, which was as low as 0.56 W/(m·K) at 1900 °C, and the corresponding compressive strength and elastic modulus were as high as 0.532 MPa and 9.091 MPa, respectively. |
| first_indexed | 2024-03-10T03:51:41Z |
| format | Article |
| id | doaj.art-de9243cdbac2476b919717decce470f3 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-10T03:51:41Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-de9243cdbac2476b919717decce470f32023-11-23T11:08:00ZengMDPI AGGels2310-28612022-05-018530810.3390/gels8050308Carbon Foam-Reinforced Polyimide-Based Carbon Aerogel Composites Prepared via Co-Carbonization as Insulation MaterialZixuan Zheng0Guojie Liang1Li Li2Jing Liu3Xinbo Wang4Yi Sun5Kai Li6State Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, 35 Huayuan North Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, 35 Huayuan North Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, 35 Huayuan North Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, 35 Huayuan North Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, 35 Huayuan North Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, 35 Huayuan North Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, 35 Huayuan North Road, Haidian District, Beijing 100083, ChinaThe weak inherent non-covalent interactions between carbon aerogel backbone nanoparticles obtained by the pyrolysis of conventional organic aerogel can lead to poor mechanical properties. When applied in the thermal protection system of a high-speed spacecraft, the preparation of carbon aerogel insulation materials with excellent formability and high mechanical strength still remains a huge challenge. This work reports an efficient approach for fabricating carbon foam-reinforced carbon aerogel composites by compounding the nanoporous polyimide aerogel into the microporous pre-carbonized phenolic resin-based carbon foam via vacuum impregnation, gelatinizing and co-carbonization. Benefiting from the co-shrinkage caused by co−carbonization, the thermal insulation capacity of the carbon aerogel and the formability of the pre−carbonized foam are efficiently utilized. The shrinkage, density and carbon yield of aerogels, pre-carbonized foams and the composites at different temperatures were measured to analyze the formation of the interfacial gap within the composite. The co-carbonization mechanism of the polyimide aerogels and phenolic resin-based pre-carbonized foams was analyzed through XPS, TG-MS, and FT-IR. Among the prepared samples, CF30-CPI-1000 °C with small interfacial gaps showed the lowest thermal conductivity, which was as low as 0.56 W/(m·K) at 1900 °C, and the corresponding compressive strength and elastic modulus were as high as 0.532 MPa and 9.091 MPa, respectively.https://www.mdpi.com/2310-2861/8/5/308polyimide aerogelcarbon aerogelthermal conductivityshrinkageco-carbonization mechanism |
| spellingShingle | Zixuan Zheng Guojie Liang Li Li Jing Liu Xinbo Wang Yi Sun Kai Li Carbon Foam-Reinforced Polyimide-Based Carbon Aerogel Composites Prepared via Co-Carbonization as Insulation Material Gels polyimide aerogel carbon aerogel thermal conductivity shrinkage co-carbonization mechanism |
| title | Carbon Foam-Reinforced Polyimide-Based Carbon Aerogel Composites Prepared via Co-Carbonization as Insulation Material |
| title_full | Carbon Foam-Reinforced Polyimide-Based Carbon Aerogel Composites Prepared via Co-Carbonization as Insulation Material |
| title_fullStr | Carbon Foam-Reinforced Polyimide-Based Carbon Aerogel Composites Prepared via Co-Carbonization as Insulation Material |
| title_full_unstemmed | Carbon Foam-Reinforced Polyimide-Based Carbon Aerogel Composites Prepared via Co-Carbonization as Insulation Material |
| title_short | Carbon Foam-Reinforced Polyimide-Based Carbon Aerogel Composites Prepared via Co-Carbonization as Insulation Material |
| title_sort | carbon foam reinforced polyimide based carbon aerogel composites prepared via co carbonization as insulation material |
| topic | polyimide aerogel carbon aerogel thermal conductivity shrinkage co-carbonization mechanism |
| url | https://www.mdpi.com/2310-2861/8/5/308 |
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