Configuration of Multifunctional Polyimide/Graphene/Fe<sub>3</sub>O<sub>4</sub> Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-Stealth
Electromagnetic (EM) and infrared (IR) stealth play an important role in the development of military technology and the defense industry. This study focused on developing a new type of multifunctional composite film based on polyimide (PI)/graphene/Fe<sub>3</sub>O<sub>4</sub>...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/11/3038 |
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| author | Tao Shi Zhiheng Zheng Huan Liu Dezhen Wu Xiaodong Wang |
| author_facet | Tao Shi Zhiheng Zheng Huan Liu Dezhen Wu Xiaodong Wang |
| author_sort | Tao Shi |
| collection | DOAJ |
| description | Electromagnetic (EM) and infrared (IR) stealth play an important role in the development of military technology and the defense industry. This study focused on developing a new type of multifunctional composite film based on polyimide (PI)/graphene/Fe<sub>3</sub>O<sub>4</sub> hybrid aerogel and polyethylene glycol (PEG) as a phase change material (PCM) for EM and IR bi-stealth applications. The composite films were successfully fabricated by constructing a series of PI-based hybrid aerogels containing different contents of graphene nanosheets and Fe<sub>3</sub>O<sub>4</sub> nanoparticles through prepolymerizaton, film casting, freeze-drying, and thermal imidization, followed by loading molten PEG through vacuum impregnation. The construction of PI/graphene/Fe<sub>3</sub>O<sub>4</sub> hybrid aerogel films provides a robust, flexible, and microwave-absorption-functionalized support material for PEG. The resultant multifunctional composite films not only exhibit high microwave absorption effectiveness across a broad frequency range, but also show a good ability to implement thermal management and temperature regulation under a high latent-heat capacity of over 158 J/g. Most of all, the multifunctional composite films present a wideband absorption capability at 7.0–16.5 GHz and a minimum reflection loss of −38.5 dB. This results in excellent EM and IR bi-stealth performance through the effective wideband microwave absorption of graphene/Fe<sub>3</sub>O<sub>4</sub> component and the thermal buffer of PEG. This study offers a new strategy for the design and development of high-performance and lightweight EM–IR bi-stealth materials to meet the requirement of stealth and camouflage applications in military equipment and defense engineering. |
| first_indexed | 2024-03-10T05:13:23Z |
| format | Article |
| id | doaj.art-eceba9acf1554d71b6c5c6b7ade8dcef |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T05:13:23Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-eceba9acf1554d71b6c5c6b7ade8dcef2023-11-23T00:42:13ZengMDPI AGNanomaterials2079-49912021-11-011111303810.3390/nano11113038Configuration of Multifunctional Polyimide/Graphene/Fe<sub>3</sub>O<sub>4</sub> Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-StealthTao Shi0Zhiheng Zheng1Huan Liu2Dezhen Wu3Xiaodong Wang4State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, ChinaState Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, ChinaState Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, ChinaState Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, ChinaState Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, ChinaElectromagnetic (EM) and infrared (IR) stealth play an important role in the development of military technology and the defense industry. This study focused on developing a new type of multifunctional composite film based on polyimide (PI)/graphene/Fe<sub>3</sub>O<sub>4</sub> hybrid aerogel and polyethylene glycol (PEG) as a phase change material (PCM) for EM and IR bi-stealth applications. The composite films were successfully fabricated by constructing a series of PI-based hybrid aerogels containing different contents of graphene nanosheets and Fe<sub>3</sub>O<sub>4</sub> nanoparticles through prepolymerizaton, film casting, freeze-drying, and thermal imidization, followed by loading molten PEG through vacuum impregnation. The construction of PI/graphene/Fe<sub>3</sub>O<sub>4</sub> hybrid aerogel films provides a robust, flexible, and microwave-absorption-functionalized support material for PEG. The resultant multifunctional composite films not only exhibit high microwave absorption effectiveness across a broad frequency range, but also show a good ability to implement thermal management and temperature regulation under a high latent-heat capacity of over 158 J/g. Most of all, the multifunctional composite films present a wideband absorption capability at 7.0–16.5 GHz and a minimum reflection loss of −38.5 dB. This results in excellent EM and IR bi-stealth performance through the effective wideband microwave absorption of graphene/Fe<sub>3</sub>O<sub>4</sub> component and the thermal buffer of PEG. This study offers a new strategy for the design and development of high-performance and lightweight EM–IR bi-stealth materials to meet the requirement of stealth and camouflage applications in military equipment and defense engineering.https://www.mdpi.com/2079-4991/11/11/3038electromagnetic and infrared bi-stealthphase change materialpolyimide-based aerogelsgraphene/Fe<sub>3</sub>O<sub>4</sub> hybridthermal regulationmicrowave absorption |
| spellingShingle | Tao Shi Zhiheng Zheng Huan Liu Dezhen Wu Xiaodong Wang Configuration of Multifunctional Polyimide/Graphene/Fe<sub>3</sub>O<sub>4</sub> Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-Stealth Nanomaterials electromagnetic and infrared bi-stealth phase change material polyimide-based aerogels graphene/Fe<sub>3</sub>O<sub>4</sub> hybrid thermal regulation microwave absorption |
| title | Configuration of Multifunctional Polyimide/Graphene/Fe<sub>3</sub>O<sub>4</sub> Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-Stealth |
| title_full | Configuration of Multifunctional Polyimide/Graphene/Fe<sub>3</sub>O<sub>4</sub> Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-Stealth |
| title_fullStr | Configuration of Multifunctional Polyimide/Graphene/Fe<sub>3</sub>O<sub>4</sub> Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-Stealth |
| title_full_unstemmed | Configuration of Multifunctional Polyimide/Graphene/Fe<sub>3</sub>O<sub>4</sub> Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-Stealth |
| title_short | Configuration of Multifunctional Polyimide/Graphene/Fe<sub>3</sub>O<sub>4</sub> Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-Stealth |
| title_sort | configuration of multifunctional polyimide graphene fe sub 3 sub o sub 4 sub hybrid aerogel based phase change composite films for electromagnetic and infrared bi stealth |
| topic | electromagnetic and infrared bi-stealth phase change material polyimide-based aerogels graphene/Fe<sub>3</sub>O<sub>4</sub> hybrid thermal regulation microwave absorption |
| url | https://www.mdpi.com/2079-4991/11/11/3038 |
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