Evaluation of radiation damage behavior in polyimide aerogel by infrared camera and photoacoustic spectroscopy |
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| Institution: | 1. State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, PR China;2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, PR China;1. Shandong Provincial Key Laboratory of Special Silicone-Containing Materials, Advanced Materials Institute, QiLu University of Technology (Shandong Academy of Sciences), Jinan 250014, PR China;2. State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, PR China;1. Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsan-no, Seodaemun-gu, Seoul 120-749, South Korea;2. Production & Engineering Division, Hankook Tire, Keumsan, Chungnam 312-820, South Korea;1. Institute of Intelligent Manufacturing Technology, Shenzhen Polytechnic, Shenzhen, China;2. Institute of Engineering Mechanics, Beijing Jiaotong University, 100044, Beijing, China;3. Beijing Institute of Spacecraft System Engineering, Beijing, 100094, China;4. Institute of Theoretical and Applied Aerodynamics, China Academy of Aerospace Aerodynamics, Beijing, China |
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| Abstract: | In this work, the optical absorption and thermal properties of polyimide aerogel have been investigated by Infrared Camera, ultraviolet–visible and photoacoustic spectroscopy under low energy proton irradiation. The characterization method of the infrared camera can obtain the optical absorption ratio, and meanwhile get the information of specific heat capacity. Moreover, it can acquire the nature information of damaged area rather than the overall performance. The results show an increase in optical absorption after proton irradiation, which is in good coincidence with Ultraviolet–visible spectroscopy analysis. And the specific heat capacity decreased linearly with proton fluences, which can be attributed to the irradiation damage and carbonization in polyimide aerogel. The Raman spectra suggested the cleavage of chemical bonds and carbonization in polyimide aerogel. This work provides the novel, non-destructive and sensitive methods to characterize irradiation damage of aerogel. |
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| Keywords: | Polyimide aerogel Irradiation damage Photoacoustic spectroscopy Infrared camera Specific heat capacity |
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