Electron/Vacuum Ultraviolet Irradiation Effect and Mechanism Analysis of Polyimide Aerogel Materials
SUN Chengyue1, GUO Xinxin2, WU You3, CAO Zhengli4, WANG Hao1, JU Dandan1, WANG Yan5, WU Yiyong1,*
1 Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin 150001, China 2 Guangzhou GRG Metrology & Test Co.,Ltd., Guangzhou 510627, China 3 Xi'an Aerospace Chemical Propulsion Co.,Ltd., Xi'an 710511, China 4 Shanghai Institute of Aerospace System Engineering, Shanghai 201109, China 5 Beijing Institute of Spacecraft System Engineering, Beijing 100094, China
Abstract: The discussion about the scathing behavior and performance degradation law of aerogel porous materials in multifactorial space irradiation environment is integral to tap its potentials in space application, thereupon then to provide a trustworthy theoretical rationale for prediction on orbit application. Herein, the research of electronic and vacuum ultraviolet (VUV) radiation effects and damage mechanism of the material was conducted by comparing the thermal stability and thermal conductivity of as-grown and irradiated polyimide (PI) aerogels, combining with modern material analysis technology. The results showed that ionization damage and degradation of PI aerogel occurred under both 170 keV and 1 MeV electron radiation, along with the reduction content of C-O. Further, 170 keV electron radiation triggered charging-discharging effect, resulting in the damage of the microstructure and reducing its specific surface area by 16.6%. VUV could activate the surface of PI aerogel, and oxygen content increased up to 61.45%, while the content of C=O and C-O increased simultaneously compared with original sample. No significantly change in thermal stability and thermal conductivity of PI aerogel was observed under electron irradiation and VUV irradiation.
作者简介: 孙承月,哈尔滨工业大学空间环境与物质科学研究院副研究员。2005年于辽宁大学物理系本科毕业,2007年于哈尔滨工业大学材料科学与工程学院硕士毕业,2012年于哈尔滨工业大学材料科学与工程学院博士毕业。2012年于哈尔滨工业大学工作至今,目前主要从事材料空间环境效应、空间环境模拟、低维聚合物空间环境效应等方面的研究。发表论文30篇,其中SCI论文29篇。 吴宜勇,哈尔滨工业大学空间环境与物质科学研究院教授、博士研究生导师,哈尔滨工业大学材料科学与工程学院空间环境材料行为及评价技术国家级重点实验室副主任。1989年于哈尔滨工业大学金属材料及工艺系获学士学位,1995年获哈尔滨工业大学材料科学与工程学院博士学位(直博)。1995年到哈尔滨工业大学工作至今,目前主要从事空间太阳电池环境效应与损伤机理、聚合物材料原子氧侵蚀机理及防护、材料辐致电导效应、原子层沉积技术等方面的研究。在Journal of Applied Physics、Solar EnergyMaterials & Solar Cells、Polymer Degradation and Stability、Thin Solid Films等期刊发表学术论文100余篇,获授权专利5项。
引用本文:
孙承月, 郭鑫鑫, 吴忧, 曹争利, 王豪, 琚丹丹, 王岩, 吴宜勇. 聚酰亚胺气凝胶材料的电子/紫外辐照效应及机理分析[J]. 材料导报, 2022, 36(22): 22040378-8.
SUN Chengyue, GUO Xinxin, WU You, CAO Zhengli, WANG Hao, JU Dandan, WANG Yan, WU Yiyong. Electron/Vacuum Ultraviolet Irradiation Effect and Mechanism Analysis of Polyimide Aerogel Materials. Materials Reports, 2022, 36(22): 22040378-8.
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2022, Vol. 36 
