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湿热、盐雾和霉菌对氧化铝纳米隔热材料的性能影响
王晓艳, 胡子君, 孙陈诚, 王晓婷, 宋兆旭
航天材料及工艺研究所, 先进功能复合材料技术重点实验室, 北京 100076
摘要:
以氧化铝纳米隔热材料为研究对象,开展了湿热、盐雾和霉菌对材料的性能影响研究。结果表明:湿热环境下,密度为0.45 g/cm3的材料室温下热导率由0.031 W/(m·K)增加到0.047 W/(m·K);盐雾环境下,热导率由0.031 W/(m·K)显著增加到0.136 W/(m·K);霉菌环境下,热导率基本保持不变为0.031 W/(m·K)。分析了材料表面与上述环境的相互作用,发展了材料表面防潮技术。经防潮后的氧化铝纳米隔热材料疏水性显著提高,接触角均超过90°。再经贮存环境试验考核,发现材料基本不受湿热、盐雾和霉菌的影响。
关键词:  湿热  盐雾  霉菌  热导率  防潮  纳米隔热材料
DOI:10.12044/j.issn.1007-2330.2018.02.013
分类号:TB332
基金项目:
Effects of Moist Heat Environment, Salt Spray and Mycete on Nano Al2O3 Thermal Insulating Materials
WANG Xiaoyan, HU Zijun, SUN Chencheng, WANG Xiaoting, SONG Zhaoxu
Science and Technology on Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076
Abstract:
The effects of moist heat environment, salt spray and mycete on nano Al2O3 thermal insulating materials were studied. The results showed that the thermal conductivity of materials with density of 0.45g/cm3 increased from 0.031 W/(m·K) to 0.047 W/(m·K) at 25℃ after moist heat test. The thermal conductivity of materials rapidly increased from 0.031 W/(m·K) to 0.136 W/(m·K) after salt spray test. The thermal conductivity of materials was kept constant after mycete test. The interaction between the material surface and the test environments was analyzed, and the technology of surface moisture resistence was developed at the material surface. After moisture resistence treatment, the hydrophobicity of the nano-alumina insulating material was significantly increased, the contact angle was more than 90°, and the properties of materials were not affected by moist heat environment, salt spray and mycete.
Key words:  Moist heat  Salt spray  Mycete  Thermal conductivity  Moisture resistant  Nano insulating material