表面技术2017，Vol.46Issue(4)：197-204,8.DOI:10.16490/j.cnki.issn.1001-3660.2017.04.032
SiO2气凝胶绝热涂层隔热与耐高温性能研究
Thermal Insulation Performance and Heat Resistance of SiO2 Aerogel Coating
摘要
Abstract
The work aims to explore application of SiO2 aerogel in thermal-insulating coating, and improve thermal insula-tion performance and heat resistance by taking advantage of its low thermal conductivity, low density, high porosity and low re-fractive index. Resin of lower heat absorptivity and filler of excellent thermal insulation performance were selected as raw mate-rials of thermal-insulating coating by screening different types of water-base resin and functional filler. Thermal insulation per-formance of thermal-insulating coatings with different mass fractions of SiO2 aerogel was studied with homemade thermal insu-lation device and thermal conductivity measuring instrument. Phase structure and group change of the coatings heated to 200, 300 and 400℃ were studied in FT-IR and XRD methods. Water-based acrylic resin contained less endothermic groups, and its equilibrium temperature was 0.8℃ and 1.8℃ lower than that of polyurethane resin and epoxy resin respectively in same illu-mination conditions. It was more suitable to be used as film-forming materials of SiO2 aerogel heat insulation coating. As mass fraction SiO2 aerogel increased, heat insulation performance first improved and then reduced. The heat insulation performance was the best when the SiO2 aerogel mass fraction was 5%, insulating performance and temperature might reduce by 12℃. Meanwhile, the heat insulation performance improved as the SiO2 aerogel increased. When the mass fraction of SiO2 aerogel was 7%, the coating could maintain good properties at 400℃ . SiO2 aerogel can improve the heat insulation performance and heat resistance of thermal-insulating coating significantly, laying the foundation of its multidisciplinary application.关键词
SiO2气凝胶/绝热涂层/导热系数/耐高温/性能Key words
SiO2 aerogel/thermal-insulating coating/thermal conductivity/heat-resistant/performance分类
矿业与冶金引用本文复制引用
丁逸栋,刘朝辉,王飞,杨宏波,舒心..SiO2气凝胶绝热涂层隔热与耐高温性能研究[J].表面技术,2017,46(4):197-204,8.基金项目
全军后勤科研计划项目(BY115C007) （BY115C007）
重庆市自然科学基金(cstc2014jcyjA50026) Supported by Logistical Scientific Research Projects of Army (BY115C007), National Natural Science Foundation of Chongqing (cstc2014jcyjA50026) （cstc2014jcyjA50026）
