宇航材料工艺2024，Vol.54Issue(6)：52-58,7.DOI:10.12044/j.issn.1007-2330.2024.06.007
原料配比对酚醛气凝胶结构和性能的影响
Effects of Material Composition on Structure and Properties of Phenolic Aerogel
摘要
Abstract
A simple one-pot method for preparing phenolic aerogel(PA)was proposed.Resorcinol and formaldehyde were mixed and added to an alkaline solution,with cetyltrimethylammonium chloride included as a surfactant.PA was prepared by sol-gel and high-temperature aging reactions.The effects of phenolic precursor ratio and pH on the structure and properties of aerogels were investigated.The results show that as formaldehyde content increases,the shrinkage rate of PA decreased,while the density and thermal conductivity increases.When the ratio of phenol to formaldehyde is 1∶4,the aerogel has a typical three-dimensional network structure,with the lowest density of 0.32 g/cm3,good thermal insulation and thermal conductivity of 0.0318 W/(m·K),and the average particle size of PA was 1.059 μm.The higher the pH of the alkaline solution is,the more methylene and methylene ether bonds are,the larger the gel particle size is,and the closer the neck connection is.The PA prepared with ammonia as a catalyst has the smallest shrinkage,the lowest density,and the better thermal insulation performance and thermal stability.关键词
酚醛气凝胶/隔热性能/低密度Key words
Phenolic aerogel/Thermal insulation/Low density分类
化学化工引用本文复制引用
郑振荣,吕红丽,罗丽娟,李红晨,郑柳春..原料配比对酚醛气凝胶结构和性能的影响[J].宇航材料工艺,2024,54(6):52-58,7.基金项目
国家自然科学基金((52003071) （(52003071）
