物理化学学报Issue(6)：1179-1185,7.DOI:10.3866/PKU.WHXB201504146
化学改性氧化石墨烯交联的聚酰亚胺气凝胶
Polyimide Aerogels Crosslinked with Chemically Modified Graphene Oxide
摘要
Abstract
Polyimide (PI) aerogels, which are general y crosslinked using expensive chemical crosslinking agents, are novel porous materials with high strength, high heat resistance, high porosity, and low density. Graphene oxide (GO) is a functional nanofil er that has aroused wide interest in recent years. The reported PI/GO composites have mostly been in the form of fibers and films. In this study, PI/GO composite aerogels were obtained using chemical y modified graphene oxide (m-GO) as the crosslinking agent, instead of traditional ones such as 1,3,5-triaminophenoxybenzene (TAB), by reaction with 4,4′-oxydianiline (ODA) and 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA). The chemical modification of GO was achieved by reacting GO with excess ODA using a hydrothermal method. The microstructures of the PI/m-GO aerogels were investigated using scanning electron microscopy (SEM). Nitrogen sorption tests, thermogravimetric analysis, and a hot-wire method were used to investigate the effects of m-GO on the pore properties, thermal stabilities, and thermal conductivities, respectively, of the resulting aerogels. The results show that the PI/m-GO aerogels are highly porous, thermal y stable, and heat insulating. Compression tests showed that the PI aerogel prepared using 0.6%(mass fraction, w) m-GO instead of 1.8%(w) TAB as the crosslinking agent had a higher specific Young′s modulus [Young′s modulus/density (ρ)] and specific yield strength (yield strength/ρ), and less shrinkage.关键词
聚酰亚胺气凝胶/氧化石墨烯/交联/机械性能/收缩率Key words
Polyimide aerogel/Graphene oxide/Crosslinking/Mechanical property/Shrinkage ratio分类
化学化工引用本文复制引用
梁祎,卢赟,姚维尚,张学同..化学改性氧化石墨烯交联的聚酰亚胺气凝胶[J].物理化学学报,2015,(6):1179-1185,7.基金项目
The project was supported by the National Natural Science Foundation of China (21373024) and Innovation Program of the Beijing Institute of Technology, China.国家自然科学基金(21373024)和北京理工大学创新项目基金资助 （21373024）
