Graphene oxide as an anti-shrinkage additive for the preparation of resorcinol-formaldehyde composite aerogels
In order to strengthen the nanostructure and suppress the collapse of nanopores of resorcinol-formaldehyde (RF) aero-gels,graphene oxide (GO) was incorporated into RF matrix to obtain GO/RF composite aerogels by sol-gel polymerization.The influence of GO content on the structure and physical properties of RF aerogels were investigated.The morphologies of composite aerogels were characterized by scanning electron microscopy,indicating good dispersion of graphene oxide in the RF matrix.In ad-dition,GO could obviously reduce both the drying shrinkage and density of aerogels.It was found that,as the content of GO in-creased from 0 to 2 wt% in the composite aerogels,the linear shrinkage decreased progressively from 28.3% t0 2.0 %,and simul-taneously,the density decreased from 506 t0 195 kg · m-3,implying that GO is a suitable additive for inhibiting the volume shrink-age of aerogels in drying.
resorcinol-formaldehyde aerogels graphene oxide additive dispersion shrinkage
GUO Kang SONG Huai-he CHEN Xiao-hong
State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China
国内会议
太原
英文
449-452
2013-08-16（万方平台首次上网日期，不代表论文的发表时间）