【摘 要】
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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
【机 构】
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State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beij
论文部分内容阅读
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.
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