摘要
Silicaaerogelmaterialsarewellrecognizedfortheirsuperinsulationperformanceandareregardedasoneofthehotcandidatestorevolutionizebuildinginsulation.Todate,highproductioncostrelatedtoexorbitantprecursorsaswellascumbrousmulti-stephydrophobizationprocesshasoftennarrowedthefieldofapplications.Inthiswork,granularsilicaaerogelmaterialsweresynthesizedbyextractingSiO2fromrecycledrichsiliconcoalgangue,followedbyone-stephydrophobizationandambientpressuredrying.Lightweight(about0.16g/cm3)andnanostructuralaerogelswereobtainedthroughthisroute.Theyexhibita3Dopenporousmicrostructurewitharound600cm2/gsurfaceareaand20nmoftheaverageporediameter,thermalconductivityof4-5mmpackedgranulesis20-25mW/(m·K),whichwasprovedbybothguardedhotplateandhot-wiretransientmethods.Thisstudyoffersanewfacilerouteforthesynthesisofsilicaaerogelfromrecycledsolidwastecoalgangueandsuggestsamethod,whichmayleadtoacostreductionintermsofindustrialproduction.
出版日期
2015年05月15日(中国期刊网平台首次上网日期,不代表论文的发表时间)