Synthesis and Thermal Insulation Performance of Silica Aerogel from Recycled Coal Gangue by Means of Ambient Pressure Drying-中国期刊网

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.

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Synthesis and Thermal Insulation Performance of Silica Aerogel from Recycled Coal Gangue by Means of Ambient Pressure Drying

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Synthesis and Thermal Insulation Performance of Silica Aerogel from Recycled Coal Gangue by Means of Ambient Pressure Drying

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