典型文献
Superinsulating BNNS/PVA Composite Aerogels with High Solar Reflectance for Energy?Efficient Buildings
文献摘要：
With the mandate of worldwide carbon neutralization, pursuing com?fortable living environment while consuming less energy is an enticing and una?voidable choice. Novel composite aerogels with super thermal insulation and high sunlight reflection are developed for energy-efficient buildings. A solvent-assisted freeze-casting strategy is used to produce boron nitride nanosheet/polyvinyl alcohol (BNNS/PVA) composite aerogels with a tailored alignment channel structure. The effects of acetone and BNNS fillers on microstructures and multifunctional proper?ties of aerogels are investigated. The acetone in the PVA suspension enlarges the cell walls to suppress the shrinkage, giving rise to a lower density and a higher porosity, accompanied with much diminished heat conduction throughout the whole product. The addition of BNNS fillers creates whiskers in place of disconnected transverse ligaments between adjacent cell walls, further ameliorating the thermal insulation transverse to the cell wall direction. The resultant BNNS/PVA aerogel delivers an ultralow thermal conductivity of 23.5 mW -m?1 -K?1 in the transverse direction. The superinsulating aerogel presents both an infrared stealthy capability and a high solar reflectance of 93.8％ over the whole sunlight wave?length, far outperforming commercial expanded polystyrene foams with reflective coatings. The anisotropic BNNS/PVA composite aerogel presents great potential for application in energy-saving buildings.
文献关键词：
中图分类号：
作者姓名：
Jie Yang;Kit?Ying Chan;Harun Venkatesan;Eunyoung Kim;Miracle Hope Adegun;Jeng?Hun Lee;Xi Shen;Jang-Kyo Kim
作者机构：
Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong,People's Republic of China;Department of Aeronautical and Aviation Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,People's Republic of China
文献出处：
引用格式：
[1]Jie Yang;Kit?Ying Chan;Harun Venkatesan;Eunyoung Kim;Miracle Hope Adegun;Jeng?Hun Lee;Xi Shen;Jang-Kyo Kim-.Superinsulating BNNS/PVA Composite Aerogels with High Solar Reflectance for Energy?Efficient Buildings)[J].纳微快报（英文）,2022(03):292-307
A类：
Superinsulating,fortable,una,voidable,superinsulating
B类：
BNNS,PVA,Composite,Aerogels,High,Solar,Reflectance,Energy,Efficient,Buildings,With,mandate,worldwide,carbon,neutralization,pursuing,living,environment,while,consuming,less,energy,enticing,choice,Novel,composite,aerogels,thermal,insulation,sunlight,reflection,developed,efficient,buildings,solvent,assisted,freeze,casting,strategy,used,produce,boron,nitride,nanosheet,polyvinyl,alcohol,tailored,alignment,channel,effects,acetone,fillers,microstructures,multifunctional,proper,ties,investigated,suspension,enlarges,cell,walls,suppress,shrinkage,giving,rise,lower,density,higher,porosity,accompanied,much,diminished,heat,conduction,throughout,whole,product,addition,creates,whiskers,place,disconnected,transverse,ligaments,between,adjacent,further,ameliorating,direction,resultant,delivers,ultralow,conductivity,mW,presents,both,infrared,stealthy,capability,solar,reflectance,over,wave,length,far,outperforming,commercial,expanded,polystyrene,foams,reflective,coatings,anisotropic,great,potential,application,saving
AB值：
0.623836
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