冷冻干燥法制气凝胶

AdvancedMaterialsPreparedbyFreeze dryingtechnique UniversityofScienceandTechnologyofChina Contents Whatisthelightestmaterialintheworld HaiyanS ZhenX ChaoG AdvancedMaterials 2013 25 2554 2560 Multifunctional Ultra Flyweight SynergisticallyAssembledCarbonAerogels CNTsaqueousdispersion1 0mg ml 28ml GGOaqueousdispersion1 0mg ml 28ml Mixing Stiringfor1 5h HaiyanS ZhenX ChaoG AdvancedMaterials 2013 25 2554 2560 mixture mold freeze dryingfor2d chemicallyreducedbyN2H4vaporat90 for24h vacuum dryingat160 for24h HaiyanS ZhenX ChaoG AdvancedMaterials 2013 25 2554 2560 HaiyanS ZhenX ChaoG AdvancedMaterials 2013 25 2554 2560 d c e f HaiyanS ZhenX ChaoG AdvancedMaterials 2013 25 2554 2560 冷冻干燥 Freeze drying 又称真空冷冻干燥 冻结干燥 冻干 FD 1811年诞生 用于生物体脱水1890年医学上的首次应用 冻干了一批生物器官1932年引入真空设备 在生物制品 药剂以及食品领域迅猛发展1935年干燥的过程采用主动加热 开始应用到工业生产1965年首先采用冻干技术制备出金属超细粉末如今在超导材料 超细金属粉末 精细陶瓷 催化剂 高能电池以及薄膜材料等领域都得到了广泛的应用 孙启达 冷冻干燥超细粉体技术及应用 M 化学工业出版社 2006 HistoryofFreeze drying Phasediagramofsalt watersystem Highlyelasticgrapheneoxide epoxycompositeaerogelsviasimplefreeze dryingandsubsequentroutinecuring ShibingYeetal J Mater Chem A 2013 1 3495 3502 SEMimagesof aandb GOAand candd GEA 9 MultifunctionalGraphene Platinum Nafion 全氟磺酸 Hybrids LuisEstevezetal J Am Chem Soc 2011 133 6122 6125 MultifunctionalGraphene Platinum NafionHybridsviaIceTemplating JustinE Silpe etal Langmulr 2013 29 8782 8787 Freeze drying AntibubblesfabricatedbyFreeze dryingmethod Freeze dryingsynthesisofLi3V2 PO4 3 Ccathodematerial Theas preparedmaterialshowsauniformparticlesizedistributionandtheparticlesizeismuchsmallerthan300nm thecompositedeliveredareversiblecapacityof125 2mAhg 1withoutobviouslyfadingafter100cycles QiaoYQ WangXL MaiYJ etal JournalofAlloysandCompounds 2012 536 132 137 徐如人 庞文琴 霍启升 无机合成与制备化学 M 高等教育出版社 2009 Prepareultra finepowder Adavantages Canbeobtainedinahomogeneousmixtureofthecomponentsinsolution suitableforaddingtracecomponents synthesizecomplexfunctionalceramicmaterialsnanoparticles Sizeofnanoparticlesrangefrom1nmto50nm Easytooperateandgoodinthepreparationofhighpurityceramicmaterial Disadvantages Efficiencyisrelativelylow corrosivegasimpactthelifeoftheequipment TheprincipleofFreeze dryingtechniqueSynthesisofAdvancedMaterialsbyFreeze dryingtechniquehasmanyAdvantages template freesimpleretaintheoriginalstructurescalablefabricationEnlightenment newwineinanoldbottle newconceptsinanoldframework 孙启达 冷冻干燥超细粉体技术及应用 M 化学工业出版社 2006徐如人 庞文琴 霍启升 无机合成与制备化学 M 高等教育出版社 2009 HanY XuZ GaoC Ultrathingraphenenanofiltrationmembraneforwaterpurification J AdvancedFunctionalMaterials 2013 EstevezL KelarakisA GongQ etal Multifunctionalgraphene platinum nafionhybridsviaicetemplating J JournaloftheAmericanChemicalSociety 2011 133 16 6122 6125 MecklenburgM SchuchardtA MishraYK etal Aerographite UltraLightweight FlexibleNanowall CarbonMicrotubeMaterialwithOutstandingMechanicalPerformance J AdvancedMaterials 2012 24 26 3486 3490 SchaedlerTA Jaco