图1-1.超临界流体的压力–温度相图 　　Fig.1-1.Schematicpressure-temperaturephasediagramforapurecomponentshowingthesupercriticalfluid(SCF)region.Thetriplepoint(T)andcriticalpoint(C)aremarked.Thebluecirclesrepresentthevariationindensityofthesubstanceinthedifferentregionsofthephasediagram.Notethatthedensityvariescontinuouslybetweentheliquidstateandthegasstate,providingthattheliquid-gasequilibriumline(T-C)isnotcrossed.[15] 　　图1-2.超临界二氧化碳物理（密度和传输）性质的可调节性 　　Fig.1-2.Pressure-tunabilityofdensityandtransportpropertiesofsupercriticalfluidsinthenear-criticalregion.[16] 　　---------------------------- 　　[15]CooperA.I.Polymersynthesisandprocessingusingsupercriticalcarbondioxide[J].J.Mater.Chem.,2000,10:207-234.[16]SubramaniamB.Enhancingthestabilityofporouscatalystswithsupercriticalreactionmedia[J].AppliedCatalysisA:General,2001,212:199-213.