无机合成化学作业.doc

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1、无机合成化学作业(2)付悦玮化新110141107261Title:WaterVaporTransferPropertythroughFiberAssemblieswithCompressionJournal:ProceedingsofTextileBioengineeringandInformaticsSymposium2010Pages:1007-1011Abstract:Watervaportransferpropertyoffiberassemblieswasstudiedusinganewlydevelopedtestingapparatus.Anairpumpand

2、waterbottleisusedasthewatervaporsourcefortheupperchamber.Watervaporpenetratesthroughthesamplechambertothelowerchamber.MassDiffusionconstantisgotbycomparingthetheoreticalandexperimentalmoistureconcentrationofthelowerchamber.Themethodisprovedtobeefficient.Weusedthetestertostudytheinfluenceoffi

3、berassemblydensityontheproperty,owingtocompression.Furthermoretheinfluenceoffiberarrangementwasdiscussedaswell.Thestudyprovidesawaytoselecttheoptimumstructureoffiberassemblieswiththebestwatervaportransferability.Experienment:Themeasuringdevice,consistedofanaquariumairpumpwhichwasblowingtowar

4、dstheliquidinthewatervesselwithacertainvelocitysothatwaterevaporatedproducingwatervaporandwassuppliedtotheuppermeasuringchamberthroughapipe6.Theupperchamberisopentotheatmosphere,sothepressureofitiskeptcoefficientduringthetestingprocess.Watervaporpenetratedthefibermassinfibermasschamber2.Twom

5、oisturesensorswereseparatelyplacedatthebottomoftheupperchamberandthetopofthelowerchamber.Thesignalsgeneratedfromhumiditysensorswerefedintoarecorderwheretheywereprocessedandtime-humiditycurvesweregenerated.Thefiberassembliesinthechamberwerecompressedfrom0.0071g/cm3to0.035g/cm3.Afterbeingteste

6、d,thematerialwasputoutofthechamberandthenewmaterialofthesamedensitywastestedinsteadandthetestwasrepeatedthreetimesatagivendensity.Theaveragevaluewasused.Testingofalldensitieswasofthesameprocess.Thedevicewashousedinachamberwiththetemperatureof28.0±0.5°Candhumidityof65±5%.Watervapordiffusionre

7、sistanceisalwaysusedtoevaluatewatervaportransferabilityoffiberassemblies.Wecangettheparameterfromthefollowingmodel.AsshowninFigure2,constanthumidityisfixedintheupperchamberandroomhumidityismaintainedinthelowerchamberinitially.Moisturetransferredfor