磁性介質(zhì)的研制及磁分離過程理論研究.pdf

1、天津大學(xué)博士學(xué)位論文磁性介質(zhì)的研制及磁分離過程理論研究姓名：薛博申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：生物化工指導(dǎo)教師：孫彥20020401ABSTRACTAmagneticsupportwasproducedbywateroilsuspensioncrosslinkingoraqueousphasecrosslinkingofpoly(vinylalcohol)withthepresenceofmagnetitecolloids.Cibacronb

2、lue3GAwasimmobilizedtothesupportasanaffinityligand.Theadsorptionbehavioroflysozymeandbovineserumalbumintotheaffinitysupportwasstudied.Apoly(glycidylmethacrylatetriallylisocyanuratedivinylbenzene)magneticsupportwassynthes

3、ized勿addingoleicacidstabilizedmagnetitecolloidstothereactionmixture.Thesupportwasderivatizedwithdiethylaminetoobtainamagneticanionexchangerwhichhadastaticcapacityof71.3mgBSAmlwetsupport.TheeffectivediffusivityofBSAinthes

4、upportwas5.0X1013m2s.Theabovementionedmagneticsupportsweremechanicallyandchemicallystableduringrecycling.Theirmagnetizationcurvescouldbewelldescribed飾theLangevinfunctionindicatingthesuperparamagneticnatureofthesesupports

5、.Thesedimentationofpolydisperseagarosebeadswithbroadparticlesizedistributionswasstudiedexperimentallyandtheoretically.Alightextinctionprinciplewasusedtomeasurethesolidconcentrationinthesuspensionatdiferenttimeandsettling

6、distances.TheprocedurewassimulatedwithapolydispersesedimentationmodeldevelopedfromKynchsmonodispersesedimentationtheory.Diferenthinderedsetlingfunctionswereemployedinthemodelandtheirresultswereanalyzedandcompared.Thesett

7、lingofmagnetizablebeadsinmagneticfieldswasstudiedandamagneticsedimentationmodelwasestablishedaccordingly.Theexternalmagneticfieldshortenedthetimeneededforsolidliquidseparationbyprovidingthedrivingforceforparticlemovement