殼聚糖及乙丙橡膠膜的輻射改性研究.pdf

1、中國科學技術大學博士學位論文殼聚糖及乙丙橡膠膜的輻射改性研究姓名：李夜平申請學位級別：博士專業(yè)：高分子化學與物理指導教師：方月娥2002.12.1中嗣科學技術大學博士學位論文摘要ABSTRACTInthisdissemtion，na“嘲1p01ymerchitosaIlwasmodi矗edby60Co丫rayirradiationandplasmatechIliqueApan舶mtllese，syIlthcticpolymeretlly

2、lenepropylenerubber(EPR)membranewaSalsomodi丘edbyirradiationteclllliqueThefeaSibilityabouttllemodifiedEPRmembranesusedaSartificialkidneysemipemeablemembraIlehasbeenstudiedThemaincomentsarelistedasf01lows：23The1r—rayirradi

3、ationdegmdationofchitosanwassystematicallystudiedinsolidstatc，inswellingstate，aJldinaceticacidaqueoussolutionTheapparentactjVationenergy(E)，meaVefagecolIjsion矗equencyfactor(A)andIheGva】uesofchainscissionwereobtainedasfol

4、lows：insolidstateE=258kJ／Inol，A=70l10寸kGy1，G(20℃)=273；inswellingstaIe，E=203kJ／mol，A=29310‘5kGy一，G(19℃)=143；insolution，E=330kJ／m01，A=25210‘5kGy～，G(21℃)=736ItwaSthefirstreportaboutthepreparationoflowmoleculec11itosaIlby丫ra

5、yimdiationdegradationofswellingchitosan，whichgreatlyimproved也edeFadationefficiencyThehydrogelofchitosallp01y(sodi啪acrylate)wassynmesizedbyT—myirradiationtechniqueTheinnuencesofvariousfactorsonwateruptakehavebeenstudied，i

6、ncluding廿1emassratioofreactants，irradiationdose，doserateaIldtheconcentrationofN，N’一Methylenebisacryl踟ideetcThehydrogelwasofsensitiVitytothechangeofpHandionicstrengthThefjeezjng、vaterponionbecamemorea11dmorepredominantasw

7、ateruptakeofthehydrogeIgraduallyincreasedChitosanmembranesweregr世edw油hydroXyethylmethacrylate(HEMA)by丫rayirradiationtechIliqueTheinnuencesofseVeralfactorsonthedegree0fgraftinghavebeenstudiedThephysicochemicalpmpertiesofg

8、raftedmembraneswereinvestigatedTheworkestablishedmerelationshipofmei11itial釅堿ngrate(dG“t)withvariouse腩ctfactors：ln(dG0／dt)292l—1495廠r1091n【M】o058lnDThe印paremactivationenergy(E)and也eavemgecollision舶quencyfactor(A)ofme黟aft

9、ingcopolymerizationWere1243kJ，moland9955G％h042kGy。o58mol‘109L109Thepe蛐eabmtyofmemb鯽estourea，crcatinealldcreatininewasinveStigatedInaddition，EPRmembraIlesweregra船dwithHEMAby1r—rayirradiationtechIIiqueThefeasibilityabouttl