侧链含胺基的水溶性与两亲性阳离子聚电解质的合成及性质研究

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1、山东大学博十学位论文saltandstyrene(PVBAHSn-b-PSm)weresynthesized．Westudiedfourspecifichomologousseries(blockl，2，3，4)惭thm=64，99，132，525respectivelyandn=59．Bymeasuringthe乃4isothermsforliquidexpandedmonolayersformedatair／waterinterface,differencesofthecopolymersinmolecularareawereofobviousrelevance,wherethe

2、largestPSblockoccupiedthelargestinterfacialmolarareathantheothersmallerones．Atthesametime,thisorderlinesswasinvalidforblock1t02．Apossibleexplanationforthisnon-trivialresultWasthatthehydrophilie／hydrophobicbalancefortheseeopolymers、)I，imlowerPSfractionsshiftedtowardsthehydrophilicity．Effectofbov

3、ineserumalbumin(BSA)dissolvedinthesubphaseWasalsodiscussed．SignificantchangesoffilmswereobservedformedbycopolymersandBSA：withlittlecontentsofBSAin吼玎f钿ce'newamphiphilicmoleculeWasformedwithmulti-hydrophobicchainsandlargevolumebetweenPVBAHS—b-PSandBSAbasedonmanytoonebyelectrostaticinteraction．The

4、compressibilityandstabilityofthefilmincreasedrapidly．Duringthecompressionprocess,theresulting州isothermexisted竹theliquid—expandedstate一，¨theliquid-condensedstate—and”theintermediatestate"inturn．Wi也thehighercontentsofBSAinsurface，newamphiphilicmoleculeWasformedbetweenPVBAHS·b-PSandBSAbasedononeto

5、onebydec'trostaficinteraction．MixedfilmWasformedbythenewamphiphilicmoleculesandthesuperfluousBSAmolecules．Thecurvesdemonstratedsmoothmlt'fac圮pressureincreaseandthera#ddecreaseofcollapsepressure(㈦，illustratingtherearrangementandevenextrusionoftheunassociatedBSAmoleculesinthefilm．Thepresenceofmuc

6、hmoreBSAmoleculesinthesubphaseWasnotfavorabletotheformationofcompactac宅mnulatingcompressingfilm．ThedifferentaggregatedstructuresoftheblockcopolymerPVBAHS5小PSmcontainingpendantaminogroupsin1rI{F／H20(v／v=3)wereformed丽mpHchangesduetoelectrostaticinteractioninPVBAHSsegmentswithdifferentprotonizatio

7、ndegrees．Observedbydynamiclightscattering,thethreeblockcopolymcrs,PVBAHS59一知PS骗PVBAHS59-b-PSl32，andPVBAHS59-b-PS525formedcore-shellmicellesinDMSO／THF(w／w=3／2)binarysolventmixture,withPSincorollaandPVBAHSincore．Thecoreofmicelleform