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ID:34552141
大小:16.04 MB
页数:152页
时间:2019-03-07
《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》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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
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