纖維素衍生物-殼聚糖（或聚丙烯酸）復(fù)合物研究及醫(yī)學(xué)應(yīng)用探索.pdf

1、上海大學(xué)碩士學(xué)位論文纖維素衍生物殼聚糖（或聚丙烯酸）復(fù)合物研究及醫(yī)學(xué)應(yīng)用探索姓名：羅坤申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：高分子化學(xué)與物理指導(dǎo)教師：尹靜波20060201上海大學(xué)碩士學(xué)位論文AbstractThecomlexationofpolymers，whichresultsinpreparationofnewmaterialswithimprovedphysicochemicalandmechanicalproperties，hasrecei

2、vedconsiderableattentionofresearchersinthepastseveraldecadesThefinalpropertiesoftheblendsaredeterminedbythemiscibilityofthepolymers，whichisgreatlyfavoredbyfonnationofintermolecularhydrogenbondsbetweenthecomponentpolymers

3、Watersolublepoly(acrylicacid)(PAA)andseveralpolysaccha“deswerechosentoforminterpolymercomplexesorblendsinthispaper，namely，chitosan(cs)，hydroxypropylmethylcellulose(HPMC)，nlethylcelIuIose(MC)andhydroxyethylcelluloserHEC)T

4、heblendsofCSandcellulosederivativesurerestudiedbyIR，WAXDTGASEMandmechanicaltestItwasshownthattheblendsarenotfullymiscibleinadrystatedespitetheweakhydrogenbondingbetweenthepolymerfunctionalgroupsBesideswealsofoundthatHECh

5、asbettermiscibilitywithCScomparedtoHPMCandMC，foritshighermolecularweightandmoresuitablestructure，ItseemedthatcomplexationbetweenPAAandHPMCcannottakeplaceinorganicsolventsbutwater，Theturbidimetricmeasurementsshowedthatthe

6、increaseofthepolymerconcentrationsshiftsthecriticalpHvaluesofthesolutionturbiditytothehigherregionTheaveragesizeofparticlesrangedfewwhenthesolutionturbidityincreased、becausethenumberofparticleswasamoreimportantfactorwhic

7、hgovernedthegroachofsolutionturbidit)，thanthesizeThroughthemeasurementofitsswellingratioandsolubilitywefoundthegel—likeinterpol3‘metcomplexwiththermaltreatmentcoulds、、7ellinwaterandpresentedpH—sensitix‘etotheexternalmedi