麥芽糖基-α-環(huán)糊精的合成與性質(zhì)研究.pdf

1、江南大學碩士學位論文麥芽糖基α環(huán)糊精的合成與性質(zhì)研究姓名：張永偉申請學位級別：碩士專業(yè)：糧食、油脂及植物蛋白指導教師：金征宇20091201AbstractAbstractacyclodextrin(acyclodextrin)hasamediumintramolecularcavityofacylindricalshapeIthasbeenusedascomplexingagentsforthestabilizationofoilyu

2、nstablesubstancesMaltosyl0【一cyclodextrinshavebetterwatersolubilityandcanbemoresafelyandwidelyusedinthefoodindustryThesynthesis、purificationandthermalstabilityofmaltosyl—a—cyclodextrinwasstudiedinthispaperInthisstudythemo

3、nofactorialtestsandresponsesurfacemethodwereperformedtooptimizethepreparationprocessofmaltosyl一0【一cyclodextrinThefollowingoptimalparameterswereobtained：reactiontimeof24h，reactiontemperatureof573℃molarratioofmaltoseto僅cyc

4、lodextrinwas17：1440U／g0【一cyclodextrinQualitativeanalysisofthereactionproductsWasinvestigatedbythinlayerchromatographyelectronsprayionization—massspectrometryandinfraredspectrometryResultsofelectronsprayionization—massspe

5、ctrumindicatedthatmaltosyl—u。cyclodextrinwasthemajoritycomponentsResultsofqualitativeanalysisindicatedthatmaltosyl一0【一cyclodextrinWassynthesizedandenzymaticsynthesisofmaltosyl一0【cyclodextrinwasrelativelyaspecificreaction

6、withlimitedquantityofbyproductsformedTheremovalofmaltosebyActiveCarbonChromatographyWasstudiedMaltoseWaseliminated15％一30％一45％ethanolgradselutionMaltosewentdownto18％with45％ethanolelutionSephadexG一15silicacolumnwasusedtopm

7、fymaltosyl0【一cyclodextrinandthepuritycanbe97％Thethermalstabilityofpreparedmaltosyl一0【cyclodextrinweredetermined，andthedecompositiontemperatureofmaltosyl—Q—cyclodextrinwasbetween300and400。CthepeakvalueWasabout320℃Thermals

8、tabilityofmaltosyl0【cyclodextrinwasbetterthanacyclodextrin，andtheirdecopositiontemperatureenhancedabout4“CThethermaldecompositionkineticsWasinvestigated，theactivationenergyEA=17195kJ／mol，andthepreexponentialfactorkois219

9、10Omin～Theinclusioncompoundofmethylredwithmaltosyl0c—cyclodextrinwasprepared，anditsstrucralcharacterizationWasstudiedbyUVandIRPhasesolubilitydiagrammethoddemonstratedthemolecularratioofmethylredtomaltosyl一0【cyclodextrini