微晶殼聚糖和殼聚糖-PBA復(fù)合膜的制備、結(jié)構(gòu)、性質(zhì)及其在農(nóng)業(yè)上的應(yīng)用研究.pdf

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文微晶殼聚糖和殼聚糖PBA復(fù)合膜的制備、結(jié)構(gòu)、性質(zhì)及其在農(nóng)業(yè)上的應(yīng)用研究姓名：曾坤偉申請學(xué)位級別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)教師：方月娥2001.5.1中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文——————————————_—————————————————————————————————————————————————————————●————————————^————————一AbstractChitinisoneofthe

2、mostabundantpolysaccharidesfoundinnatureItisabiodegradablerenewablebiomassmacromoleculethathassame13一(1—4)一D—glucopyranoseunitsbackboneascelluloseHoweverincontrastwithcellulose，the2一hydroxyiSreplacedbyanacetamidegroupChi

3、tosanistheNdeacetylatedderivativeofchitinandhasbothreactiveaminoandhydroxylgroupsthatcanbeusedforchemicalreactionsBecauseofgoodproperties，chitin／chitosanisoneofresearchingfocuseslChitosanwasdegradedwithdiluteinorganicaci

4、ddirectlyanddegradationreactionishomogeneousreactionAftercompleted，twokindsofwater—solublemicrocrystallinechitosanweredepositedandwashedwithpureethanolandtheirproductyieldswereover95％Thediametersofthemicrocfystallineswer

5、efrom400nmtO800nmandthetypesofthosewerecompletelydifferentfromthatofsolidchitosanpowderTheIRabsorptionpeaksofacetamidegroup(i652，1600cml)disappearedcompletely，andthedissymmetricdistortionvibrationandsymmetricdistortionvi

6、brationpeaksof—NH3appearednear1620，l520cm～Microcrystal／inechitosanpreparedwithhydrochloricacidiSdissolvediDcoldwaterandmicrocrystallinechitosanpreparedwithphosphoricacidisdissolvedinover60。CwLter2Thisworkpresentsastudyof

7、compatibilityandmiscibilityofblendmembranesofchitosanandpoly(butylacrylate)(PBAlwithslightdifferencesintheirchemicalstructuresMechanicalpropertiesofblendmembranesofchitosanandPBAinwetstatewereimprovedcomparedtochitosanTG

8、AthermogramsandSEMofblendmembranesindicatedthattheblendsshowedallintermolecularinteractionandthatchitosanandPBAexhibitedsomelevelofcompatibilityandmiscibilitywitheachother3FeasibilityofchitosanasseedcoatingwasstudiedAffe

9、rlOtSofexperiments，theseedcoatingthatdon’tneeddroppinginwaterwascomposedofblendofchitosanandpoly(vinylalcoh01)(PVA)andtheoptimumproportionofPVA／chitosanis】~2Andtheseedcoatingthatneeddroppinginwaterwascomposedofblendofchi