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CHIVRAC-F-2016-BIOMACROMOLECULES-V9-P896

CHIVRAC-F-2016-CARBOHYD-POLYM-V79-P941

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本文来自 http://www.sxsky.net/xie/070684922.html

MUZZARELLI-RAA-1984-CARBOHYD-RES-V126-P225

MUZZARELLI-RAA-1987-CARBOHYD-POLYM-V7-P87

RATANAKAMNUAN-U-2016-CARBOHYD-POLYM-V87-P84

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WANG-ZB-2016-APPL-CLAY-SCI-V42-P146

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华南农业大学食品学院参考属性评定
有关论文范文主题研究:	关于数据库的论文范例	大学生适用:	自考毕业论文、学院学士论文
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ZHANG-XR-2007-MATER-LETT-V61-P1478

Record2of2.

Authors:Liu-BWang-XYYang-BSun-RC

Title:MICROWAVE-ASSISTEDSYNTHESISOFQUATERNIZEDCARBOXYMETHYLCHITOSANINAQUEOUS-SOLUTIONANDITSTHERMAL-BEHAVIOR

Fullsource:JOURNALOFMACROMOLECULARSCIENCEPARTA-PUREANDAPPLIEDCHEMISTRY2016,Vol49,Iss3,pp227-234

Language:English

Documenttype:Article

IDS/BookNo.:916CX

No.RelatedRecords:20

No.citedreferences:32

Addresses:S-CHINA-UNIV-TECHNOL,STATEKEYLABPULP&,PAPERENGN,GUANGZHOU510640,GUANGDONG,PEOPLES-R-CHINA

CHINESE-ACAD-SCI,GUANGZHOUINSTGEOCHEM,STATEKEYLABORGANGEOCHEM,GUANGZHOU,GUANGDONG,PEOPLES-R-CHINA

BEIJING-FORESTRY-UNIV,INSTBIOMASSCHEM&,TECHNOL,BEIJING100083,PEOPLES-R-CHINA

Authorkeywords:AQUEOUSSOLUTION,MICROWAVEIRRADIATION,QUATERNIZEDCARBOXYMETHYLCHITOSAN,THERMALSTABILITY

KeyWordsPlus:ANTIBACTERIALACTIVITY,ANTIMICROBIALACTIVITY,MOLECULAR-WEIGHT,IRRADIATION,WATER,PROPERTY

Abstract:Anovelpromisingpolyampholyte,beingwater-solublequaternizedcarboxymethylchitosan(QCM-chitosan),canbepreparedbygraftingcarboxymethylgroupsandquaternaryammoniumgroupsonchitosan.Traditionally,QCM-chitosanwasobtainedbyaconventionalheatingmethodinanicsolventforalengthytime.ThepresentstudywastoprepareQCM-chitosanrapidlyundermicrowaveirradiationfor70min,thewholepreparationproceededinwaterwithoutanyanicsolvent.Firstly,chitosanwascarboxymethylated,and

数据库相关论文范文文献sequentiallycarboxymethylchitosan(CM-chitosan)wasquaternizedtoobtainQCM-chitosan.QCM-chitosan'sstructurewascharacterized.GPC-LLSwereusedtoanalyzeitsweight-averagemolecularweight(M-w),andthedegreeofsubstitution(DS)wasdeterminedbytitration.ThethermalstabilityofQCM-chitosanwasmeasuredbyTGA.TheresultsprovedthatQCM-chitosanwassynthesized.Themaximumdegreeofsubstitution(DS)ofcarboxymethylgroupsandquaternaryammoniumgroupsundertheoptimumreactionconditionwas0.82and0.48,respectively.Comparedtochitosan,thethermalstabilityofQCM-chitosandecreasedbecauseofdisintegrationofintermolecularhydrogenbondingandpartialbreakingofthemolecularstructure,moreover,asDSofquaternaryammoniumandcarboxymethylgroupsincreased,QCM-chitosanshowedlowerthermalstability.Insummary,themicrowaveirradiationmethodisarapidandenvironmentallyfriendlyprocesstosynthesizesolublechitosanderivatives.

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