羧甲基玉米淀粉合成新工艺

334Vol.33No.420057JOURNALOFNORTHEASTFORESTRYUNIVERSITYJul.2005(,,150040),,,:13%,4mL/g,85%,40,70min,40,4h;;O636.1SyntheticProcessesofCarboxymethylCornStarch/WangTing,SongYe,ZhengXiuli,ChenXiaoyan,LiGenrong,LiKaoxue(NortheastForestryUniversity,Harbin150040,P.R.China)//JournalofNortheastForestryUniversity.-2005,33(4).-113114Carboxylmethylstarchwithhigherdegreeofsubstitutionwaspreparedinethanolmediumbyusingtwostepadditionofalkali.Thefactorsdeterminingthesubstitutiondegreeandviscosityofproductwereinvestigatedbyorthogonalexperimentdesigns,andtheoptimumreactionconditionswereobtained:theconcentrationsofalkali,starch,ethanolwere13%,4mL/g,85%,respectively;alkalizationunder40for70minandetherificationunder40for4h.KeywordsCarboxymethystarch;Highdegreeofsubstitution;Synthesis(CMS),(CMC),,,[1],,,,[29],,;,,;,,,,,,,,,,,,,,CMS,CMS,,1();();();();();();JJ-1;NDJ-122.1CMS:StarchOH+NaOHStarchONa+H2O;StarchONa+ClCH2COONaStarch%O%CH2COONa+NaCl:,,198010,,:2004610::ClCH2COONa+NaOHHOCH2COONa+NaCl112.290mL,,30mL,,,60%,,,,,,,,[1012]33.14070min13%11,1,21(A)%(B)/(C)/h(D)/mLg-1175402328050343856045©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2ABCD111110.20212220313330421330.50522210.09623120731320.68832130933210k1/30.070.460.070.10k2/30.200.030.030.23k3/30.2300.390.17(R)0.160.430.360.132,:,,25234525:1),;2),;3),;4),,4mL/g,,7:85%,40,4h,4mL/g3.2:13%,4mL/g,85%,40,70min,40,4h,,,33pH/mpas%184550.6893284620.65894,:85%;40,70min;40,34h1,..,1995,23(5):10122..,1998,19(2):82863..(),1996,17(4):75784,,..(),1997,18(3):2562595,,,.CMS.,1999,21(3):26296,,,..(),1997,25(2):56597,..,2001,26(1):52568,,..,2001,30(1):9119,..,2000(4):91210,,..,1996,26(3):121411,,..,1990(2):454712,,,..,1997,33(4):394141133©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.