Kev txheeb xyuas ntawm Purity thiab Structure of Dyes (1) Thin Layer Analysis: Siv cyclohexane/acetone=1/1 thiab chloroform/acetone=9/1 thiab acetone/cyclohexane=3/2 thiab chloroform/ acetone=9/1 raws li kev tsim cov tshuaj, qhov purity ntawm cov dyes tau los ntawm ob kab chromatography sib cais tau txheeb xyuas.
(2) Lub melting point ntawm cov dye sib cais yog ntsuas los ntawm ib tug X15 micro melting point tester (microcomputer tswj kub hom), thiab purity ntawm cov xim yog txiav txim los ntawm nws melting ntau yam.
(3) Cov txheej txheem infrared spectroscopy kuaj pom cov qauv ntawm cov purified dye siv Fourier transform infrared spectrometer. Txiav txim siab seb cov khoom sib xyaw ua ke zoo li cas rau nws cov qauv tsim los ntawm kev tsom xam spectral.
Daim ntawv thov kev ua tau zoo ntawm cov xim hluavtaws yog siv rau thermal hloov luam ntawv thwmsim ntawm paj rwb, sib piv cov kev hloov ua ntej thiab tom qab ntxuav xab npum. Sib tov cov xim hloov nrog cov xim daj thiab xim dub uas twb muaj lawm, thiab tom qab ntawd ua kom sov so xab npum ntxuav.
Kev sim tau pom tias thawj txoj hauv kev hloov pauv hloov pauv qhov qub - NH2 nrog - NHCOCH3 thiab - NHC0CH2C1 pawg, thiab tom qab ntawd hloov cov xim hloov pauv mus rau cov paj rwb, uas ua rau cov xim daj daj rau cov qauv ntaub. . Qhov no qhia tau hais tias txawm hais tias - NH2 pawg koom nrog tib pab pawg tshem tawm electron li - NHCOCH3 thiab - NHCOCH2C1 pawg, qhov sib txawv ntawm cov khoom siv hluav taws xob tshem tawm ntawm peb pawg ua rau ntau qib kev pab xim, uas ua rau cov xim sib txawv ntawm cov xim. Tsis tas li ntawd, cov xim ntawm cov ntaub tau txais cov qauv hloov mus rau lub teeb liab kev taw qhia tom qab ntxuav xab npum, thiab cov xim hloov tab sis tsis ploj tom qab ntxuav xab npum.
Raws li kev hloov kho thib ob, tus thawj - NH2 yog hydrolyzed los ntawm diazotization cov tshuaj tiv thaiv rau -0H. Cov dye hloov pauv yog tshav kub hloov mus rau cov paj rwb kho, thiab cov ntaub qauv xim yog txiv kab ntxwv. Nws tsis hloov xim lossis ploj tom qab ntxuav xab npum.
Txoj kev txhim kho thib peb yog los hloov cov thawj phenoxy pawg nrog ib pab pawg phenoxy hloov. Thawj ob qhov kev hloov kho dyes tau kub hloov mus rau cov paj rwb kho, thiab cov qauv ntaub ua rau muaj xim ze dua rau magenta piv rau C1I1 Disperse Red 60. Ob qho tshuaj ntxuav tes ntxuav cov xim hloov thiab fading ceev tau raws li cov qauv. Sib tov nws nrog cov xim xiav thiab daj dispersed uas twb muaj lawm los tsim lwm yam xim, ua rau cov xim ntshiab thiab zoo xab npum ceev.
Los ntawm lub rooj, nws tuaj yeem pom tias vim muaj cov xim sib txawv ntawm anthraquinone dyes, muaj qhov sib txawv ntawm cov xim hloov thiab cov xim qub. Qhov kev hloov ntawm 1- txoj hauj lwm NH2 ua rau muaj kev hloov ntawm cov xim thiab xab npum ceev ntawm cov xim, thaum qhov kev hloov ntawm 2- txoj hauj lwm tail group phenoxy pawg hloov cov dyeing kev ua tau zoo ntawm cov dyeing. Piv nrog rau C1I1 Disperse Liab 60, cov xab npum ceev ntawm dyes 604 thiab 605 yog qhov tsim nyog rau kev hloov pauv kub ntawm cov paj rwb ntaub.
Xaus: Kev cuam tshuam ntawm pab pawg xim ntawm cov xab npum ntxuav ceev ceev ntawm dyes yog qhov tseem ceeb heev. Cov pab pawg sib txawv ntawm cov xim sib txawv ua rau muaj qhov sib txawv tseem ceeb hauv xab npum ntxuav ceev ntawm paj rwb tshav kub hloov luam ntawv. Cov xim magenta nrog kev ua tau zoo dua rau cov paj rwb ntshiab yog tsim los ntawm kev hloov kho cov qauv ntawm cov anthraquinone dye C1I1 uas twb muaj lawm dispersed liab 60 thiab qhia cov neeg hloov tshiab. Nws tuaj yeem pom tau tias nws muaj peev xwm siv anthraquinone raws li dispersed dyes rau thermal hloov luam ntawv ntawm cov paj rwb ntshiab los ntawm kev hloov kho cov qauv zoo.
Tsis tshua muaj qhov nrog ruaj khov tuaj yeem ua rau xau taus thiab txo cov luam tawm zoo, thiab ntau yam kev xav tau ntawm 115510 centipoise.
Txoj kev ntsuas kev ruaj ntseg ceev ceev rau cov kua qaub dyes yog raws li tau piav qhia ua ntej. Rau cov kua qaub dyes, lawv yuav tsum yog high-purity dyes tsis muaj ntsev thiab lwm yam impurities, yog li lawv yuav tsum tau lim thiab nyias nyias kom tshem tawm ntsev thiab lwm yam impurities.
Tom qab siv tswv yim, cov txheej txheem hauv qab no tuaj yeem siv los ntsuas qhov ruaj khov ntawm cov kua qaub dyes: npaj 20g dye thiab 80ml dej ntshiab sib cais; 30 g dye +70ml dej ntshiab; 50 g dye +50ml dej ntshiab.
Peb qhov sib txawv ntawm cov xim aqueous daws tau pom tom qab tso tseg rau 1 teev (siv cov ntawv lim los saib xyuas qhov sib txawv thiab nag lossis daus ntawm cov tee dej poob rau ntawm nws), thiab tom qab sawv rau 24 teev, kev ruaj ntseg tau txiav txim siab los ntawm kev lim dej (funnel inch 415mm) los soj ntsuam lub sij hawm dhau mus thiab residual impurities.
Cowint yog lub Hoobkas DTF loj tshaj plaws hauv Suav teb
