Sodium carboxymethyl cellulose (CMC), tseem hu ua carboxymethyl cellulose.Nws yog ib tug high-polymer cellulose ether npaj los ntawm chemically hloov tej yam ntuj tso cellulose, thiab nws cov qauv yog tsim los ntawm D-glucose units txuas los ntawm β_(14) glycosidic bonds.
CMC yog dawb los yog mis nyuj dawb fibrous hmoov los yog granules nrog ib tug ceev ntawm 0.5g / cm3, yuav luag tasteless, odorless thiab hygroscopic.
Carboxymethyl cellulose yog ib qho yooj yim rau disperse, tsim cov pob tshab colloidal tov nyob rau hauv dej, thiab yog insoluble nyob rau hauv cov organic solvents xws li ethanol.
Thaum pH> 10, pH tus nqi ntawm 1% aqueous tov yog 6.5≤8.5.
Cov tshuaj tiv thaiv tseem ceeb yog raws li hauv qab no: lub ntuj cellulose yog thawj alkalized nrog NaOH, ces chloroacetic acid ntxiv, thiab cov hydrogen ntawm hydroxyl pab pawg neeg ntawm cov piam thaj reacts nrog cov carboxymethyl pawg nyob rau hauv chloroacetic acid.
Nws tuaj yeem pom los ntawm cov qauv uas muaj peb pawg hydroxyl ntawm txhua chav tsev qabzib, uas yog C2, C3 thiab C6 hydroxyl pawg, thiab kev hloov qib ntawm hydrogen ntawm pawg hydroxyl ntawm cov piam thaj yog sawv cev los ntawm lub cev thiab tshuaj ntsuas ntsuas.
Yog tias cov hydrogens ntawm peb pawg hydroxyl ntawm txhua chav hloov pauv los ntawm pawg carboxymethyl, tom qab ntawd qhov kev hloov pauv tau txhais tau tias yog 7-8, nrog rau qib siab tshaj plaws ntawm kev hloov pauv ntawm 1.0 (qib zaub mov tsuas yog ua tiav qib no xwb).Cov degree ntawm kev hloov ntawm CMC ncaj qha cuam tshuam rau solubility, emulsification, thickening, stability, acid kuj thiab ntsev tsis kam ntawm CMC.
Thaum siv CMC cov khoom, peb yuav tsum nkag siab tag nrho cov ntsiab lus Performance index, xws li stability, viscosity, acid kuj, viscosity, thiab lwm yam.
Tau kawg, cov ntawv thov sib txawv siv cov carboxymethyl cellulose sib txawv, vim tias muaj ntau hom viscosity ua rau carboxymethyl cellulose, thiab cov ntsuas lub cev thiab tshuaj lom neeg kuj txawv.Paub txog cov no, koj tuaj yeem paub xaiv cov khoom tsim nyog.
Post lub sij hawm: Nov-07-2022