Carboxymethyl cellulose (sodium carboxyme thyl cellulose, CMC) yog carboxymethylated derivative ntawm cellulose, tseem hu ua cellulose gum, thiab yog cov pos hniav ionic cellulose tseem ceeb tshaj plaws.
CMC feem ntau yog anionic polymer compound npaj los ntawm reacting natural cellulose nrog caustic alkali thiab monochloroacetic acid.Qhov hnyav molecular ntawm cov compound sib txawv ntawm ntau txhiab mus rau ib lab.
CMC belongs rau kev hloov kho ntawm ntuj cellulose, thiab Food and Agriculture Organization of United Nations (FAO) thiab World Health Organization (WHO) tau hu ua nws "hloov cellulose".Cov txheej txheem synthesis ntawm sodium carboxymethyl cellulose tau tsim los ntawm German E. Jansen hauv xyoo 1918, thiab nws tau patented hauv 1921 thiab tau paub rau lub ntiaj teb, thiab tom qab ntawd nws tau ua lag luam hauv Tebchaws Europe.
CMC yog dav siv hauv roj av, geological, tshuaj txhua hnub, zaub mov, tshuaj thiab lwm yam lag luam, hu ua "kev lag luam monosodium glutamate".
※Cov yam ntxwv ntawm CMC
CMC yog hmoov dawb los yog lub teeb daj, granular lossis fibrous khoom.Nws yog cov tshuaj macromolecular uas tuaj yeem nqus dej thiab o.Thaum nws swells hauv dej, nws tuaj yeem tsim cov kua nplaum pob tshab.Lub pH ntawm aqueous suspension yog 6.5-8.5.Cov tshuaj yog insoluble nyob rau hauv cov organic solvents xws li ethanol, ether, acetone thiab chloroform.
Khoom CMC yog qhov ruaj khov rau lub teeb thiab chav tsev kub, thiab tuaj yeem khaws cia rau lub sijhawm ntev hauv qhov chaw qhuav.CMC yog ib hom cellulose ether, feem ntau yog ua los ntawm luv luv paj rwb linters (cellulose cov ntsiab lus mus txog 98%) los yog ntoo pulp, kho nrog sodium hydroxide thiab ces reacted nrog sodium monochloroacetate, lub molecular luj ntawm lub compound yog 6400 (± 1000).Feem ntau muaj ob txoj kev npaj: dej-coal txoj kev thiab txoj kev hnyav.Tseem muaj lwm cov nroj tsuag fibers siv los npaj CMC.
※Nta thiab daim ntawv thov
CMC tsis yog tsuas yog ib qho zoo emulsification stabilizer thiab thickener nyob rau hauv daim ntawv thov zaub mov, tab sis kuj muaj zoo heev khov thiab melting stability, thiab tuaj yeem txhim kho qhov tsw ntawm cov khoom thiab ntev lub sij hawm cia.
Xyoo 1974, Lub Koom Haum Saib Xyuas Khoom Noj thiab Kev Ua Liaj Ua Teb ntawm United Nations (FAO) thiab Lub Koom Haum Saib Xyuas Kev Noj Qab Haus Huv Ntiaj Teb (WHO) tau pom zoo siv CMC ntshiab hauv cov zaub mov tom qab kev tshawb fawb thiab kev sim tshuaj lom neeg thiab tshuaj lom neeg.Kev noj zaub mov zoo (ADI) ntawm tus qauv thoob ntiaj teb yog 25mg / kg lub cev hnyav / hnub.
※ Thickening thiab emulsion stability
Noj CMC tuaj yeem emulsify thiab ruaj khov dej haus uas muaj roj thiab protein.Qhov no yog vim CMC dhau los ua pob tshab ruaj khov colloid tom qab tau yaj hauv dej, thiab cov khoom siv protein ua cov khoom siv nrog tib tus nqi raws li kev tiv thaiv ntawm colloidal membrane, uas tuaj yeem ua rau cov khoom muaj protein nyob hauv lub xeev ruaj khov.Nws muaj cov nyhuv emulsifying, yog li nws tuaj yeem txo qhov nro ntawm cov roj thiab dej tib lub sijhawm, kom cov roj tuaj yeem ua tiav emulsified.
CMC tuaj yeem txhim kho qhov ruaj khov ntawm cov khoom, vim tias thaum pH tus nqi ntawm cov khoom sib txawv los ntawm isoelectric point ntawm cov protein, sodium carboxymethyl cellulose tuaj yeem tsim cov qauv sib xyaw nrog cov protein, uas tuaj yeem txhim kho kev ruaj ntseg ntawm cov khoom.
※Nce ntau
Kev siv CMC hauv cov dej khov nab kuab tuaj yeem ua rau muaj kev nthuav dav ntawm cov dej khov nab kuab, txhim kho cov melting ceev, muab cov duab zoo thiab saj, thiab tswj qhov loj thiab loj hlob ntawm cov dej khov nab kuab thaum thauj thiab khaws cia.Tus nqi siv yog 0.5% ntawm tag nrho cov Proportioned ntxiv.
Qhov no yog vim CMC muaj dej tuav zoo thiab dispersibility, thiab organically combines protein hais, rog globules, thiab dej molecules nyob rau hauv colloid los tsim ib tug uniform thiab ruaj khov system.
※Hydrophilicity thiab Rehydration
Cov cuab yeej ua haujlwm no ntawm CMC feem ntau yog siv rau hauv kev tsim cov qhob cij, uas tuaj yeem ua rau lub ntsej muag sib txawv, ua kom lub ntim, txo cov dregs, thiab tseem muaj cov nyhuv ntawm kev txuag hluav taws xob thiab freshness;noodles ntxiv nrog CMC muaj peev xwm tuav dej zoo, ua noj ua haus, thiab saj zoo.
Qhov no yog txiav txim los ntawm cov qauv molecular ntawm CMC, uas yog ib tug cellulose derivative thiab muaj ib tug loj tus naj npawb ntawm hydrophilic pawg nyob rau hauv lub molecular saw: -OH pawg, -COONa pawg, yog li CMC muaj zoo hydrophilicity tshaj cellulose thiab dej tuav peev.
※ Gelation
Thixotropic CMC txhais tau hais tias cov macromolecular chains muaj qee qhov kev sib cuam tshuam thiab zoo li tsim cov qauv peb sab.Tom qab tsim peb-seem qauv, viscosity ntawm cov tshuaj nce, thiab tom qab cov qauv peb-dimensional tawg, viscosity txo.Qhov tshwm sim ntawm thixotropy yog qhov pom tseeb viscosity hloov nyob ntawm lub sijhawm.
Thixotropic CMC plays lub luag haujlwm tseem ceeb hauv gelling system thiab tuaj yeem siv los ua jelly, jam thiab lwm yam khoom noj.
Yuav siv tau raws li clarifier, ua npuas ncauj stabilizer, nce qhov ncauj
CMC tuaj yeem siv rau hauv kev tsim cov cawv kom ua rau lub saj ntau mellow thiab nplua nuj nrog ntev aftertaste;nws tuaj yeem siv ua npuas dej stabilizer hauv npias tsim kom ua npuas ncauj nplua nuj thiab kav ntev thiab txhim kho saj.
CMC yog ib hom polyelectrolyte, uas tuaj yeem koom nrog ntau yam kev cuam tshuam hauv cawv los tswj qhov sib npaug ntawm lub cev cawv.Nyob rau tib lub sijhawm, nws kuj tseem ua ke nrog cov crystals uas tau tsim, hloov cov qauv ntawm cov muaju, hloov cov xwm txheej ntawm lub neej ntawm cov muaju hauv cawv, thiab ua rau nag lossis daus.Aggregation ntawm yam.
Post lub sij hawm: Dec-03-2022