Carboxymethyl cellulose (sodium carboxyme thyl cellulose, CMC) yog cov hniav ntawm cellulose, thiab yog qhov tseem ceeb tshaj plaws ionic cellulose cov pos hniav.
CMC feem ntau yog ib qho anionic polymer compound npaj txhij los ntawm roycting ntuj cellulose nrog caustic alkali thiab monochloroacetic acid. Qhov hnyav molecular ntawm cov compound txawv ntawm ntau txhiab rau ib lab.
CMC Belongs rau kev hloov kho ntawm cov cellulose ntuj, thiab lub koom haum khoom noj thiab kev ua liaj ua teb Cov txheej txheem synthesis ntawm sodium carboxymethyl cellulose tau tsim los ntawm German E. Jansen hauv xyoo 1918, thiab tau paub txog lub ntiaj teb, thiab tom qab ntawd nws tau ua raws li cov neeg Europe.
CMC tau dav hauv roj av, geological, zaub mov noj, zaub mov, khoom lag luam thiab lwm yam kev lag luam, hu ua "Industrial Monosodium Glutamate".
Cov Txheej Txheem Txheej Txheem Ntawm CMC
CMC yog xim dawb lossis lub teeb daj daj, granular lossis fibrous khoom. Nws yog macromolecular tshuaj lom neeg uas tuaj yeem nqus dej thiab swell. Thaum nws swells hauv dej, nws tuaj yeem tsim lub pob tshab viscous kua nplaum. Cov pH ntawm cov aqueoused ncua yog 6.5-8.5. Cov tshuaj yog insoluble hauv cov kuab tshuaj muaj kuab tshuaj xws li ethanol, ethere, acetone thiab chloroform.
Khoom Cmc yog qhov ruaj khov rau lub teeb thiab chav sov, thiab tuaj yeem khaws cia ntev ntev hauv ib puag ncig. CMC yog hom cellulose ether, feem ntau yog cov ntsiab lus luv luv (sodium hydrochoacetate, qhov hnyav molecoroacetate, qhov hnyav molecular hnyav ntawm lub compound yog 6400 (± 1000). Muaj feem ntau ob txoj kev npaj: dej-cour txoj kev thiab cov qauv kuab. Tseem muaj lwm cov nroj tsuag ntoo siv los npaj cmc.
Nta thiab cov ntawv thov
CMC tsis yog tsuas yog ib qho zoo emulsification stabilizer thiab tuab nyob rau hauv cov ntawv thov zaub mov, tab sis kuj txhim kho qhov tsw zoo, thiab tuaj yeem txhim kho qhov tsw thiab muaj sijhawm ntev.
Xyoo 1974, cov koom haum zaub mov thiab kev ua liaj ua teb Kev nyab xeeb nkag (ADI) ntawm International txheej txheem yog 25mg / kg lub cev hnyav / hnub.
thickening thiab emulsion ruaj khov
Noj cmc tuaj yeem emulsify thiab ruaj khov dej muaj cov rog thiab cov protein. Qhov no yog vim CMC ua pob tshab rau hauv dej, thiab cov protein ntau ua rau muaj kev tiv thaiv nrog cov protein hauv lub xeev ruaj khov. Nws muaj ib qho kev tawm tsam emulsifying, yog li nws tuaj yeem txo cov nro ntawm cov rog thiab dej nyob rau tib lub sijhawm, kom cov rog tuaj yeem yog tag nrho emulsified.
CMC tuaj yeem txhim kho qhov ruaj khov ntawm cov khoom lag luam, vim tias thaum cov khoom siv protein los ntawm cov qauv muaj proteiates nrog cov protein ntau nrog cov protein, uas tuaj yeem txhim kho qhov ruaj khov ntawm cov khoom.
Nce ntau
Kev siv CMC nyob rau hauv cov dej khov khov yuav ua kom muaj kev nthuav dav qib ntawm cov mis nyuj khov, muab qhov loj thiab kev loj hlob ntawm cov muaju thaum lub sijhawm thauj mus los thiab chaw khaws khoom. Tus nqi siv yog 0.5% ntawm tag nrho cov feem sib ntxiv.
Qhov no yog vim CMC muaj cov dej ua kom zoo thiab tawg, thiab kev tso tawm cov protein, thiab cov roj molecules nyob rau hauv lub colloid los ua ib qho kev sib xyaw thiab lub kaw lus ruaj khov.
Hydrophilicity thiab rehydration
Qhov cuab yeej ua haujlwm ntawm CMC feem ntau siv hauv kev tsim khoom noj, uas tuaj yeem ua rau cov khoom siv honeycomb, kom cov dregcomb, thiab tseem muaj cov nyhuv ntawm kev ua kom sov thiab tshiab; Noodles ntxiv nrog CMC muaj cov dej zoo tuav lub peev xwm, ua noj ua tsis kam, thiab saj zoo.
Qhov no yog txiav txim siab los ntawm cov qauv molecular ntawm CMC, uas yog ib pawg cellulose thiab muaj pab pawg hydrophilic hauv cov myrophilicity ntau dua li cellulose ntau dua li cellulose thiab dej muaj peev xwm tuav tau.
kev sib tshuam
Thixotropic CMC txhais tau tias cov macromolecular chains muaj qee qhov kev cuam tshuam thiab nyiam tsim ib qho kev sib txuas lus sib txawv. Tom qab peb-seem qauv yog tsim, lub viscosity ntawm cov kev daws teeb meem, thiab tom qab peb-seem qauv yog tawg, lub viscosity txo. Lub thixotrotropy tshwm sim yog tias pom viscosity hloov nyob ntawm lub sijhawm.
Thixotropic CMC ua lub luag haujlwm tseem ceeb hauv txoj kev sib tw thiab tuaj yeem siv los ua jelly, jam thiab lwm yam zaub mov.
Tuaj yeem siv tau raws li kev pom meej, ua npuas dej stabilizer, nce qhov ncauj
CMC tuaj yeem siv tau rau hauv caw ntau lawm los ua kom cov saj ntau mellow thiab nplua nuj nrog ntev ntxiv; Nws tuaj yeem raug siv ua npuas dej stabilizer nyob rau hauv lamer ntau lawm los ua npuas ncauj nplua nuj thiab ntev-ntev thiab ua ntev thiab txhim kho qhov saj.
CMC yog hom polyelectrolyte, uas yuav koom nrog ntau yam kev tawm tsam hauv cawv txiv hmab kom muaj qhov sib npaug ntawm cov cawv. Nyob rau tib lub sijhawm, nws tseem ua ke nrog cov muaju uas tau tsim, hloov cov qauv ntawm cov muaju hauv cawv, thiab ua rau muaj nag lossis nag. Kev sib sau ua ke ntawm tej yam.
Lub Sijhawm Post: Feb-14-2025