Carboxymethyl Cellulose (CMC) yog ib qho tseem ceeb ntawm cov dej-soluble polymer compound uas yog siv dav hauv cov khoom noj, tshuaj, tshuaj txhua hnub, textiles thiab lwm yam kev lag luam. Hauv kev lag luam khoom noj khoom haus, ib qho tseem ceeb tshaj plaws ntawm kev siv CMC yog ua cov thickener. Thickeners yog ib chav kawm ntawm cov khoom siv ntxiv uas ua rau kom cov viscosity ntawm cov kua tsis hloov pauv lwm yam khoom ntawm cov kua.
1. Cov qauv tshuaj thiab cov txheej txheem thickening ntawm carboxymethyl cellulose
Carboxymethylcellulose yog ib qho derivative ntawm cellulose tsim los ntawm kev hloov ib feem ntawm hydroxyl pawg (-OH) ntawm cellulose nrog carboxymethyl pawg (-CH2COOH). Nws cov qauv txheej txheem yooj yim yog cov saw txuas ntxiv ntawm β-D-glucose. Kev taw qhia ntawm carboxymethyl pawg muab CMC hydrophilicity, muab nws zoo solubility thiab thickening peev xwm nyob rau hauv dej. Nws txoj hauv kev thickening feem ntau yog nyob ntawm cov ntsiab lus hauv qab no:
Cov nyhuv o: CMC yuav o tom qab nqus dej molecules nyob rau hauv dej, tsim ib tug network qauv, kom cov dej molecules raug ntes nyob rau hauv nws cov qauv, ua rau lub viscosity ntawm lub system.
Cov txiaj ntsig them nqi: Cov pawg carboxyl hauv CMC yuav yog ib feem ionized hauv dej los tsim cov nqi tsis zoo. Cov pab pawg them nyiaj no yuav tsim electrostatic repulsion hauv dej, ua rau cov saw hlau molecular nthuav dav thiab tsim cov tshuaj nrog cov viscosity siab.
Saw ntev thiab concentration: Cov saw ntev thiab kev daws teeb meem ntawm CMC molecules yuav cuam tshuam rau nws cov nyhuv thickening. Feem ntau hais lus, qhov siab dua qhov hnyav molecular, qhov ntau dua qhov viscosity ntawm cov tshuaj; Nyob rau tib lub sij hawm, qhov siab dua qhov concentration ntawm cov tshuaj, lub viscosity ntawm lub system kuj nce.
Molecular cross-linking: Thaum CMC yog yaj hauv dej, vim yog qhov sib txuas ntawm cov molecules thiab tsim cov qauv hauv lub network, cov dej molecules raug txwv rau qee qhov chaw, ua rau txo qhov fluidity ntawm cov tshuaj, yog li qhia tau hais tias ib qho kev sib txuas ntawm cov khoom sib txuas ntawm cov khoom sib txuas. thickening nyhuv.
2. Kev siv cov carboxymethyl cellulose hauv kev lag luam khoom noj
Hauv kev lag luam zaub mov, carboxymethylcellulose yog dav siv los ua cov thickener. Cov hauv qab no yog qee qhov xwm txheej ntawm daim ntawv thov:
Cov dej haus thiab cov khoom siv mis nyuj: Hauv cov kua txiv hmab txiv ntoo thiab cov dej haus lactobacillus, CMC tuaj yeem ua kom cov viscosity ntawm cov dej haus, txhim kho saj thiab ua kom lub neej ntev. Tshwj xeeb tshaj yog nyob rau hauv cov khoom noj uas tsis muaj rog thiab tsis muaj rog, CMC tuaj yeem hloov ib feem ntawm cov mis nyuj rog thiab txhim kho kev ntxhib los mos thiab ruaj khov ntawm cov khoom.
Sauces thiab condiments: Nyob rau hauv nyias hnav khaub ncaws, lws suav sauce thiab soy sauce, CMC ua raws li ib tug thickener thiab tshem tawm cov neeg sawv cev los txhim kho cov uniformity ntawm cov khoom, tsis txhob delamination, thiab ua kom cov khoom ruaj khov.
Cov dej khov nab kuab thiab dej txias: Ntxiv CMC rau cov dej khov nab kuab thiab dej txias tuaj yeem txhim kho cov qauv ntawm cov khoom, ua rau nws denser thiab elastic dua, tiv thaiv kev tsim cov dej khov nab kuab thiab txhim kho saj.
Cov khoom ci ci thiab ci: Hauv cov khoom ci xws li qhob cij thiab khoom qab zib, CMC yog siv los ua lub khob noom cookie los txhim kho lub extensibility ntawm lub khob noom cookie, ua rau lub khob cij softer, thiab ntev lub txee lub neej.
3. Lwm cov ntaub ntawv thickening ntawm carboxymethyl cellulose
Ntxiv nrog rau cov zaub mov, carboxymethylcellulose feem ntau yog siv los ua cov thickener hauv cov tshuaj, tshuaj pleev ib ce, tshuaj niaj hnub thiab lwm yam lag luam. Piv txwv li:
Kev lag luam kws tshuaj: Hauv cov tshuaj, CMC feem ntau yog siv los ua kom tuab syrups, capsules, thiab ntsiav tshuaj, kom cov tshuaj muaj cov pwm zoo dua thiab tawg, thiab tuaj yeem txhim kho kev ruaj ntseg ntawm cov tshuaj.
Cov tshuaj pleev ib ce thiab cov tshuaj niaj hnub: Hauv cov tshuaj niaj hnub xws li tshuaj txhuam hniav, tshuaj zawv plaub hau, da dej gel, thiab lwm yam, CMC tuaj yeem ua kom cov khoom sib xws, txhim kho kev siv, thiab ua kom cov tshuaj pleev ib ce zoo thiab ruaj khov.
4. Kev nyab xeeb ntawm carboxymethyl cellulose
Kev nyab xeeb ntawm carboxymethylcellulose tau lees paub los ntawm ntau qhov kev tshawb fawb. Txij li CMC yog muab los ntawm cov cellulose ntuj thiab tsis zom thiab nqus hauv lub cev, nws feem ntau tsis muaj kev cuam tshuam rau tib neeg kev noj qab haus huv. Ob Lub Koom Haum Ntiaj Teb Kev Noj Qab Haus Huv (WHO) thiab Pawg Kws Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij rau Khoom Noj (JECFA) tau faib nws raws li cov khoom noj muaj kev nyab xeeb. Ntawm qhov koob tshuaj tsim nyog, CMC tsis tsim cov tshuaj lom thiab muaj qee yam lubrication thiab laxative cuam tshuam rau cov hnyuv. Txawm li cas los xij, kev noj ntau dhau tuaj yeem ua rau mob plab tsis zoo, yog li cov qauv siv tshuaj yuav tsum tau ua nruj me ntsis rau hauv kev tsim khoom noj.
5. Qhov zoo thiab qhov tsis zoo ntawm carboxymethylcellulose
Carboxymethylcellulose muaj nws qhov zoo thiab kev txwv raws li lub thickener:
Qhov zoo: CMC muaj dej zoo solubility, thermal stability thiab tshuaj stability, yog acid thiab alkali resistant, thiab tsis yooj yim degraded. Qhov no tso cai rau nws siv nyob rau hauv ntau yam kev ua ib puag ncig.
Qhov tsis zoo: CMC tuaj yeem dhau los ua viscous ntawm qhov siab siab thiab tsis haum rau txhua yam khoom. CMC yuav degrade nyob rau hauv ib tug acidic ib puag ncig, uas ua rau ib tug txo nyob rau hauv nws thickening nyhuv. Kev ceev faj yuav tsum tau siv thaum siv cov kua qaub los yog cov khoom noj.
Raws li ib qho tseem ceeb thickener, carboxymethylcellulose yog dav siv nyob rau hauv cov khoom noj, tshuaj, tshuaj pleev ib ce thiab lwm yam teb vim nws zoo solubility, thickening thiab stability. Nws superior thickening nyhuv thiab kev nyab xeeb ua rau nws ib tug nquag siv additive nyob rau hauv niaj hnub kev lag luam. Txawm li cas los xij, kev siv CMC kuj yuav tsum tau tswj xyuas kev tshawb fawb raws li cov kev xav tau tshwj xeeb thiab cov qauv siv tshuaj kom ntseeg tau tias qhov kev ua tau zoo ntawm nws cov kev ua tau zoo thiab kev nyab xeeb ntawm zaub mov.
Post lub sij hawm: Nov-04-2024