Carboxymethyl Cellulose (CMC) yog ib qho tseem ceeb hauv dej-soluble polymer compound uas siv dav hauv cov khoom noj, tshuaj, tshuaj txhua hnub, textiles thiab lwm yam teb. Hauv kev lag luam khoom noj khoom haus, ib qho ntawm cov kev siv tseem ceeb tshaj plaws ntawm CMC yog ua ib qho thickener. Thickeners yog ib chav kawm ntawm cov additives uas ua rau kom cov kua viscosity ntau dua yam tsis hloov pauv lwm yam khoom ntawm cov kua.
1. Cov qauv tshuaj lom neeg thiab cov ntsiab cai ntawm carboxymethyl cellulose
Carboxymethylcellulose yog ib qho derivative ntawm cellulose tsim los ntawm kev hloov ib feem ntawm cov hydroxyl pawg (-OH) ntawm cellulose nrog carboxymethyl pawg (-CH2COOH). Nws cov qauv yooj yim yog ib txoj saw rov ua dua ntawm β-D-glucose. Kev qhia txog carboxymethyl pawg muab CMC hydrophilicity, muab nws zoo solubility thiab thickening peev xwm hauv dej. Nws cov thickening hauv paus ntsiab lus yog raws li cov ntsiab lus hauv qab no:
Cov nyhuv o: CMC yuav o tom qab nqus cov dej molecules hauv dej, tsim ib lub network qauv, yog li ntawd cov dej molecules raug ntes hauv nws cov qauv, ua rau lub viscosity ntawm lub system nce ntxiv.
Cov nyhuv them: Cov carboxyl pawg hauv CMC yuav raug ionized ib feem hauv dej los tsim cov nqi tsis zoo. Cov pawg them no yuav tsim electrostatic repulsion hauv dej, ua rau cov saw hlau molecular nthuav tawm thiab tsim cov tshuaj nrog viscosity siab.
Qhov ntev ntawm cov saw thiab qhov concentration: Qhov ntev ntawm cov saw thiab qhov concentration ntawm cov tshuaj CMC molecules yuav cuam tshuam rau nws cov nyhuv thickening. Feem ntau hais lus, qhov siab dua qhov hnyav ntawm cov molecular, qhov ntau dua qhov viscosity ntawm cov tshuaj; tib lub sijhawm, qhov siab dua qhov concentration ntawm cov tshuaj, qhov viscosity ntawm lub system kuj nce ntxiv.
Kev sib txuas ntawm cov molecule: Thaum CMC yaj rau hauv dej, vim yog kev sib txuas ntawm cov molecule thiab kev tsim cov qauv network, cov dej molecule raug txwv rau cov cheeb tsam tshwj xeeb, ua rau cov kua dej ntawm cov tshuaj tsawg dua, yog li ntawd qhia txog cov nyhuv tuab.
2. Daim ntawv thov ntawm carboxymethyl cellulose hauv kev lag luam zaub mov
Hauv kev lag luam khoom noj, carboxymethylcellulose yog siv dav ua cov khoom ua kom tuab. Cov hauv qab no yog qee qhov xwm txheej siv:
Cov dej haus thiab cov khoom noj mis nyuj: Hauv cov kua txiv hmab txiv ntoo thiab cov dej haus lactobacillus, CMC tuaj yeem ua rau cov dej haus viscosity ntau dua, txhim kho qhov saj thiab ntev lub txee lub neej. Tshwj xeeb tshaj yog rau cov khoom noj mis nyuj uas muaj roj tsawg thiab tsis muaj roj, CMC tuaj yeem hloov ib feem ntawm cov rog mis nyuj thiab txhim kho qhov kev ntxhib los mos thiab kev ruaj khov ntawm cov khoom.
Cov kua ntses thiab cov khoom qab zib: Hauv cov kua zaub xam lav, cov kua txiv lws suav thiab cov kua ntses taum pauv, CMC ua haujlwm ua cov khoom ua kom tuab thiab cov khoom siv los txhim kho qhov sib xws ntawm cov khoom, zam kev tawg, thiab ua kom cov khoom ruaj khov dua.
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 ntom dua thiab ywj dua, tiv thaiv kev tsim cov dej khov nab kuab thiab txhim kho qhov saj.
Cov mov ci thiab cov khoom ci: Hauv cov khoom ci xws li mov ci thiab ncuav mog qab zib, CMC yog siv los ua cov khoom txhim kho cov hmoov nplej kom txhim kho qhov ntev ntawm cov hmoov nplej, ua rau cov mov ci mos dua, thiab ntev lub txee lub neej.
3. Lwm cov ntawv thov ua kom tuab ntawm carboxymethyl cellulose
Ntxiv rau cov khoom noj, carboxymethylcellulose feem ntau siv ua cov khoom ua kom tuab hauv cov tshuaj, cov tshuaj pleev ib ce, cov tshuaj siv niaj hnub thiab lwm yam lag luam. Piv txwv li:
Kev lag luam tshuaj: Hauv cov tshuaj, CMC feem ntau siv los ua kom cov kua txiv hmab txiv ntoo, tshuaj ntsiav, thiab cov ntsiav tshuaj tuab, yog li cov tshuaj muaj cov teebmeem molding thiab disintegration zoo dua, thiab tuaj yeem txhim kho kev ruaj khov ntawm cov tshuaj.
Cov tshuaj pleev ib ce thiab cov tshuaj siv niaj hnub: Hauv cov tshuaj siv niaj hnub xws li tshuaj txhuam hniav, tshuaj zawv plaub hau, tshuaj da dej, thiab lwm yam, CMC tuaj yeem ua rau cov khoom sib xws, txhim kho kev siv, thiab ua rau cov tshuaj nplaum sib xws thiab ruaj khov.
4. Kev nyab xeeb ntawm carboxymethyl cellulose
Kev nyab xeeb ntawm carboxymethylcellulose tau lees paub los ntawm ntau txoj kev tshawb fawb. Vim tias CMC yog los ntawm cov cellulose ntuj thiab tsis zom thiab nqus tau hauv lub cev, nws feem ntau tsis muaj kev cuam tshuam tsis zoo rau tib neeg kev noj qab haus huv. Ob lub Koom Haum Kev Noj Qab Haus Huv Ntiaj Teb (WHO) thiab Pawg Neeg Saib Xyuas Kev Sib Koom Tes ntawm Cov Khoom Noj Khoom Haus Additives (JECFA) faib nws ua cov khoom noj khoom haus additive muaj kev nyab xeeb. Ntawm cov koob tshuaj tsim nyog, CMC tsis tsim cov tshuaj lom thiab muaj qee yam kev ua kom lubrication thiab laxative rau txoj hnyuv. Txawm li cas los xij, kev noj ntau dhau yuav ua rau mob plab hnyuv, yog li cov qauv tshuaj uas tau teev tseg yuav tsum tau ua raws li hauv kev tsim khoom noj.
5. Cov txiaj ntsig thiab qhov tsis zoo ntawm carboxymethylcellulose
Carboxymethylcellulose muaj nws cov txiaj ntsig thiab cov kev txwv ua ib qho thickener:
Qhov Zoo: CMC muaj cov dej solubility zoo, thermal stability thiab tshuaj stability, yog acid thiab alkali resistant, thiab tsis yooj yim decompose. Qhov no tso cai rau nws siv rau hauv ntau yam kev ua haujlwm ib puag ncig.
Qhov Tsis Zoo: CMC yuav ua rau nws nplaum dhau thaum muaj ntau cov tshuaj thiab tsis haum rau txhua yam khoom. CMC yuav lwj thaum muaj kua qaub, ua rau nws cov tuab zuj zus. Yuav tsum ceev faj thaum siv nws rau hauv cov dej haus lossis cov khoom noj uas muaj kua qaub.
Ua ib qho tseem ceeb thickener, carboxymethylcellulose yog siv dav hauv cov khoom noj, tshuaj, tshuaj pleev ib ce thiab lwm yam teb vim nws cov dej solubility zoo, thickening thiab stability. Nws cov thickening effect thiab kev nyab xeeb ua rau nws yog ib qho khoom siv feem ntau hauv kev lag luam niaj hnub no. Txawm li cas los xij, kev siv CMC kuj tseem yuav tsum tau tswj hwm los ntawm kev tshawb fawb raws li qhov xav tau tshwj xeeb thiab cov qauv tshuaj kom ntseeg tau tias nws ua tau zoo tshaj plaws thiab kev nyab xeeb zaub mov.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-04-2024