Carboxymethyl cellulose (CMC) yog siv dej-soluble polymer compound nrog qhov zoo dispersibility, thickening thiab colloidal ruaj khov. Nws tau los ntawm hloov cov pawg hydroxyl ntawm lub cellulose molecular saw nrog cov pawg carboxymethyl (-ch2Cooh). Qhov kev hloov kho tshuaj lom neeg no ua rau CMC molecule muaj muaj zog hydrophilicity thiab zoo tshaj plaws kev daws teeb meem, khoom noj khoom haus, tshuaj, tshuaj pleev ib ce thiab lwm thaj teb.
1. Kev txhais thiab cuam tshuam txog cov ntsiab lus ntawm CMC Dispersibility
Qhov kev tawm tsam ntawm CMC feem ntau yog hais txog nws lub peev xwm los disperse thiab yaj hauv dej lossis lwm yam kuab tshuaj. Cellulose nws tus kheej yog insoluble hauv dej, tab sis tom qab hloov kho, cmc muaj cov dej solubility zoo. Nws qhov kev tsis sib haum yog cuam tshuam los ntawm ntau yam, feem ntau yog suav nrog cov hauv qab no:
Molecular hnyav: qhov hnyav molecular hnyav ntawm cmc ncaj qha cuam tshuam nws solubility thiab dispersibility. Lub cev hnyav dua feem ntau txhais tau tias cov qauv molecular loj dua, uas yuav ua rau qeeb qeeb ntawm kev daws teeb meem zaum kawg, yog li cuam tshuam cov nyhuv dispersion. CMC nrog qis dua molecular hnyav muaj kev tawm tsam zoo dua hauv kev daws teeb meem, tab sis nws cov nyhuv tuab yog tsis muaj zog.
Qib ntawm Carboxymethylation: Qhov tawg ntawm cmc yog ze ze rau nws cov degree ntawm kev hloov kho tshuaj. Qib siab dua ntawm Carboxymethylation txhais tau ntau pab pawg hydrophish, yog ua rau cov kev sib cuam tshuam ntawm lwg me me, yog li txhim kho cov solubility thiab dispersibility ntawm cmc. Ntawm qhov tsis sib xws, txo qis cov carboxymethylation tej zaum yuav ua rau kev tsis zoo ntawm cmc, lossis txawm tias nyuaj hauv kev yaj.
PH tus nqi ntawm kev daws teeb meem: cov solubility thiab dispersibility ntawm cmc yuav txawv ntau ntawm cov pH qhov tseem ceeb. Hauv cov acidic lossis neutral ib puag ncig, CMC feem ntau ntau dua ntais; Thaum nyob hauv qab cov xwm txheej Alkaline, CMC Hydrophilicity yog txhim kho, uas yuav ua rau viscos thiab cuam tshuam nws dispersibility. Yog li ntawd, kev hloov kho tus nqi pH yog qhov tseem ceeb rau qhov tawg ntawm cmc.
Ionic lub zog: lub ion concentration hauv kev daws yuav cuam tshuam rau qhov kev tsis sib xws ntawm CMC. Cov kua ntau ntawm cov ntsev lossis lwm yam dej paug yuav txo nws solubility thiab dispersibility los ntawm kev cuam tshuam nrog cov nqi tsis zoo hauv CMC lwg me me. CMC cov khoom ua pov thawj zoo dispersion nyhuv nyhuv hauv lub zog ionic tsawg.
Qhov kub thiab txias: Qhov kub thiab txias kuj muaj qee qhov cuam tshuam ntawm kev tawg ntawm cmc. Feem ntau, qhov nce hauv qhov kub yuav ua kom nrawm txheej txheem kev sib cais ntawm cmc thiab txhim kho qhov tsis tawg. Txawm li cas los xij, kev kub dhau heev yuav ua rau cov tawg lossis sib sau ua ke ntawm CMC molecular saw, uas nyob rau hauv lem cuam tshuam nws cov kev ruaj khov thiab dispersion nyhuv. Yog li no, kev tswj kom tsim nyog ntawm qhov kub yog qhov tseem ceeb rau kev tawg ntawm cmc.
2. Daim ntawv thov teb ntawm CMC Dispersibility
Qhov zoo tshaj plaws ntawm cmc ua rau nws dav siv nyob rau hauv ntau thaj teb. Hauv qab no yog qee qhov chaw thov tseem ceeb:
Cov xim pleev xim rau cov xim tha xim: nyob rau hauv cov txheej txheem npaj ntawm cov txheej txheem npaj thiab cov xim pleev xim, tuaj yeem ua kom zoo dua ntais thiab lwm yam khoom thiab tiv thaiv lawv ntawm kev daws teeb meem. Vim nws muaj zog hydrophilicity, cmc tuaj yeem ua tiav qhov tsis muaj zog hauv dej ua haujlwm, yog li kev txhim kho qhov ruaj ntseg thiab kev sib txawv ntawm cov txheej.
Kev Lag Luam Khoom Noj: CMC, raws li cov tuab dua thiab stabilizer, yog siv dav hauv kev lag luam khoom noj, xws li jelly, khoom qab zib, khaub noom thiab mov ci. Nyob rau hauv cov zaub mov, cml pab txhim kho cov qauv thiab saj ntawm cov khoom, thaum ua kom muaj kev sib xyaw ntawm cov khoom nyoos los ntawm kev txhim kho dispersibility.
Kws npaj tshuaj: hauv kev lag luam kev lag luam, cmc yog siv los ua cov tshuaj tsis huv thiab cov tawv nqaij, tshuaj ntsuab, qhov muag thiab lwm yam kev npaj. Nws qhov kev tsis pom zoo zoo pab kom cov khaub ncaws sib luag ntawm cov tshuaj muaj tshuaj thiab txhim kho kev ruaj ntseg ntawm kev ua tau tshuaj.
Kev Lag Luam Kev Lag Luam: CMC tseem dav siv hauv cov tshuaj pleev ib ce, tshwj xeeb tshaj yog cov khoom lag luam xws li lotions, tshuaj pleev ntaub qhwv, tshuaj ntxhua thiab cov gels da dej. Nws qhov kev tawm tsam tuaj yeem ua kom cov khaub ncaws sib luag ntawm cov khoom xyaw thiab txhim kho kev ruaj khov thiab siv cov khoom lag luam.
Cov ntawv thiab textiles: cmc feem ntau siv nyob rau hauv kev tsim khoom lag luam ntawm cov ntawv thiab cov ntawv nyeem ua cov tuab thiab ua kom zoo dua los txhim kho lub zog thiab cov ntawv zoo. Hauv kev luam ntawv thiab dyeing cov txheej txheem ntawm textiles, cmc tuaj yeem faib cov dyes thiab cov pigments kom ntseeg tau tias niaj hnub puas ntsoog.
3. Kev txhim kho lub tswv yim rau cmc dispersibility
Txhawm rau txhawm rau txhim kho qhov tsis txaus ntseeg ntawm CMC, cov tswv yim ua kom ua tau raws li yuav muaj:
Kho cov molecular hnyav thiab carboxymethylation degree ntawm CMC: Los tswj cov molecular hnyav thiab carboxymethylation degree ntawm cov ntawv thov sib txawv tuaj yeem hloov kho. Piv txwv li, qhov hnyav dua thiab siab dua ntawm carboxymetylation tuaj yeem pab txhim kho qhov tsis txaus ntseeg ntawm CMC hauv kev daws teeb meem aqueous.
Kev siv Surfactants: hauv qee cov ntawv thov, ntxiv ib qho nyiaj tsim nyog ntawm kev sib txawv ntawm cmc, tshwj xeeb tshaj yog thaum ua rau cov roj-dej immiscible immiscibe. Surfactants tuaj yeem txo cov kev cuam tshuam interfacial thiab txhawb nqa lub dispersion ntawm CMC lwg me me.
Ua kom zoo tshaj plaws cov xwm txheej: Kev tswj hwm tsim nyog Piv txwv li, CMC feem ntau zoo dua nyob rau ntawm qhov kub tsawg thiab nruab nrab ntawm nruab nrab.
Sib txuas nrog lwm cov dispersants: hauv qee cov ntawv thov tshwj xeeb, CMC tuaj yeem sib txuas nrog lwm cov neeg dispersants kom ua tiav kev ua kom zoo dua qub. Piv txwv li, qee cov khoom hnyav molecular phaus polymers lossis cov khoom ntuj tuaj yeem ua haujlwm nrog CMC kom txhim kho nws qhov kev tawg.
Carboxymethyl cellulose muaj qhov ua tau zoo heev thiab yog siv dav ua cov tsho tiv no, khoom noj, cov tshuaj, tshuaj pleev ib ce, tshuaj pleev ib yam. Nws qhov kev tawm tsam yog cuam tshuam los ntawm ntau yam xws li molecular hnyav, degree ntawm carboxymethylation, ionic muaj zog thiab kub. Qhov kev tawm tsam ntawm CMC tuaj yeem txhim kho ntxiv los ntawm cov tswv yim tsim nyog ua kom tsim nyog, xws li kev hloov kho molecular hnyav thiab siv surfactants. Raws li cov lag luam xav tau nce ntxiv, CMC's Decentralized kev tshawb fawb yuav txuas mus ntxiv kom tau raws li cov kev xav tau sib txawv ntawm cov kev xav tau sib txawv.
Lub Sijhawm Post: Feb-20-2025