Carboxymethyl cellulose (CMC) tau tom qab Carboxymowylation ntawm cellulose. Nws cov kua aqueous muaj cov haujlwm ntawm thickening, zaj duab xis, thiab lwm yam khoom noj, thiab lwm yam, yog ib qho tseem ceeb tshaj plaws Cellulose urters.natural cellulose yog qhov feem ntau faib tawm thiab feem ntau muaj ntau polysaccharide hauv xwm, thiab nws cov peev txheej tau nplua nuj. Tam sim no hloov kho cov thev naus laus zis ntawm cov cellulose feem ntau yog ethermau thiab esterification. Carboxymethylation yog ib hom ntawm etherilication thev naus laus zis.
Cov Khoom Siv Lub Cev
Sodium Carboxymethyl cellulose (CMC) yog ib qho muaj peev xwm anionic ete, nrog dawb lossis me ntsis tsos mob, tsw, tsis muaj tshuaj lom; Yooj yim soluble hauv dej txias lossis dej kub, sib sau ib qho viscosity ntshiab tov. The solution is neutral or slightly alkaline, insoluble in ethanol, ether, isopropanol, acetone and other organic solvents, soluble in 60% water-containing ethanol or acetone solution. Nws yog hygroscopic, ruaj khov rau lub teeb thiab kub, qhov kev daws teeb meem tsawg dua 2 xyoos, muaj cov dej khov nyob hauv Ph 2, muaj cov pa daus tsawg dua, thiab lub viscosity txo thaum pH yog siab dua 10 Cov. Lub teeb meem kub tsis sib haum yog 227 ℃, cov pa hluav taws kub yog 252 ℃, thiab kev daws teeb meem aqueous yog 71mn / n.
Tshuaj Tshuaj Muaj Zog
Nws tau npaj los ntawm cellulose derivatives ntawm carboxymethyl hloov, kho cellulose nrog soclici cellulose, thiab tom qab ntawd reacting nrog monochloroacetic acid. Cov dej qab zib qab zib ua rau cov pab pawg muaj 3 pab pawg uas tuaj yeem hloov, cov khoom lag luam sib txawv nrog kev hloov pauv tau. Nyob rau nruab nrab, 1 mmol ntawm Carboxymethyl tau qhia rau 1 g ntawm qhuav hnyav, tab sis tuaj yeem yog off moded thiab siv rau ion txauv cov chromatography. Carboxymethyl Pka yog li 4 nyob rau hauv cov dej ntshiab thiab txog 3.5 nyob rau 0.5Mol / l nacl. Nws yog qhov tsis muaj zog acidic cation compress compress thiab feem ntau yog siv rau kev sib cais ntawm nruab nrab thiab cov protein yooj yim ntawm Ph> 4. Ntau tshaj 40% ntawm cov pab pawg hydroxyl tau hloov los ntawm cov pab pawg carboxymethyl, uas tuaj yeem ua kom yaj nyob rau hauv cov dej los ua kom muaj kev ruaj khov siab colloloal tov.
Lub hom phiaj tseem ceeb
Carboxymethyl cellulose (CMC) yog qhov tsis muaj tshuaj lom thiab tsw dawb flocculent hmoov nrog kev ua haujlwm ruaj khov thiab yog yooj yim soluble hauv dej. Nws cov kua aqueous yog qhov nruab nrab lossis alkaline pob tshab viscous kua, soluble hauv lwm cov kua dej-soluble ci ci thiab resins, thiab insoluble. hauv cov kuab tshuaj organic xws li ethanol. CMC tuaj yeem siv tau raws li cov nplaum, cov tuab yaj ntawv, emulsifier, dispersant, stabilizer, sizing tus neeg sawv cev, thiab lwm yam.
Sodium carboxymethyl cellulose (CMC) yog cov khoom siv nrog cov khoom siv tau yooj yim tshaj plaws, feem ntau paub txog "Industrial Monosodium Glutamate".
1. Nws yog siv rau cov roj thiab cov roj nku drilling, zoo khawb thiab lwm yam haujlwm
Cov av nkos muaj CMC tuaj yeem ua kom lub zoo phab ntsa daim ntawv nyias nyias thiab lub forial lim ncuav mog qab zib nrog cov dej qis, uas txo cov dej poob.
② Tom qab ntxiv CMC rau cov av nkos, lub chaw av tau yooj yim tso tawm tau yooj yim rau hauv nws, thiab tib lub sijhawm, cov khib nyiab tau muab pov tseg sai sai rau hauv cov av nkos.
③drilling av nkos, xws li lwm yam kev ncua tsis meej, muaj qee lub sijhawm ntawm kev muaj sia, thiab ntxiv rau ntawm CMC tuaj yeem ua rau nws ruaj khov thiab ntev ntev ntawm lub neej.
Cov av nkos uas muaj CMC yog tsis tshua muaj cuam tshuam los ntawm pwm, yog li nws tsis tsim nyog los tswj tus nqi pH siab thiab siv cov tshuaj txuag.
Aws muaj CMC li Drilling Mud neeg ntxuav cov kuab paug, uas uas tuaj yeem ua cov pa phem ntawm ntau cov ntsev soluble.
Cov av nkos uas muaj CMC muaj qhov ruaj khov zoo thiab tuaj yeem txo cov dej poob txawm tias qhov ntsuas kub nyob sab saud 150 ℃.
CMC nrog cov viscosity siab thiab qib siab ntawm kev ceev, thiab cmc nrog cov viscosity tsawg dua yog tsim nyog rau cov av nkos nrog siab ntom ntom ntom. Kev xaiv ntawm CMC yuav tsum txiav txim siab raws li cov xwm txheej sib txawv xws li cov hom av nkos, thaj av thiab qhov tob tob.
2. Siv rau hauv Textile, Luam Ntawv thiab Dyeing kev lag luam. Kev lag luam Textile siv CMC ua tus neeg sawv cev Sizing rau lub teeb cov xov paj sizing ntawm paj rwb, cov ntaub ntawv luv, sib xyaw thiab lwm yam khoom siv muaj zog;
3. Siv hauv cov ntawv lag luam CMC tuaj yeem siv tau ua ntawv saum npoo smoothing tus neeg sawv cev thiab cov neeg sawv cev ntawm cov ntawv lag luam. Ntxiv 0.1% rau 0.3% CMC mus rau lub sam thiaj tuaj yeem txhim kho lub zog tensile ntawm daim ntawv los ntawm 50%, nce qhov kneadability los ntawm 4 txog 5 zaug.
4. CMC tuaj yeem siv los ua cov av adsorbent thaum ntxiv rau cov hluavtaws hluav taws xob; Cov tshuaj txhua hnub xws li cov tshuaj txhuam hniav nrog kev lag luam CMC Glycerin aqueous kev daws yog siv los ua cov pos hniav siv tshuaj txhuam hniav; Kws Tshuaj Kev Lag Luam yog siv los ua cov tuab thiab emulsifier; CMC aqueous daws yog thickened thiab siv rau ntab cov ntxhia ua, thiab lwm yam.
5. Hauv kev lag luam ceramic, nws tuaj yeem siv ua cov nplaum, yas, cov neeg sawv cev rau cov gluaze, xim kho tus neeg sawv cev, thiab lwm yam.
6. Siv hauv kev tsim kho kom txhim kho cov dej tuav cia thiab lub zog
7. Nws yog siv hauv kev lag luam khoom noj. Cov khoom noj khoom haus siv cov khoom noj cmc nrog cov dej siab dua raws li cov zaub mov hauv cov kaus poom, thiab ua npuas ncauj noj, thiab lwm yam khoom noj, thiab lwm yam.
8. Lub tshuaj ntsuam kev xaiv hu ua CMC nrog cov viscosity uas tsim nyog raws li cov ntsiav tshuaj nrog cov ntsiav tshuaj, thiab cov neeg sawv cev rau kev ncua.
Lub Sijhawm Post: NOV-03-2022