Carboxymethyl cellulose agar

Cellulose yog qhov feem ntau faib tshaj plaws thiab muaj ntau polysaccharide hauv xwm, thiab nws qhov chaw muaj ntau heev. Tam sim no hloov kho cov thev naus laus zis ntawm cov cellulose feem ntau yog ethermau thiab esterification. Carboxymethylation cov tshuaj tiv thaiv yog ib hom ntawm etherilication thev naus laus zis. Tom qab carboxymethylation ntawm cellulose, carboxymethyl cellulose (cmc) tau txais. Nws cov kev daws teeb meem aqueous muaj cov haujlwm ntawm thickening, zaj duab xis, noo noo khaws cia, kev tiv thaiv colloid, emulsification thiab ncua kev tiv thaiv. Nws yog dav siv hauv roj av, khoom noj, cov tshuaj, textile thiab papermaking kev lag luam, thiab yog ib qho ntawm cov kws ua haujlwm cellulose tshaj plaws.

Carboxymethyl cellulose (CMC) belongs rau anionic cellulose muaj kev muaj cai. Nws yog dawb lossis me ntsis daj flocculent fiber ntau hmoov lossis hmoov dawb. Nws yog tsis muaj ntxhiab thiab tsis muaj tshuaj lom. Nws yog yooj yim soluble nyob rau hauv txias lossis dej kub kom tsim cov tshuaj ntsuab nrog qee yam viscosity. Kev daws teeb meem yog nruab nrab lossis me ntsis alkaline. Nws yog insoluble hauv cov kuab tshuaj muaj zog xws li ethanol, ethanol, acetone, thiab lwm yam nyob hauv ethanol los yog acetone daws teeb meem muaj 60% dej. Nws yog hygroscopic thiab ruaj khov rau lub teeb thiab kub. Lub viscosity txo nrog nce kub. Cov kev daws teeb meem yog ruaj khov ntawm Ph 2-10. Thaum lub p yog qis dua 2, drated precipitate. Thaum lub pH yog siab tshaj 10, lub viscosity txo. Cov xim hloov kub yog 227 degree, cov carbonization kub yog 252 degree, thiab lub nras muaj kev ntxhov siab ntawm 21mn / n.

It is a cellulose derivative with carboxymethyl substituents. Cellulose is treated with sodium hydroxide to form alkali cellulose, which is then reacted with monochloroacetic acid. The glucose unit that constitutes cellulose has 3 hydroxyl groups that can be replaced, so products with different degrees of replacement can be obtained. Those with an average of 1 mmol of carboxymethyl introduced per 1g of dry weight are insoluble in water and dilute acid, but can swell and are used for ion exchange chromatography. The pKa of carboxymethyl is about 4 in pure water and about 3.5 in 0.5mol/L NaCl. It is a weakly acidic cation exchanger and is usually used for the separation of neutral and alkaline proteins at pH>4. Cov neeg uas muaj ntau dua 40% ntawm cov pab pawg hydroxyl hloov los ntawm Carboxymethyl tuaj yeem ua rau muaj dej khov kho cov tshuaj khov kho.

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. Nws yog soluble hauv lwm cov dej-soluble ci thiab cov resins, tab sis insoluble hauv cov kuab tshuaj ethanol. CMC tuaj yeem siv tau ua cov nplaum, cov ntaub ntawv txo qis, emulsifier, dispersant, stabilizer, sizing tus neeg sawv cev, thiab lwm yam.

Carboxymethyl cellulose (CMC) yog cov khoom lag luam nrog cov khoom tawm loj tshaj plaws, cov cuab yeej siv dav dav ntawm cov neeg hais txog cellulos. Nws yog feem ntau hu ua "Industrial MSG".

1. Siv hauv cov roj thiab roj av drilling, zoo khawb thiab lwm yam haujlwm

① Cov av nkos muaj CMC tuaj yeem ua ib lub ncuav mog qab zib nyias thiab tawv tawv lim nrog cov khoom muaj sia qis ntawm phab ntsa, txo cov dej poob.

② Tom qab ntxiv CMC mus rau cov av nkos, lub tshuab khiav tawm tau yooj yim rau hauv nws, thiab tib lub sijhawm sai abbris hauv av nkos.
③ Qhov chaw av nkos, zoo li lwm cov neeg raug tshem tawm, muaj qee lub sijhawm muaj sia nyob. Ntxiv CMC tuaj yeem ua rau nws ruaj khov thiab ntev nws lub sijhawm muaj.
④ Cov av nkos muaj cov CMC tsis tshua cuam tshuam los ntawm pwm, yog li nws tsis tsim nyog los tswj hwm tus nqi pH siab lossis siv cov tshuaj txuag.
⑤ CMC yog siv los ua cov av nkos ntxuav cov neeg sawv cev ua kom tsis txhob muaj kuab paug los ntawm ntau cov ntsev ua paug.
⑥ Cov av nkos muaj CMC muaj kev ruaj khov zoo thiab tuaj yeem txo cov dej poob txawm nyob ntawm qhov kub siab tshaj 150 degree.
CMC nrog cov viscosity siab thiab siab hloov℃yog tsim nyog rau cov av nkos nrog qis viscosity thiab kev hloov pauv siab yog tsim nyog rau cov av nkos nrog siab ntom. Kev xaiv CMC yuav tsum txiav txim siab raws li cov xwm txheej sib txawv xws li hom av nkos, thaj av, thiab qhov tob tob.
2. Siv rau hauv textile thiab luam ntawv thiab dyeing kev lag luam. Kev lag luam Textile siv CMC ua tus sawv cev Sizing rau cov xov paj lub teeb
3. Siv hauv kev lag luam papermaking. CMC tuaj yeem siv los ua ib daim ntawv saum npoo smoothing tus neeg saib xyuas thiab cov neeg sawv cev rau cov neeg sawv cev hauv lub papermaking. Ntxiv 0.1% rau 0.3% CMC mus rau cov kuam quav muaj peev xwm nce cov ntawv sib nraus tiv thaiv tau los ntawm 50%, thiab nce kneading cuab yeej 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 CMC Glycerol Aqueous kev daws yog siv los ntawm cov tshuaj txhuam hniav ntawm cov pos hniav; Kws Tshuaj Kev Lag Luam yog siv los ua cov tuab thiab emulsifier; CMC aqueous daws tau siv raws li cov flotation resulliciation tom qab viscosity nce.
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6. Siv hauv kev tsim kho kom txhim kho cov dej tuav cia thiab lub zog
7. Siv hauv kev lag luam khoom noj. Cov khoom noj khoom haus siv tau cov khoom siv ua kom huv, thiab cov npuaj teg, cov txiv hmab txiv ntoo lwg, khoom noj txom ncauj, khoom noj txom ncauj, mis nyuj khov, mis nyuj khov, mis nyuj khov, mis nyuj khov, mis nyuj khov, mis nyuj khov, mis.
8. Lub tshuaj kev lag luam xaiv CMC nrog cov viscosity uas tsim nyog raws li cov phau ntawv thiab ua tsis taus rau cov ntsiav tshuaj, tus neeg xiam oob khab rau kev txwv, thiab lwm yam.

Cov khoom no yuav tsum tau muab cia rau hauv qhov chaw cua thiab qhuav.

Nws yuav tsum tau tiv thaiv los ntawm nag thaum caij tsheb thauj mus los, thiab hlau cuam txwv tsis pub thauj khoom rau kev thau khoom thiab thau khoom. Cov khoom no yuav clump thaum unacked vim mus ntev cia thiab kev sib koom, uas yuav ua rau tsis muaj qhov siv tau tab sis yuav tsis cuam tshuam rau qhov zoo.

Cov khoom no raug txwv tsis pub muaj kev sib cuag nrog cov dej thaum lub sijhawm cia dej thaum lub sijhawm cia, txwv tsis pub nws cov gel lossis ib nrab thiab tsis siv tau.

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