Carboxymethyl cellulose (cmc)

Carboxymethyl cellulose yog synthesized los ntawm cov alkali-catalyzed tshuaj tiv thaiv ntawm cellulose nrog chloroacetic acid.^[3]Cov Ncauj Qaum (organic acid) Carboxyl pab pawg render lub cellulose soluble thiab chemically reactive. Cov ntaub ua los ntawm cellulose - piv txwv li, paj rwb lossis viscose (rayon) - tej zaum kuj hloov mus rau CMC.

Ua raws li thawj cov tshuaj tiv thaiv, cov kev sib tov sib xyaw ua ke kwv yees li 60% cmc thiab 40% ntsev tov (sodium chloride thiab sodium glycolate). Cov khoom no, hu ua kev ua si CMC, yog siv hauv cov xab npum.^{[citation xav tau]}Ib txheej txheem purification ntxiv yog siv los tshem cov ntsev kom ua cov ntaub ntawv ntshiab, uas yog siv rau cov khoom noj thiab cov tshuaj siv tshuaj. Qib theem nrab 'ib nrab qib' yog tsim, uas yog feem ntau siv nyob rau hauv cov ntawv thov xws li rov kho dua cov ntaub ntawv qub.

CMC yog cov hmoov dawb lossis maj mam daj uas tsis muaj ntxhiab tsw, tsw, lossis cov tshuaj lom. Nws yog hygroscopic thiab yaj tau zoo nyob rau hauv dej kub lossis dej txias, sib sau ua kua tsis muaj kuab. Nws tsis yog soluble hauv cov kuab tshuaj organic zoo li methanol, ethanol, acetone, chloroform, thiab benzene. Cov teeb tsa ua haujlwm ntawm CMC yog nyob ntawm cov qib ntawm cov qauv cellulose (piv txwv li ntau ntawm cov kab mob cellulose ntawm cov carboxymethyl hloov chaw. Nws yog ib qho siv tau siv viscosity concifiever lossis thickener thiab kom ruaj khov emulsions hauv ntau yam khoom, ob qho khoom noj thiab cov khoom noj uas tsis muaj txiaj ntsig. Nws yog tsuas yog siv vim tias nws muaj lub viscosity siab, yog nontoxic, thiab feem ntau suav hais tias yog hypoallergenic.

 

 

Peb Cov Khoom

 

 

 

 

 

Cim npe nrov: Carboxymethyl cellulose (CMC), Tuam Tshoj Tuam Tshoj Carboxymethyl cellulose (CMC) Cov Chaw Tsim Tshuaj, Chaw Tsim Tshuaj, Hoobkas