Sodium Carboxymethyl Cellulose | 9000-11-7 : kuv

Carboxy methyl cellulose (CMC) los yog cellulose gum yog cellulose derivative nrog carboxymethyl pawg (-CH2-COOH) khi rau qee pawg hydroxyl ntawm glucopyranose monomers uas ua rau cov pob txha cellulose. Nws yog feem ntau siv raws li nws cov ntsev ntsev, sodium carboxymethyl cellulose.

Nws yog synthesized los ntawm alkali-catalyzed cov tshuaj tiv thaiv ntawm cellulose nrog chloroacetic acid. Cov polar (organic acid) carboxyl pawg ua rau cellulose soluble thiab chemically reactive. Cov khoom ua haujlwm ntawm CMC nyob ntawm seb qhov kev hloov pauv ntawm cov qauv cellulose (piv txwv li, pes tsawg ntawm pawg hydroxyl tau koom nrog hauv kev hloov pauv cov tshuaj tiv thaiv), nrog rau cov saw ntev ntawm cov qauv cellulose qaum thiab qib ntawm pawg. carboxymethyl substituents.

UsesCMC yog siv nyob rau hauv kev tshawb fawb txog zaub mov raws li viscosity modifier los yog thickener, thiab kom stabilize emulsions nyob rau hauv ntau yam khoom xws li ice cream. Raws li cov khoom noj ntxiv, nws muaj E tus lej E466. Nws kuj yog ib qho ntawm ntau yam khoom uas tsis yog khoom noj, xws li KY Jelly, tshuaj txhuam hniav, laxatives, tshuaj noj, tshuaj pleev xim dej, tshuaj ntxuav tes, textile sizing thiab ntau yam khoom siv ntawv. Nws yog siv feem ntau vim nws muaj viscosity siab, tsis muaj tshuaj lom, thiab yog hypoallergenic. Hauv cov tshuaj ntxhua khaub ncaws nws yog siv los ua cov av ncua kev kawm polymer tsim los tso rau hauv paj rwb thiab lwm yam cellulosic fabrics tsim ib qho kev cuam tshuam tsis zoo rau cov av hauv cov tshuaj ntxuav. CMC yog siv los ua cov roj nplua nyeem hauv cov kua muag uas tsis yog-volatile (cov kua muag cuav). Qee lub sij hawm nws yog methyl cellulose (MC) uas yog siv, tab sis nws cov non-polar methyl pawg (-CH3) tsis ntxiv cov solubility los yog tshuaj reactivity rau lub hauv paus cellulose.

Tom qab cov tshuaj tiv thaiv thawj zaug, qhov sib xyaw ua ke ua rau kwv yees li 60% CMC ntxiv rau 40% ntsev (sodium chloride thiab sodium glycolate). Cov khoom no yog lub npe hu ua Technical CMC uas yog siv rau hauv detergents. Cov txheej txheem purification ntxiv yog siv los tshem tawm cov ntsev no los tsim cov ntshiab CMC uas yog siv rau cov khoom noj khoom haus, tshuaj thiab dentifrice (cov tshuaj txhuam hniav). Ib qib nrab "semi-purified" kuj yog tsim, feem ntau yog siv rau hauv daim ntawv thov.

CMC kuj tseem siv tau rau hauv cov tshuaj ua cov tshuaj thickening. CMC kuj tseem siv rau hauv kev lag luam roj drilling los ua cov khoom siv ntawm cov av nkos, qhov uas nws ua raws li kev hloov kho viscosity thiab dej tuav tus neeg sawv cev. Poly-anionic cellulose los yog PAC yog muab los ntawm cellulose thiab kuj siv nyob rau hauv oilfield xyaum. CMC yog qhov tseeb Carboxylic Acid, qhov twg PAC yog Ether. CMC thiab PAC, txawm hais tias lawv yog tsim los ntawm tib yam raw cov ntaub ntawv (cellulose, npaum li cas thiab hom ntawm cov ntaub ntawv siv leads sib txawv cov khoom kawg. Thawj thiab cov kev sib txawv ntawm CMC thiab PAC muaj nyob rau hauv radicalization kauj ruam. CarboxyMethyl Cellulose (CMC) yog ob qho tib si tshuaj thiab Lub cev txawv ntawm Polyanionic Cellulose.

Insoluble microgranular carboxymethyl cellulose yog siv los ua cation-exchange resin nyob rau hauv ion-exchange chromatography rau purification ntawm Proteins.Txawm tias theem ntawm derivatization qis dua kom cov khoom solubility ntawm microgranular cellulose khaws cia thaum ntxiv cov pab pawg tsis zoo carboxylate los khi zoo. them cov protein.

CMC kuj tseem siv rau hauv cov pob khov nab kuab los tsim cov eutectic sib tov uas ua rau qis qis qis thiab yog li ntawd muaj peev xwm txias dua li dej khov.

Aqueous daws CMC kuj tau siv los faib cov pa roj carbon nanotubes. Nws yog xav tias ntev CMC molecules qhwv nyob ib ncig ntawm lub nanotubes, tso cai rau lawv mus dispersed nyob rau hauv dej.

EnzymologyCMC kuj tau siv dav los ua tus yam ntxwv ntawm kev ua enzyme los ntawm endoglucanases (ib feem ntawm cellulase complex). CMC yog ib qho tshwj xeeb substrate rau endo-acting cellulases raws li nws cov qauv tau raug tsim los rau decrystallize cellulose thiab tsim amorphous qhov chaw uas zoo tagnrho rau endglucanase nkaus. CMC yog qhov xav tau vim tias cov khoom lag luam catalysis (qabzib) tau yooj yim ntsuas los ntawm kev txo cov piam thaj xws li 3,5-Dinitrosalicylic acid. Kev siv CMC hauv kev soj ntsuam enzyme yog qhov tseem ceeb tshwj xeeb hauv kev soj ntsuam rau cellulase enzymes uas xav tau rau kev hloov pauv cellulosic ethanol ntau dua. Txawm li cas los xij, CMC kuj tau siv tsis raug hauv kev ua haujlwm ua ntej nrog cellulase enzymes raws li ntau tau cuam tshuam tag nrho cov haujlwm cellulase nrog CMC hydrolysis. Raws li cov txheej txheem ntawm cellulose depolymerization tau nkag siab ntau dua, nws yuav tsum raug sau tseg tias exo-cellulases yog qhov tseem ceeb hauv kev degradation ntawm crystalline (xws li Avicel) thiab tsis soluble (xws li CMC) cellulose.