Sodium Carboxymethyl Cellulose | 9000-11-7

I-Carboxy methyl cellulose (CMC) okanye i-cellulose gum yi-cellulose derivative enamaqela e-carboxymethyl (-CH2-COOH) ebotshelelwe kwamanye amaqela e-hydroxyl e-glucopyranose monomers eyenza i-cellulose backbone. Ihlala isetyenziswa njengetyuwa yesodium, i-sodium carboxymethyl cellulose.

Yenziwa yi-alkali-catalyzed reaction of cellulose kunye ne-chloroacetic acid. Amaqela e-polar (organic acid) e-carboxyl anika i-cellulose ukunyibilika kunye nokusebenza kweekhemikhali. Iimpawu ezisebenzayo ze-CMC zixhomekeke kwiqondo lokutshintshwa kwesakhiwo seselulosi (oko kukuthi, mangaphi amaqela e-hydroxyl athathe inxaxheba ekuphenduleni ukutshintshwa), kunye nobude bekhonkco lesakhiwo se-cellulose backbone kunye neqondo lokuhlanganisana. izinto ezithatha indawo ye-carboxymethyl.

I-UsesCMC isetyenziswa kwisayensi yokutya njenge-viscosity modifier okanye i-thickener, kunye nokuzinzisa i-emulsions kwiimveliso ezahlukeneyo kubandakanya i-ayisikrimu. Njengesongezo sokutya, inenombolo ye-E466. Ikwayinxalenye yeemveliso ezininzi ezingezizo ukutya, ezifana ne-KY Jelly, intlama yamazinyo, i-laxatives, iipilisi zedayethi, ipeyinti esekwe emanzini, izicoci, iisayingi yelaphu kunye neemveliso zamaphepha ezahlukeneyo. Isetyenziswe ngokuyinhloko kuba ine-viscosity ephezulu, ayinayo ityhefu, kwaye i-hypoallergenic. Kwizinto zokuhlamba iimpahla kusetyenziswa njengepolima yokunqunyanyiswa komhlaba eyenzelwe ukufaka idiphozithi kumqhaphu kunye namanye amalaphu e-cellulosic edala umqobo ohlawuliswa kakubi kumhlaba okwisisombululo sokuhlamba. I-CMC isetyenziswa njenge-lubricant kumathontsi eliso angaguquguqukiyo (iinyembezi zokwenziwa). Ngamanye amaxesha i-methyl cellulose (MC) esetyenziswayo, kodwa amaqela ayo e-non-polar methyl (-CH3) awafaki nayiphi na i-solubility okanye i-chemical reactivity kwisiseko se-cellulose.

Ukulandela impendulo yokuqala umxube wesiphumo uvelisa malunga ne-60% yeCMC kunye ne-40% yeetyuwa (i-sodium chloride kunye ne-sodium glycolate). Le mveliso yinto ebizwa ngokuba yi-Technical CMC esetyenziswa kwizinto zokucoca. Inkqubo eyongezelelweyo yokucoca isetyenziselwa ukususa ezi tyuwa ukuvelisa i-CMC ecocekileyo esetyenziselwa ukutya, amayeza kunye ne-dentifrice (i-toothpaste) izicelo. Kukwaveliswa ibakala "semi-purified" eliphakathi, elidla ngokusetyenziswa xa kufakwa amaphepha.

I-CMC ikwasetyenziswa kumayeza njenge-arhente etyebisayo. I-CMC ikwasetyenziswa kushishino lokwemba i-oyile njengesithako sokugrumba udaka, apho isebenza njenge-viscosity modifier kunye ne-arhente yokugcina amanzi. I-Poly-anionic cellulose okanye i-PAC ithathwe kwi-cellulose kwaye iphinda isetyenziswe kwi-oilfield practice. I-CMC ngokuqinisekileyo i-Carboxylic Acid, apho i-PAC i-Ether. I-CMC kunye ne-PAC, nangona zenziwe ngezinto ezifanayo ekrwada (iselulosi, isixa kunye nodidi lwezixhobo ezisetyenziswayo zikhokelela kwiimveliso ezahlukeneyo zokugqibela. Umahluko wokuqala kunye nophambili phakathi kweCMC kunye nePAC zikhona kwinyathelo le-radicalization. ICarboxyMethyl Cellulose (CMC) yomibini ngokwemichiza kwaye ngokwasemzimbeni bahluke kwi-Polyanionic Cellulose.

I-insoluble microgranular carboxymethyl cellulose isetyenziswa njenge-cation-exchange resin kwi-ion-exchange chromatography yokuhlanjululwa kweeProtein.Kuqikelelwa ukuba inqanaba le-derivatization lisezantsi kakhulu ukuze iipropati ze-solubility ze-microgranular cellulose zigcinwe ngelixa zongeza amaqela aneleyo e-carboxylate ahlawulisiweyo ukuba abophe kakuhle. iiproteni ezihlawulisiweyo.

I-CMC ikwasetyenziswa kwiipakethe zomkhenkce ukwenza umxube we-eutectic okhokelela kwindawo esezantsi yokukhenkceza ngoko ke umthamo wokupholisa ongaphezulu kunomkhenkce.

Izisombululo ezinamanzi i-CMC nazo zisetyenzisiwe ukusasaza i-carbon nanotubes. Kucingelwa ukuba iimolekyuli ezinde ze-CMC zijikeleze i-nanotubes, zivumela ukuba zisasazwe emanzini.

I-EnzymologyCMC iye yasetyenziswa kakhulu ukubonisa umsebenzi we-enzyme evela kwi-endoglucanases (inxalenye ye-cellulase complex). I-CMC yinkqutyana ecacileyo kakhulu yeeseli ze-endo-acting njengoko ubume bayo benziwe ubunjineli bokwenza i-cellulose ibe yikristale kunye nokudala iisayithi ze-amorphous ezifanelekileyo kwisenzo se-endglucanase. I-CMC iyanqweneleka ngenxa yokuba imveliso ye-catalysis (i-glucose) ilinganiswa ngokulula usebenzisa i-sugar assay yokunciphisa njenge-3,5-Dinitrosalicylic acid. Ukusebenzisa i-CMC kwiimvavanyo ze-enzyme kubaluleke ngakumbi malunga nokuhlolwa kwee-enzymes ze-cellulase ezifunekayo ukuguqulwa kwe-cellulosic ethanol esebenzayo ngakumbi. Nangona kunjalo, i-CMC isetyenziswe gwenxa kumsebenzi wangaphambili kunye ne-cellulase enzymes njengoko abaninzi beyamanise umsebenzi we-cellulase kunye ne-CMC hydrolysis. Njengoko indlela ye-cellulose depolymerization iye yaqondwa ngakumbi, kufuneka kuqatshelwe ukuba iiseli ze-exo zilawula ukuthotywa kwekristale (umz. i-Avicel) kwaye inganyibiliki (umz. i-CMC) i-cellulose.