I-Sodium Carboxymethyl Cellulose | 9000-11-7

I-Carboxy methyl cellulose (CMC) noma i-cellulose gum iphuma ku-cellulose enamaqembu e-carboxymethyl (-CH2-COOH) eboshelwe kwamanye amaqembu e-hydroxyl we-glucopyranose monomers akha umgogodla we-cellulose. Ivame ukusetshenziswa njengosawoti wayo we-sodium, i-sodium carboxymethyl cellulose.

Ihlanganiswa ukusabela kwe-alkali-catalyzed ye-cellulose nge-chloroacetic acid. Amaqembu e-polar (organic acid) carboxyl enza i-cellulose inyibilike futhi isebenze ngamakhemikhali. Izakhiwo zokusebenza ze-CMC zincike ezingeni lokushintshwa kwesakhiwo se-cellulose (okungukuthi, mangaki amaqembu e-hydroxyl abambe iqhaza ekuphenduleni esikhundleni), kanye nobude beketango lesakhiwo somgogodla we-cellulose kanye nezinga lokuhlanganisa izingxenye ze-carboxymethyl.

I-UsesCMC isetshenziswa kusayensi yokudla njenge-viscosity modifier noma i-thickener, kanye nokusimamisa ama-emulsions emikhiqizweni ehlukahlukene kufaka phakathi u-ayisikhilimu. Njengesengezo sokudla, inenombolo E466. Iphinde ibe ingxenye yemikhiqizo eminingi engeyona eyokudla, efana ne-KY Jelly, umuthi wokuxubha amazinyo, ama-laxatives, amaphilisi okudla, opende abasuselwe emanzini, okokuhlanza, ukulinganisa kwezindwangu kanye nemikhiqizo yamaphepha eyahlukene. Isetshenziswa ngokuyinhloko ngoba ine-viscosity ephezulu, ayinabo ubuthi, futhi iyi-hypoallergenic. Ezihlahleni zokuwasha isetshenziswa njenge-polymer yokumisa inhlabathi eklanyelwe ukufaka ukotini nezinye izindwangu ze-cellulosic edala umgoqo okhokhiswa kabi enhlabathini esixazululweni sokugeza. I-CMC isetshenziswa njengesithambiso kumathonsi esweni angaguquguquki (izinyembezi zokwenziwa). Kwesinye isikhathi i-methyl cellulose (MC) esetshenziswayo, kodwa amaqembu ayo e-non-polar methyl (-CH3) awafaki noma yikuphi ukuncibilika noma ukuphinda kusebenze kwamakhemikhali ku-base cellulose.

Ukulandela ukusabela kokuqala ingxube ewumphumela ikhiqiza cishe u-60% CMC kanye no-40% kasawoti (i-sodium chloride ne-sodium glycolate). Lo mkhiqizo yilokho okubizwa ngokuthi i-Technical CMC esetshenziswa ezintweni zokuhlanza. Enye inqubo yokuhlanza isetshenziselwa ukususa lawa sawoti ukuze kukhiqizwe i-CMC emsulwa esetshenziselwa izinhlelo zokudla, imithi kanye ne-dentifrice (i-toothpaste). Ibanga eliphakathi nendawo elithi "semi-purified" liyakhiqizwa, elivame ukusetshenziswa ekufakweni kwephepha.

I-CMC iphinde isetshenziswe kwezemithi njenge-ejenti yokuqina. I-CMC iphinde isetshenziswe embonini yokumba uwoyela njengesithako sokumba udaka, lapho isebenza njengesishintshi se-viscosity kanye ne-ejenti yokugcina amanzi. I-Poly-anionic cellulose noma i-PAC itholakala ku-cellulose futhi iphinde isetshenziswe emisebenzini yase-oilfield. I-CMC impela iyi-Carboxylic Acid, lapho i-PAC ingu-Ether. I-CMC kanye ne-PAC, nakuba enziwa ngezinto zokusetshenziswa ezifanayo (i-cellulose, inani kanye nohlobo lwezinto ezisetshenziswayo kuholela emikhiqizweni ehlukene yokugcina. Umehluko wokuqala kanye noholayo phakathi kwe-CMC ne-PAC ukhona esinyathelweni se-radicalization. I-CarboxyMethyl Cellulose (CMC) kokubili ngamakhemikhali futhi ihluke ngokomzimba ku-Polyanionic Cellulose.

I-insoluble microgranular carboxymethyl cellulose isetshenziswa njenge-cation-exchange resin ku-ion-exchange chromatography ukuze kuhlanzwe Amaprotheni.Kucatshangwa ukuthi izinga lokuphuma liphansi kakhulu ukuze izici zokuncibilika ze-microgranular cellulose zigcinwe kuyilapho kwengezwa amaqembu anele e-carboxylate ashajiwe anele ukuze kuhlanganiswe kahle. amaprotheni akhokhisiwe.

I-CMC iphinde isetshenziswe kumaphakethe eqhwa ukuze yakhe ingxube ye-eutectic eholela endaweni yokuqandisa ephansi futhi ngenxa yalokho umthamo wokupholisa owengeziwe kuneqhwa.

I-CMC yezixazululo ezinamanzi nayo isetshenziselwe ukuhlakaza ama-carbon nanotubes. Kucatshangwa ukuthi ama-molecule amade e-CMC azungeze ama-nanotubes, awavumele ukuthi ahlakazeke emanzini.

I-EnzymologyCMC iphinde yasetshenziswa kakhulu ukukhombisa umsebenzi we-enzyme evela kuma-endoglucanase (ingxenye ye-cellulase complex). I-CMC iyi-substrate ecaciswe kakhulu yama-endo-acting cellulases njengoba ukwakheka kwayo kuklanyelwe ukukhipha i-cellulose futhi kwakhiwe amasayithi a-amorphous alungele isenzo se-endglucanase. I-CMC iyathandeka ngoba umkhiqizo we-catalysis (i-glucose) ulinganiswa kalula kusetshenziswa i-assay yokunciphisa ushukela efana ne-3,5-Dinitrosalicylic acid. Ukusebenzisa i-CMC ekuhlolweni kwama-enzyme kubaluleke kakhulu mayelana nokuhlolwa kwama-enzyme e-cellulase adingekayo ekuguquleni i-cellulosic ethanol esebenza kahle kakhulu. Kodwa-ke, i-CMC iphinde yasetshenziswa kabi emsebenzini wangaphambili nama-enzyme e-cellulase njengoba abaningi babehlobanise umsebenzi we-cellulase wonke ne-CMC hydrolysis. Njengoba indlela yokwenziwa kwe-cellulose depolymerization isiqondakala kakhudlwana, kufanele kuqashelwe ukuthi ama-exo-celllulase abusa ekonakalisweni kwekristale (isb. i-Avicel) futhi engancibiliki (isb. CMC) i-cellulose.