Sodium Carboxymethyl Cellulose | 9000-11-7

Carboxy methyl cellulose (CMC) kapa selulose gum ke motsoako oa cellulose o nang le lihlopha tsa carboxymethyl (-CH2-COOH) tse hokahaneng ho tse ling tsa lihlopha tsa hydroxyl tsa glucopyranose monomers tse etsang mokokotlo oa cellulose. Hangata e sebelisoa e le letsoai la sodium, sodium carboxymethyl cellulose.

E entsoe ke karabelo ea alkali-catalyzed ea cellulose ka chloroacetic acid. Lihlopha tsa polar (organic acid) carboxyl li etsa hore selulose e qhibilihe 'me e sebetse ka lik'hemik'hale. Thepa e sebetsang ea CMC e itšetlehile ka tekanyo ea ho nkela sebaka sa cellulose (ke hore, ke lihlopha tse kae tsa hydroxyl tse nkileng karolo molemong oa ho fetola), hammoho le bolelele ba ketane ea sebopeho sa mokokotlo oa cellulose le tekanyo ea ho kopanya likarolo tse ling tsa carboxymethyl.

UsesCMC e sebelisoa ho mahlale a lijo joalo ka mofetoleli oa viscosity kapa thickener, le ho tsitsisa li-emulsions lihlahisoa tse fapaneng ho kenyeletsoa ice cream. E le tlatsetso ea lijo, e na le nomoro ea E466. Hape ke karolo ea lihlahisoa tse ngata tseo e seng tsa lijo, joalo ka KY Jelly, sesepa sa meno, li-laxatives, lipilisi tsa lijo, lipente tse thehiloeng metsing, lihlapa, boholo ba masela le lihlahisoa tse fapaneng tsa pampiri. E sebelisoa haholo-holo hobane e na le viscosity e phahameng, ha e na chefo, 'me ke hypoallergenic. Litlhatsoetsong tsa ho hlatsoetsa liaparo li sebelisoa e le polymer e emisang mobu e etselitsoeng ho kenya k'hothone le masela a mang a cellulosic ho theha tšitiso e qosoang hampe ho mobu o ka har'a tharollo ea ho hlatsoa. CMC e sebelisoa e le setlolo sa marotholi a mahlo a sa fetoheng (meokho ea maiketsetso). Ka linako tse ling ke methyl cellulose (MC) e sebelisoang, empa lihlopha tsa eona tsa non-polar methyl (-CH3) ha li kenyelle ho solubility kapa lik'hemik'hale ho cellulose ea motheo.

Ka mor'a karabelo ea pele motsoako o hlahisoang o hlahisa hoo e ka bang 60% CMC hammoho le 40% ea letsoai (sodium chloride le sodium glycolate). Sehlahisoa sena ke seo ho thoeng ke Technical CMC e sebelisoang ka li-detergents. Mokhoa o mong oa tlhoekiso o sebelisoa ho tlosa matsoai ana ho hlahisa CMC e hloekileng e sebelisetsoang lijo, meriana le li-dentifrice (sesepa sa meno). Ho boetse ho hlahisoa kereiti ea "semi-purified" e mahareng, hangata e sebelisoang lits'ebetsong tsa pampiri.

CMC e boetse e sebelisoa litlhare tsa meriana e le ntho e matlafatsang. CMC e boetse e sebelisoa indastering ea ho cheka oli e le motsoako oa seretse sa ho cheka, moo e sebetsang e le sesebelisoa sa viscosity le se bolokang metsi. Poly-anionic cellulose kapa PAC e tsoa ho selulose hape e sebelisoa ts'ebetsong ea oli. Ka sebele CMC ke Carboxylic Acid, moo PAC e leng Ether. CMC le PAC, le hoja li entsoe ka thepa e tala e tšoanang (selulose, palo le mofuta oa thepa e sebelisoang e lebisa lihlahisoa tse fapaneng tsa ho qetela. Phapang ea pele le e ka sehloohong pakeng tsa CMC le PAC e teng ka mohato oa radicalization. CarboxyMethyl Cellulose (CMC) ke lik'hemik'hale le 'mele o fapane le Polyanionic Cellulose.

Insoluble microgranular carboxymethyl cellulose e sebelisoa e le cation-exchange resin ho ion-exchange chromatography bakeng sa tlhoekiso ea Protheine. Ho ka etsahala hore ebe boemo ba derivatization bo tlase haholo e le hore thepa ea ho qhibiliha ea cellulose ea microgranular e bolokoe ha e ntse e eketsa lihlopha tse lekaneng tsa carboxylate tse lekaneng ho tlamahane hantle. liprotheine tse qosoang.

CMC e boetse e sebelisoa ka har'a mekotla ea leqhoa ho etsa motsoako oa eutectic o hlahisang sebaka se tlase sa leqhoa 'me kahoo matla a ho pholisa ho feta leqhoa.

Litharollo tsa metsi CMC le tsona li se li sebelisitsoe ho qhala khabone nanotubes. Ho nahanoa hore limolek'hule tse telele tsa CMC li pota-potile li-nanotubes, li li lumella hore li hasane ka metsing.

EnzymologyCMC e boetse e sebelisitsoe haholo ho tšoaea tšebetso ea enzyme ho tsoa ho endoglucanase (karolo ea cellulase complex). CMC ke setsi se ikhethileng haholo bakeng sa li-cellulase tse sebetsang hantle kaha sebopeho sa eona se entsoe ho tlosa selulose le ho theha libaka tsa amorphous tse loketseng ketso ea endglucanase. CMC ea lakatseha hobane sehlahisoa sa catalysis (glucose) se lekantsoe habonolo ho sebelisoa tlhahlobo e fokotsang ea tsoekere joalo ka 3,5-Dinitrosalicylic acid. Ho sebelisa CMC litekong tsa enzyme ho bohlokoa haholo mabapi le tlhahlobo ea li-enzyme tsa cellulase tse hlokahalang bakeng sa phetoho e sebetsang haholoanyane ea cellulosic ethanol. Leha ho le joalo, CMC e boetse e sebelisitsoe hampe mosebetsing oa pejana ka li-enzyme tsa cellulase kaha ba bangata ba ne ba amahanya ts'ebetso eohle ea cellulase le CMC hydrolysis. Ha mochine oa cellulose depolymerization o se o utloisisoa haholoanyane, ho lokela ho hlokomeloa hore li-exo-celllulase li ka sehloohong ho senyeha ha kristale (mohlala, Avicel) le ho se qhibilihe (mohlala, CMC) selulose.