I-Carboxymethyl cellulose (i-sodium carboxyme thyl cellulose, i-CMC) iphuma ku-carboxymethylated ku-cellulose, eyaziwa nangokuthi i-cellulose gum, futhi iyinhlaka ye-ionic cellulose ebaluleke kakhulu.
I-CMC imvamisa iyinhlanganisela ye-anionic polymer elungiswa ngokusabela i-cellulose yemvelo nge-caustic alkali ne-monochloroacetic acid. Isisindo samangqamuzana alesi sithako siyahlukahluka kusukela ezinkulungwaneni ezimbalwa kuya esigidini esisodwa.
I-CMC ingeyokushintshwa kwe-cellulose yemvelo, futhi Inhlangano Yezokudla Nezolimo yeNhlangano Yezizwe Ezihlangene (i-FAO) kanye neNhlangano Yezempilo Yomhlaba (i-WHO) bayibize ngokusemthethweni ngokuthi “i-cellulose eguquliwe”. Indlela yokuhlanganisa ye-sodium carboxymethyl cellulose yasungulwa ngu-German E. Jansen ngo-1918, futhi yanikezwa ilungelo lobunikazi ngo-1921 futhi yaziwa emhlabeni wonke, yabe isithengiswa eYurophu.
I-CMC isetshenziswa kabanzi ku-petroleum, geological , amakhemikhali ansuku zonke, ukudla, imithi kanye nezinye izimboni, ezaziwa ngokuthi "i-industrial monosodium glutamate".
※Izakhiwo zesakhiwo se-CMC
I-CMC iyimpushana emhlophe noma ekhanyayo ephuzi, eyimbudumbudu noma eqinile. Kuyikhemikhali eyi-macromolecular ekwazi ukumunca amanzi futhi ivuvuke. Uma ikhukhumala emanzini, ingakha ingcina ye-viscous ebonakalayo. I-pH ye-aqueous suspension yi-6.5-8.5. I-substance ayincibiliki kuzincibilikisi eziphilayo njenge-ethanol, i-ether, i-acetone ne-chloroform.
I-Solid CMC izinzile ekukhanyeni nasegumbini lokushisa, futhi ingagcinwa isikhathi eside endaweni eyomile. I-CMC iwuhlobo lwe-cellulose ether, evame ukwenziwa ngamalitha kakotini amafushane (okuqukethwe kwe-cellulose kufika ku-98%) noma i-pulp yokhuni, ephathwa nge-sodium hydroxide bese isabela nge-sodium monochloroacetate, isisindo samangqamuzana enhlanganisela singama-6400 (± 1000). Ngokuvamile kunezindlela ezimbili zokulungiselela: indlela yamanzi-amalahle kanye nendlela yokuncibilikisa. Kukhona neminye imicu yezitshalo esetshenziselwa ukulungisa i-CMC.
※Izici kanye nezicelo
I-CMC ayiyona nje kuphela i-emulsification stabilizer ne-thickener ezinhle ekufakweni kokudla, kodwa futhi inokuqina okuhle kakhulu kokuqandisa nokuncibilika, futhi ingathuthukisa ukunambitheka komkhiqizo futhi yandise isikhathi sokugcina.
Ngo-1974, iNhlangano Yezokudla Nezolimo yeNhlangano Yezizwe Ezihlangene (i-FAO) kanye neNhlangano Yezempilo Yomhlaba (i-WHO) yagunyaza ukusetshenziswa kwe-CMC emsulwa ekudleni ngemva kocwaningo nokuhlolwa okuqinile kwezinto eziphilayo kanye nobuthi. Ukudla okuphephile (ADI) kwezinga lamazwe ngamazwe kungu-25mg/kg isisindo somzimba/ngosuku.
※Ti-hickening kanye nokuzinza kwe-emulsion
Ukudla i-CMC kungahlanganisa futhi kuzinzise iziphuzo eziqukethe amafutha namaprotheni. Lokhu kungenxa yokuthi i-CMC iba i-colloid ezinzile esobala ngemva kokuncibilika emanzini, futhi izinhlayiya zamaprotheni ziba yizinhlayiya ezineshaji efanayo ngaphansi kokuvikelwa kolwelwesi lwe-colloidal, olungenza izinhlayiya zephrotheni zibe esimweni esizinzile. Inomphumela othile we-emulsifying, ngakho-ke inganciphisa ukungezwani kwendawo phakathi kwamafutha namanzi ngesikhathi esifanayo, ukuze amafutha afakwe ngokugcwele.
I-CMC ingathuthukisa ukuzinza komkhiqizo, ngoba lapho inani le-pH lomkhiqizo lichezuka endaweni ye-isoelectric yeprotheni, i-sodium carboxymethyl cellulose ingakha isakhiwo esiyinhlanganisela nephrotheni, engathuthukisa ukuzinza komkhiqizo.
※Khulisa inqwaba
Ukusetshenziswa kwe-CMC ku-ayisikhilimu kungakhuphula izinga lokunwetshwa kuka-ayisikhilimu, kuthuthukise isivinini sokuncibilika, kunikeze isimo esihle nokunambitha, futhi kulawule usayizi nokukhula kwamakristalu eqhwa ngesikhathi sokuthutha nokugcinwa. Inani elisetshenzisiwe lingu-0.5% wesamba esihlanganisiwe Esilinganiselwe.
Lokhu kungenxa yokuthi i-CMC inokugcinwa kahle kwamanzi kanye nokuhlakazeka, futhi ihlanganisa izinhlayiya zamaprotheni, ama-fat globules, nama-molecule amanzi ku-colloid ukuze kwakheke uhlelo olufanayo noluzinzile.
※I-Hydrophilicity kanye nokubuyiselwa kwamanzi emanzini
Lesi sakhiwo esisebenzayo se-CMC sivame ukusetshenziswa ekukhiqizeni isinkwa, okungenza iyunifomu yekhekhe lezinyosi, ikhulise ivolumu, inciphise ama-drags, futhi ibe nomthelela wokulondoloza ukushisa nokusha; ama-noodle angezwe nge-CMC anomthamo omuhle wokubamba amanzi, ukumelana nokupheka, nokunambitheka okuhle.
Lokhu kunqunywa ukwakheka kwamangqamuzana e-CMC, okuphuma ku-cellulose futhi inenani elikhulu lamaqembu e-hydrophilic ochungechungeni lwamangqamuzana: -OH iqembu, iqembu le-COONa, ngakho-ke i-CMC ine-hydrophilicity engcono kune-cellulose namandla okubamba amanzi.
※ I-Gelation
Thixotropic CMC isho ukuthi amaketanga e-macromolecular anenani elithile lokusebenzisana futhi ajwayele ukwakha isakhiwo esinezinhlangothi ezintathu. Ngemva kokwakhiwa kwesakhiwo esinezinhlangothi ezintathu, i-viscosity yesisombululo iyanda, futhi ngemva kokuphulwa kwesakhiwo se-three-dimensional, i-viscosity iyancipha. I-thixotropy phenomenon ukuthi ushintsho olubonakalayo lwe-viscosity luncike esikhathini.
Thixotropic CMC idlala indima ebalulekile ohlelweni lwe-gelling futhi ingasetshenziswa ukwenza i-jelly, ujamu nokunye ukudla.
Ingasetshenziswa njenge-clarifier, i-foam stabilizer, ukwandisa ukuzwakala komlomo
I-CMC ingasetshenziswa ekukhiqizweni kwewayini ukwenza ukunambitheka kube lula futhi kucebile ngokunambitha okude; ingasetshenziswa njenge-foam stabilizer ekukhiqizeni ubhiya ukwenza igwebu licebile futhi lihlale isikhathi eside futhi lithuthukise ukunambitheka.
I-CMC iwuhlobo lwe-polyelectrolyte, olungase lubandakanyeke ekuphenduleni okuhlukahlukene ewayinini ukuze kugcinwe ibhalansi yomzimba wewayini. Ngesikhathi esifanayo, iphinde ihlanganise namakristalu akhiwe, ukushintsha ukwakheka kwamakristalu, ukuguqula izimo zokuba khona kwamakristalu ewayini, futhi kubangele imvula. Ukuhlanganiswa kwezinto.
Isikhathi sokuthumela: Dec-03-2022