I-Carboxymethyl cellulose (i-Sodium Carboxymethyl Cellulose) ebizwa ngokuthi i-CMC, iyinhlanganisela ye-polymer ye-colloid esebenzayo, iwuhlobo lwe-cellulose engenaphunga, enganambitheki, engenabuthi encibilika emanzini, eyenziwe ngokotini omuncayo ngokwelashwa ngamakhemikhali ngokomzimba. I-organic cellulose binder etholakele iwuhlobo lwe-cellulose ether, futhi usawoti wayo wesodium uvame ukusetshenziswa, ngakho igama lawo eligcwele kufanele libizwe nge-sodium carboxymethyl cellulose, okuyi-CMC-Na.
Njenge-methyl cellulose, i-carboxymethyl cellulose ingasetshenziswa njengesisetshenziswa sezinto eziphikisayo nanjengesibopho sesikhashana sezinto eziphikisayo.
I-sodium carboxymethyl cellulose iyi-polyelectrolyte yokwenziwa, ngakho-ke ingasetshenziswa njenge-disperant kanye ne-stabilizer kuma-slurries aphikisayo nama-castable, futhi iphinde ibe isibopho se-organic esisebenza kahle kakhulu. Inezinzuzo ezilandelayo:
1. I-Carboxymethyl cellulose ingakhangiswa kahle ebusweni bezinhlayiya, ingene futhi ixhume kahle izinhlayiya, ukuze kutholakale umzimba onamandla ophikisayo;
2. Njengoba i-carboxymethyl cellulose iyi-anionic polymer electrolyte, inganciphisa ukusebenzisana phakathi kwezinhlayiya ngemva kokukhangiswa phezu kwezinhlayiya, futhi idlale indima ye-disperant and protective colloid, ngaleyo ndlela ithuthukise ukuminyana namandla omkhiqizo futhi inciphise. ngemva kokushiswa. I-inhomogeneity yesakhiwo senhlangano;
3. Ukusebenzisa i-carboxymethyl cellulose njenge-binder, awukho umlotha ngemva kokushiswa, futhi kunezinto ezimbalwa ezincibilika kancane, ezingaphazamisi izinga lokushisa lokusetshenziswa komkhiqizo.
Izici Zomkhiqizo
1. I-CMC iyimpushana emhlophe noma ephuzi kancane ene-fibrous granular, ayinambitheki, ayinaphunga, ayinabuthi, encibilika kalula emanzini, futhi yakha i-viscous colloid esobala, isixazululo asithathi hlangothi noma sine-alkaline kancane. Ingagcinwa isikhathi eside ngaphandle kokuwohloka, futhi futhi izinzile ngaphansi kwezinga lokushisa eliphansi nokukhanya kwelanga. Kodwa-ke, ngenxa yoshintsho olusheshayo lokushisa, i-acidity kanye ne-alkalinity yesisombululo iyashintsha. Ngaphansi kwethonya lemisebe ye-ultraviolet kanye nama-microorganisms, kuzophinde kubangele i-hydrolysis noma i-oxidation, i-viscosity yesisombululo izokwehla, futhi ngisho nesixazululo sizokonakala. Uma ikhambi lidinga ukugcinwa isikhathi eside, izivimbelakuvunda ezifanele ezifana ne-formaldehyde, i-phenol, i-benzoic acid, i-organic mercury compounds, njll.
2. I-CMC iyafana namanye ama-electrolyte e-polymer. Uma ihlakazeka, iqala ukukhiqiza into yokuvuvukala, futhi izinhlayiya zinamathela komunye nomunye ukuze zenze ifilimu noma i-viscose, okwenza kube nzima ukuhlakazeka, kodwa kuhlakazeka kancane kancane. Ngakho-ke, lapho ulungiselela isisombululo saso samanzi, uma izinhlayiya zingamanziswa ngokufanayo kuqala, izinga lokuqedwa lingakhuphuka kakhulu.
3. I-CMC iyi-hygroscopic. Emkhathini, isilinganiso samanzi se-CMC sikhuphuka ngokunyuka kwezinga lokushisa lomoya futhi siyehla ngokunyuka kwezinga lokushisa lomoya. Uma izinga lokushisa elijwayelekile legumbi lingama-80%–50%, inani lamanzi elilinganayo lingaphezu kwama-26%, kanti amanzi omkhiqizo aqukethe u-10% noma ngaphansi. Ngakho-ke, ukupakishwa nokugcinwa komkhiqizo kufanele kunake umswakama-ubufakazi.
4. I-Zinc, ithusi, i-lead, i-aluminium, isiliva, insimbi, ithini, i-chromium kanye nosawoti wensimbi esindayo kunganciphisa isixazululo samanzi se-CMC. Ngaphandle kwe-lead acetate esekelwe kusawoti, imvula isengaphinda incibilike kusixazululo se-sodium hydroxide noma i-ammonium hydroxide. .
5. Ama-asidi aphilayo noma angaphili nawo azodala imvula esixazululweni salo mkhiqizo. Isimo sokuna siyahlukahluka ngohlobo nokugxilwa kwe-asidi. Ngokuvamile, imvula yenzeka lapho i-pH ingaphansi kuka-2.5, futhi ingatholwa ngemva kokungathathi hlangothi nge-alkali.
6. Ngosawoti onjenge-calcium, i-magnesium nosawoti wetafula, awunawo umthelela wezulu esixazululweni se-CMC, kodwa uthinta ukuncishiswa kwe-viscosity.
7. I-CMC iyahambisana namanye ama-glues ancibilikayo emanzini, izithambisa kanye nama-resin.
8. Amafilimu athathwe ku-CMC, acwiliswe ku-acetone, benzene, butyl acetate, carbon tetrachloride, castor oil, corn oil, ethanol, ether, dichloroethane, petroleum, methanol, methyl acetate, methyl ethyl acetate ekamelweni lokushisa Ketone, toluene, turpentine, i-xylene, amafutha e-peanut, njll. ingashintshwa phakathi namahora angu-24
Isikhathi sokuthumela: Nov-07-2022