Mokhoa oa ho Hlahisa Sodium Carboxymethylcellulose

Ts'ebetso ea tlhahiso ea sodium carboxymethylcellulose (CMC) e kenyelletsa mehato e 'maloa, ho kenyeletsoa le ho lokisa cellulose, ho etherification, ho hloekisa le ho omisa. Mona ke kakaretso ea ts'ebetso e tloaelehileng ea tlhahiso:

1. Ho Lokisa Cellulose: Ts'ebetso ena e qala ka ho lokisa cellulose, eo hangata e fumanoang ho tsoa ho pulp ea lehong kapa li-linters tsa k'hothone. Cellulose e hloekisoa pele le ho hloekisoa ho tlosa litšila tse kang lignin, hemicellulose, le litšila tse ling. Cellulose ena e hloekisitsoeng e sebetsa e le thepa ea pele bakeng sa tlhahiso ea CMC.
2. Alkalization: Cellulose e hloekisitsoeng e phekoloa ka tharollo ea alkaline, hangata sodium hydroxide (NaOH), ho eketsa reactivity ea eona le ho nolofatsa karabelo e latelang ea etherification. Alkalization e boetse e thusa ho ruruha le ho bula likhoele tsa cellulose, e leng se etsang hore li fumanehe habonolo bakeng sa phetoho ea lik'hemik'hale.
3. Karabelo ea Etherification: Cellulose e nang le alkali e arajoa ka monochloroacetic acid (MCA) kapa letsoai la eona la sodium, sodium monochloroacetate (SMCA), moo ho nang le catalyst tlas'a maemo a laoloang. Karabelo ena ea etherification e kenyelletsa ho nkeloa sebaka ha lihlopha tsa hydroxyl liketaneng tsa cellulose ka lihlopha tsa carboxymethyl (-CH2COONa). Tekanyo ea phetolo (DS), e emelang palo e tloaelehileng ea lihlopha tsa carboxymethyl ka yuniti ea glucose ea ketane ea cellulose, e ka laoloa ka ho fetola liparamente tsa karabelo tse kang mocheso, nako ea karabelo, le mahloriso a reactant.
4. Ho se be le metsoako e feteletseng: Kamora karabelo ya etherification, sehlahiswa se hlahang se a se be le metsoako e fokolang ho fetola dihlopha tse setseng tsa asiti hore e be mofuta wa tsona wa letswai la sodium (carboxymethylcellulose sodium). Sena hangata se fihlellwa ka ho eketsa tharollo ya alkaline, jwalo ka sodium hydroxide (NaOH), motswakong wa karabelo. Ho se be le metsoako e fokolang ho boetse ho thusa ho lokisa pH ya tharollo le ho tsitsisa sehlahiswa sa CMC.
5. Ho hlwekisa: Sodium carboxymethylcellulose e tala e hlwekiswa ho tlosa ditshila, di-reagent tse sa arajwang, le dihlahiswa tse tswang motswakong wa karabelo. Mekhoa ya ho hlwekisa e ka kenyeletsa ho hlatswa, ho sefa, ho centrifugation, le ho omisa. CMC e hlwekisitsweng hangata e hlatsuwa ka metsi ho tlosa alkali le matswai a setseng, e latelwe ke ho sefa kapa ho centrifugation ho arola sehlahiswa se tiileng sa CMC ho tloha mokgahlelong wa metsi.
6. Ho omisa: Sodium carboxymethylcellulose e hloekisitsoeng e qetella e omisitsoe ho tlosa mongobo o feteletseng le ho fumana mongobo o lakatsehang bakeng sa polokelo le ts'ebetso e tsoelang pele. Mekhoa ea ho omisa e ka kenyelletsa ho omisa ka moea, ho omisa ka spray, kapa ho omisa ka meropa, ho latela litšobotsi tsa sehlahisoa se lakatsehang le sekala sa tlhahiso.

Sehlahisoa se hlahisoang ke sodium carboxymethylcellulose ke phofo e tšoeu ho isa ho e tšoeu kapa thepa e nang le granular e nang le ho qhibiliha ho hoholo ha metsi le thepa ea rheological. E sebelisoa haholo e le sesebelisoa sa ho teteana, ho tsitsisa, ho kopanya le ho fetola rheology liindastering tse fapaneng, ho kenyeletsoa lijo, meriana, litlolo, masela le lits'ebetso tsa indasteri.