Viscosity ea sodium carboxymethyl cellulose le eona e arotsoe ka mefuta e mengata ho latela ts'ebeliso e fapaneng. Viscosity ea mofuta oa ho hlatsoa ke 10~70 (ka tlase ho 100), moeli o kaholimo oa viscosity ke ho tloha ho 200~1200 bakeng sa mekhabiso ea meaho le liindasteri tse ling, 'me viscosity ea sehlopha sa lijo e phahame le ho feta. Kaofela li kaholimo ho 1000, 'me viscosity ea liindasteri tse fapaneng ha e tšoane.
Ka lebaka la mefuta e mengata ea tšebeliso ea eona.
Ho teteana ha sodium carboxymethyl cellulose ho angoa ke boima ba eona ba limolek'hule, mahloriso, mocheso le boleng ba pH, 'me e kopantsoe le ethyl kapa carboxypropyl cellulose, gelatin, xanthan gum, carrageenan, locust bean gum, guar gum, agar, sodium alginate, pectin, gum arabic le starch 'me metsoako ea eona e na le tšebelisano e ntle (ke hore, phello ea synergistic).
Ha boleng ba pH bo le 7, viscosity ea tharollo ea sodium carboxymethyl cellulose e phahame ka ho fetisisa, 'me ha boleng ba pH bo le 4 ~ 11, e tsitsitse hanyane. Carboxymethylcellulose ka mokhoa oa alkali metal le ammonium salts e qhibiliha ka metsing. Li-ion tsa tšepe tse arohaneng Ca2+, Mg2+, Fe2+ li ka ama viscosity ea eona. Litšepe tse boima tse kang silevera, barium, chromium kapa Fe3+ li ka etsa hore e tsoe ka har'a tharollo. Haeba mahloriso a li-ion a laoloa, joalo ka ho eketsoa ha citric acid e thusang ho chelating, tharollo e tiileng haholoanyane e ka etsoa, e fellang ka chelate e bonolo kapa e thata.
Selulose ea sodium carboxymethyl ke mofuta oa selulose ea tlhaho, eo hangata e entsoeng ka k'hothone e entsoeng ka linter kapa pulp ea lehong e le thepa e tala 'me e kenngoa karabelong ea etherification le monochloroacetic acid tlas'a maemo a alkaline.
Ho ya ka ditlhaloso tsa thepa e tala le ho nkelwa sebaka ha haedrojene ya hydroxyl yuniting ya selelulose D-glucose ke sehlopha sa carboxymethyl, ho fumanwa metswako ya polymer e qhibilihang ka metsing e nang le maemo a fapaneng a ho nkelwa sebaka le dikabo tse fapaneng tsa boima ba dimolek'hule.
Kaha sodium carboxymethyl cellulose e na le litšobotsi tse ngata tse ikhethang le tse ntle, e sebelisoa haholo indastering ea lik'hemik'hale ea letsatsi le letsatsi, lijong le meriana le tlhahisong e 'ngoe ea indasteri.
E 'ngoe ea matšoao a bohlokoa ka ho fetisisa a sodium carboxymethyl cellulose ke ho teteana ha sodium carboxymethyl cellulose. Boleng ba ho teteana bo amana le lintlha tse fapaneng tse kang ho teteana, mocheso le sekhahla sa ho teteana. Leha ho le joalo, lintlha tse kang ho teteana, mocheso le sekhahla sa ho teteana ke lintlha tsa kantle tse amang ho teteana ha sodium carboxymethyl cellulose.
Boima ba eona ba limolek'hule le kabo ea limolek'hule ke lintlha tsa ka hare tse amang ho hlaka ha tharollo ea sodium carboxymethyl cellulose. Bakeng sa taolo ea tlhahiso le nts'etsopele ea ts'ebetso ea sehlahisoa sa sodium carboxymethyl cellulose, ho batlisisa boima ba eona ba limolek'hule le kabo ea boima ba limolek'hule ho na le boleng ba bohlokoa haholo ba litšupiso, ha ho hlaka ha ho lekanya ho ka bapala karolo e itseng feela ea litšupiso.
Melao ea Newton ho rheology, ka kopo bala litaba tse amehang tsa "rheology" k'hemistring ea 'mele, ho thata ho li hlalosa ka polelo e le 'ngoe kapa tse peli. Haeba u tlameha ho li bua: bakeng sa tharollo e hlapolotsoeng ea cmc haufi le mokelikeli oa Newtonian, khatello ea shear e lekana le sekhahla sa ho qetela, 'me coefficient e lekanang pakeng tsa tsona e bitsoa coefficient ea viscosity kapa kinematic viscosity.
Ho thibana ho nkuwa ke matla a pakeng tsa liketane tsa limolek'hule tsa cellulose, ho kenyeletsoa matla a ho hasana le maqhama a haedrojene. Haholo-holo, polymerization ea li-derivatives tsa cellulose ha se sebopeho se otlolohileng empa ke sebopeho se nang le makala a mangata. Tharollong, cellulose e mengata e nang le makala a mangata e hokahane ho theha sebopeho sa marang-rang a sebaka. Ha sebopeho se ntse se tiile, matla a pakeng tsa liketane tsa limolek'hule a ba maholo ka ho fetisisa tharollong e hlahang.
Ho hlahisa phallo ka tharollong e hlapolotsoeng ea lintho tse tsoang ho cellulose, matla a pakeng tsa liketane tsa limolek'hule a tlameha ho hlōloa, kahoo tharollo e nang le tekanyo e phahameng ea polymerization e hloka matla a maholo ho hlahisa phallo. Bakeng sa tekanyo ea viscosity, matla a tharollong ea CMC ke matla a khoheli. Tlas'a boemo ba matla a khoheli a sa khaotseng, sebopeho sa ketane ea tharollo ea CMC e nang le tekanyo e kholo ea polymerization se na le matla a maholo, 'me phallo e lieha. Phallo e liehang e bonahatsa viscosity.
Ho teteana ha sodium carboxymethyl cellulose ho amana haholo le boima ba limolek'hule, 'me ha ho amane hakaalo le tekanyo ea ho nkeloa sebaka. Ha tekanyo ea ho nkeloa sebaka e le kholoanyane, boima ba limolek'hule bo ba boholo, hobane boima ba limolek'hule ba sehlopha sa carboxymethyl se nkeloang sebaka bo boholo ho feta sehlopha sa hydroxyl se fetileng.
Letswai la sodium la cellulose carboxymethyl ether, ether ea cellulose ea anionic, ke phofo kapa granule e tšoeu kapa e tšoeu ea fibrous e tšoeu, e nang le boima ba 0.5-0.7 g/cm3, e batlang e se na monko, e se nang tatso, 'me e na le hygroscopic. Ho bonolo ho e hasanya ka metsing ho etsa tharollo e bonaletsang ea colloidal, 'me ha e qhibilihe ka har'a li-solvents tsa tlhaho tse kang ethanol. pH ea tharollo ea metsi ea 1% ke 6.5 ho isa ho 8.5. Ha pH e le>10 kapa <5, viscosity ea sodium carboxymethylcellulose e fokotseha haholo, 'me ts'ebetso e ntle ka ho fetisisa ha pH = 7.
E tsitsitse mochesong. Viscosity e nyoloha ka potlako ka tlase ho 20℃, 'me e fetoha butle ho 45℃. Ho futhumatsa nako e telele ho feta 80℃ ho ka senya colloid le ho fokotsa viscosity le ts'ebetso haholo. E qhibiliha habonolo metsing, 'me tharollo e bonaletsa; e tsitsitse haholo ka har'a tharollo ea alkaline, 'me ho bonolo ho e hydrolyze ha ho na le asiti. Ha pH e le 2-3, e tla fifala.
Nako ea poso: Pulungoana-07-2022