Sodium Carboxymethyl Cellulose Viscosity

Viscosity ea sodium carboxymethyl cellulose le eona e arotsoe ka limaraka tse ngata ho latela ts'ebeliso e fapaneng. Viscosity ea mofuta oa ho hlatsoa ke 10 ~ 70 (ka tlase ho 100), moeli o ka holimo oa viscosity o tsoa ho 200 ~ 1200 bakeng sa mokhabiso oa mohaho le liindasteri tse ling, 'me viscosity ea sehlopha sa lijo e phahame le ho feta. Kaofela li ka holimo ho 1000, 'me viscosity ea liindasteri tse sa tšoaneng ha e tšoane.

Ka lebaka la mefuta e mengata ea lisebelisoa.
Viscosity ea sodium carboxymethyl cellulose e angoa ke boima ba eona ba molek'hule, mahloriso, mocheso le pH boleng, 'me e kopantsoe le cellulose ea ethyl kapa carboxypropyl, gelatin, xanthan gum, carrageenan, gum ea tsie, guar gum, agar, sodium alginate, pectin, gum arabic le starch le lihlahisoa tsa eona li lumellana hantle (ke hore, synergistic phello).

Ha pH ea boleng e le 7, viscosity ea sodium carboxymethyl cellulose solution ke eona e phahameng ka ho fetisisa, 'me ha pH ea bohlokoa e le 4 ~ 11, e batla e tsitsitse. Carboxymethylcellulose ka sebopeho sa tšepe ea alkali le letsoai la ammonium le qhibiliha ka metsing. Divalent metal ions Ca2+, Mg2+, Fe2+ e ka ama viscosity ea eona. Litšepe tse boima tse kang silevera, barium, chromium kapa Fe3+ li ka etsa hore e tsoe ka tharollo. Haeba mahloriso a li-ion a laoloa, joalo ka ho eketsoa ha motsoako oa chelating citric acid, ho ka etsoa tharollo e nang le viscous e eketsehileng, e hlahisang gum e bonolo kapa e thata.

Sodium carboxymethyl cellulose ke mofuta oa selulose ea tlhaho, eo hangata e entsoeng ka lesela la k'hothone kapa makhasi a lehong e le thepa e tala 'me e tlas'a karabelo ea etherification le monochloroacetic acid tlasa maemo a alkaline.

Ho ea ka litlhaloso tsa lisebelisoa tse tala le ho nkela sebaka sa hydroxyl hydrogen ka har'a yuniti ea selulose ea D-glucose ke sehlopha sa carboxymethyl, metsoako ea polymer e qhibilihang ka metsi e nang le likhato tse fapaneng tsa ho nka sebaka le kabo e fapaneng ea boima ba limolek'hule.

Hobane sodium carboxymethyl cellulose e na le litšobotsi tse ngata tse ikhethang le tse babatsehang, e sebelisoa haholo indastering ea letsatsi le letsatsi ea lik'hemik'hale, lijo le meriana le lihlahisoa tse ling tsa indasteri.

E 'ngoe ea matšoao a bohlokoahali a sodium carboxymethyl cellulose ke viscosity ea sodium carboxymethyl cellulose. Boleng ba viscosity bo amana le lintlha tse fapaneng tse kang mahloriso, mocheso le sekhahla sa ho kuta. Leha ho le joalo, lintlha tse kang ho tsepamisa mohopolo, mocheso le sekhahla sa ho kuta ke lintlha tse ka ntle tse amang viscosity ea sodium carboxymethyl cellulose.

Boima ba eona ba limolek'hule le kabo ea limolek'hule ke lintlha tse ka hare tse amang viscosity ea sodium carboxymethyl cellulose tharollo. Bakeng sa taolo ea tlhahiso le nts'etsopele ea ts'ebetso ea sehlahisoa sa sodium carboxymethyl cellulose, ho etsa lipatlisiso ka boima ba limolek'hule le kabo ea boima ba limolek'hule ho na le boleng ba bohlokoa haholo, athe viscosity Tekanyo e ka bapala karolo e itseng feela ea litšupiso.

Melao ea Newton ho rheology, ka kopo bala litaba tse amanang le "rheology" ka k'hemistri ea 'mele, ho thata ho e hlalosa ka polelo e le' ngoe kapa tse peli. Haeba u tlameha ho e bua: bakeng sa tharollo ea dilute ea cmc e haufi le mokelikeli oa Newtonian, khatello ea ho kuta e lekana le sekhahla sa ho itšeha, 'me tekanyo e lekanang pakeng tsa bona e bitsoa coefficient ea viscosity kapa kinematic viscosity.

Viscosity e tsoa ho matla a pakeng tsa liketane tsa limolek'hule tsa cellulose, ho kenyeletsoa matla a ho hasana le li-hydrogen bond. Haholo-holo, polymerization ea lihlahisoa tsa cellulose ha se sebopeho sa linear empa ke mohaho o nang le makala a mangata. Ka tharollo, selulose e mengata e nang le makala a mangata e kopantsoe ho etsa mohaho oa marang-rang oa sebaka. Ha mohaho o ntse o le thata, matla a mangata pakeng tsa liketane tsa molek'hule ka tharollo e hlahisoang.

Ho hlahisa phallo ka tharollo e hlapollang ea li-cellulose derivatives, matla pakeng tsa liketane tsa molek'hule e 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 tharollo ea CMC ke matla a khoheli. Tlas'a boemo ba matla a khoheli a sa khaotseng, mohaho oa ketane oa tharollo ea CMC e nang le tekanyo e kholo ea polymerization e na le matla a maholo, 'me phallo e lieha. Ho phalla butle ho bonahatsa viscosity.

Viscosity ea sodium carboxymethyl cellulose e amana haholo le boima ba limolek'hule, 'me ha e amane hakaalo le boemo ba ho nkela sebaka. Ha tekanyo ea ho kenya sebaka e kholoanyane, boima ba molek'hule bo boholo, hobane boima ba molek'hule ba sehlopha se nketsoeng sebaka sa carboxymethyl bo boholo ho feta sehlopha se fetileng sa hydroxyl.

Letsoai la sodium ea cellulose carboxymethyl ether, anionic cellulose ether, ke phofo kapa granule e tšoeu kapa e tšoeu ea lebese, e teteaneng ea 0.5-0.7 g/cm3, e batlang e se na monko, ha e latsoehe, ebile ha e na hygroscopic. Ho bonolo ho hasana ka metsing ho etsa motsoako o hlakileng oa colloidal, 'me ha o qhibilihe ka har'a metsoako ea tlhaho e kang ethanol. PH ea 1% ea tharollo ea metsi ke 6.5 ho isa ho 8.5. Ha pH> 10 kapa <5, viscosity ea sodium carboxymethylcellulose e fokotsehile haholo, 'me tshebetso e molemo ka ho fetisisa ha pH = 7.

E tsitsitse ka mocheso. Viscosity e nyoloha ka potlako ka tlase ho 20 ℃, mme e fetoha butle ho 45 ℃. Ho futhumatsa nako e telele ka holimo ho 80 ℃ ho ka senya colloid le ho fokotsa viscosity le tshebetso haholo. E qhibiliha habonolo metsing, 'me tharollo e hlakile; e tsitsitse haholo ka tharollo ea alkaline, 'me ho bonolo ho hydrolyze ka boteng ba asiti. Ha boleng ba pH bo le 2-3, bo tla theoha.