I. Selelekela
Hydroxyethyl Cellulose (HEC) ke polima e qhibilihang ka metsing e se nang ionic e sebelisoang haholo ho ntša oli, ho roala, ho haha, lik'hemik'hale tsa letsatsi le letsatsi, ho etsa pampiri le masimo a mang. HEC e fumanoa ka phetoho ea lik'hemik'hale ea selulose, 'me thepa ea eona le tšebeliso ea eona li khethoa haholo ke li-substituents tsa hydroxyethyl limolek'hule tsa cellulose.
II. Mokhoa oa tlhahiso
Mokhoa oa tlhahiso ea HEC haholo-holo o kenyelletsa mehato e latelang: cellulose etherification, ho hlatsoa, ho felloa ke metsi, ho omisa le ho sila. Se latelang ke selelekela se qaqileng sa mohato ka mong:
Cellulose etherification
Cellulose e qala ho phekoloa ka alkali ho etsa alkali cellulose (Cellulose Alkali). Ts'ebetso ena e atisa ho etsoa ka mochine, ho sebelisa tharollo ea sodium hydroxide ho phekola selulose ea tlhaho ho theha selulose ea alkali. Karabelo ea lik'hemik'hale e tjena:
Cell-OH+NaOH→Cell-O-Na+H2OCell-OH+NaOH→Cell-O-Na+H 2O
Joale, alkali cellulose e kopana le ethylene oxide ho etsa hydroxyethyl cellulose. Boitšoaro bo etsoa tlas'a khatello e phahameng, hangata 30-100 ° C, 'me karabelo e khethehileng ke e latelang:
Cell-O-Na+CH2CH2O→Cell-O-CH2CH2OHCell-O-Na+CH 2CH 2O→Cell-O-CH 2CH 2OH
Karabelo ena e hloka taolo e nepahetseng ea mocheso, khatello le bongata ba ethylene oxide e kentsoeng ho netefatsa ho ts'oana le boleng ba sehlahisoa.
Ho hlatsoa
HEC e hlahisitsoeng hangata e na le alkali e sa sebetsanoang, ethylene oxide le lihlahisoa tse ling, tse lokelang ho tlosoa ka ho hlatsoa metsi ka makhetlo a mangata kapa ho hlatsoa lihlahisoa tsa motsoako. Metsi a mangata a hlokahala nakong ea ho hlatsoa metsi, 'me metsi a litšila ka mor'a ho hlatsoa a hloka ho phekoloa le ho ntšoa.
Ho felloa ke metsi 'meleng
HEC e nang le metsi ka mor'a ho hlatsoa e hloka ho felloa ke metsi, hangata ka ho hloekisa ka vacuum kapa karohano ea centrifugal ho fokotsa mongobo.
Ho omisa
HEC e se nang metsi e omisitsoe, hangata ka ho omisa ka spray kapa flash drying. Mocheso le nako li tlameha ho laoloa ka thata nakong ea ho omisa ho qoba ho theoha ha mocheso o phahameng kapa ho kopana.
Ho sila
Sebaka se omisitsoeng sa HEC se hloka ho siloa le ho sefa ho finyella kabo ea boholo ba likaroloana tse lekanang, 'me qetellong li thehe phofo kapa sehlahisoa sa granular.
III. Litšobotsi tsa ts'ebetso
Ho qhibiliha ha metsi
HEC e na le ho qhibiliha ha metsi hantle 'me e ka qhibiliha ka potlako metsing a batang le a chesang ho etsa tharollo e hlakileng kapa e khanyang. Thepa ena ea solubility e etsa hore e sebelisoe haholo e le setenya le se tsitsitseng ka har'a liaparo le lihlahisoa tsa letsatsi le letsatsi tsa lik'hemik'hale.
Ho teteana
HEC e bonts'a phello e matla e matla ka tharollo ea metsi, 'me viscosity ea eona e eketseha ka ho eketseha ha boima ba limolek'hule. Thepa ena e teteaneng e etsa hore e khone ho bapala karolo ea ho tiea, ho boloka metsi le ho ntlafatsa ts'ebetso ea kaho ea lirafshoa tse thehiloeng metsing le libotlolong tsa mohaho.
Rheology
Tharollo ea metsi a HEC e na le thepa e ikhethang ea rheological, 'me viscosity ea eona e fetoha ka ho fetoha ha sekhahla sa ho kuta, ho bonts'a ho fokotsa ho kuta kapa pseudoplasticity. Thepa ena ea rheological e e nolofalletsa ho fetola mokelikeli le ts'ebetso ea kaho ho li-coatings le maro a ho cheka sebakeng sa oli.
Emulsification le ho emisoa
HEC e na le thepa e ntle ea emulsification le ho emisoa, e ka tsitsitseng likaroloana tse emisitsoeng kapa marotholi tsamaisong ea ho hasana ho thibela stratification le sedimentation. Ka hona, HEC e atisa ho sebelisoa lihlahisoa tse kang liaparo tsa emulsion le ho emisoa ha lithethefatsi.
Biodegradability
HEC ke motsoako oa tlhaho oa cellulose o nang le biodegradability e ntle, ha o na tšilafalo ea tikoloho, 'me o finyella litlhoko tsa ts'ireletso ea tikoloho e tala.
IV. Libaka tsa Kopo
Liaparo
Ka liphahlo tse entsoeng ka metsi, HEC e sebelisoa e le motenya le stabilizer ho ntlafatsa mokelikeli, ts'ebetso ea kaho le thepa e khahlanong le ho senya ea liaparo.
Kaho
Ka thepa ea kaho, HEC e sebelisoa ka seretse se entsoeng ka samente le phofo ea putty ho ntlafatsa ts'ebetso ea kaho le ho boloka metsi.
Lik'hemik'hale Tsa Letsatsi le Letsatsi
Ka li-detergents, shampoos le menoana ea meno, HEC e sebelisoa e le motenya le botsitso ho ntlafatsa maikutlo le botsitso ba sehlahisoa.
Libaka tsa oli
Sebakeng sa oli ho cheka le maro a fracturing, HEC e sebelisetsoa ho lokisa thepa ea rheology le ho emisoa ha maro a ho cheka le ho ntlafatsa ts'ebetso ea ho cheka le polokeho.
Ho etsa pampiri
Ts'ebetsong ea ho etsa pampiri, HEC e sebelisetsoa ho laola pulp fluidity le ho ntlafatsa ho tšoana le thepa ea holim'a pampiri.
Hydroxyethyl cellulose (HEC) e 'nile ea sebelisoa haholo libakeng tse ngata tsa indasteri ka lebaka la ho qhibiliha ha eona ha metsi ka mokhoa o babatsehang, ho teteaneng, thepa ea rheological, emulsification le thepa ea ho emisa, hammoho le biodegradability e ntle. Ts'ebetso ea eona ea tlhahiso e batla e hōlile. Ka mehato ea cellulose etherification, ho hlatsoa, ho felloa ke metsi, ho omisa le ho sila, lihlahisoa tsa HEC tse nang le ts'ebetso e tsitsitseng le boleng bo botle li ka lokisoa. Nakong e tlang, ka ntlafatso ea litlhoko tsa ts'ireletso ea tikoloho le tsoelo-pele ea theknoloji, menyetla ea kopo ea HEC e tla ba e pharaletseng.
Nako ea poso: Jul-02-2024