Li-ether tsa seluloseke mofuta oa lintho tse fetotsoeng tse tsoang ho cellulose tse thehiloeng ho cellulose ea tlhaho, tse thehoang ka ho hlahisa lihlopha tse fapaneng tse sebetsang ka liketso tsa etherification. Jwalo ka mofuta oa thepa ea polymer e nang le ts'ebetso e ntle le ts'ebeliso e pharaletseng, li-ether tsa cellulose li na le ts'ebeliso ea bohlokoa kahong, meriana, lijong, litlolong, peteroleng, ho etsa pampiri, masela le masimo a mang ka lebaka la ho qhibiliha ha tsona hantle, thepa ea ho etsa filimi, ho khomarela, thepa ea ho teteana, ho boloka metsi le ho lumellana ha lintho tse phelang. Se latelang ke kakaretso ea sebopeho sa eona, karohano, ts'ebetso, mokhoa oa ho lokisa le ts'ebeliso.
1. Sebopeho le kabo ea lihlopha
Cellulose ke polymer ea tlhaho eo sebopeho sa eona sa motheo se entsoeng ka li-unit tsa glucose tse hokahantsoeng ke litlamo tsa β-1,4-glycosidic 'me e na le palo e kholo ea lihlopha tsa hydroxyl. Lihlopha tsena tsa hydroxyl li sekametse ho karabelo ea etherification, 'me lintho tse ling tse fapaneng tse nkeloang sebaka (tse kang methyl, hydroxypropyl, carboxymethyl, jj.) li hlahisoa tlas'a maemo a alkaline ho theha li-ether tsa cellulose.
Ho ea ka lintho tse fapaneng tse nkeloang sebaka, li-ether tsa cellulose li ka aroloa ka mekhahlelo e latelang:
Li-ether tsa cellulose tsa Anionic: tse kang sodium carboxymethyl cellulose (CMC-Na), e sebelisoang haholo lijong, meriana le ho cheka oli.
Li-ether tsa cellulose tse seng tsa ionic: tse kang methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl cellulose (HEC), jj., li sebelisoa haholo-holo kahong, meriana, lik'hemik'hale tsa letsatsi le letsatsi le liindastering tse ling.
Li-ether tsa cellulose tsa cationic: tse kang trimethyl ammonium chloride cellulose, tse sebelisoang ho etsa li-additives tsa pampiri le kalafo ea metsi le masimo a mang.
2. Litšobotsi tsa ts'ebetso
Ka lebaka la lintho tse fapaneng tse nkeloang sebaka, li-ether tsa cellulose li bontša thepa ea tsona e ikhethang, empa ka kakaretso li na le melemo e latelang:
Ho qhibiliha ho hotle: Bongata ba di-ether tsa cellulose di ka qhibilihisoa ka metsing kapa dihlahisweng tsa tlhaho ho etsa di-colloid tse tsitsitseng kapa ditharollo.
Ho tenya ho babatsehang le ho boloka metsi: ho ka eketsa haholo ho teteana ha tharollo, ho thibela ho feto-fetoha ha metsi, 'me ho ka ntlafatsa ho boloka metsi linthong tse kang seretse sa kaho.
Thepa ea ho etsa filimi: e ka etsa filimi e bonaletsang le e thata, e loketseng ho koahela lithethefatsi, ho koahela, jj.
Emulsification le ho hasana: ho tsitsisa mohato o hasaneng tsamaisong ea emulsion le ho ntlafatsa botsitso ba emulsion.
Ho lumellana ha lintho tse phelang le ho se be chefo: e loketse masimo a meriana le lijo.
3. Mokhoa oa ho lokisa
Ho lokisoa ha ether ea cellulose ka kakaretso ho nka mehato e latelang:
Ho kenya tshebetsong ha cellulose: ho arabela cellulose ya tlhaho ka sodium hydroxide ho hlahisa alkali cellulose.
Karabelo ea etherification: tlas'a maemo a itseng a karabelo, alkali cellulose le moemeli oa etherifying (joalo ka sodium chloroacetate, methyl chloride, propylene oxide, jj.) lia etherified ho hlahisa lintho tse ling tse fapaneng.
Ho se nke lehlakore le ho hlatswa: ho fokotsa dihlahiswa tse bakwang ke karabelo mme o hlatswe ho tlosa ditshila.
Ho omisa le ho sila: qetellong fumana phofo ea ether ea cellulose e felileng.
Ts'ebetso ea karabelo e hloka ho laola mocheso ka tieo, boleng ba pH le nako ea karabelo ho netefatsa tekanyo ea phetolo (DS) le ho tšoana ha sehlahisoa.
4. Libaka tse ka sehloohong tsa ts'ebeliso
Thepa ea kaho:Hydroxypropyl methylcellulose (HPMC)e sebelisoa haholo ka har'a seretse sa samente, phofo ea putty, sekhomaretsi sa thaele, jj., 'me e bapala karolo ea ho boloka metsi, ho teteana, ho thibela ho oa, jj.
Indasteri ea meriana:Hydroxypropyl cellulose (HPC), hydroxyethyl cellulose (HEC), jj. di sebediswa ho lokisa dikoahelo tsa matlapa, di-substrate tsa matlapa tse lokollwang ka nako e telele, jj., tse nang le thepa e ntle ya ho etsa filimi le ditlamorao tsa ho lokollwa ka nako e telele.
Indasteri ea lijo:Carboxymethyl cellulose (CMC)e sebelisoa e le sethibisi, se tiisang, le se kopanyang, joalo ka ice cream, lisoso, lino, jj.
Indasteri ea lik'hemik'hale ea letsatsi le letsatsi: e sebelisoa ho shampoo, sesepa sa ho hlatsoa, lihlahisoa tsa tlhokomelo ea letlalo, jj. ho ntlafatsa ho hlaka le botsitso ba sehlahisoa.
Ho cheka oli: CMC le HEC li ka sebelisoa e le li-additives tsa mokelikeli oa ho cheka ho eketsa viscosity le ho tlotsa ha mokelikeli oa ho cheka le ho ntlafatsa ts'ebetso ea ts'ebetso.
Ho etsa pampiri le masela: ho bapala karolo ea ho matlafatsa, ho lekanya boholo, ho hanyetsa oli le ho thibela ho silafatsa, le ho ntlafatsa thepa ea 'mele ea lihlahisoa.
5. Litebello le liphephetso tsa nts'etsopele
Ka dipatlisiso tse tebileng mabapi le k'hemistri e tala, mehlodi e ntjhafatswang le thepa e bolang, di-ether tsa cellulose di fumane tlhokomelo e eketsehileng ka lebaka la mehlodi ya tsona ya tlhaho le botsoalle ba tikoloho. Ditaelo tsa dipatlisiso tsa nakong e tlang di kenyeletsa haholo:
Hlahisa li-ether tsa cellulose tse sebetsang hantle, tse sebetsang hantle, tse kang thepa e bohlale e arabelang le e sebetsang hantle.
Ntlafatsa botala le boiketsetso ba ts'ebetso ea ho lokisa, le ho fokotsa tšebeliso ea matla a tlhahiso le tšilafalo.
Atolosa lits'ebetso tsa matla a macha, thepa e sireletsang tikoloho, bongaka ba biomedicine le masimo a mang.
Leha ho le jwalo, ether ya cellulose e ntse e tobane le mathata a kang ditjeo tse hodimo, bothata ba ho laola tekanyo ya phetolo, le dipharologanyo tsa sehlopha ho sehlopha tshebetsong ya tlhahiso, tse hlokang ho ntlafatswa ka ho tswela pele ka boqapi ba theknoloji.
Jwalo ka etswang ke polymer ya tlhaho e sebetsang ka mesebetsi e mengata, ether ya cellulose e na le melemo ya tshireletso ya tikoloho le tshebetso, mme ke tlatsetso ya bohlokwa dihlahisweng tse ngata tsa diindasteri. Ka kgatello ya ntshetsopele e tsitsitseng le thepa e tala, dipatlisiso le tshebediso ya yona di ntse di na le sebaka se seholo sa ntshetsopele. Nakong e tlang, ka ho kopanngwa ha dithuto tse fapaneng tsa thuto le ho kenngwa ha mahlale a matjha, ether ya cellulose e lebelletswe ho bapala karolo ya bohlokwa masimong a maemo a hodimo.
Nako ea poso: Mots'eanong-20-2025