Mekhoa ea ho qhala cellulose ether ke efe?

Ho qhala li-cellulose ethers e ka ba mohato oa bohlokoa liindastering tse fapaneng tse kang tsa meriana, lijo, masela le kaho.Li-cellulose ethersli sebelisoa haholo ka lebaka la thepa ea tsona e kang ho teteaneng, ho tlama, ho etsa filimi, le ho tsitsisa. Leha ho le joalo, ho se qhibilihe ha tsona lihlapolli tse ngata tse tloaelehileng ho ka baka mathata. Ho entsoe mekhoa e mengata ea ho qhala li-cellulose ethers ka katleho.

Lisebelisoa tsa Organic:

Joala: Litahi tse tlase tsa boima ba limolek'hule tse kang ethanol, methanol le isopropanol li ka qhala li-cellulose ethers ho isa bohōleng bo itseng. Leha ho le joalo, li ka 'na tsa se ke tsa tšoanela mefuta eohle ea li-cellulose ethers 'me li ka hloka mocheso o phahameng.
Metsoako ea Ether-Alcohol: Metsoako ea diethyl ether le ethanol kapa methanol hangata e sebelisoa ho qhaqha li-cellulose ethers. Li-solvents tsena li fana ka solubility e ntle 'me hangata li sebelisoa libakeng tsa laboratori.
Ketones: Li-ketone tse ling tse kang acetone le methyl ethyl ketone (MEK) li ka qhala mefuta e itseng ea li-cellulose ethers. Acetone, haholo-holo, e sebelisoa haholo ka lebaka la theko e tlase le katleho ea eona.
Li-Esters: Li-ester tse kang ethyl acetate le butyl acetate li ka qhala li-cellulose ethers ka katleho. Leha ho le joalo, li ka 'na tsa hloka ho futhumatsa ho fihlela ho qhibiliha ka ho feletseng.

Litharollo tsa Aqueous:

Alkaline Solutions: Cellulose ethers e ka qhibiliha ka tharollo ea alkaline e kang sodium hydroxide (NaOH) kapa potassium hydroxide (KOH). Litharollo tsena li etsa hydrolyze li-cellulose ethers ho etsa matsoai a tšepe a alkali, a qhibilihang.
Ammonia Solutions: Litharollo tsa Ammonia (NH3) li ka boela tsa sebelisoa ho qhaqha cellulose ethers ka ho etsa letsoai la ammonium la ether.
Litharollo tsa Hydroxyalkyl Urea: Litharollo tsa Hydroxyalkyl urea, tse kang hydroxyethyl urea kapa hydroxypropyl urea, li ka qhala li-cellulose ethers ka katleho, haholo-holo tse nang le likhato tse tlaase tsa ho fetola.

Li-Ionic Liquids:

Mekelikeli ea Ionic ke matsoai a tlhaho a nang le mokelikeli mochesong o batlang o le tlase, hangata ka tlase ho 100°C. Mekelikeli e meng ea ionic e fumanoe e qhibilihisa cellulose ethers ka katleho ntle le tlhokahalo ea maemo a thata. Ba fana ka melemo e kang ho fokotseha ho tlaase, botsitso bo phahameng ba mocheso, le ho sebelisoa hape.

Litsamaiso tse Kopantsoeng tsa Solvent:

Ho kopanya metsoako e fapaneng ka linako tse ling ho ka ntlafatsa ho qhibiliha ha cellulose ethers. Ka mohlala, metsoako ea metsi a nang le motsoako o kang dimethyl sulfoxide (DMSO) kapa N-methyl-2-pyrrolidone (NMP) e ka ntlafatsa thepa ea ho qhibiliha.
Mohopolo oa Hansen Solubility Parameters o atisa ho sebelisoa ho rala mekhoa e sebetsang ea motsoako oa solvent bakeng sa ho qhala li-cellulose ethers ka ho nahana ka mekhahlelo ea ho qhibiliha ha metsoako ka bomong le tšebelisano ea bona.

Mekhoa ea 'Mele:

Ho kuta ka Mechanical: Ho kopanya ha li-shear tse phahameng kapa sonication ho ka thusa ho qhalakanya li-cellulose ethers ka li-solvents le ho ntlafatsa kinetics ea ho qhibiliha.
Taolo ea Mocheso: Lithempereichara tse phahameng hangata li ka ntlafatsa ho qhibiliha ha li-cellulose ethers ho lihlapolli tse itseng, empa tlhokomelo e lokela ho nkoa ho qoba ho senyeha ha polymer.

Phetoho ea Lik'hemik'hale:

Maemong a mang, phetoho ea lik'hemik'hale ea cellulose ethers e ka ntlafatsa thepa ea bona ea ho qhibiliha. Mohlala, ho hlahisa lihlopha tsa hydrophobic kapa ho eketsa tekanyo ea ho e nkela sebaka ho ka etsa hore li-cellulose ethers li qhibilihe haholoanyane ho lihlapolli tsa tlhaho.

Micellar Solutions:

Li-surfactants li ka etsa li-micelles ka tharollo, tse ka qhibilihangli-cellulose ethers. Ka ho lokisa maemo a surfactant le tharollo, hoa khonahala ho qhala cellulose ethers ka katleho.
Qetellong, khetho ea mokhoa oa ho qhala li-cellulose ethers e itšetlehile ka lintlha tse kang mofuta oa cellulose ether, solubility e lakatsehang, lintlha tsa tikoloho, le ts'ebeliso e reriloeng. Mokhoa o mong le o mong o na le melemo le mefokolo ea oona, 'me bafuputsi ba ntse ba tsoela pele ho hlahloba mekhoa e mecha ea ho ntlafatsa ho qhibiliha ha li-cellulose ethers ka lihlapolli tse sa tšoaneng.