Cellulose Ether Classification
Cellulose ether ke lentsoe le akaretsang bakeng sa letoto la lihlahisoa tse hlahisoang ke karabelo ea alkali cellulose le etherifying agent tlasa maemo a itseng. Ha selulose ea alkali e nkeloa sebaka ke li-etherifying tse fapaneng, li-ether tse fapaneng tsa cellulose li tla fumanoa.
Ho ea ka thepa ea ionization ea li-substituent, cellulose ethers e ka aroloa ka mekhahlelo e 'meli: ionic (joalo ka carboxymethyl cellulose) le nonionic (joalo ka methyl cellulose).
Ho latela mofuta oa substituent, cellulose ether e ka aroloa ka monoether (joalo ka methyl cellulose) le ether e tsoakiloeng (joalo ka hydroxypropyl methyl cellulose).
Ho ea ka solubility e fapaneng, e ka aroloa ka ho qhibiliha ha metsi (joalo ka hydroxyethyl cellulose) le organic solvent solubility (joalo ka ethyl cellulose).
Li-ethers tsa cellulose tse qhibilihang ka metsing tse sebelisoang liretseng tse tsoakiloeng tse omeletseng li arotsoe ka li-ethers tse qhibilihang hang-hang le tse sebelisoang ka holim'a metsi tse liehang ho qhibiliha.
Liphapang tsa bona li hokae? Hona na u ka e hlophisa hantle joang hore e be tharollo ea metsi a 2% bakeng sa tlhahlobo ea viscosity?
Phekolo e ka holimo ke eng?
Na phello ho cellulose ether?
pele
Phekolo ea holim'a metsi ke mokhoa oa maiketsetso oa ho etsa lera le ka holimo holim'a thepa ea motheo e nang le thepa ea mechine, ea 'mele le ea lik'hemik'hale e fapaneng le ea motheo.
Sepheo sa phekolo ea holim'a selulose ether ke ho liehisa nako ea ho kopanya cellulose ether le metsi ho finyella litlhoko tse liehang tse teteaneng tsa lirafshoa tse ling tsa pente, le ho eketsa ho hanyetsa ho bola ha cellulose ether le ho ntlafatsa botsitso ba polokelo.
Phapang ha metsi a batang a lokisoa ka tharollo ea metsi a 2%:
Selulose ether e entsoeng ka holim'a metsi e ka hasana ka potlako metsing a batang 'me ha ho bonolo ho e kopanya ka lebaka la li-viscosities tsa eona tse liehang;
Cellulose ether ntle le kalafo ea holim'a metsi, ka lebaka la li-viscosity tsa eona tse potlakileng, e tla ba le viscous pele e qhalakanngoa ka ho feletseng metsing a batang, 'me e atisa ho ba le agglomeration.
Mokhoa oa ho lokisa ether ea cellulose e sa sebelisoang holim'a sefahleho?
1. Qala ka ho kenya tekanyo e itseng ea ether ea cellulose e sa sebelisoang holim'a metsi;
2. Ebe u eketsa metsi a chesang ka likhato tse ka bang 80 tsa Celsius, boima ke karolo ea boraro ea metsi a hlokahalang, e le hore e ka ruruha ka ho feletseng le ho qhalana;
3. Ka mor'a moo, butle-butle tšela metsi a batang, boima ke likarolo tse peli ho tse tharo tsa metsi a setseng a hlokahalang, tsoela pele ho hlohlelletsa ho etsa hore e khomarele butle-butle, 'me ho ke ke ha e-ba le agglomeration;
4. Qetellong, tlas'a boemo ba boima bo lekanang, bo kenye ka mocheso o sa khaotseng oa ho hlapa metsi ho fihlela mocheso o theohela ho likhato tse 20 tsa Celsius, ebe joale tlhahlobo ea viscosity e ka etsoa!
Nako ea poso: Feb-02-2023