Carboxymethyl cellulose:
Ioniccellulose ethere entsoe ka likhoele tsa tlhaho (k'hothone, joalo-joalo) kamora kalafo ea alkali, ho sebelisoa sodium monochloroacetate joalo ka etherification agent, le ho etsa letoto la liphekolo tsa karabelo. Tekanyo ea ho kenya sebaka ka kakaretso ke 0.4 ~ 1.4, 'me ts'ebetso ea eona e angoa haholo ke tekanyo ea ho kenya sebaka.
(1) Carboxymethyl cellulose e na le hygroscopic, 'me e tla ba le metsi a mangata ha a bolokiloe tlas'a maemo a tloaelehileng.
(2) Carboxymethyl cellulose aqueous solution ha e hlahise gel, 'me viscosity e fokotseha ka ho eketseha ha mocheso. Ha mocheso o feta 50 ° C, viscosity ha e fetohe.
(3) Ho tsitsa ha eona ho ameha haholo ke PH. Ka kakaretso, e ka sebelisoa seretseng se thehiloeng ho gypsum, empa eseng ka seretseng sa samente. Ha e le alkaline e ngata, e tla lahleheloa ke viscosity.
(4) Ho boloka metsi a eona ho tlase haholo ho feta methyl cellulose. E na le phello e sitisang seretse se thehiloeng ho gypsum mme e fokotsa matla a eona. Leha ho le joalo, theko ea carboxymethyl cellulose e tlase haholo ho feta ea methyl cellulose.
Cellulose alkyl ether:
Baemeli ba eona ke methyl cellulose le ethyl cellulose. Tlhahisong ea indasteri, methyl chloride kapa ethyl chloride hangata e sebelisoa joalo ka etherification agent, mme karabelo e tjena:
Ka foromo, R e emela CH3 kapa C2H5. Khatiso ea alkali ha e ame feela tekanyo ea etherification, empa e boetse e ama tšebeliso ea alkyl halides. Ha khatello ea alkali e tlase e le tlase, hydrolysis ea alkyl halide e matla haholo. Bakeng sa ho fokotsa ts'ebeliso ea etherifying, khatello ea alkali e tlameha ho eketseha. Leha ho le joalo, ha motsoako oa alkali o phahame haholo, phello ea ho ruruha ea selulose e fokotsehile, e leng se sa lumellaneng le karabelo ea etherification, 'me tekanyo ea etherification e fokotsehile. Bakeng sa morero ona, lye kapa lye e tiileng e ka eketsoa nakong ea karabelo. Reactor e lokela ho ba le sesebelisoa se setle sa ho hlohlelletsa le ho tabola e le hore alkali e ka aroloa ka ho lekana.
Methyl cellulose e sebelisoa haholo e le thickener, sekhomaretsi le tšireletso colloid joalo-joalo E ka boela ea sebelisoa e le dispersant bakeng sa emulsion polymerization, bonding dispersant bakeng sa dipeo, lesela slurry, addititive bakeng sa lijo le litlolo, sekhomaretsi sa bongaka, thepa ea ho roala lithethefatsi, le bakeng sa pente ea latex, ho hatisa le ho eketsa nako ea ho laola, ho hatisa le ho eketsa nako ea ho hatisa, ho hatisa le ho eketsa nako ea ho hatisa, le ho eketsa nako ea ho hatisa le ho kopanya. matla a pele, joalo-joalo.
Lihlahisoa tsa ethyl cellulose li na le matla a phahameng a mochine, ho feto-fetoha ha maemo, ho hanyetsa mocheso le ho hanyetsa serame. Low-substituted ethyl cellulose e qhibiliha ka metsing 'me e hlapolla litharollo tsa alkaline,' me lihlahisoa tse nkeloang sebaka ka bongata li qhibiliha ka har'a metsoako e mengata ea tlhaho. E lumellana hantle le li-resin tse fapaneng le li-plasticizers. E ka sebelisoa ho etsa li-plastiki, lifilimi, li-varnish, li-adhesives, latex le lisebelisoa tsa ho roala lithethefatsi, joalo-joalo.
Ho kenyelletsoa ha lihlopha tsa hydroxyalkyl ka har'a cellulose alkyl ethers ho ka ntlafatsa ho qhibiliha ha eona, ho fokotsa kutloisiso ea eona ho salting ho tsoa, ho eketsa mocheso oa gelation le ho ntlafatsa thepa e chesang ea ho qhibiliha, joalo-joalo Tekanyo ea phetoho ea thepa e ka holimo e fapana le tlhaho ea li-substituents le karo-karolelano ea alkyl ho lihlopha tsa hydroxyalkyl.
Cellulose hydroxyalkyl ether:
Baemeli ba eona ke hydroxyethyl cellulose le hydroxypropyl cellulose. Etherifying agents ke epoxides tse kang ethylene oxide le propylene oxide. Sebelisa asiti kapa setsi e le catalyst. Tlhahiso ea indasteri ke ho sebetsana le selulose ea alkali ka etherification agent: hydroxyethyl cellulose e nang le boleng bo phahameng ba ho fetola e qhibiliha metsing a batang le metsing a chesang. Hydroxypropyl cellulose e nang le boleng bo phahameng ba ho e nkela sebaka e qhibiliha feela metsing a batang empa eseng metsing a chesang. Hydroxyethyl cellulose e ka sebelisoa e le setenya bakeng sa ho roala latex, khatiso ea masela le liphasete tse daeang, lisebelisoa tsa boholo ba pampiri, likhomaretsi le li-colloid tse sireletsang. Tšebeliso ea hydroxypropyl cellulose e tšoana le ea hydroxyethyl cellulose. Hydroxypropyl cellulose e nang le boleng bo tlase ba sebaka e ka sebelisoa e le mothusi oa meriana, e ka bang le thepa e tlamang le ea ho qhalana.
Carboxymethylcellulose, e khutsufalitsoeng joalo kaCMC, ka kakaretso e teng ka sebōpeho sa letsoai la sodium. Etherifying agent ke monochloroacetic acid, 'me karabelo e tjena:
Carboxymethyl cellulose ke selulose se qhibilihang ka metsing se sebelisoang haholo ka ho fetisisa. Nakong e fetileng, e ne e sebelisoa haholo-holo e le seretse sa ho cheka, empa hona joale se atolositsoe ho sebelisoa e le setlolo sa sesepa, liaparo tse slurry, pente ea latex, ho roala ka lebokose le pampiri, joalo-joalo. Pure carboxymethyl cellulose e ka sebelisoa lijong, meriana, litlolo, hape e le sekhomaretsi sa li-ceramics le hlobo.
Polyanionic cellulose (PAC) ke ioniccellulose ether'me ke sehlahisoa sa boemo bo holimo se nkelang sebaka sa carboxymethyl cellulose (CMC). Ke phofo e tšoeu, e tšoeu kapa e mosehla hanyenyane kapa granule, e seng chefo, e sa latsoeheng, e qhibilihang habonolo metsing, e etsa tharollo e hlakileng e nang le viscosity e itseng, e na le botsitso bo betere ba mocheso le ho hanyetsa letsoai, le thepa e matla ea antibacterial. Ha ho na hlobo le ho senyeha. E na le litšobotsi tsa bohloeki bo phahameng, boemo bo phahameng ba ho fetola, le kabo e tšoanang ea tse ling. E ka sebelisoa e le binder, thickener, rheology modifier, liquid loss reducer, suspension stabilizer, joalo-joalo Polyanionic cellulose (PAC) e sebelisoa haholo liindastering tsohle moo CMC e ka sebelisoang teng, e ka fokotsang haholo tekanyo, ho nolofalletsa tšebeliso, ho fana ka botsitso bo molemo le ho finyella litlhoko tse phahameng tsa ts'ebetso.
Cyanoethyl cellulose ke sehlahisoa sa karabelo ea selulose le acrylonitrile tlasa catalysis ea alkali:
Cyanoethyl cellulose e na le coefficient e phahameng ea dielectric kamehla le tahlehelo e tlase 'me e ka sebelisoa e le matrix a resin bakeng sa mabone a phosphor le electroluminescent. Selulose ea cyanoethyl e kentsoeng ka tlaase e ka sebelisoa e le pampiri e sireletsang bakeng sa li-transformer.
Li-ethers tsa joala tse mafura a phahameng, li-alkenyl ethers, le li-ethers tsa joala tse nkhang hamonate tsa cellulose li entsoe, empa ha lia sebelisoa.
Mekhoa ea ho itokisa ea cellulose ether e ka aroloa ka mokhoa oa mahareng oa metsi, mokhoa oa ho qhibiliha, mokhoa oa ho luba, mokhoa oa slurry, mokhoa o tiileng oa khase, mokhoa oa mokelikeli oa mokelikeli le motsoako oa mekhoa e ka holimo.
Nako ea poso: Apr-28-2024