Li-cellulose ethers tse fetotsoeng ke lihlopha tse fapaneng tsa metsoako ea lik'hemik'hale tse nkiloeng ho cellulose, polymer ea tlhaho e fumanoang marakong a lisele tsa limela.Cellulose ke polymer e nang le linear chain e entsoeng ka liyuniti tsa tsoekere tse hokahaneng ka libonto tsa β-1,4-glycosidic.Ke polymer ea tlhaho e ngata ka ho fetesisa Lefatšeng 'me e na le lisebelisoa tse ngata tsa bohlokoa joalo ka matla a holimo, letsoalo le tlase, biodegradability le nchafatso.
Li-cellulose ethers tse fetotsoeng li thehoa ka ho kenya lihlopha tse sa tšoaneng tsa lik'hemik'hale ka har'a molek'hule ea cellulose, e fetolang litšobotsi tsa eona tsa 'mele le tsa lik'hemik'hale.Phetoho ena e ka finyelloa ka mekhoa e mengata, ho kenyelletsa etherification, esterification, le oxidation.Li-ether tsa cellulose tse fetotsoeng tse hlahisitsoeng li na le lisebelisoa tse fapaneng liindastering tse fapaneng, ho kenyeletsoa lijo, meriana, litlolo, kaho le masela.
Mofuta o mong o tloaelehileng oa selulose ether e fetotsoeng ke methyl cellulose (MC), e entsoeng ka ho arabela selulose ka methyl chloride.MC ke polima e se nang ionic, e qhibilihang ka metsing e sebelisoang haholo e le sekontiri se teteaneng lijong, joalo ka setlamo sa lirafshoa, le joalo ka ho roala ha ho etsoa pampiri.MC e na le melemo e mengata ho feta li-thickeners tse ling, joalo ka bokhoni ba eona ba ho etsa li-gel tse bonaletsang, chefo ea eona e tlase, le ho hanyetsa ho senyeha ha enzyme.
Mofuta o mong oa ether ea selulose e fetotsoeng ke hydroxypropyl methyl cellulose (HPMC), e entsoeng ka ho arabela selulose ka motsoako oa propylene oxide le methyl chloride.HPMC ke polymer e seng ea ionic, e qhibilihang ka metsing e sebelisoang haholo e le setsi se teteaneng lijong le lihlahisoa tsa tlhokomelo ea botho, e le setlamo sa matlapa a meriana, hape e le seaparo sa indasteri ea kaho.HPMC e na le melemo e 'maloa ho feta li-thickeners tse ling, joalo ka bokhoni ba eona ba ho etsa li-gel tse tsitsitseng maemong a tlase, viscosity ea eona e phahameng ka mocheso o tlase, le ho lumellana ha eona le mefuta e mengata ea lisebelisoa tse ling.
Carboxymethyl cellulose (CMC) ke mofuta o mong oa ether ea selulose e fetotsoeng e entsoeng ka ho arabela selulose ka monochloroacetic acid.CMC ke polymer e qhibilihang ka metsing e sebelisoang haholo e le ntho e matlafatsang, e tsitsitseng, le emulsifier lijong, meriana le lihlahisoa tsa tlhokomelo ea botho.CMC e na le melemo e mengata ho feta li-thickeners tse ling, joalo ka bokhoni ba eona ba ho etsa li-gel tse bonaletsang, matla a eona a phahameng a ho ts'oara metsi, le ho hanyetsa ha eona ho senyeha ha enzyme.
Ethyl cellulose (EC) ke mofuta oa ether ea selulose e fetotsoeng e entsoeng ka ho arabela selulose ka ethyl chloride.EC ke polymer e seng ea ionic, e sa keneleng metsi e sebelisoang haholo e le ho roala indastering ea meriana.EC e na le melemo e 'maloa ho feta liaparo tse ling, tse kang bokhoni ba eona ba ho etsa filimi e tsoelang pele, viscosity ea eona e tlaase, le ho hanyetsa mongobo le mocheso.
Hydroxyethyl cellulose (HEC) ke mofuta o mong oa ether e fetotsoeng ea cellulose e entsoeng ka ho arabela selulose ka ethylene oxide.HEC ke polymer e qhibilihang ka metsing e sebelisoang haholo e le ntho e teteaneng lihlahisoa tsa tlhokomelo ea motho le e le tlamahano matlapeng a meriana.HEC e na le melemo e mengata ho feta tse ling tse teteaneng, tse kang bokhoni ba ho etsa li-gel tse bonaletsang, matla a eona a phahameng a ho tšoara metsi, le ho lumellana ha eona le mefuta e mengata ea lisebelisoa tse ling.
Thepa le tšebeliso ea li-cellulose ether tse fetotsoeng li itšetlehile ka lintlha tse 'maloa, tse kang mofuta oa sehlopha sa lik'hemik'hale tse hlahisoang, tekanyo ea ho nkeloa sebaka, boima ba limolek'hule le ho qhibiliha.Ka mohlala, ho eketsa tekanyo ea ho fetola MC kapa HPMC ho ka eketsa bokhoni ba bona ba ho tšoara metsi le viscosity, ha ba ntse ba fokotsa ho qhibiliha ha bona.Ka mokhoa o ts'oanang, ho eketsa boima ba limolek'hule tsa CMC ho ka eketsa viscosity ea eona le bokhoni ba eona ba ho etsa li-gel, ha e ntse e fokotsa matla a eona a ho boloka metsi.
Ts'ebeliso ea li-ether tsa cellulose tse fetotsoeng li ngata ebile li fapane.Indastering ea lijo, li sebelisoa e le li-thiening agents, li-stabilizers le li-emulsifiers lihlahisoa tse ngata tse fapaneng, ho akarelletsa le sopho, li-sauces, li-dressings le li-dessert.Li-cellulose ethers tse fetotsoeng li boetse li sebelisoa ha ho etsoa lijo tse nang le mafura a tlaase le a tlaase, kaha li ka etsisa sebopeho le molomo oa mafura ntle le ho eketsa lik'hilojule.Ho feta moo, li sebelisoa e le litlolo le likhalase lihlahisoa tsa confectionery ho ntlafatsa ponahalo ea bona le bophelo ba sethala.
Ka indasteri ea meriana, li-ether tsa cellulose tse fetotsoeng li sebelisoa e le li-binders, disintegrants, le li-coatings ka matlapa le li-capsules.Li boetse li sebelisoa e le li-modifiers tsa viscosity mekhoeng ea mokelikeli, joalo ka syrups le suspensions.Li-ether tsa cellulose tse fetotsoeng li ratoa ho feta li-excipients tse ling, kaha ha li na inert, li lumellana le lintho tse phelang, 'me li na le chefo e tlase.Ba boetse ba fana ka tekanyo e phahameng ea taolo holim'a sekhahla sa ho lokolloa ha lithethefatsi, se ka ntlafatsang ts'ebetso ea bona le polokeho ea bona.
Indastering ea litlolo, li- ether tsa cellulose tse fetotsoeng li sebelisoa e le lintho tse teteaneng, li-emulsifiers le li-stabilizers litlolong, litlolong le li-gel.Li boetse li sebelisoa e le lisebelisoa tsa ho etsa lifilimi lihlahisoa tsa tlhokomelo ea moriri, joalo ka li-shampoo le li-conditioner.Li-cellulose ethers tse fetotsoeng li ka ntlafatsa sebopeho le ponahalo ea lihlahisoa tsa litlolo, hammoho le ho ntlafatsa katleho ea tsona le botsitso.
Indastering ea kaho, li-cellulose ether tse fetotsoeng li sebelisoa e le lintho tse teteaneng, tse tlamang le ho boloka metsi ka samente, seretseng le samente.Li ka ntlafatsa ts'ebetso, botsitso, le matla a lisebelisoa tsena, hammoho le ho fokotsa ho honyela le ho phatloha ha tsona.Li-ethers tse fetotsoeng tsa cellulose li boetse li sebelisoa e le liphahlo le likhomaretsi ka likoahelong tsa lebota le fatše.
Indastering ea masela, li-ethers tse fetotsoeng tsa cellulose li sebelisoa e le lisebelisoa tsa boholo le li-thickeners ha ho etsoa masela le likhoele.Ba ka ntlafatsa mekhoa ea ho sebetsana le ho loha masela, hammoho le ho matlafatsa matla le ho tšoarella ha bona.
Ka kakaretso, li-ether tsa cellulose tse fetotsoeng ke metsoako e mengata e fapaneng le ea bohlokoa e nang le ts'ebeliso e mengata liindastering tse fapaneng.Ba fana ka melemo e mengata ho feta lipolymer tse ling, joalo ka biocompatibility, biodegradability, le tlhaho e nchafalitsoeng.Ba boetse ba fana ka tekanyo e phahameng ea taolo holim'a thepa ea 'mele le lik'hemik'hale tsa lihlahisoa, tse ka ntlafatsang boleng ba tsona le ts'ebetso ea tsona.Ka hona, li-ether tsa cellulose tse fetotsoeng li kanna tsa tsoela pele ho bapala karolo ea bohlokoa ho nts'etsopele ea lihlahisoa tse ncha le tse ncha nakong e tlang.
Nako ea poso: Apr-22-2023