Hydroxyethyl cellulose (HEC) ke ether ea nonionic cellulose e qhibilihang ka metsing, 'me mohloli oa eona o ka sehloohong ke cellulose ea tlhaho. Selulose ea tlhaho e teng ka bongata limela 'me ke karolo e ka sehloohong ea marako a lisele tsa limela. Haholo-holo, hydroxyethyl cellulose e entsoe ka lik'hemik'hale selulose ea tlhaho e nang le ethylene oxide tlas'a maemo a alkaline. Ts'ebetso ena ea karabelo ea lik'hemik'hale hangata e bitsoa ethoxylation, 'me sephetho ke hore lihlopha tsa hydroxyl tse limolek'hule tsa cellulose tsa tlhaho li nkeloa sebaka ka mokhoa o itseng kapa ka botlalo ho etsa hydroxyethyl cellulose ka lihlopha tsa ethoxy.
Tse latelang ke mehato e tobileng ea mokhoa oa ho lokisa hydroxyethyl cellulose:
Mohloli oa selulose: Hangata cellulose e ntšoa lihlahisoa tsa semela tse kang k'hothone le lehong. Selulose e nkiloeng e hloekisoa 'me e hloekisitsoe ho tlosa litšila tse kang lignin, hemicellulose le likarolo tse ling tse se nang cellulose ho fumana selulose e phahameng.
Alkalinization treatment: Kopanya cellulose le concentrated sodium hydroxide (NaOH) solution, le lihlopha tsa hydroxyl ka selulose li itšoara ka sodium hydroxide ho hlahisa sodium cellulose. Ts'ebetsong ena, sebopeho sa limolek'hule tsa cellulose se atoloha ho isa bohōleng bo itseng, ho etsa hore ho be bonolo ho itšoara ka ethylene oxide.
Ethoxylation reaction: Alkaized sodium cellulose e kopantsoe le ethylene oxide (C2H4O) ka mocheso o itseng le khatello. Sebopeho sa selikalikoe sa ethylene oxide se bula ho theha lihlopha tsa ethoxy (-CH2CH2OH), tse kopanang le lihlopha tsa hydroxyl ka limolek'hule tsa cellulose ho etsa hydroxyethyl cellulose. Ts'ebetso ena ea karabelo e ka etsoa ka likhato tse fapaneng, e bakang hydroxyethyl cellulose e nang le likhato tse fapaneng tsa ho nkela sebaka.
Ka mor'a Kalafo: Sehlahisoa ka mor'a karabelo hangata se na le alkaline e sa sebetsanoeng, li-solvents le lihlahisoa tse ling. E le ho fumana selulose e hloekileng ea hydroxyethyl, mehato ea ka mor'a phekolo e kang neutralization, ho hlatsoa le ho omisa hoa hlokahala. Sepheo sa mehato ena ea phekolo ke ho tlosa masala a alkali, li-solvents le lihlahisoa ho fumana sehlahisoa sa ho qetela se hloekisitsoeng.
Hydroxyethyl cellulose e sebelisitsoe haholo liindastering tse fapaneng ka lebaka la thepa ea eona e ikhethang ea lik'hemik'hale le ts'ebetso e ntle haholo. Haholo-holo, hydroxyethyl cellulose e na le ho qhibiliha ha metsi hantle, ho teteana, botsitso, ho etsa filimi le lubricity, 'me e sebelisoa hangata libakeng tse latelang:
Lisebelisoa tsa ho haha: Ka thepa ea mohaho, hydroxyethyl cellulose e sebelisoa haholo-holo e le ntho e teteaneng le e bolokang metsi bakeng sa lisebelisoa tse thehiloeng ho samente le lisebelisoa tse thehiloeng ho gypsum. E ka ntlafatsa ts'ebetso ea kaho ea thepa ka katleho, ea ntlafatsa ho bolokoa ha metsi, ho sebetsa le ho thibela ho senyeha ha seretse, ho eketsa nako e bulehileng le ho netefatsa tsoelo-pele e ntle ea kaho.
Indasteri ea pente: Ka pente, hydroxyethyl cellulose e sebelisoa e le ntho e teteaneng, e emisang le emulsifier ho ntlafatsa rheology le botsitso ba pente, ho thibela sedimentation ea pigment, le ho ntlafatsa ho bata le ho phatsima ha seaparo.
Litlolo le lihlahisoa tsa tlhokomelo ea botho: Ka litlolo, hydroxyethyl cellulose e atisa ho sebelisoa e le motenya, pele filimi le moisturizer. E ka fana ka lihlahisoa ka maikutlo a matle, ho ntlafatsa botsitso ba sehlahisoa le ho khomarela, le ho ntlafatsa phello ea mongobo.
Indasteri ea meriana: Lefapheng la meriana, hydroxyethyl cellulose e sebelisoa e le thuso bakeng sa litokisetso tsa meriana. E le karolo ea matlapa a tsoelang pele a lokolloa, liphahlo tsa filimi, joalo-joalo, e ka laola sekhahla sa ho lokolloa ha lithethefatsi le ho ntlafatsa botsitso le bioavailability ea lithethefatsi.
Indasteri ea lijo: Indasteri ea lijo, hydroxyethyl cellulose e sebelisoa e le tlatsetso ea lijo ho phetha karolo ea ho tiisa, ho emulsification le botsitso. E sebelisoa haholo ka lino, li-condiments, lihlahisoa tsa lebese le lijo tse ling ho ntlafatsa sebopeho le tatso ea lihlahisoa.
Hydroxyethyl cellulose e boetse e na le ts'ebeliso ea bohlokoa indastering ea ho ntša oli, ho etsa pampiri, ho hatisa masela le indastering ea ho daea. Ha ho ntšoa oli, hydroxyethyl cellulose e sebelisoa e le setenya le se tsitsitseng bakeng sa maro a ho cheka, e ka ntlafatsang bokhoni ba ho emisa metsi a ho cheka le ho thibela ho putlama ha seliba. Ka indasteri ea ho etsa pampiri, e sebelisoa e le moemeli oa ho boloka le ho matlafatsa ho ntlafatsa matla le ho tšoarella ha pampiri. Khatisong ea masela le ho daea, hydroxyethyl cellulose e sebelisoa e le motenya ho thusa seretse sa khatiso le sa ho daea hore se ajoe ka ho lekana le ho ntlafatsa boleng ba khatiso le ho daea.
Hydroxyethyl cellulose e fumanoa ho selulose ea tlhaho ka letoto la karabelo ea lik'hemik'hale. Tšebeliso ea eona e pharaletseng ha e bakoe feela ke thepa ea eona e babatsehang ea 'mele le ea lik'hemik'hale, empa hape hobane e ka fana ka tharollo e fapaneng liindastering tse ngata ho finyella litlhoko tse fapaneng tsa theknoloji.
Nako ea poso: Aug-13-2024