Theko e tlase ea hec hydroxyethyl cellulose

Hydroxyethyl cellulose (HEC) ke polymer e sebetsang ka mokhoa o fapaneng e sebelisoang haholo liindastering tse fapaneng, ho kenyeletsoa liphahlo, likhomaretsi, lihlahisoa tsa tlhokomelo ea motho le meriana. Ha tlhoko ea HEC e ntse e hola liindastering tsena, bahlahisi ba batla litsela tsa ho fana ka mefuta e meng ea theko e tlase ho fihlela litlhoko tsa 'maraka. Sehloohong sena, re tla tšohla tse ling tsa litsela tseo bahlahisi ba ka fanang ka lihlahisoa tsa HEC tse theko e tlaase.

E 'ngoe ea litsela tsa ho fana ka HEC ea theko e tlase ke ho e hlahisa ho sebelisoa thepa e tala e tlase. HEC e tsoa ho selulose, e atisang ho fumanoa ho tloha ho makhasi a lehong, lithareng tsa k'hothone, kapa mehloling e meng ea limela. Leha ho le joalo, litšenyehelo tsa cellulose li ka fapana ho latela mohloli le boleng. Baetsi ba ka sebelisa selulose ea boemo bo tlaase kapa e tsosolositsoeng ho hlahisa HEC, e ka thusang ho fokotsa litšenyehelo tsa tlhahiso.

Mokhoa o mong oa ho fana ka HEC ea theko e tlase ke ho ntlafatsa ts'ebetso ea tlhahiso. HEC e atisa ho hlahisoa ka ho arabela selulose ka ethylene oxide, e lateloa ke etherification ka monochloroacetic acid kapa lik'hemik'hale tse ling. Ts'ebetso ea tlhahiso e ka ntlafatsoa ka ho sebelisa maemo a karabelo a nepahetseng haholoanyane, joalo ka mocheso o phahameng kapa likhatello, kapa ka ho sebelisa li-catalyst tse fapaneng. Ho ntlafatsa ts'ebetso ea tlhahiso ho ka fokotsa litšenyehelo tsa tlhahiso le ho lebisa lihlahisoa tse tlaase tsa HEC.

Mokhoa oa boraro oa ho fana ka HEC ea theko e tlase ke ho tsepamisa maikutlo ho hlahiseng HEC e nang le limaraka tse tlase tsa viscosity. HEC e fumaneha ka limaraka tse fapaneng tsa viscosity, ho tloha tlase ho isa holimo. Limaraka tse phahameng tsa viscosity hangata li na le thepa e matla ea ho tenya ebile li theko e boima haholo. Ka ho hlahisa limaraka tse tlase tsa viscosity tsa HEC, bahlahisi ba ka fana ka lihlahisoa tsa theko e tlase tse ntseng li fihlela litlhoko tsa 'maraka.

Qetellong, bahlahisi ba ka fana ka HEC ea theko e tlaase ka ho lebisa tlhokomelo mekhoeng ea tlhahiso ea theko e tlaase. Ka mohlala, bahlahisi ba bang ba hlahisitse mekhoa e mecha ea tlhahiso e sebelisang matla a fokolang kapa lik'hemik'hale tse fokolang, e leng se lebisang ho fokotsa litšenyehelo tsa tlhahiso. Baetsi ba bang ba ka tsepamisa maikutlo ho ntlafatseng ketane ea bona ea phepelo kapa marang-rang a phepelo ho fokotsa litšenyehelo tsa lipalangoang le polokelo.

Ha u batla lihlahisoa tsa HEC tse theko e tlaase, bareki ba lokela ho ela hloko mekhoa ea khoebo ea boleng bo ka bang teng. Lihlahisoa tsa HEC tse theko e tlaase li ka 'na tsa e-ba le bohloeki bo tlaase, viscosity e tlaase, kapa litaba tse ling tsa boleng tse ka amang ts'ebetso ea tsona lits'ebetsong tse fapaneng. Bareki le bona ba lokela ho ba hlokolosi ka lihlahisoa tse theko e tlase haholo ho feta karolelano ea 'maraka, kaha e kanna ea ba ea boleng bo tlase kapa mehloling e sa tšepahaleng.

Ka kakaretso, bahlahisi ba ka fana ka lihlahisoa tsa theko e tlaase tsa HEC ka ho sebelisa thepa e tala e theko e tlaase, ho ntlafatsa ts'ebetso ea tlhahiso, ho lebisa tlhokomelo ho limaraka tse tlaase tsa viscosity, le ho sebelisa mekhoa ea tlhahiso e theko e tlaase. Leha ho le joalo, bareki ba lokela ho ela hloko mekhoa ea khoebo ea boleng bo ka bang teng 'me ba lokela ho khetha lihlahisoa tse finyellang litlhoko tsa bona tse khethehileng le litlhoko tsa boleng.