Ho etsoa ka Hydroxyethyl Cellulose

Hydroxyethyl cellulose (HEC) hangata e etsoa ka karabelo ea lik'hemik'hale e laoloang lipakeng tsa selulose le ethylene oxide, e lateloe ke hydroxyethylation. Ts'ebetso e kenyelletsa mehato e mengata, ho kenyelletsa:

1. Tokisetso ea Cellulose: Ts'ebetso ea tlhahiso e qala ka ho aroloa ha selulose mehloling e ka nchafatsoang joalo ka makhasi a patsi, lithara tsa k'hothone, kapa likhoele tse ling tsa semela. Selulose hangata e hloekisoa le ho sebetsoa ho tlosa litšila le lignin, e leng se etsang hore ho be le thepa e hloekisitsoeng haholo ea cellulose.
2. Ethoxylation: Mohato ona, thepa e hloekisitsoeng ea cellulose e sebetsanoa le ethylene oxide ka pel'a li-catalysts tsa alkaline tlas'a maemo a laoloang. Limolek'hule tsa ethylene oxide li eketsa lihlopha tsa hydroxyl (-OH) tsa ketane ea cellulose polymer, e leng se etsang hore ho kenngoe lihlopha tsa ethoxy (-OCH2CH2-) mokokotlong oa cellulose.
3. Hydroxyethylation: Ka mor'a ethoxylation, cellulose ea ethoxylated e tsoela pele ho itšoara ka ethylene oxide le alkali tlas'a maemo a laoloang ho hlahisa lihlopha tsa hydroxyethyl (-OCH2CH2OH) holim'a ketane ea cellulose. Karabelo ena ea hydroxyethylation e fetola thepa ea selulose, e fana ka ho qhibiliha ha metsi le hydrophilicity ho polymer.
4. Ho Hloekisa le ho Omisa: Selulose ea hydroxyethylated e ntan'o hloekisoa ho tlosa li-reactants tse setseng, li-catalyst, le lihlahisoa tse tsoang motsoakong oa karabelo. HEC e hloekisitsoeng e atisa ho hlatsuoa, ho hloekisoa le ho omisoa ho fumana phofo e ntle kapa li-granules tse loketseng likopo tse fapaneng.
5. Grading le Packaging: Qetellong, sehlahisoa sa HEC se hlophisoa ho ipapisitsoe le thepa ea sona e kang viscosity, boholo ba likaroloana le bohloeki. E ntan'o kenngoa ka mekotleng, meqomong kapa lijaneng tse ling bakeng sa ho ajoa le ho bolokoa.

Mokhoa oa ho etsa lihlahisoa o ka 'na oa fapana hanyenyane ho itšetlehile ka litekanyetso tse khethehileng le litlhoko tsa boleng ba sehlahisoa sa HEC, hammoho le mekhoa ea tlhahiso ea lik'hamphani ka bomong. Mehato ea ho laola boleng ka tloaelo e sebelisoa ho pholletsa le ts'ebetso ea tlhahiso ho netefatsa ho tsitsisa, ho hloeka, le ts'ebetso ea sehlahisoa sa ho qetela sa HEC.

HEC e sebelisoa liindastering tse ngata, tse kenyeletsang kaho, meriana, tlhokomelo ea botho, le lijo, ka lebaka la thepa ea eona e teteaneng, e tsitsitseng le ea ho boloka metsi.