EFERESE EA SELULOSE (MHEC)

Selulose ea Methyl Hydroxyethyl(MHEC) ke mofuta oa ether ea cellulose e sebelisoang haholo liindastering tse fapaneng ka lebaka la thepa ea eona e feto-fetohang. Mona ke kakaretso ea MHEC:

Sebopeho:

MHEC ke ether e fetotsoeng ea cellulose e nkiloeng ho tsoa ho cellulose ka letoto la lik'hemik'hale. E khetholloa ka boteng ba lihlopha tsa methyl le hydroxyethyl mokokotlong oa cellulose.

Thepa:

1. Ho qhibiliha ha metsi: MHEC e qhibiliha metsing a batang, e etsa ditharollo tse hlakileng le tse tiileng.
2. Ho teteana: E na le thepa e ntle ea ho teteana, e leng se etsang hore e be ea bohlokoa e le sesebelisoa sa ho fetola rheology ka mekhoa e fapaneng.
3. Ho Hlahisa Filimi: MHEC e ka etsa lifilimi tse tenyetsehang le tse kopaneng, e leng se tlatsetsang tšebelisong ea eona ho lipente le likhomaretsi.
4. Botsitso: E fana ka botsitso ho li-emulsion le li-suspension, e ntlafatsa bophelo ba lihlahisoa tse entsoeng.
5. Ho khomarela: MHEC e tsebahala ka thepa ea eona ea ho khomarela, e tlatsetsang ntlafatsong ea ho khomarela lits'ebetsong tse itseng.

Likopo:

1. Indasteri ea Kaho:
   • Likhomaretsi tsa Lithaele: MHEC e sebelisoa likhomaretsing tsa lithaele ho ntlafatsa ho sebetsa hantle, ho boloka metsi le ho khomarela.
   • Di-mortar le Di-render: E sebediswa ka hara di-mortar tse thehilweng ka samente le di-render ho ntlafatsa ho boloka metsi le ho sebetsa ha bonolo.
   • Metswako e Itekanelang: MHEC e sebediswa metswakong e iketsang ka lebaka la bokgoni ba yona ba ho tenya le ho tsitsisa.
2. Liaparo le Lipente:
   • MHEC e sebelisoa penteng le lipenteng tse thehiloeng metsing e le setefatsi le se tsitsitseng. E thusa ho ntlafatsa ho phutholoha ha letlalo le ts'ebetso eohle ea pente.
3. Likhomaretsi:
   • MHEC e sebelisoa likhomaretsing tse fapaneng ho ntlafatsa ho khomarela le ho ntlafatsa litšobotsi tsa rheological tsa mekhoa ea sekhomaretsi.
4. Meriana:
   • Meriana, MHEC e sebelisoa e le sesebelisoa sa ho kopanya, ho arola le ho etsa filimi mefuteng ea matlapa.

Mokhoa oa Tlhahiso:

Tlhahiso ea MHEC e kenyelletsa ho etherification ea cellulose ka motsoako oa methyl chloride le ethylene oxide. Maemo a itseng le likarohano tsa reagent li laoloa ho fihlela tekanyo e lakatsehang ea phetolo (DS) le ho etsa hore thepa ea sehlahisoa sa ho qetela e lumellane.

Taolo ea Boleng:

Mehato ea taolo ea boleng, ho kenyeletsoa le mekhoa ea tlhahlobo e kang nuclear magnetic resonance (NMR) spectroscopy, e sebelisoa ho netefatsa hore tekanyo ea phetolo e ka har'a moeli o boletsoeng le hore sehlahisoa se fihlela maemo a hlokahalang.

Ho tenyetseha ha MHEC ho e etsa hore e be motsoako oa bohlokoa mefuteng e mengata e fapaneng ea metsoako, e tlatsetsang ts'ebetsong e ntlafetseng ea thepa ea kaho, liphahlo, likhomaretsi le meriana. Bahlahisi ba ka fana ka maemo a fapaneng a MHEC ho fihlela litlhoko tse fapaneng tsa liindasteri tse fapaneng.