Mokhoa oa ho etsa methyl cellulose ether

Tlhahiso eamethyl cellulose ethere kenyelletsa phetoho ea lik'hemik'hale ea selulose ka karabelo ea etherification. Methyl cellulose (MC) ke cellulose ether e qhibilihang ka metsing e sebelisoang haholo liindastering tse fapaneng. Mona ke kakaretso e akaretsang ea ts'ebetso ea tlhahiso ea methyl cellulose ether:

1. Khetho ea Mohloli oa Cellulose:

• Ts'ebetso e qala ka khetho ea mohloli oa selulose, oo hangata o tsoang ho makhasi a lehong kapa k'hothone. Mohloli oa cellulose o khethoa ho ipapisitse le litšobotsi tse lakatsehang tsa sehlahisoa sa ho qetela sa methyl cellulose.

2. Pulping:

• Mohloli o khethiloeng oa cellulose o kena ho pulping, mokhoa o senyang likhoele ka mokhoa o laolehang haholoanyane. Pulping e ka finyelloa ka mekhoa ea mechine kapa ea lik'hemik'hale.

3. Ts'ebetso ea Cellulose:

• The pulped cellulose e ntan'o sebelisoa ka ho e phekola ka tharollo ea alkaline. Mohato ona o reretsoe ho ruruha likhoele tsa cellulose, ho li etsa hore li sebetse haholoanyane nakong ea karabelo e latelang ea etherification.

4. Karabelo ea Etherification:

• Selulose e kentsoeng e kena etherification, moo lihlopha tsa ether, tabeng ena, lihlopha tsa methyl, li hlahisoang ho lihlopha tsa hydroxyl ho ketane ea cellulose polymer.
• Karabelo ea etherification e kenyelletsa tšebeliso ea lisebelisoa tsa methylating joalo ka sodium hydroxide le methyl chloride kapa dimethyl sulfate. Maemo a karabelo, ho kenyelletsa mocheso, khatello, le nako ea ho arabela, li laoloa ka hloko ho fihlela tekanyo e lakatsehang ea ho fetola (DS).

5. Ho Neutralization le Ho Hlatsoa:

• Kamora karabelo ea etherification, sehlahisoa ha se nke lehlakore ho tlosa alkali e feteletseng. Mehato e latelang ea ho hlatsoa e etsoa ho felisa lik'hemik'hale tse setseng le litšila.

6. Ho omisa:

• Selulose e hloekisitsoeng le ea methylated e omisitsoe ho fumana sehlahisoa sa ho qetela sa methyl cellulose ether ka mokhoa oa phofo kapa granules.

7. Taolo ea Boleng:

• Ho sebelisoa mekhoa e fapaneng ea ho hlahloba, ho kenyeletsoa nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, le chromatography, li sebelisoa bakeng sa taolo ea boleng. The degree of substitution (DS) ke paramente ea bohlokoa e shejoang nakong ea tlhahiso.

8. Tlhahiso le Pakete:

• Joale methyl cellulose ether e etsoa ka limaraka tse fapaneng ho fihlela litlhoko tse ikhethileng tsa lits'ebetso tse fapaneng. Limaraka tse fapaneng li ka fapana ka viscosity ea tsona, boholo ba likaroloana le thepa e 'ngoe.
• Lihlahisoa tsa ho qetela li phuthetsoe hore li ajoe.

Ho bohlokoa ho hlokomela hore maemo a ikhethileng le li-reagents tse sebelisitsoeng karabelong ea etherification li ka fapana ho ipapisitsoe le lits'ebetso tsa mong'a moetsi le thepa e lakatsehang ea sehlahisoa sa methyl cellulose. Methyl cellulose e fumana lits'ebetso indastering ea lijo, meriana, kaho le likarolo tse ling ka lebaka la bokhoni ba eona ba ho qhibiliha ha metsi le ho etsa lifilimi.