Cellulose ethers le mokhoa oa ho hlahisa se tšoanang

Tlhahiso eali-cellulose etherse kenyelletsa letoto la liphetoho tsa lik'hemik'hale ho cellulose, e hlahisang lihlahisoa tse nang le thepa e ikhethang. Lintlha tse latelang ke kakaretso ea mekhoa e sebelisoang ho hlahisa cellulose ethers:

1. Khetho ea Mohloli oa Cellulose:

• Li-cellulose ethers li ka nkiloe mehloling e fapaneng e kang makhasi a lehong, lithara tsa k'hothone, kapa lisebelisoa tse ling tse thehiloeng limela. Khetho ea mohloli oa cellulose e ka ama litšobotsi tsa sehlahisoa sa ho qetela sa cellulose ether.

2. Pulping:

• Mohloli oa cellulose o kenella ho pulping ho pshatla likhoele hore e be sebopeho se laolehang haholoanyane. Pulping e ka finyelloa ka mochine, lik'hemik'hale, kapa motsoako oa mekhoa ka bobeli.

3. Tlhoekiso:

• Selulose ea pulped e tlas'a mekhoa ea ho hloekisa ho tlosa litšila, lignin le likarolo tse ling tse se nang cellulosic. Ho hloekisa ho bohlokoa bakeng sa ho fumana thepa ea boleng bo holimo ea cellulose.

4. Ts'ebetso ea Cellulose:

• Selulose e hloekisitsoeng e kenngoa ts'ebetsong ka ho e ruruha ka tharollo ea alkaline. Mohato ona o bohlokoa bakeng sa ho etsa hore cellulose e sebetse haholoanyane nakong ea karabelo e latelang ea etherification.

5. Karabelo ea Etherification:

• Selulose e kentsoeng e kena etherification, moo lihlopha tsa ether li hlahisoang ho lihlopha tsa hydroxyl ka ketane ea cellulose polymer. Lisebelisoa tse tloaelehileng tsa etherifying li kenyelletsa ethylene oxide, propylene oxide, sodium chloroacetate, methyl chloride, le tse ling.
• Boitšoaro hangata bo etsoa tlas'a maemo a laoloang a mocheso, khatello, le pH ho finyella tekanyo e lakatsehang ea ho fetola (DS) le ho qoba maikutlo a mahlakoreng.

6. Ho Neutralization le Ho Hlatsoa:

• Ka mor'a karabelo ea etherification, sehlahisoa hangata ha se nke lehlakore ho tlosa li-reagents tse feteletseng kapa lihlahisoa. Mehato e latelang ea ho hlatsoa e etsoa ho felisa lik'hemik'hale tse setseng le litšila.

7. Ho omisa:

• Selulose e hloekisitsoeng le e etherified e omisitsoe ho fumana sehlahisoa sa ho qetela sa cellulose ether ka phofo kapa sebōpeho sa granular.

8. 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. DS e behiloe leihlo ka hloko ho etsa bonnete ba hore hoa tšoana.

9. Tlhahiso le Tšebeliso:

• Joale cellulose ether e etsoa ka limaraka tse fapaneng ho fihlela litlhoko tse khethehileng tsa lits'ebetso tse fapaneng. Li-ether tse fapaneng tsa cellulose li loketse liindasteri tse fapaneng, joalo ka kaho, meriana, lijo, liphahlo le tse ling.

Ho bohlokoa ho hlokomela hore mekhoa le maemo a ikhethileng a ka fapana ho latela sehlahisoa se lakatsehang sa cellulose ether le ts'ebeliso e reriloeng. Hangata bahlahisi ba sebelisa mekhoa ea boipheliso ho hlahisa li-cellulose ethers tse nang le thepa e khethehileng e etselitsoeng ho finyella litlhoko tsa liindasteri tse fapaneng.