Mefuta ea Cellulose ether ke efe?

Li-ether tsa cellulose ke sehlopha se fapaneng sa li-polymer tse nkiloeng ho cellulose, polysaccharide ea tlhaho e fumanoang limela. Li sebelisoa haholo indastering e fapaneng, ho kenyeletsoa kaho, meriana, lijo, litlolo le tlhokomelo ea botho, ka lebaka la thepa ea tsona e ikhethang le ho tenyetseha ha tsona. Mona ke tse ling tsa mefuta e tloaelehileng ea ether ea cellulose:

1. Selelulose ea Methyl (MC):
   • Methyl cellulose e hlahisoa ka ho phekola cellulose ka methyl chloride ho kenya lihlopha tsa methyl mokokotlong oa cellulose.
   • E qhibiliha metsing a batang 'me e etsa litharollo tse hlakileng, tse tiileng.
   • MC e sebelisoa e le sethibisi, se kopanyang, le se tsitsisang lits'ebetsong tse fapaneng, ho kenyeletsoa le thepa ea kaho (mohlala, li-mortar tse thehiloeng samenteng, li-plaster tse thehiloeng ho gypsum), lihlahisoa tsa lijo, meriana le lintho tsa tlhokomelo ea botho.
2. Selulose ea Hydroxyethyl (HEC):
   • Hydroxyethyl cellulose e hlahisoa ka ho kopanya cellulose le ethylene oxide ho kenya lihlopha tsa hydroxyethyl mokokotlong oa cellulose.
   • E qhibiliha metsing a batang 'me e etsa litharollo tse hlakileng, tse tiileng tse nang le litšobotsi tse ntle tsa ho boloka metsi.
   • HEC e atisa ho sebelisoa e le sesebelisoa sa ho teteana, ho fetola rheology, le ho etsa filimi lipenteng, likhomaretsing, lihlahisoa tsa tlhokomelo ea botho le meriana.
3. Hydroxypropyl Methyl Cellulose (HPMC):
   • Hydroxypropyl methyl cellulose e hlahisoa ka ho hlahisa lihlopha tsa hydroxypropyl le methyl mokokotlong oa cellulose.
   • E na le thepa e tšoanang le methyl cellulose le hydroxyethyl cellulose, ho kenyeletsoa ho qhibiliha ha metsi, bokhoni ba ho etsa filimi le ho boloka metsi.
   • HPMC e sebelisoa haholo thepa ea kaho (mohlala, likhomaretsi tsa thaele, li-render tse thehiloeng ho samente, metsoako e iketsang), hammoho le meriana, lihlahisoa tsa lijo le lintho tsa tlhokomelo ea botho.
4. Selulose ea Carboxymethyl (CMC):
   • Carboxymethyl cellulose e nkuwa ho tsoa ho cellulose ka ho e phekola ka sodium hydroxide le monochloroacetic acid ho hlahisa lihlopha tsa carboxymethyl.
   • E qhibiliha ka metsing 'me e etsa litharollo tse hlakileng, tse tiileng tse nang le litšobotsi tse ntle tsa ho tenya, ho tsitsisa le ho boloka metsi.
   • CMC e atisa ho sebelisoa e le sesebelisoa sa ho teteana, ho kopanya le ho fetola rheology lihlahisoa tsa lijo, meriana, masela, pampiri le lisebelisoa tse ling tsa kaho.
5. Selulose ea Ethyl (EC):
   • Selulose ea ethyl e hlahisoa ka ho kopanya cellulose le ethyl chloride ho kenya lihlopha tsa ethyl mokokotlong oa cellulose.
   • Ha e qhibilihe metsing empa e qhibiliha ka har'a metsoako ea lintho tse phelang e kang ethanol le chloroform.
   • EC e atisa ho sebelisoa e le sesebelisoa sa ho etsa filimi, se kopanyang le thepa ea ho roala meriana, lihlahisoa tsa lijo, litlolo le lits'ebetsong tsa indasteri.

Tsena ke tse ling tsa mefuta e sebelisoang haholo ea ether ea cellulose, e 'ngoe le e 'ngoe e fana ka thepa le melemo e ikhethang bakeng sa lits'ebetso tse fapaneng. Li-ether tse ling tse ikhethang tsa cellulose le tsona li ka ba teng, tse etselitsoeng litlhoko tse itseng liindastering tse fapaneng.