I-Cellulose Ether

I-ether ye-celluloseKwenziwe nge-cellulose ngokusebenzisa ukusabela kwe-etherification kwe-ether eyodwa noma eziningana ze-etherification kanye nokugaya okomile. Ngokwezakhiwo zamakhemikhali ezahlukene ze-ether substituents, ama-ether e-cellulose angahlukaniswa abe ama-ether e-anionic, e-cationic kanye nama-ether angewona ama-ionic. Ama-ether e-cellulose e-Ionic afaka kakhului-carboxymethyl cellulose ether (CMC)ama-non-ionic cellulose ethers afaka phakathi kakhului-methyl cellulose ether (MC),i-hydroxypropyl methyl cellulose ether (HPMC)kanye ne-hydroxyethyl cellulose ether.I-ether ye-chlorine (HC)njalo njalo. Ama-ether angewona ama-ionic ahlukaniswe ngama-ether ancibilika emanzini kanye nama-ether ancibilika ku-oyela, kanti ama-ether ancibilika emanzini angewona ama-ionic asetshenziswa kakhulu emikhiqizweni ye-mortar. Uma kukhona ama-ion e-calcium, i-ionic cellulose ether ayizinzile, ngakho-ke ayisetshenziswa kakhulu emikhiqizweni ye-mortar exutshwe nowomile esebenzisa usimende, i-slaked lime, njll. njengezinto zokufaka usimende. Ama-ether e-cellulose ancibilika emanzini angewona ama-ionic asetshenziswa kabanzi embonini yezinto zokwakha ngenxa yokuqina kwawo kokumiswa kanye nokugcinwa kwamanzi.

Izakhiwo Zamakhemikhali ze-Cellulose Ether

I-cellulose ether ngayinye inesakhiwo esiyisisekelo se-cellulose—isakhiwo se-Anhydroglucose. Enqubweni yokukhiqiza i-cellulose ether, i-cellulose fiber iqale ifudunyezwe kwisisombululo se-alkaline, bese iphathwa nge-etherifying agent. Umkhiqizo wokusabela kwe-fibrous uyahlanzwa futhi ucoliwe ukuze kwakhiwe i-powder efanayo enobunono obuthile.

Enqubweni yokukhiqiza i-MC, kusetshenziswa i-methyl chloride kuphela njenge-etherification agent; ngaphezu kwe-methyl chloride, i-propylene oxide nayo isetshenziselwa ukuthola amaqembu athatha indawo ye-hydroxypropyl ekukhiqizweni kwe-HPMC. Ama-ether e-cellulose ahlukahlukene anezilinganiso ezahlukene zokushintshaniswa kwe-methyl kanye ne-hydroxypropyl, ezithinta ukuhambisana kwezinto eziphilayo kanye nokushisa kwe-gelation kwezixazululo ze-cellulose ether.