I-Ether yeSellulose

I-ether yeseliyenziwe nge-cellulose ngokusebenzisa i-etherification reaction ye-etherification agents enye okanye ezininzi kunye ne-dry grinding. Ngokwezakhiwo ezahlukeneyo zeekhemikhali ze-ether substituents, ii-cellulose ethers zinokwahlulwa zibe zii-anionic ethers, cationic kunye nee-nonionic ethers. Ii-Ionic cellulose ethers ziquka ikakhului-carboxymethyl cellulose ether (CMC)ii-non-ionic cellulose ethers ziquka ikakhului-methyl cellulose ether (MC),i-hydroxypropyl methyl cellulose ether (HPMC)kunye ne-hydroxyethyl cellulose ether.I-ether yekhlorine (HC)njalo njalo. Ii-ether ezingezizo i-ionic zahlulwe zaba zii-ether ezinyibilikayo emanzini kunye nee-ether ezinyibilikayo kwi-oyile, kwaye ii-ether ezinyibilikayo emanzini ezingezizo i-ionic zisetyenziswa kakhulu kwiimveliso ze-mortar. Xa kukho ii-ion ze-calcium, i-ionic cellulose ether ayizinzanga, ngoko ke ayisetyenziswa rhoqo kwiimveliso ze-mortar ezixutywe nodaka ezisebenzisa isamente, ilayimu etyibilikayo, njl.njl. njengezinto zokufaka isamente. Ii-ether ze-cellulose ezinyibilikayo emanzini ezingezizo i-ionic zisetyenziswa kakhulu kushishino lwezixhobo zokwakha ngenxa yokuzinza kwazo kokuxhonywa kunye nokugcinwa kwamanzi.

Iipropati zeekhemikhali ze-Cellulose Ether

I-cellulose ether nganye inesakhiwo esisisiseko se-cellulose—isakhiwo se-Anhydroglucose. Kwinkqubo yokuvelisa i-cellulose ether, i-cellulose fiber ifudunyezwa kuqala kwisisombululo se-alkaline, ize iphathwe nge-etherifying agent. Imveliso ye-fibrous reaction iyacocwa kwaye icolwe ukuze yenze umgubo ofanayo onobuncinci obuthile.

Kwinkqubo yokuvelisa i-MC, kusetyenziswa i-methyl chloride kuphela njenge-etherification agent; ukongeza kwi-methyl chloride, i-propylene oxide ikwasetyenziswa ukufumana amaqela athatha indawo ye-hydroxypropyl kwimveliso ye-HPMC. Ii-ethers ezahlukeneyo ze-cellulose zinemilinganiselo eyahlukeneyo ye-methyl kunye ne-hydroxypropyl substitution, echaphazela ukuhambelana kwezinto eziphilayo kunye nobushushu be-gelation yezisombululo ze-cellulose ether.