Ngokuphathelene nokushisa kwejeli kwe-hydroxypropyl methyl celluloseI-HPMC, abasebenzisi abaningi abavamile ukunaka izinga lokushisa lejeli le-hydroxypropyl methyl cellulose. Manje i-hydroxypropyl methyl cellulose ngokuvamile ihlukaniswa ngokwe-viscosity yayo, kodwa kwezinye izindawo ezikhethekile kanye nezimboni ezikhethekile, akwanele ukubonakalisa kuphela i-viscosity yomkhiqizo. Okulandelayo kwethula kafushane izinga lokushisa lejeli le-hydroxypropyl methylcellulose.
Okuqukethwe kwamaqembu e-methoxy kuhlobene ngqo nezinga le-dialysis ye-cellulose, futhi okuqukethwe kwamaqembu e-methoxy kungalungiswa ngokulawula ifomula, izinga lokushisa lokusabela kanye nesikhathi sokusabela. Ngesikhathi esifanayo, izinga le-carboxylation lithinta izinga lokufakwa esikhundleni kwe-hydroxyethyl noma i-hydroxypropyl. Ngakho-ke, ukugcinwa kwamanzi kwama-ether e-cellulose anezinga lokushisa eliphezulu le-gel ngokuvamile kubi kancane. Le nqubo yokukhiqiza idinga ukuhlolwa, ngakho-ke akukhona ukuthi okuqukethwe kweqembu le-methoxy kuphansi, izindleko zokukhiqiza ze-ether ye-cellulose ziphansi, ngokuphambene nalokho, intengo yayo izoba phezulu.
Izinga lokushisa lejeli linqunywa yiqembu le-methoxy, kanti ukugcinwa kwamanzi kunqunywa yiqembu le-hydroxypropoxy. Kunezinhlobo ezintathu kuphela ezingasetshenziswa esikhundleni se-cellulose. Thola izinga lokushisa olisebenzisayo elifanele, ukugcinwa kwamanzi okufanele, bese unquma imodeli yale cellulose.
Izinga lokushisa lejeli liyiphuzu elibalulekile lokusetshenziswa kwei-cellulose ether. Lapho izinga lokushisa elizungezile lidlula izinga lokushisa lejeli, i-cellulose ether izohlukana namanzi futhi ilahlekelwe ukugcinwa kwamanzi. Izinga lokushisa lejeli le-cellulose ether emakethe lingahlangabezana nezidingo zemvelo lapho kusetshenziswa khona udoti (ngaphandle kwezindawo ezikhethekile). Abakhiqizi kumele bakucabangele lokhu.
Isikhathi sokuthunyelwe: Ephreli-26-2024