Mayelana nezinga lokushisa lejeli le-hydroxypropyl methyl celluloseI-HPMC, abasebenzisi abaningi abavamile ukunaka izinga lokushisa lejeli le-hydroxypropyl methyl cellulose. Manje i-hydroxypropyl methyl cellulose ngokuvamile ihlukaniswa ngokuvumelana ne-viscosity yayo, kodwa Kwezinye izindawo ezikhethekile nezimboni ezikhethekile, akwanele ukubonisa kuphela i-viscosity yomkhiqizo. Okulandelayo kwethula kafushane izinga lokushisa lejeli le-hydroxypropyl methylcellulose.
Okuqukethwe kwamaqembu e-methoxy kuhlobene ngokuqondile nezinga le-dialysis ye-cellulose, futhi okuqukethwe kwamaqembu e-methoxy kungalungiswa ngokulawula ifomula, izinga lokushisa lokuphendula kanye nesikhathi sokuphendula. Ngesikhathi esifanayo, izinga le-carboxylation lithinta izinga lokushintshwa kwe-hydroxyethyl noma i-hydroxypropyl. Ngakho-ke, ukugcinwa kwamanzi kwama-cellulose ether anezinga lokushisa eliphezulu lejeli ngokuvamile kuba kubi kancane. Le nqubo yokukhiqiza idinga ukuhlolwa, ngakho-ke akukhona ukuthi okuqukethwe kweqembu le-methoxy liphansi, izindleko zokukhiqiza ze-cellulose ether ziphansi, ngokuphambene nalokho, intengo yayo izoba phezulu.
Ukushisa kwejeli kunqunywa yiqembu le-methoxy, futhi ukugcinwa kwamanzi kunqunywa iqembu le-hydroxypropoxy. Kunamaqembu amathathu kuphela angathatha indawo ku-cellulose. Thola izinga lokushisa elifanele lokusetshenziswa kwakho, ukugcinwa kwamanzi okufanele, bese unquma imodeli yale cellulose.
Izinga lokushisa lejeli liyiphuzu elibalulekile ekusetshenzisweni kwei-cellulose ether. Uma izinga lokushisa le-ambient lidlula izinga lokushisa lejeli, i-cellulose ether izohlukana namanzi futhi ilahlekelwe ukugcinwa kwamanzi. Izinga lokushisa lejeli le-cellulose ether emakethe lingahlangabezana ngokuyisisekelo nezidingo zemvelo lapho kusetshenziswa khona udaka (ngaphandle kwezindawo ezikhethekile). Abakhiqizi kumele bakucabangele lokhu.
Isikhathi sokuthumela: Apr-26-2024