Mayelana nokushisa kwe-gel kwe-hydroxypropyllylylylylylylylylylylylylylylylylylylylylylylylyll methyl celluloseI-HPMC, abasebenzisi abaningi abavami ukunaka izinga lokushisa le-gel ye-hydroxypropylylylylylylylylylylys methyl cellulose. Manje i-hydroxypropylllylylylllllls ngokuvamile yahlukaniswa ngokuya ngokubonakala kwayo, kepha ngenxa yezindawo ezithile ezikhethekile kanye nezimboni ezikhethekile, akwanele ukukhombisa ukubonwa komkhiqizo. Lokhu kulandela ukwethula kafushane ukushisa kwe-gel kwe-hydroxypropylylylylylylyl.
Okuqukethwe kwamaqembu we-methoxy kuhlobene ngqo nezinga le-dialysis ye-cellulose, futhi okuqukethwe amaqembu we-methoxy kungalungiswa ngokulawula ifomula, izinga lokushisa nesikhathi sokuphendula. Ngasikhathi sinye, izinga le-carboxylation lithinta izinga lokufakwa esikhundleni se-hydroxyethyl noma i-hydroxypropyl. Ngakho-ke, ukugcinwa kwamanzi kwe-cellulose izithathekisa ngokushisa okuphezulu kwe-gel ngokuvamile kubi kakhulu. Le nqubo yokukhiqiza idinga ukuhlolwa, ngakho-ke akukhona ukuthi okuqukethwe yi-Methoxy Group kuphansi, izindleko zokukhiqiza ze-cellulose ether ziphansi, kunalokho, intengo yayo izoba ngaphezulu.
Ukushisa kwe-gel kunqunywa yi-Methoxy Group, futhi ukugcinwa kwamanzi kunqunywa yiqembu le-hydroxypropoxy. Kunamaqembu amathathu angenakuqhathaniswa ku-cellulose. Thola izinga lokushisa elifanelekile lokusebenzisa, ukugcinwa kwamanzi okufanele, bese unquma imodeli yale cellulose.
I-GEL lokushisa liyiphuzu elibucayi lokusetshenziswa kweI-Cellulose Ether. Lapho izinga lokushisa elizwakalayo lidlula izinga lokushisa le-gel, i-cellulose ether izokwehlukanisa emanzini bese ilahlekelwa ukugcinwa kwamanzi. Ukushisa kwe-gel kwe-cellulose ether emakethe kungahlangabezana nezidingo zemvelo lapho kusetshenziswa khona udaka (ngaphandle kwezimo ezikhethekile). Abakhiqizi kumele bakucabangele lokhu.
Isikhathi sePosi: Apr-26-2024