Ngemva kokwengeza i-hydroxypropyl methylcellulose ezintweni ezisekelwe kusimende, ingajiya. Inani le-hydroxypropyl methylcellulose linquma isidingo samanzi sezinto ezisekelwe kusimende, ngakho-ke lizophazamisa ukuphuma kodaka.
Kunezici ezimbalwa ezithinta i-viscosity ye-hydroxypropyl methylcellulose:
1. Izinga eliphakeme le-polymerization ye-cellulose ether, isisindo sayo samangqamuzana sikhulu, kanye nokukhuphuka kwe-viscosity yesisombululo esinamanzi;
2. Uma kuphezulu ukuthathwa (noma ukugxila) kwe-cellulose ether, kulapho kukhuphuka khona i-viscosity yesisombululo sayo esinamanzi. Kodwa-ke, kuyadingeka ukunaka ukukhetha okufanele ngesikhathi sokufaka isicelo ukuze ugweme ukudla ngokweqile, okuzothinta umsebenzi wodaka nokhonkolo. isici;
3. Njengoketshezi oluningi, i-viscosity yesisombululo se-cellulose ether izokwehla ngokunyuka kwezinga lokushisa, futhi ukuphakama kwe-cellulose ether, ithonya elikhulu lokushisa;
4. Isixazululo se-Hydroxypropyl methylcellulose ngokuvamile siyi-pseudoplastic, esinendawo yokunciphisa i-shear. Uma izinga le-shear likhulu ngesikhathi sokuhlolwa, i-viscosity iyancipha.
Ngakho-ke, ukuhlangana kodaka kuzokwehla ngenxa yamandla angaphandle, okuzuzisa ukwakhiwa kodaka, okuholela ekusebenzeni okuhle nokuhlangana kodaka ngesikhathi esifanayo.
Isixazululo se-hydroxypropyl methylcellulose sizobonisa izici ze-Newtonian fluid lapho ukugxila kuphansi kakhulu futhi i-viscosity iphansi. Lapho ukugxila kukhula, isixazululo sizobonisa kancane kancane izici ze-pseudoplastic fluid, futhi lapho ukugxila kuphezulu, i-pseudoplasticity isobala kakhulu.
Isikhathi sokuthumela: Jan-28-2023