Umthelela we-Hydroxypropyl Methyl Cellulose HPMC Esikhathini Sokusetha Sokhonkolo

Isikhathi sokubeka ukhonkolo ngokuyinhloko sihlobene nesikhathi sokusetha sikasimende, futhi ithonya le-aggregate alilikhulu. Ngakho-ke, umthelela we-hydroxypropyl methylcellulose HPMC ngesikhathi sokumiswa kwengxube kakhonkolo ongahlakazeki ngaphansi kwamanzi ungacwaningwa ngesikhathi sokumiswa kodaka. Njengoba isikhathi sokubeka udaka sithintwa amanzi, ukuze kuhlolwe umphumela we-HPMC ngesikhathi sokumisa udaka, isilinganiso samanzi nosimende kanye nesilinganiso sodaka lodaka kudingeka kulungiswe.

Imiphumela yokuhlola ibonisa ukuthi ukungezwa kwe-hydroxypropyl methylcellulose HPMC kunomphumela omkhulu wokuvinjelwa kwengxube yodaka, futhi isikhathi sokumisa udaka siyandiswa ngokunyuka kwenani le-hydroxypropyl methylcellulose. Endabeni yokuqukethwe okufanayo kwe-HPMC, udaka olwakhiwe ngaphansi kwamanzi lungcono kunodaka olwakhiwe emoyeni. Ukubumba okumaphakathi kuthatha isikhathi eside ukusetha. Uma kulinganiswa emanzini, uma kuqhathaniswa nesifanekiso esingenalutho, isikhathi sokuqala sokusetha sodaka oluxutshwe ne-hydroxypropyl methylcellulose sabambezeleka ngamahora angu-6-18, futhi isikhathi sokugcina sokusetha sabambezeleka ngamahora angu-6-22. Ngakho-ke, i-HPMC kufanele isetshenziswe ngokubambisana nama-ejenti wamandla okuqala.

I-HPMC iyi-polymer ephezulu ye-molecular enesakhiwo somugqa we-macromolecular. Iqembu layo elisebenzayo linamaqembu e-hydroxyl, angakha izibopho ze-hydrogen nama-molecule amanzi axubile futhi andise i-viscosity yamanzi axubile. Amaketanga amade wamangqamuzana e-HPMC azodonselana, enze ama-molecule e-HPMC ahlangane ukuze akhe uhlaka lwenethiwekhi, ukusonga usimende nokuxutshwa kwamanzi. Njengoba i-HPMC yakha uhlaka lwenethiwekhi olufana nefilimu lokugoqa usimende, ingavimbela ngempumelelo ukushibilika kwamanzi odakeni, futhi ivimbele noma ibambezele izinga lokugeleza kukasimende.