I-Hydroxypropyl Methylcellulose (HPMC) iyisingeniso esibalulekile ku-donsa okomile, ngcono izakhiwo ezifana nokusebenza, ukugcinwa kwamanzi, kanye nokunamathela. Ukukala i-viscosity ye-HPMC odongeni oluhlanganisiwe oluhlanganisiwe kubalulekile ukuze kuqinisekiswe ikhwalithi nokusebenza okungaguquki. I-Viscosity ithonya kalula uhlelo lokusebenza, ukubeka isikhathi namandla okugcina kodaka.
Izici ezithinta isilinganiso se-viscosity
1. Ukwakheka kodaka oluhlanganisiwe omile
Ukwakheka kodaka oluhlanganisiwe oluhlanganisiwe kufaka phakathi usimende, ama-aggregates, izengezo njenge-HPMC, futhi kwesinye isikhathi ezinye ama-polymers. Ingxenye yalezi zingxenye ithinta ukubonakala. Ukuhlushwa okuphezulu kwe-HPMC ngokuvamile kukhulisa i-viscosity ngenxa yezakhiwo zayo zokuqina. Ngokwengeziwe, uhlobo kanye neziqubulo zokuhlanganisa kungathonya izici zokugeleza kodaka.
2. Ukuxuba Izinqubo
Indlela nobude bokuxubana bunomthelela omkhulu ekulinganiseni kwe-viscosity. Ukuxuba okunganele kungaholela engxenyeni enobuhlakani, okuholela ekufundeni okulungile okufundwayo. Ukuxuba okufanele kuqinisekisa ukuthi i-HPMC ihlakazeke ngokuphelele kudaka, inikeze imiphumela engaguquki. Ijubane lokuxuba, isikhathi, nohlobo lwensiza kufanele lulinganiswe ngezilinganiso ezithembekile.
3. Isilinganiso esiqinile samanzi
Isilinganiso se-water-to-solid (i-W / S) sibalulekile ekutholeni ukubonakala kodaka. Okuqukethwe kwamanzi okuphezulu ngokuvamile kwehlisa ukubonakala, okwenza uketshezi oluningi. Ngakolunye uhlangothi, okuqukethwe kwamanzi okuphansi kubangela umxube onzima, owengeziwe we-viscous. Ukuguquguquka kwesilinganiso se-W / S kubalulekile ukuze kulinganiswe kabusha ekulinganiseni kwensiza ye-visuosity.
4. Ukushisa
Ukushisa kuthinta ukubonakala kwezixazululo ze-HPMC kakhulu. Njengoba izinga lokushisa likhuphuka, ukubonakala kwe-HPMC kwehla ngenxa yokuncishiswa kokusebenzisana kwamangqamuzana. Ngakho-ke, kubalulekile ukwenza izilinganiso ze-viscosity endaweni yokushisa elawulwa futhi engaguquki ukuze ugweme ukuhlukahluka kwemiphumela.
5. Amazinga we-PH
Izinga le-PH lengxube yodaka lingathonya ukubonakala kwe-HPMC. I-HPMC ibonisa ama-visosities ahlukene emazingeni ahlukahlukene we-PH, ngamanani we-PH athe xaxa aholela ekunciphiseni kwe-polymer nokuguqulwa okuguquliwe. Ukugcina kungathathi hlangothi ku-Alkaline PH kulungele ukufundwa okuzinzile okuzinzile.
6. Ubudala bodaka
Iminyaka noma isikhathi esidlulile ngemuva kokuxubana kungathinta ukubonana kodaka. Inqubo ye-hpmc ye-hydration ingaqhubeka ngokuhamba kwesikhathi, kancane kancane iguqule i-viscosity. Izilinganiso kufanele zithathwe ngezikhathi ezithile ezingaguquki ngemuva kokuxubanisa ukuze kuqinisekiswe ukuqhathanisa.
7. Izinsimbi zokulinganisa
Ukukhethwa kwensimbi yokulinganisa ukubonakala kubalulekile. Amathuluzi ajwayelekile afaka ama-vivitcoeter ajikelezayo, ama-vispetoter e-capillary, namaRheometer. Ithuluzi ngalinye linezimiso zalo lokusebenza kanye nokufaneleka kuya ngokuya ngobubanzi be-viscosity kanye nezakhiwo ezithile zodaka oluhloliwe. Ukulinganisa nokugcinwa kwalezi zinsimbi kuyadingeka ukuze izilinganiso ezinembile.
Ukukala i-viscosity yodaka oluhlanganisiwe oluqukethe i-HPMC kuyinqubo ehlukahlukene ethonywe yizici ezahlukahlukene kufaka phakathi ukwakheka, izinqubo zokuxuba, okuqukethwe kwamanzi, izinga le-PROUNT. Amaphrothokholi ajwayelekile nokucatshangelwa ngokucophelela kwalezi zinto kubalulekile ukuthola izilinganiso ezithembekile nezingaguquki. Ngokubhekana nezinselelo kanye nokusebenzisa imikhuba emihle kakhulu, izilinganiso eziqondile ze-viscosity zingatholakala, kuqinisekiswe ukusebenza okufiselekayo kohlobo oluhlanganisiwe okolweni kwezicelo zokwakha.
Isikhathi sePosi: Feb-18-2025