I-viscosity ebonakalayo iyinkomba ebalulekile ye-hydroxypropyl methylcellulose, izindlela zokulinganisa ezivame ukusetshenziswa zihlanganisa i-rotational viscometry, i-capillary viscometry kanye ne-drop viscometry.
IHydroxypropyl methylcellulose ngaphambilini yayikalwa kusetshenziswa i-capillary viscometry kusetshenziswa i-viscometer ye-Ubbelohde.Ngokuvamile isixazululo sokulinganisa siyisixazululo esinamanzi esingu-2, ifomula ithi: V = Kdt.I-V imele i-viscosity, i-K imelela i-viscometer engaguquki, d imelela ukuminyana ekushiseni okungaguquki, t ibhekisela esikhathini kusukela phezulu kuya phansi kwe-viscometer, iyunithi ingeyesibili, le ndlela inzima ukuyisebenzisa futhi kulula ukuyibangela Okungalungile, futhi kunzima ukuhlukanisa ikhwalithi ye-hydroxypropyl methylcellulose.
Inkinga ye-delamination yeglue yokwakha yinkinga enkulu amakhasimende abhekana nayo.Okokuqala, inkinga yezinto zokusetshenziswa kufanele icatshangelwe ungqimba weglue wokwakha.Isizathu esiyinhloko sesendlalelo seglue yokwakha ukuthi i-polyvinyl alcohol (PVA) ne-hydroxypropyl methylcellulose (HPMC) azihambisani.Isizathu sesibili ukuthi isikhathi esishukumisayo asanele, futhi ukusebenza kokuqina kweglue yokwakha akulungile.
I-hydroxypropyl methylcellulose (HPMC) yokusungulwa kwamanje idinga ukusetshenziswa kuglue yokwakha, ngoba i-hydroxypropyl methylcellulose (HPMC) ihlakazeke emanzini futhi ayikwazi ukuncibilika ngempela, futhi i-viscosity yoketshezi ikhula kancane kancane emizuzwini emi-2, yakhe i-Transparent viscous colloid. .
Lapho imikhiqizo encibilikayo eshisayo ihlanganiswa ndawonye emanzini abandayo, izohlakazeka ngokushesha emanzini ashisayo futhi iphele emanzini ashisayo.Lapho izinga lokushisa lehlela ezingeni elithile lokushisa, i-viscosity izovela kancane kuze kube yilapho kwakheka i-viscous colloid ebonakalayo.IHydroxypropyl ekunamatheleni wokwakha Umthamo onconyiwe we-HPMC ngu-2-4kg.
IHydroxypropyl methylcellulose (HPMC) inezinto zamakhemikhali ezizinzile, ukumelana nesikhutha kanye nokugcinwa kahle kwamanzi ezintweni ezinamathelayo zokwakha, futhi ayithintwa izinguquko ze-pH.Ingasetshenziswa kusukela ku-100,000 S kuya ku-200,000 S, kodwa ukuphakama kwe-viscosity ekukhiqizeni, kungcono, futhi i-viscosity ihambisana ngokuphambene namandla okubopha.Ukuphakama kwe-viscosity, amandla aphansi, ngokuvamile i-viscosity ye-100,000 S ifanelekile.
Isikhathi sokuthumela: Apr-20-2023