Ungahlola kanjani i-viscosity ye-hydroxypropyl methylcellulose?

IHydroxypropyl methylcellulose yokwakha idinga ukugwema ukungena kwamanzi odongeni, nokugcinwa kwenani elifanele lamanzi odakeni kungenza usimende ukhiqize ngokugcwele ukusebenza kahle kwamanzi namanzi. I-Hydroxypropyl methylcellulose I-viscosity ye-cellulose odakeni ilingana ngokuqondile, ukuphakama kwe-viscosity, kuba ngcono ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose.

Uma umswakama we-hydroxypropyl methylcellulose usuphezulu kakhulu, ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose kuzokwehla, okuzoholela ngokuqondile ekwehleni kokusebenza kahle kokwakhiwa kwe-hydroxypropyl methylcellulose. Sijwayelene nezinto okungenzeka ukuthi zenze amaphutha. Kufanele sihlale siyintsha futhi sizothola imiphumela ebesingayilindele.

I-viscosity ebonakalayo iyinkomba ebalulekile ye-hydroxypropyl methylcellulose. Izindlela ezijwayelekile zokunquma i-viscometry ejikelezayo, i-capillary viscometry kanye ne-autumn viscometry ewayo.

Esikhathini esedlule, indlela yokunquma ye-hydroxypropyl methylcellulose kwakuyi-capillary viscometry, kusetshenziswa i-viscometer ye-Ubbelohde. Ngokuvamile isixazululo sokunquma siyisixazululo esinamanzi esingu-2, futhi ifomula ithi: V=Kdt. U-V umele i-viscosity, iyunithi ithi , K iwukungaguquki kwe-viscometer, d imele ukuminyana ekushiseni okungaguquki, t ibhekisela esikhathini ukusuka phezulu kuya phansi ngokusebenzisa i-viscometer, iyunithi yi-s yesibili. Le ndlela inzima kakhulu ukuyisebenzisa, futhi uma kukhona izinto ezingancibiliki, kulula ukubangela amaphutha, futhi kunzima ukuhlonza ikhwalithi ye-hydroxypropyl methylcellulose.

Inkinga ye-delamination yeglue yokwakha yinkinga enkulu amakhasimende abhekana nayo. Okokuqala, inkinga yezinto zokusetshenziswa kufanele icatshangelwe ku-delamination yeglue yokwakha. Isizathu esiyinhloko sokuchithwa kweglue yokwakha i-polyvinyl alcohol (PVA) ne-hydroxypropyl methylcellulose (HPMC). okubangelwa ukungahambisani. Okwesibili, kungenxa yokuthi isikhathi sokunyakazisa asanele; ngaphezu kwalokho, ukusebenza kokuqina kweglue yokwakha akukuhle.

Kuglue yokwakha, i-hydroxypropyl methylcellulose (HPMC) esheshayo kufanele isetshenziswe, ngoba i-hydroxypropyl methylcellulose (HPMC) ihlakazwa kuphela emanzini ngaphandle kokuncibilika kwangempela. Cishe imizuzu emi-2, i-viscosity yoketshezi iyanda kancane kancane, yakha i-viscous colloid esobala.

Imikhiqizo encibilikayo eshisayo, lapho ihlangene namanzi abandayo, ingahlakazeka ngokushesha emanzini ashisayo futhi inyamalale emanzini ashisayo. Lapho izinga lokushisa lehlela ezingeni elithile lokushisa, i-viscosity izovela kancane kancane ize yakhe i-viscous colloid ebonakalayo. Inani elinconyiwe le-hydroxypropyl methylcellulose (HPMC) engezwe kuglue yokwakha ngu-2-4kg.

I-Hydroxypropyl methylcellulose (HPMC) inezinto zamakhemikhali ezizinzile, ukumelana nesikhutha, nokugcinwa kahle kwamanzi kuglue wokwakha, futhi ayithintwa izinguquko zenani le-pH. Ingasetshenziswa nge-viscosity esukela ku-100,000 S kuya ku-200,000 S. Kodwa ekukhiqizeni, ukuphakama kwe-viscosity, kungcono. I-viscosity ihambisana ngokuphambene namandla ebhondi. Ukuphakama kwe-viscosity, amandla amancane. Ngokuvamile, i-viscosity ye-100,000 S ifanelekile.