Cia peb tham txog hydroxypropyl methyl celluloseHPMCThiab yuav ntsuas seb nws viscosity li cas. Lub piscosity ntawm no yog hais txog lub meej viscosity, uas yog ib qho tseem ceeb siv rau hydroxypropal methylropy cellulose.
Txheem. Txoj kev ntsuas ib txwm yog kev ntsuas viscosity, capillary viscosity ntsuas ntsuas thiab lub caij nplooj zeeg viscosity ntsuas. Txoj kev txiav txim siab ntawm hydroxypropyl methyl cellulose yog capillary adhesion.
Cov qauv ntawm kev txiav txim siab ntawm kev kawm, siv UCHS Vis. Feem ntau kev txiav txim siab ntawm kev daws teeb meem yog 2% kev daws teeb meem, cov qauv yog: v = kdt. V yog viscosity nyob rau hauv MPA. S thiab K yog tus visgluset tas mus li.
D yog qhov ceev ntawm qhov kub tsis tu ncua thiab t yog lub sijhawm los ntawm sab saum toj mus rau hauv qab los ntawm vis viscometer hauv vib nas this. Txoj kev ua haujlwm no yog cumbersome ntau dua, yog tias muaj cov teeb meem insoluble.
Cov lus yooj yim ua kom ua yuam kev, nws yog qhov nyuaj rau kev txheeb xyuas qhov zoo ntawm hydroxypropyl methylropy cellulose. Tam sim no nws yog feem ntau siv los ntsuas qhov viscoseter ntawm cov viscomateter caturalcometer, cov kev siv dav dav hauv Suav teb.
Cov mis ntawm NDJ-1 Viscometer yog η = Kα. η yog viscosity, tseem nyob hauv MPA. S, K yog tus coefficient ntawm tus visicais, thiab α yog nyeem tus poincais.
HydroxyPropylropropy cellulose 2% Viscosity Test Edcover:
1, hom no haum rau kev txiav txim siab ntawm cov kab viscamosity ntawm cov kua tsis muaj tshuaj tua kab mob (qhib kev tshem tawm cov kua lossis cov tshuaj surfactant, thiab lwm yam).
2. Seev cev thiab cov khoom siv
2.1 Cov Vis Pedary (NDJ-1 thiab NDJ-4 yog qhov yuav tsum tau los ntawm Pharmacoploeia)
2.2 Qhov ntsuas dej sov tas li dej tas li yog qhov ntsuas kub 0.10C
2.3 Qhov ntsuas qhov ntsuas kub yog 0.20C, uas tau txheeb xyuas ib ntus.
2.4 Ntau zaus kev tawm tsam kev tawm tsam siv zaus ua kom muaj ntau zaus kev ntsuas (xws li NDJ-1 thiab NDJ-4) yuav tsum tshwj tseg. Qhov tseeb ntawm 1%. Ib
8. Tus qauv OR tau raug hnyav thiab muab tso rau hauv ib qhuav, toned 400ml siab beaker. Ntxiv txog 100ml ntawm 80-90 Degree Dej Kub thiab do rau 10min sib cais
Tusyees disperse, do thiab ntxiv dej txias rau 400ml nyob rau hauv tag nrho. Lub caij no, do txuas ntxiv rau 30 feeb los ua 2% (w / w) tov, thiab muab tso rau hauv lub tub yees rau txias kom txog thaum nws tsim cov dej khov nyias rau saum npoo.
Nqa tawm thiab muab tso rau hauv lub tank tas li kub kom ua kom qhov nruab nrab ntawm 20 ℃ 0.1 ℃.
3.1 Kev teeb tsa thiab kev ua haujlwm ntawm qhov ntsuas yuav tsum tau ua raws li cov kev ua haujlwm ntawm kev ntsuas, thiab qhov tsim nyog rotor thiab qhov kev muab cov kev cai ntawm cov khoom siv tshuaj thiab cov kev cai ntawm cov ntawv ntawm cov ntawv khoom
Tig ceev.
3.2 Hloov kho cov dej sov tas li kub raws li kev txiav txim siab nyob rau hauv txhua yam tshuaj.
3.3 Cov khoom ntsuas tau muab tso rau hauv lub thawv teev los ntawm qhov ntsuas, thiab lub kaum sab xis deflection (a) tau ntsuas raws li kev cai lij choj tom qab kub tas li. Tua lub cev muaj zog thiab rov pib dua nws rau kev txiav txim ib zaug ntxiv
Qhov sib txawv ntawm qhov tseem ceeb yuav tsum tsis pub tshaj 3%, txwv tsis pub ntsuas qhov ntsuas qhov thib peb yuav tsum tau ua.
3.4 Xam cov nqi txhais tau tias ntawm ob qhov kev ntsuam xyuas raws li cov qauv kom tau txais cov khoom siv viscamosed.
4. Sau thiab xam
4.1 Sau cov qauv Visetus teb, rotor naj npawb thiab ceev siv tus lej thiab nrawm siv, viscais tas li (k 'tus nqi), ntsuas kub, thiab ib qho ntsuas ntsuas kub. Tus nqi.
Lub xam cov mis ntawm 4.2
Dynamic viscosity (MPa "s) = ka qhov twg k yog vis visccegeter tas li ntsuas nrog tus qauv kua ntawm lub npe viscosity thiab a yog deflection kaum sab xis
Lub Sijhawm Post: Apr-25-2024