Pom tseeb viscosity yog ib qho tseem ceeb qhia ntawm hydroxypropyl methylcellulose, feem ntau siv txoj kev ntsuas muaj xws li rotational viscometry, capillary viscometry thiab poob viscometry.
Hydroxypropyl methylcellulose tau ntsuas yav dhau los siv capillary viscometry siv Ubbelohde viscometer.Feem ntau cov kev ntsuas ntsuas yog cov kua dej ntawm 2, tus qauv yog: V = Kdt.V sawv cev rau lub viscosity, K yog qhov tas li ntawm viscometer, d sawv cev rau qhov ceev ntawm qhov kub thiab txias, t yog hais txog lub sij hawm los ntawm sab saum toj mus rau hauv qab ntawm lub viscometer, chav tsev yog thib ob, txoj kev no yog cumbersome rau kev khiav hauj lwm thiab nws Nws yog ib qho yooj yim los ua yuam kev, thiab nws yog ib qho nyuaj rau kev paub qhov zoo ntawm hydroxypropyl methylcellulose.
Qhov teeb meem ntawm delamination ntawm kev tsim cov kua nplaum yog ib qho teeb meem loj uas cov neeg siv khoom tau ntsib.Ua ntej tshaj plaws, qhov teeb meem ntawm cov khoom siv raw yuav tsum raug txiav txim siab rau kev tsim kho cov kua nplaum txheej.Qhov laj thawj tseem ceeb ntawm kev tsim cov kua nplaum yog tias polyvinyl cawv (PVA) thiab hydroxypropyl methylcellulose (HPMC) tsis sib xws.Qhov thib ob yog vim li cas yog lub sij hawm stirring tsis txaus, thiab cov thickening kev ua tau zoo ntawm kev tsim cov kua nplaum tsis zoo.
Lub hydroxypropyl methylcellulose (HPMC) ntawm qhov kev tsim kho tam sim no yuav tsum tau siv rau hauv kev tsim cov kua nplaum, vim hydroxypropyl methylcellulose (HPMC) tau tawg mus rau hauv dej thiab tsis tuaj yeem yaj tiag tiag, thiab cov viscosity ntawm cov kua nce ntxiv hauv li 2 feeb, tsim pob tshab viscous colloid. .
Thaum cov khoom kub yaj tau sib xyaw ua ke hauv dej txias, lawv yuav tawg sai sai hauv dej kub thiab ploj mus hauv dej kub.Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity yuav tshwm sim maj mam kom txog thaum lub pob tshab viscous colloid tsim.Hydroxypropyl hauv kev tsim cov nplaum Cov tshuaj pom zoo ntawm HPMC yog 2-4kg.
Hydroxypropyl methylcellulose (HPMC) muaj cov tshuaj lom neeg ruaj khov, tiv thaiv kab mob thiab dej zoo hauv kev tsim cov nplaum, thiab tsis cuam tshuam los ntawm kev hloov pH.Nws tuaj yeem siv tau los ntawm 100,000 S mus rau 200,000 S, tab sis qhov siab dua qhov viscosity hauv kev tsim khoom, qhov zoo dua, thiab cov viscosity yog inversely proportional to the bonding strength.Qhov siab dua qhov viscosity, lub zog qis dua, feem ntau qhov viscosity ntawm 100,000 S yog qhov tsim nyog.
Post lub sij hawm: Apr-20-2023