HydroxyPropyyl Methylcellulose (HPMC) yog cov dej tsis-ionic-soluble cellulose ither dav dav siv hauv kev tsim kho, cov tshuaj, khoom noj, tshuaj pleev ib ce thiab tshuaj lom neeg. Cov yam ntxwv viscosity ntawm nws cov kua aqueous yog qhov tseem ceeb rau nws cov ntawv thov kev ua tau zoo.
1. Cov yam ntxwv ntawm HPMC
Kev txhawj xeeb ®hpmc yog lub cellulos derivative synthesized los ntawm kev qhia hydroxypropyl thiab methyl pawg rau hauv molecular saw ntawm cellulose. Nws muaj cov dej ua kom zoo thiab cov khoom muaj kuab heev, thiab feem ntau yog siv los npaj cov kev daws teeb meem muaj cov khoom muaj aqueological. Cov yam ntxwv no ua HPMC dav siv rau hauv cov txheej txheem, cov nplaum, yeeb tshuaj muaj kev tso tshuaj yeeb, tshuaj ntxiv, cov khoom noj khoom haus ntxiv thiab lwm yam kev lag luam.
2. Viscosity cov yam ntxwv ntawm HPMC aqueous daws
Cov yam ntxwv viscosity ntawm HPMC aqueous kev daws teeb meem yog cuam tshuam los ntawm ntau yam, feem ntau suav nrog kev xav, kub, pawj nqi thiab molecular qauv.
Cov nyhuv ntawm conctration ntawm viscosity
Lub viscosity ntawm HPMC aqueous kev daws teeb nrog nce siab. Thaum cov concentration ntawm HPMC yog tsawg, cov tshuaj aqueous yog nyias thiab muaj kev viscosity tsawg; Raws li kev sib cuam tshuam nce, kev sib cuam tshuam ntawm cov lwg me me nce, thiab viscosity ntawm cov aqueous kev daws teeb meem. Feem ntau, cov tshuaj ntawm HPMC tau nthuav dav txog qee qhov kev xav tau, tab sis nws zoo li yuav nyob ruaj khov ntawm qee qhov kev xav tau, qhia tus yam ntxwv viscosity ntawm kev daws.
Ntxim Kub Kub ntawm Viscosity
Qhov kub yog qhov tseem ceeb cuam tshuam rau cov viscosity ntawm kev txhawj xeeb ntawm kev txhawj xeeb ®hpmc aqueous daws. Raws li cov kub nce, cov hydrogen bonds thiab hydrophobic sib cuam tshuam hauv HOLMC lwg me me yuav ua rau muaj zog, yog li txo lub viscosity ntawm cov aqueous. Feem ntau hais lus, lub viscos aqueous qhia qhov tseem ceeb qis dua nrog kev nce kub, tshwj xeeb tshaj yog nyob rau hauv qhov ntau dua. Cov xeeb ceem no ua rau HPMC muaj cov kev cai tswj tau zoo dua nyob rau hauv cov ntawv thov kub thiab txias.
Cov nyhuv ntawm shear tus nqi ntawm viscosity
HPMC aqueous cov tshuaj qhia tau cov tsis muaj kev ua kua rau hnub qub ntawm cov neeg ua kua me me ntawm cov nqi qis, yog qhov viscosity yog qhov ruaj khov; Txawm li cas los xij, ntawm High Shear cov nqi, lub viscos kev daws yuav txo qis, qhia tau tias nws muaj shear thinning cov khoom. HPMC lwg me me muaj qee yam hluav taws xob. Ntawm cov nqi sib zog tsawg, cov molecular chains muaj ntau dua twisted, tsim cov qauv teeb tsa ntau dua, uas yog manifested raws li cov viscos ntau dua; Ntawm cov nqi siab tawv, cov molecular chains zoo li ncab, lub fluidity yog txhim kho, thiab viscosity txo.
Cov nyhuv ntawm PHICE nyob viscosity
HPMC aqueous tshuaj feem ntau tswj cov viscosity nyob rau hauv lub neutral mus rau tsis muaj zog alkaline. Nyob rau hauv ib tug muaj zog acid los yog muaj zog puag ib puag ncig, HPMC Molecules yuav tau cov kev sib raug zoo, ua rau muaj kev cuam tshuam rau cov molecules, yog li cuam tshuam rau cov viscosity ntawm cov aqueous. Nyob rau hauv ib txwm muaj xwm txheej, hloov nyob rau hauv pH muaj cov nyhuv me me rau ntawm visccosity ntawm HPMC cov kev daws teeb meem, tab sis nyob rau hauv kev hloov pauv ntawm kev tawm tsam HPMC, tab sis tiam sis yuav pom tseeb.
Cov nyhuv ntawm cov qauv molecular ntawm viscosity
Cov yam ntxwv viscosity ntawm HPMC tau txheeb ze rau nws cov qauv molecular. Cov degree ntawm kev hloov chaw ntawm hydroxypropyl thiab methyl pawg nyob rau hauv molecule muaj qhov cuam tshuam tseem ceeb ntawm kev tawm tsam ntawm cov aqueous. Qhov siab dua qib ntawm cov pab pawg, qhov muaj zog ntawm Hydrophilicity ntawm Hydrophilicity ntawm Hydrophilicity ntawm Hydmc thiab ntau dua lub viscosity ntawm kev daws. Tsis tas li ntawd, txoj kev molecular hnyav ntawm HPMC tseem yog qhov tseem ceeb rau nws cov viscosity. Qhov loj dua cov molecular hnyav, ntev dua cov molecular, thiab muaj zog dua kev sib cuam tshuam ntawm cov lwg me me, ua rau muaj kev tawm tsam ntau dua ntawm cov aqueeve.
3. Qhov tseem ceeb ntawm cov viscosity cov yam ntxwv ntawm HPMC aqueous daws hauv daim ntawv thov
Cov yam ntxwv viscosity ntawm HPMC aqueous daws yog qhov tseem ceeb rau nws daim ntawv thov hauv ntau thaj teb.
Kev tsim kho teb: HPMC feem ntau siv nyob rau hauv xis mas cov nplaum, thiab muaj cov haujlwm ntawm thickening, khaws cia noo noo, thiab txhim kho kev tsim kho. Tus yam ntxwv viscosity ncaj qha cuam tshuam kev ua haujlwm thiab nplaum ntawm cug. Los ntawm kev kho cov qauv zoo thiab cov qauv molecular ntawm HPMC, cov khoom siv hluav taws xob ntawm kev tshuaj khib tuaj yeem tswj tau, yog li txhim kho yooj yim ntawm kev tsim kho.
Kws Kev Lag Luam: txhawj xeeb ® Nws cov yam ntxwv viscosity tuaj yeem cuam tshuam qhov tshuaj lom neeg thiab tswj cov tshuaj tso tawm hauv lub cev. Los ntawm xaiv HPMC nrog cov kev hnyav molecular hnyav thiab qib degree hloov chaw, cov yam ntxwv tso tawm ntawm cov tshuaj tuaj yeem hloov kho kom haum raws li kev kho mob.
Kev Lag Luam Khoom Noj: HPMC yog siv los ua cov tuab, stabilizer, thiab emulsifier hauv kev ua zaub mov noj. Cov yam ntxwv viscosity ntawm nws cov kua aqueous cuam tshuam rau saj thiab ruaj khov ntawm cov zaub mov. Los kho cov hom thiab tus nqi HPMC, cov zaub mov ntawm cov zaub mov tuaj yeem tswj tau zoo.
Kev lag luam kom hniav zoo nkauj: HPMC, raws li cov tuab thiab muaj zog hauv cov tshuaj pleev ib ce, tuaj yeem txhim kho cov tshuaj pleev ib ce, muab cov khoom haum kom tsim nyog thiab muaj kev xav zoo. Cov yam ntxwv viscosity muaj qhov cuam tshuam tseem ceeb rau cov neeg siv cov khoom lag luam xws li cov tshuaj pleev, cov kua nplaum, thiab tshuaj zawv plaub hau.
Cov yam ntxwv viscosity ntawmHPMC Cov kev daws teeb meem muaj cov kev daws teeb meem xws li muaj ntau yam xws li kev xav, ntsuas kub, shear tus nqi, pawj muaj nuj nqis, thiab qauv molecular. Los ntawm kho cov xwm txheej no, daim ntawv thov kev ua tau zoo ntawm HPMC tuaj yeem ua tau zoo kom tau raws li cov kev xav tau ntawm kev lag luam sib txawv rau nws cov khoom siv rheological. Qhov kev tshawb fawb hauv tebchaws Viscosity ntawm HPMC a cov kev daws teeb meem tsis tsuas yog pab kom nkag siab nws cov lus qhia yooj yim, tab sis kuj muab cov kev taw qhia theorance rau nws cov ntawv thov hauv kev tsim khoom tiag tiag.
Lub Sijhawm Post: Jan-16-2025