HPMC (HydroxyPropyyl methylulose) yog cov khoom siv dej-soluble polymer dav siv nyob rau hauv cov teb uas tsim kho, cov tshuaj, tshuaj lom neeg thiab txhua hnub. Nws muaj cov thickening zoo, emulsification, zaj duab xis-ua, tiv thaiv kev tiv thaiv kev tiv thaiv thiab lwm yam khoom. Hauv cov tshuab emulsion, HPMC tuaj yeem tswj hwm lub viscosity ntawm emulsion hauv ntau txoj kev.
1. Molecular qauv ntawm HPMC
Lub viscosity ntawm HPMC feem ntau cuam tshuam los ntawm nws txoj kev ua molecular thiab cov qib hloov chaw. Qhov loj dua cov molecular hnyav, ntau dua cov viscosity ntawm kev daws teeb meem; Thiab cov degree ntawm kev hloov chaw (uas yog, qib degree hloov chaw ntawm hydroxypropyl thiab mexoxy pawg) cuam tshuam rau cov solubility thiab viscosity cov khoom ntawm HPMC. Tshwj xeeb, qib siab dua ntawm kev hloov pauv, qhov zoo dua cov dej solubility ntawm HPMC, thiab viscosity nce raws li. Cov khoom lag luam HPMC cov khoom lag luam nrog hnyav molecular hnyav thiab cov degrees hloov kom tau raws li cov kev xav tau ntawm cov ntawv thov sib txawv.
2. Siv kev xav
Cov concentration ntawm HPMC hauv kev daws teeb meem yog ib qho ntawm cov ntsiab lus tseem ceeb cuam tshuam rau viscosity. Feem ntau hais lus, qhov siab dua ntawm HPMC, ntau dua cov viscosity ntawm kev daws. Txawm li cas los xij, lub viscosity ntawm ntau hom HPMC ntawm tib lub ntsiab lus tuaj yeem txawv siab heev. Yog li ntawd, hauv kev siv cov ntawv thov, nws yog qhov tsim nyog los xaiv ib qho kev tsim nyog ntawm HPMC tov raws li cov kev xav tau viscosity. Piv txwv li, hauv kev siv daim ntawv thov, kev siv HPMC yog feem ntau tswj hwm ntawm 0.1% thiab 1% los muab kev ua haujlwm zoo thiab kev ua haujlwm.
3. Txoj kev tshem tawm
Txheej Txheem Kev Tshaj Tawm ntawm HPMC tseem muaj qhov cuam tshuam tseem ceeb rau cov viscosity kawg. HPMC yog ib qho yooj yim rau tawg nyob rau hauv dej txias, tab sis kev sib cais yog qeeb; Nws yaj sai sai nyob rau hauv dej kub, tab sis nws yooj yim rau agglomerate. Txhawm rau kom tsis txhob agglomeration, cov chav kawm ntxiv tuaj yeem siv tau, uas maj mam maj mam ntxiv rau cov dej txias kom tawg, ces kub thiab do kom txog thaum yaj tag nrho. Tsis tas li ntawd, HPMC tseem tuaj yeem pib ua tiav nrog lwm cov hmoov qhuav thiab tom qab ntawd ntxiv rau dej kom ua kom muaj kev ua kom muaj kev ua kom muaj kev ua kom muaj kev ua tiav.
4. Kub
Kub muaj qhov cuam tshuam tseem ceeb rau kev viscosity ntawm HPMC cov kev daws teeb meem. Feem ntau, lub viscosity ntawm HPMC kev daws teeb meem txo qis li qhov kub nce ntxiv. Qhov no yog vim tias nce qhov kub yuav ua rau muaj kev sib koom ua ke ntawm cov molecules, ua rau HPMC molecular saw yooj yim dua, yog li txo lub viscosity ntawm kev daws. Yog li ntawd, hauv cov ntawv thov cov tshuaj viscosity siab, cov kev daws teeb meem HPMC feem ntau siv nyob rau hauv qis dua qhov kub. Piv txwv li, hauv cov ntawv thov tshuaj, HPMC cov kev daws teeb meem feem ntau siv nyob rau hauv chav tsev kub kom ntseeg tau tias qhov kev ruaj ntseg thiab ua haujlwm ntawm cov tshuaj.
5. PHEEJ
Lub viscos ntawm HPMC kev daws teeb meem tseem cuam tshuam los ntawm PH tus nqi. HPMC muaj cov viscosity siab tshaj plaws nyob rau hauv nruab nrab thiab qaug zog acidic tej yam kev mob, thaum lub piscosity yuav ua rau muaj zog nyob rau hauv muaj zog acidic lossis alkaline tej yam kev mob. Qhov no yog vim kev muaj nuj nqis heev yuav rhuav tshem cov qauv molecular ntawm HPMC thiab tsis muaj zog nws cov nyhuv tuab. Yog li ntawd, hauv cov ntawv thov siv tau, cov nqi ntawm PHEM Piv txwv li, hauv daim ntawv thov zaub mov noj, HPMC feem ntau siv hauv cov zaub mov acidic xws li kua nyeem yogurt thiab kua qaub zoo nkauj tuaj yeem tau los ntawm kev kho tus nqi PH.
6. Lwm yam kev sib ntxiv
Hauv cov tshuab emulsion, lub viscosity ntawm HPMC kuj tseem tuaj yeem hloov kho los ntawm kev ntxiv lwm cov thickeners lossis cov kuab tshuaj. Piv txwv li, ntxiv cov nyiaj tsim nyog ntawm inorganic ntsev (xws li sodium chloride) tuaj yeem nce viscosity ntawm HPMC tov; Thaum ntxiv cov kuab tshuaj organic xws li ethanol tuaj yeem txo nws cov viscosity. Ib qho ntxiv, thaum siv ua ke nrog lwm cov tuab (xws li xanthan ntawm cov pos hniav, carbomer, thiab lwm yam), lub viscosity thiab ruaj khov ntawm cov emulsion tseem tuaj yeem txhim kho. Yog li ntawd, hauv cov qauv tsim qauv tiag tiag, tsim cov tshuaj ntxiv tuaj yeem xaiv raws li xav tau kom ua kom zoo tshaj lub viscosity thiab kev ua tau zoo ntawm emulsion.
HPMC tuaj yeem ua tiav kev tswj hwm emulsion los ntawm nws cov qauv moluls, kev siv cov kev nkag siab, ntsuas kub, PH nqi thiab ntxiv. Hauv kev siv cov kev siv, cov xwm txheej no yuav tsum txiav txim siab kom xaiv HPMC tsim nyog kom tsim nyog HPMC tsim nyog kom ua tiav cov nyhuv tuab tshaj. Los ntawm scientific mis tsim thiab kev tswj cov txheej txheem, HPMC tuaj yeem ua lub luag haujlwm tseem ceeb hauv kev tsim kho, cov tshuaj, khoom noj txhua hnub, muab cov kev ua tau zoo thiab cov neeg siv khoom txhua hnub.
Lub Sijhawm Post: Jul-17-2024