(1) Taw qhia rau HPMC
HydroxyPropyyl methylulose (HPMC) yog ib qho tseem ceeb ntawm cellulose tseem ceeb siv hauv cov tshuaj ntxuav, cov ntaub ntawv tsim tsev, khoom noj thiab lwm daim teb. Hauv cov tshuaj ntxhua khaub ncaws, HPMC yog siv los ua cov tuab hpren kom muab cov khoom sib luag thiab ua kom zoo nkauj thiab ntxhua khaub ncaws ntxhua khaub ncaws. Txawm li cas los xij, kom ua tiav qhov kev pom zoo ntawm HPMC nyob rau hauv cov tshuaj ntxhua khaub ncaws, ntau yam yuav tsum tau txiav txim siab, suav nrog hom, muab cov xwm txheej, sib ntxiv, thiab lwm yam ntawm HPMC.
(2) yam cuam tshuam rau HPMC viscosity
1. Hom thiab Qauv HPMC
Qhov hnyav molecular thiab qib degree hloov chaw (metoxy thiab hydroxyProps hloov nws viscosity thiab solubility cov khoom. Hom HPMC muaj ntau hom viscosity li. Xaiv lub qauv HPMC uas haum koj cov khaub ncaws ntxhua khaub ncaws ua kom nruj ua tiav cov kev xav tau yog qhov tseem ceeb. Feem ntau hais lus, siab dua molecular hnyav HPMCs muab cov viscosities ntau dua, thaum txo cov roj qis HPMCs muab cov viscosities qis.
2. Qosage ntawm HPMC
Tus nqi HPMC muaj qhov cuam tshuam tseem ceeb ntawm viscosity. Feem ntau, HPMC ntxiv rau hauv cov nyiaj ntawm 0.5% thiab 2% hauv cov tshuaj tua ntxhua khaub ncaws. Cov tshuaj uas muaj tsawg dhau yuav tsis ua tiav cov nyhuv thickening, thaum lub sijhawm muaj kev nyuaj ib yam li kev sib tov thiab sib xyaw tsis ncaj. Yog li ntawd, cov tshuaj HPMC yuav tsum tau hloov kho raws li cov kev xav tau thiab kev sim ua kom tiav cov viscosity oposity.
3. Kev mob siab
Kev sib cais ntawm cov kev tshwm sim ntawm HPMC (ntsuas kub, txhawm rau nrawm, thiab lwm yam) muaj qhov cuam tshuam tseem ceeb rau nws viscosity:
Qhov kub thiab txias: HPMC tau qeeb qeeb ntawm qhov kub qis dua tab sis tuaj yeem muab cov viscosities ntau dua. Dissolves sai ntawm cov kub kub tab sis muaj qis viscosity. Nws raug nquahu kom yaj HPMC ntawm 20-40 ° C kom ntseeg tau tias nws ruaj khov thiab viscosity.
PH: HPMC ua tau zoo tshaj plaws nyob rau hauv nruab nrab kev mob nruab nrab. Huab PH qhov tseem ceeb (dhau lawm acidic lossis dhau alkaline) tuaj yeem rhuav tshem cov qauv ntawm HPMC thiab txo nws cov viscosity. Yog li ntawd, tswj hwm tus nqi ntawm cov ntxhua khaub ncaws xab tshuaj ntxhua nruab nrab ntawm 6-8 pab tswj kom muaj kev ruaj ntseg thiab viscosity ntawm HPMC.
Stirring ceev: tsim nyog stirringing ceev tuaj yeem txhawb kev sib cais ntawm HPMC, tab sis ntau dhau los ua npuas thiab cuam tshuam kev sib xyaw ntawm kev daws teeb meem. Nws feem ntau pom zoo kom siv qeeb thiab txawm nplawm nrawm mus rau tag nrho HPMC.
4. Ntxiv kev txiav txim
HPMC yooj yim ua agglomerates hauv kev daws, cuam tshuam nws cov kev sib cais thiab viscosity kev ua tau zoo. Yog li ntawd, qhov kev txiav txim uas HPMC ntxiv yog qhov tseem ceeb:
Kev sib xyaw ua ntej: Sib tov HPMC nrog lwm cov hmoov av qhuav thiab tom qab ntawd ntxiv rau cov kev tsim ntawm pawg thiab pab kom yaj tusy.
Moisturizing: Ua ntej ntxiv HPMC rau cov tshuaj ntxuav ntxhua khaub ncaws, koj tuaj yeem ua ntej noo me me, thiab tom qab ntawd ntxiv dej kub kom yaj nws. Qhov no tuaj yeem txhim kho kev sib cais ua haujlwm thiab viscosity ntawm HPMC.
(3) Cov kauj ruam los ua kom zoo HPMC viscos
1. Cov qauv tsim qauv
Xaiv cov qauv HPM tsim tsim nyog thiab cov koob tshuaj HPMC tsim nyog thiab kev siv tau raws li qhov kawg siv thiab cov kev xav tau ntawm cov ntxhua khaub ncaws xab npum. High-efficievic tu ntxhua khaub ncaws tshuaj yuav xav tau siab viscosity HPMC, thaum dav dav tu cov khoom yuav xaiv qhov nruab nrab rau qhov nruab nrab hauv Viscosity HPMC.
2. Kev sim kuaj
Ua cov kev ntsuam xyuas me me-batch hauv chav kuaj mob los soj ntsuam nws qhov kev cuam tshuam rau kev hloov chaw ntxhua khaub ncaws ntawm cov tshuaj tua kab mob, kev txiav txim siab, thiab lwm yam ntawm HPMC. Sau cov ntsuas thiab cov txiaj ntsig ntawm txhua qhov kev sim los txiav txim siab ua kev sib xyaw zoo tshaj plaws.
3. Cov txheej txheem hloov kho
Thov siv cov ntawv qhia ua haujlwm thiab cov txheej txheem zoo tshaj plaws rau cov kab ntau lawm thiab kho lawv rau cov khoom loj. Ua kom ntseeg tau tias cov kev faib tawm ntawm HPMC thaum lub sijhawm ua haujlwm ntau dua kom tsis txhob muaj teeb meem xws li pob txha caj dab thiab kev sib cais tsis zoo.
4. Tswjhwm Zoo
Los ntawm cov qauv kev sim ua haujlwm zoo, xws li viscieter ntsuas, ntsuas khaub ncaws huv si, thiab lwm yam. Nws tau siv cov viscosity thiab siv cov nyhuv. Ua cov kev tshuaj xyuas zoo ib txwm thiab kho cov txheej txheem sai thiab cov qauv yog teeb meem pom.
(4) Cov Lus Nquag Nug thiab cov kev daws teeb meem
1. Cov neeg tsis zoo ntawm HPMC
Vim li cas: Tsis Txaus Siab Tshaj Tawm Kub, nrawm dhau los yog qeeb dhau stirring nrawm, ntxiv ntxiv kev txiav txim, thiab lwm yam.
Kev daws: kho cov kev sib cais ntawm qhov kub txog 20-40 ° C, siv qeeb thiab tseem nplawm, thiab ua kom zoo dua ib qho ntxiv.
2. HPMC viscosity tsis yog txog ntawm tus qauv
Vim li cas: Tus qauv HPMC yog qhov tsis tsim nyog, cov tshuaj tsis muaj txiaj ntsig, tus nqi pH siab dhau lossis qis dua, thiab lwm yam.
Kev daws: Xaiv cov qauv HPMC tsim nyog thiab kev ntsuas tshuaj, thiab tswj cov nqi ntxhua khaub ncaws ntxhua khaub ncaws nruab nrab ntawm 6-8.
3. HPMC clump tsim
Yog vim li cas: HPMC tau ntxiv mus rau hauv kev daws, tsis raug cai xaus kev mob, thiab lwm yam.
Kev daws: Siv kev sib xyaw ua ntej, ua ntej sib xyaw HPMC nrog lwm cov hmoov qhuav, thiab maj ntxiv nws mus rau dej kom yaj.
Yuav kom ua tiav qhov outtimal viscosity ntawm HPMC nyob rau hauv cov tshuaj ntxuav ntxhua khaub ncaws, yam xws li hom, muab tshuaj rau HPMC yuav tsum tau nkag siab txog kev nkag siab. Los ntawm kev tsim txuj ci ntawm scientific, kev sim tshuaj xyuas thiab cov txheej txheem kev hloov kho, yog qhov ua tau zoo ntawm HPMC tuaj yeem txhim kho cov nyhuv siv thiab kev sib tw ua lag luam ntawm cov tshuaj ntxhua khaub ncaws.
Lub Sijhawm Post: Jul-08-2024