Diluting Hydroxypropyl Methylcellulose (HPMC) suav nrog dispersing nws nyob rau hauv ib qho hnyav thaum tswj nws qhov xav tau concentration. HPMC yog cov khoom siv polymer muab los ntawm cov cellulose, feem ntau siv hauv cov tshuaj, tshuaj pleev ib ce, thiab cov ntaub ntawv tsim kho rau nws cov thickening, khi, thiab ua cov yeeb yaj kiab. Dilution tej zaum yuav tsim nyog rau ntau yam kev siv, xws li kho viscosity los yog ua kom tau raws li qhov xav tau.
1. Nkag siab txog HPMC:
Cov Khoom Siv Tshuaj: HPMC yog cov dej-soluble polymer nrog cov solubility sib txawv nyob ntawm nws qhov kev hloov pauv (DS) thiab qhov hnyav molecular (MW).
Viscosity: Nws viscosity nyob rau hauv cov kua yog nyob ntawm concentration, kub, pH, thiab muaj ntsev los yog lwm yam additives.
2. Kev xaiv cov kuab tshuaj:
Dej: HPMC feem ntau yog soluble hauv dej txias, ua kom pom tseeb lossis me ntsis turbid daws.
Lwm cov kuab tshuaj: HPMC kuj yuav yaj nyob rau hauv lwm cov polar solvents xws li cawv (xws li, ethanol), glycols (xws li, propylene glycol), los yog sib tov dej thiab organic solvents. Qhov kev xaiv nyob ntawm daim ntawv thov tshwj xeeb thiab cov khoom xav tau ntawm cov tshuaj.
3. Kev Txiav Txim Siab Xav Tau:
Kev txiav txim siab: Qhov xav tau concentration yog nyob ntawm qhov kev npaj siv, xws li thickening, film-forming, los yog raws li ib tug binding agent.
Initial Concentration: HPMC feem ntau muab rau hauv cov hmoov hmoov nrog cov qib viscosity. Thawj qhov concentration yog feem ntau qhia rau ntawm cov khoom ntim.
4. Cov kauj ruam npaj:
Kev Ntsuas: Ua kom raug ntsuas qhov xav tau ntawm HPMC hmoov siv qhov sib npaug.
Ntsuas Qhov Ntsuas: Ntsuas qhov tsim nyog ntawm cov kuab tshuaj (piv txwv li, dej) xav tau rau dilution. Xyuas kom cov kuab tshuaj yog huv si thiab zoo dua ntawm cov khoom tsim nyog rau koj daim ntawv thov.
Kev Xaiv Lub Thawv: Xaiv lub thawv huv uas tuaj yeem ua raws li qhov ntim ntawm cov tshuaj kawg uas tsis muaj dej ntau dhau.
Cov Khoom Siv Sib xyaw: Siv cov khoom sib xyaw kom haum rau qhov ntim thiab viscosity ntawm cov tshuaj. Sib nqus stirrers, overhead stirrers, los yog handheld mixers feem ntau yog siv.
5. Cov txheej txheem sib xyaw:
Cold Mixing: Rau cov dej-soluble HPMC, pib los ntawm kev ntxiv cov ntsuas ntsuas rau hauv lub thawv sib tov.
Ntxiv Ntxiv: Maj mam ntxiv cov hmoov ua ntej hnyav HPMC rau hauv cov kuab tshuaj thaum nplawm tsis tu ncua kom tiv thaiv clumping.
Kev ntxhov siab: Ua kom nplawm kom txog thaum HPMC cov hmoov tawg tag thiab tsis muaj pob nyob.
Lub Sijhawm Hniav: Tso cai rau cov tshuaj hydrate rau lub sijhawm txaus, feem ntau yog ob peb teev lossis ib hmos, kom ua tiav kev sib cais thiab cov viscosity zoo ib yam.
6. Kev Kho thiab Kev Ntsuas:
Kev Kho Kom Zoo Viscosity: Yog tias tsim nyog, kho qhov viscosity ntawm HPMC cov tshuaj los ntawm kev ntxiv cov hmoov ntxiv rau cov viscosity ntau dua los yog hnyav dua rau cov viscosity tsawg.
Kev kho pH: Nyob ntawm daim ntawv thov, kev hloov pH yuav tsim nyog siv cov kua qaub lossis alkaline additives. Txawm li cas los xij, HPMC cov kev daws teeb meem feem ntau ruaj khov tshaj pH ntau yam.
Kev Ntsuas: Ua qhov ntsuas viscosity siv viscometers lossis rheometers kom ntseeg tau tias cov tshuaj ua tau raws li qhov xav tau tshwj xeeb.
7. Cia thiab tuav:
Kev xaiv lub thawv: Hloov cov tshuaj HPMC diluted rau hauv cov thawv ntim khoom tsim nyog, zoo dua opaque los tiv thaiv lub teeb raug.
Labeling: Kom meej meej sau cov ntim nrog cov ntsiab lus, concentration, hnub npaj, thiab lwm yam ntaub ntawv ntsig txog.
Cia Lub Sijhawm: Khaws cov tshuaj rau hauv qhov chaw txias, qhuav kom deb ntawm tshav ntuj ncaj qha thiab qhov kub thiab txias los tiv thaiv kev degradation.
Lub neej txee: HPMC cov kev daws teeb meem feem ntau muaj kev ruaj ntseg zoo tab sis yuav tsum tau siv nyob rau hauv lub sijhawm tsim nyog kom tsis txhob muaj kab mob microbial los yog hloov pauv hauv viscosity.
8. Kev ceev faj txog kev nyab xeeb:
Cov Khoom Siv Tiv Thaiv Tus Kheej (PPE): Hnav PPE tsim nyog xws li hnab looj tes thiab tsom iav kev nyab xeeb thaum tuav HPMC hmoov thiab cov kev daws teeb meem los tiv thaiv daim tawv nqaij thiab qhov muag.
Qhov cua: Ua haujlwm hauv qhov chaw muaj cua zoo kom tsis txhob nqus cov plua plav los ntawm HPMC hmoov.
Cleanup: Ntxuav cov spills tam sim ntawd thiab pov tseg cov khib nyiab raws li cov cai hauv zos thiab cov chaw tsim khoom cov lus qhia.
9. Kev daws teeb meem:
Clumping: Yog tias clumps tsim thaum sib tov, ua kom muaj kev ntxhov siab thiab xav txog kev siv tus neeg sawv cev dispersing los yog kho cov txheej txheem sib tov.
Dissolution tsis txaus: Yog tias HPMC hmoov tsis tag nrho yaj, ua kom lub sij hawm sib xyaw lossis kub (yog tias tsim nyog) thiab xyuas kom cov hmoov ntxiv maj mam thaum nplawm.
Viscosity Variation: Inconsistent viscosity tuaj yeem tshwm sim los ntawm kev sib xyaw tsis raug, ntsuas tsis raug, lossis impurities hauv cov kuab tshuaj. Rov ua cov txheej txheem dilution ua tib zoo, kom ntseeg tau tias txhua qhov kev hloov pauv tau tswj hwm.
10. Kev txiav txim siab ntawm daim ntawv thov:
Compatibility Testing: Ua kev ntsuam xyuas kev sib raug zoo nrog lwm cov khoom xyaw lossis cov khoom siv ntxiv uas feem ntau siv hauv koj daim ntawv thov kom muaj kev ruaj ntseg thiab xav tau kev ua haujlwm.
Kev Ntsuam Xyuas Kev Ua Haujlwm: Ntsuas qhov ua tau zoo ntawm cov tshuaj HPMC diluted nyob rau hauv cov xwm txheej cuam tshuam kom paub meej tias nws tsim nyog rau kev siv.
Cov ntaub ntawv: Khaws cov ntaub ntawv ntxaws ntxaws ntawm cov txheej txheem dilution, suav nrog kev tsim, kev npaj cov kauj ruam, kuaj cov txiaj ntsig, thiab txhua yam kev hloov kho.
diluting HPMC yuav tsum tau ua tib zoo xav txog ntau yam xws li kev xaiv hnyav, kev txiav txim siab, kev sib xyaw, kev sim, thiab kev ceev faj txog kev nyab xeeb. Los ntawm kev ua raws li cov kauj ruam thiab cov txheej txheem tuav kom raug, koj tuaj yeem npaj cov kev daws teeb meem HPMC homogeneous raws li koj qhov kev thov tshwj xeeb.
Lub sij hawm xa tuaj: Mar-29-2024