Hydroxypropyl methylcellulose (HPMC)yog ib qho tseem ceeb ntawm cov cellulose ether nrog ntau yam kev siv, feem ntau hauv kev tsim kho, tshuaj, khoom noj, thiab lwm yam. Raws li kev ua haujlwm sib txawv, HPMC tuaj yeem muab faib ua hom tshuaj kho thiab tsis kho.
1. Qhov sib txawv ntawm cov txheej txheem ntau lawm
Tsis kho HPMC
Tsis kho HPMC tsis tau txais kev kho tshwj xeeb saum npoo txheej thaum lub sijhawm tsim khoom, yog li nws cov hydrophilicity thiab solubility ncaj qha khaws cia. Hom HPMC no swells sai heev thiab pib yaj tom qab kev sib cuag nrog dej, uas qhia ib tug ceev ceev viscosity.
Nto kho HPMC
Nto-kho HPMC yuav muaj txheej txheem txheej txheej ntxiv tom qab ntau lawm. Cov khoom siv kho mob saum npoo yog acetic acid lossis lwm cov tshuaj tshwj xeeb. Los ntawm txoj kev kho no, ib zaj duab xis hydrophobic yuav raug tsim nyob rau saum npoo ntawm HPMC hais. Qhov kev kho no ua rau nws cov txheej txheem tawg, thiab feem ntau nws yog qhov tsim nyog los qhib qhov kev sib cais los ntawm kev sib xyaw ua ke.
2. Qhov sib txawv ntawm cov khoom solubility
Dissolution yam ntxwv ntawm tsis kho HPMC
Tsis tau kho HPMC yuav pib yaj tam sim ntawd tom qab kev sib cuag nrog dej, uas yog tsim rau cov xwm txheej uas yuav tsum tau muaj siab rau kev tawg ceev. Txawm li cas los xij, txij li kev tawg sai sai yog tsim los ua cov agglomerates, qhov kev pub mis ceev thiab sib tov sib xyaw yuav tsum tau tswj xyuas kom zoo dua.
Dissolution yam ntxwv ntawm nto-kho HPMC
Cov txheej txheej ntawm qhov chaw kho HPMC cov khoom siv lub sijhawm ua kom yaj lossis ua kom puas, yog li lub sijhawm tawg yog ntev dua, feem ntau yog ob peb feeb mus rau ntau tshaj kaum feeb. Qhov kev tsim no zam kev tsim cov agglomerates thiab tshwj xeeb tshaj yog haum rau cov xwm txheej uas yuav tsum tau ua kom nrawm nrawm los yog cov dej tsis zoo thaum lub sijhawm sib ntxiv.
3. Qhov sib txawv ntawm cov yam ntxwv viscosity
HPMC qhov chaw kho mob yuav tsis tso tawm viscosity tam sim ntawd ua ntej kev sib cais, thaum tsis kho HPMC yuav ua rau kom lub viscosity ntawm lub system sai sai. Yog li ntawd, nyob rau hauv cov ntaub ntawv uas viscosity yuav tsum tau maj mam kho los yog cov txheej txheem yuav tsum tau tswj, lub nto-kho hom muaj ntau yam zoo.
4. Qhov sib txawv ntawm cov xwm txheej siv tau
Unsurface-kho HPMC
Haum rau cov xwm txheej uas yuav tsum tau tawg sai sai thiab muaj txiaj ntsig tam sim ntawd, xws li cov tshuaj ntsiav tshuaj tiv thaiv tam sim hauv thaj chaw tshuaj lossis cov thickeners ceev ceev hauv kev lag luam khoom noj.
Nws kuj ua tau zoo nyob rau hauv qee qhov kev tshawb fawb hauv chav kuaj lossis kev tsim khoom me me nrog kev tswj hwm nruj ntawm kev noj zaub mov.
Nto kho HPMC
Nws yog dav siv nyob rau hauv kev tsim kho kev lag luam, piv txwv li, nyob rau hauv qhuav mortar, pobzeb nplaum, coatings thiab lwm yam khoom. Nws yog ib qho yooj yim rau disperse thiab tsis tsim agglomerates, uas yog tshwj xeeb tshaj yog haum rau mechanized kev tsim kho.
Nws kuj tseem siv tau rau hauv qee qhov kev npaj tshuaj uas yuav tsum tau tso tawm los yog cov khoom noj khoom haus ntxiv uas tswj cov kev sib cais.
5. Tus nqi thiab kev cia khoom sib txawv
Tus nqi tsim khoom ntawm qhov chaw kho HPMC yog me ntsis siab dua qhov uas tsis kho, uas tau cuam tshuam qhov sib txawv ntawm cov nqi lag luam. Tsis tas li ntawd, hom kev kho saum npoo av muaj cov txheej txheem tiv thaiv thiab muaj kev xav tau qis dua rau cov av noo thiab qhov kub thiab txias ntawm qhov chaw khaws cia, thaum hom tsis kho yog hygroscopic ntau dua thiab yuav tsum muaj kev cia siab ntau dua.
6. Lub hauv paus xaiv
Thaum xaiv HPMC, cov neeg siv yuav tsum xav txog cov ntsiab lus hauv qab no raws li cov kev xav tau tshwj xeeb:
Puas yog qhov kev sib cais tseem ceeb?
Kev xav tau rau qhov kev loj hlob viscosity.
Seb txoj kev pub mis thiab sib tov yog yooj yim los tsim agglomerates.
Cov txheej txheem kev lag luam ntawm lub hom phiaj daim ntawv thov thiab qhov kawg kev ua tau zoo ntawm cov khoom.
Deg-kho thiab tsis-nto-khoHPMCmuaj lawv tus yam ntxwv. Cov qub txhim kho qhov yooj yim ntawm kev siv thiab kev ua haujlwm ruaj khov los ntawm kev hloov pauv tus cwj pwm kev sib cais, thiab tsim nyog rau kev lag luam loj loj; lub tom kawg khaws ib tug siab dissolution tus nqi thiab yog ntau haum rau cov zoo tshuaj kev lag luam uas yuav tsum tau ib tug siab dissolution tus nqi. Qhov kev xaiv ntawm hom twg yuav tsum tau ua ke nrog rau qhov tshwj xeeb daim ntawv thov scenario, txheej txheem cov txheej txheem thiab cov nqi siv nyiaj.
Post lub sij hawm: Nov-20-2024