Hydroxypropyl methylcellulose (HPMC) thiab hypromellose yeej yog tib yam tshuaj, thiab cov lus no feem ntau siv sib pauv. Cov no yog cov npe nyuaj rau cov hom polymers cellulose uas muaj ntau yam kev siv hauv ntau yam lag luam suav nrog tshuaj, khoom noj thiab tshuaj pleev ib ce.
1. Cov qauv tshuaj lom neeg thiab cov khoom sib xyaw:
Hydroxypropylmethylcellulose (HPMC) yog kev hloov kho hluavtaws ntawm cellulose, ib qho polymer ntuj pom muaj nyob rau hauv cov phab ntsa cell ntawm cov nroj tsuag. Cov qauv tshuaj ntawm HPMC tau txais los ntawm kev qhia txog hydroxypropyl thiab methyl pawg raws li cellulose. Hydroxypropyl pawg ua rau cellulose yaj ntau dua hauv dej, thiab methyl pawg txhim kho nws qhov ruaj khov thiab txo nws cov tshuaj tiv thaiv.
2. Cov txheej txheem tsim khoom:
Kev tsim cov hydroxypropyl methylcellulose suav nrog kev kho cov cellulose nrog propylene oxide los qhia cov pab pawg hydroxypropyl thiab tom qab ntawd nrog methyl chloride los ntxiv cov pab pawg methyl. Qib ntawm kev hloov pauv (DS) ntawm hydroxypropyl thiab methyl tuaj yeem hloov kho thaum lub sijhawm tsim khoom, ua rau muaj ntau qib ntawm HPMC nrog cov khoom sib txawv.
3. Cov khoom siv lub cev:
HPMC yog hmoov dawb mus rau me ntsis dawb tawm, tsis muaj ntxhiab thiab tsis qab. Nws cov khoom siv lub cev, xws li viscosity thiab solubility, nyob ntawm qib ntawm kev hloov pauv thiab qhov hnyav molecular ntawm cov polymer. Hauv qhov xwm txheej ib txwm muaj, nws yooj yim yaj hauv dej, tsim cov tshuaj pob tshab thiab tsis muaj xim.
4. Lub hom phiaj kho mob:
Ib qho ntawm cov ntawv thov tseem ceeb ntawm HPMC yog nyob rau hauv kev lag luam tshuaj. Nws yog siv dav ua cov tshuaj ntxiv thiab ua ntau yam haujlwm hauv kev npaj tshuaj. HPMC feem ntau pom muaj nyob rau hauv cov ntawv kho mob khov kho xws li cov ntsiav tshuaj, tshuaj ntsiav, thiab tshuaj ntsiav. Nws ua haujlwm ua tus khi, disintegrant, thiab tus neeg sawv cev tso tawm tswj, pab txhawb rau kev ruaj khov thiab bioavailability ntawm cov tshuaj.
5. Lub luag haujlwm hauv kev npaj tso tawm tshuaj uas raug tswj:
Lub peev xwm ntawm HPMC los tsim cov gels hauv cov kua dej ua rau nws muaj txiaj ntsig zoo hauv cov tshuaj tswj kev tso tawm. Los ntawm kev hloov pauv qhov viscosity thiab cov khoom tsim gel, cov kws tshawb fawb txog tshuaj tuaj yeem tswj qhov kev tso tawm ntawm cov khoom xyaw nquag, yog li ua tiav cov tshuaj ua haujlwm ntev thiab ntev.
6. Daim ntawv thov hauv kev lag luam zaub mov:
Hauv kev lag luam khoom noj, HPMC siv ua cov khoom ua kom tuab, stabilizer thiab emulsifier. Nws txhim kho cov qauv ntawm ntau yam khoom noj, suav nrog cov kua ntses, kua zaub thiab cov khoom noj mis nyuj. Tsis tas li ntawd, HPMC siv rau hauv kev ci tsis muaj gluten los txhim kho cov qauv thiab cov khoom noo noo ntawm cov khoom tsis muaj gluten.
7. Kev tsim kho thiab cov ntaub ntawv siv hauv tsev:
HPMC siv rau hauv kev lag luam kev tsim kho hauv cov khoom xws li cov nplaum pobzeb, cov cement-based plasters thiab cov ntaub ntawv gypsum. Nws txhim kho qhov ua tau zoo, kev khaws dej thiab cov khoom nplaum ntawm cov khoom no.
8. Cov tshuaj pleev ib ce thiab cov khoom siv tu tus kheej:
Hypromellose kuj yog ib qho khoom xyaw uas siv ntau hauv cov tshuaj pleev ib ce thiab cov khoom siv tu cev. Nws siv rau hauv cov tshuaj pleev, tshuaj pleev, thiab tshuaj zawv plaub hau vim nws cov khoom ua kom tuab thiab ruaj khov. Tsis tas li ntawd, nws pab txhim kho qhov zoo nkauj thiab kev xav ntawm cov khoom.
9. Zaj duab xis txheej hauv tshuaj:
HPMC siv dav hauv kev lag luam tshuaj rau kev txheej zaj duab xis ntawm cov ntsiav tshuaj. Cov ntsiav tshuaj txheej zaj duab xis muab kev zoo nkauj dua, kev zais saj thiab kev tiv thaiv los ntawm cov yam ntxwv ib puag ncig. Cov zaj duab xis HPMC muab kev txheej du thiab sib xws, txhim kho qhov zoo ntawm cov tshuaj.
13. Xaus Lus:
Hydroxypropyl methylcellulose (HPMC) thiab hypromellose yog hais txog tib yam cellulose-based polymer uas muaj ntau yam kev siv hauv kev lag luam tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev tsim kho. Nws cov khoom tshwj xeeb, xws li solubility, stability thiab biodegradability, pab txhawb rau nws siv dav. Qhov versatility ntawm HPMC hauv ntau yam lag luam qhia txog nws qhov tseem ceeb ua cov khoom siv ntau yam, thiab txuas ntxiv rov ua dua.kev tshawb nrhiav thiab kev txhim kho yuav tshawb pom lwm cov ntawv thov yav tom ntej.
Daim ntawv qhia txog kev piav qhia no lub hom phiaj yog los muab kev nkag siab txog hydroxypropyl methylcellulose thiab hypromellose, piav qhia txog lawv qhov tseem ceeb hauv ntau qhov chaw, thiab piav qhia txog lawv lub luag haujlwm hauv kev tsim ntau yam khoom thiab cov qauv.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-21-2023