Hydroxypropyl Methylcellulose (HPMC)yog ib qho polymer uas yaj tau hauv dej uas feem ntau siv rau hauv kev lag luam tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev tsim kho. Cov dej noo ntawm HPMC ua lub luag haujlwm tseem ceeb hauv nws txoj kev ua thiab kev ruaj khov. Nws cuam tshuam rau cov khoom rheological, solubility, thiab lub neej txee ntawm cov khoom. Kev nkag siab txog cov dej noo yog qhov tseem ceeb rau nws cov qauv, kev khaws cia, thiab kev siv kawg.
Cov ntsiab lus ntawm HPMC
Feem ntau, cov dej noo ntawm AnxinCel®HPMC yog txiav txim siab los ntawm cov txheej txheem thiab qib tshwj xeeb ntawm cov polymer siv. Cov dej noo tuaj yeem sib txawv nyob ntawm cov khoom siv raw, cov xwm txheej khaws cia, thiab cov txheej txheem ziab. Nws feem ntau yog qhia ua feem pua ntawm qhov hnyav ntawm cov qauv ua ntej thiab tom qab ziab. Rau cov ntawv thov kev lag luam, cov dej noo yog qhov tseem ceeb, vim tias cov dej noo ntau dhau tuaj yeem ua rau puas tsuaj, sib sau ua ke, lossis txo qis kev ua haujlwm ntawm HPMC.
Cov dej noo ntawm HPMC tuaj yeem yog li ntawm 5% txog 12%, txawm hais tias qhov ntau thiab tsawg yog ntawm 7% thiab 10%. Cov dej noo tuaj yeem txiav txim siab los ntawm kev ziab cov qauv ntawm qhov kub tshwj xeeb (piv txwv li, 105 ° C) kom txog thaum nws mus txog qhov hnyav tas li. Qhov sib txawv ntawm qhov hnyav ua ntej thiab tom qab ziab sawv cev rau cov dej noo.
Cov Yam Cuam Tshuam Rau Cov Dej Nqus Hauv HPMC
Muaj ntau yam uas yuav cuam tshuam rau cov dej noo ntawm HPMC:
Cov av noo thiab cov xwm txheej cia khoom:
Cov av noo siab lossis cov xwm txheej khaws cia tsis raug tuaj yeem ua rau cov dej noo ntawm HPMC nce ntxiv.
HPMC yog hygroscopic, lub ntsiab lus nws nyiam nqus cov dej noo los ntawm huab cua ib puag ncig.
Kev ntim khoom thiab kev kaw cov khoom tuaj yeem txo qhov kev nqus dej noo.
Cov Cai Ua Haujlwm:
Qhov kub thiab lub sijhawm ziab thaum lub sijhawm tsim khoom tuaj yeem cuam tshuam rau cov dej noo kawg.
Qhov ziab sai yuav ua rau muaj cov dej noo seem, thaum qhov ziab qeeb yuav ua rau muaj cov dej noo ntau dua.
HPMC Qib:
Cov qib sib txawv ntawm HPMC (piv txwv li, viscosity qis, viscosity nruab nrab, lossis viscosity siab) yuav muaj cov ntsiab lus noo noo sib txawv me ntsis vim qhov sib txawv ntawm cov qauv molecular thiab kev ua tiav.
Cov Lus Qhia Txog Tus Neeg Muag Khoom:
Cov neeg muag khoom tuaj yeem muab HPMC nrog cov dej noo tshwj xeeb uas ua raws li cov qauv kev lag luam.
Cov ntsiab lus noo noo ib txwm muaj ntawm HPMC los ntawm Qib
Cov dej noo ntawm HPMC sib txawv nyob ntawm qib thiab kev siv. Nov yog lub rooj qhia cov qib dej noo rau ntau qib ntawm HPMC.
| HPMC Qib | Qhov viscosity (cP) | Cov ntsiab lus noo noo (%) | Cov ntawv thov |
| HPMC uas tsis muaj viscosity tsawg | 5 – 50 | 7 – 10 | Cov tshuaj (ntsiav tshuaj, tshuaj ntsiav), tshuaj pleev ib ce |
| Qhov Nruab Nrab Viscosity HPMC | 100 – 400 | 8 – 10 | Cov tshuaj (tswj kev tso tawm), khoom noj, cov nplaum |
| HPMC Viscosity Siab | 500 – 2000 | 8 – 12 | Kev tsim kho (ua los ntawm cement), khoom noj (tus neeg sawv cev ua kom tuab) |
| Tshuaj HPMC | 100 – 4000 | 7 – 9 | Cov ntsiav tshuaj, cov tshuaj ntsiav txheej, cov qauv gel |
| Khoom noj-Qib HPMC | 50 – 500 | 7 – 10 | Kev ua kom cov khoom noj tuab, emulsification, txheej txheej |
| Kev Tsim Kho Qib HPMC | 400 – 10000 | 8 – 12 | Cov tshuaj khib, cov nplaum, cov plasters, cov khoom sib xyaw qhuav |
Kev Ntsuas thiab Kev Txheeb Xyuas Cov Nroj Tsuag
Muaj ntau txoj kev txheem los txiav txim siab cov dej noo ntawm HPMC. Ob txoj kev siv ntau tshaj plaws yog:
Txoj Kev Ntsuas Qhov Hnyav (Kev Poob Thaum Qhuav, LOD):
Qhov no yog txoj kev siv dav tshaj plaws los txiav txim siab cov dej noo. Qhov hnyav paub ntawm HPMC raug muab tso rau hauv qhov cub ziab uas teeb tsa ntawm 105 ° C. Tom qab lub sijhawm teev tseg (feem ntau 2-4 teev), cov qauv raug hnyav dua. Qhov sib txawv ntawm qhov hnyav muab cov dej noo, uas yog qhia ua feem pua ntawm qhov hnyav piv txwv thawj zaug.
Karl Fischer Titration:
Txoj kev no muaj tseeb dua li LOD thiab muaj kev tshuaj lom neeg uas ntsuas cov dej hauv. Txoj kev no feem ntau yog siv thaum xav tau kev txiav txim siab kom meej.
Kev cuam tshuam ntawm cov ntsiab lus noo noo rau cov khoom HPMC
Cov dej noo ntawm AnxinCel®HPMC cuam tshuam rau nws cov kev ua tau zoo hauv ntau daim ntawv thov:
Qhov nplaum:Cov dej noo noo tuaj yeem cuam tshuam rau qhov viscosity ntawm HPMC cov kev daws teeb meem. Cov dej noo ntau dua tuaj yeem ua rau viscosity ntau ntxiv hauv qee cov qauv, thaum cov dej noo qis dua tuaj yeem ua rau viscosity qis dua.
Kev yaj tau:Cov dej noo ntau dhau tuaj yeem ua rau muaj kev sib sau ua ke lossis txo qis kev yaj ntawm HPMC hauv dej, ua rau nws tsis muaj txiaj ntsig zoo rau qee qhov kev siv, xws li cov qauv tso tawm tswj hwm hauv kev lag luam tshuaj.
Kev Ruaj Ntseg:HPMC feem ntau ruaj khov nyob rau hauv qhov chaw qhuav, tab sis cov dej noo ntau tuaj yeem ua rau cov kab mob loj hlob lossis kev puas tsuaj ntawm cov tshuaj lom neeg. Vim li no, HPMC feem ntau khaws cia rau hauv cov thawv kaw hauv qhov chaw noo noo tsawg.
Cov ntsiab lus noo noo thiab ntim khoom ntawm HPMC
Vim yog qhov xwm txheej hygroscopic ntawm HPMC, kev ntim khoom kom zoo yog qhov tseem ceeb kom tiv thaiv kev nqus dej noo los ntawm huab cua. HPMC feem ntau yog ntim rau hauv cov hnab tiv thaiv dej noo lossis cov thawv ua los ntawm cov ntaub ntawv xws li polyethylene lossis ntau txheej laminates los tiv thaiv nws ntawm dej noo. Lub ntim khoom ua kom ntseeg tau tias cov dej noo tseem nyob hauv qhov ntau yam xav tau thaum lub sijhawm khaws cia thiab thauj mus los.
Kev Tswj Xyuas Cov Nroj Tsuag Hauv Kev Tsim Khoom
Thaum lub sijhawm tsim khoom ntawm HPMC, nws yog ib qho tseem ceeb uas yuav tsum saib xyuas thiab tswj cov dej noo kom tswj tau cov khoom zoo. Qhov no tuaj yeem ua tiav los ntawm:
Cov Txheej Txheem Qhuav:HPMC tuaj yeem ziab tau siv cua kub, tshuab nqus tsev kom qhuav, lossis tshuab ziab rotary. Qhov kub thiab lub sijhawm ziab yuav tsum tau ua kom zoo tshaj plaws kom tsis txhob qhuav dhau (muaj dej noo ntau) thiab qhuav dhau (uas yuav ua rau puas tsuaj los ntawm cua sov).
Kev Tswj Xyuas Ib Puag Ncig:Kev tswj kom muaj ib puag ncig uas tswj tau qhov av noo tsawg hauv thaj chaw tsim khoom yog qhov tseem ceeb heev. Qhov no tuaj yeem suav nrog cov tshuab ziab dej, cua txias, thiab kev siv cov cuab yeej ntsuas av noo los saib xyuas cov huab cua thaum lub sijhawm ua khoom.
Cov dej noo ntawm HPMCfeem ntau poob rau hauv qhov ntau ntawm 7% txog 10%, txawm hais tias nws tuaj yeem sib txawv nyob ntawm qib, daim ntawv thov, thiab cov xwm txheej khaws cia. Cov dej noo yog ib qho tseem ceeb uas cuam tshuam rau cov khoom rheological, solubility, thiab kev ruaj khov ntawm AnxinCel®HPMC. Cov chaw tsim khoom thiab cov neeg tsim qauv yuav tsum tswj hwm thiab saib xyuas cov dej noo kom zoo kom ntseeg tau tias muaj kev ua tau zoo tshaj plaws hauv lawv cov ntawv thov tshwj xeeb.
Lub sijhawm tshaj tawm: Lub Ib Hlis-20-2025