Sib tov hydroxypropyl methylcellose (HPMC) nrog cov dej tsis muaj zog hauv ntau qhov kev lag luam, suav nrog cov tshuaj, kev tsim kho, thiab tshuaj pleev noj, thiab tshuaj pleev ib ce, thiab cov tshuaj pleev ib ce, thiab cov tshuaj pleev ib ce, thiab cov tshuaj pleev ib ce, thiab cov tshuaj pleev ib ce, thiab cov tshuaj pleev ib ce, thiab tshuaj pleev noj, thiab tshuaj pleev ib ce, thiab tshuaj pleev noj, thiab tshuaj pleev ib ce, thiab tshuaj pleev noj, thiab tshuaj pleev ib ce, thiab tshuaj pleev noj, thiab tshuaj pleev ib ce, thiab cov tshuaj pleev ib ce, thiab tshuaj pleev noj, thiab tshuaj pleev ib yam. HPMC yog lub cellulose-raws polymer uas feem ntau siv los ua tus neeg sawv cev tuab, binder, zaj duab xis yav tas los, thiab stabilizer. Nws cov khoom tshwj xeeb ua rau nws soluble hauv dej thiab muab cov duab ua zoo nkauj-tsim, viscosity tswj, thiab adhesion txhim kho. To taub txoj kev tsim nyog HPMC nrog dej yog qhov tseem ceeb kom ua tiav cov khoom lag luam xav tau thiab sib txawv.
Nkag siab HPMC:
Ua ntej delving rau hauv cov txheej txheem sib xyaw, nws yog qhov tseem ceeb kom nkag siab txog cov khoom thiab cov yam ntxwv ntawm HPMC. HPMC yog muab tau los ntawm cellulose thiab feem ntau tsis muaj ntxhiab, tsis muaj qab hau, thiab tsis muaj tshuaj lom. Nws muaj nyob rau hauv ntau qib nrog cov viscosity sib txawv, qhov ntau thiab tsawg thiab tsawg dua ntawm kev hloov chaw. Cov khoom no cuam tshuam nws qhov kev ua tau zoo hauv cov ntawv thov sib txawv, xws li:
Kws Tshuaj Kho Mob: HPMC tau siv dav hauv cov tshuaj uas muaj cov ntsiav tshuaj, tshuaj noj tshuaj noj qab zib, thiab cov yeeb yaj kiab zoo tshaj plaws thiab sib xyaw nrog cov khoom xyaw nquag.
Kev tsim kho: Hauv kev tsim kho kev tsim kho, HPMC pabcuam ua cov ntaub ntawv tuab thiab lim, txhim kho cov khoom sib xyaw, txhim kho cov khoom ua haujlwm, thiab cov nplaum, thiab kav ntev.
Khoom noj khoom haus thiab cov tshuaj pleev ib ce: HPMC tau siv nyob rau hauv cov khoom noj khoom haus raws li cov tuab, stabilizes, thiab emulsifier, pab txhawb kev ntxhib los mos thiab txee-lub neej txuas ntxiv. Hauv cov tshuaj pleev ib ce, nws ua haujlwm zoo li zaj yeeb yaj kiab qub, binder, thiab viscosity concifiv hauv cream, tshuaj, thiab tshuaj zawv plaub hau.
Sib tov HPMC nrog dej:
Cov txheej txheem ntawm kev sib xyaw HPMC nrog dej cuam tshuam ntau kauj ruam los xyuas kom meej dispersion thiab hydration ntawm cov polymer. Ntawm no yog cov qhia ntxaws ntxaws ntawm yuav ua li cas sib tov HPMC nrog dej zoo:
1. Khoom siv thiab khoom siv:
Huv si, tsis-reactive mixing lub nkoj (stainless hlau lossis yas)
Stirring khoom siv (tshuab siv tshuab stirrer lossis cov khoom siv tes)
Kawm tiav lub thawv lossis teev
Distilled lossis deionized dej (pom zoo kom zoo sib xws)
Kev Nyab Xeeb Cov iav (hnab looj tes, hnab looj tes, thiab daim npog ntsej muag, yog tsim nyog)
2. Npaj dej:
Ntsuas qhov yuav tsum tau ntawm cov dej yog qhov tseeb uas yog siv lub thawv ntsuas tiav lossis ntsuas. Cov dej-rau-HPMC piv yog nyob ntawm cov ntawv thov tshwj xeeb thiab xav tau viscosity.
Siv cov dej distilled lossis deistized los tiv thaiv kev tawm tsam lossis cov khoom paug uas yuav cuam tshuam rau kev ua haujlwm ntawm kev daws teeb meem.
Yog tias cov dej sov tau pom zoo, ua kom sov dej mus rau qhov ntsuas kub. Zam txhob siv dej kub kom tiv thaiv kev ua kom ntxov lossis clumping ntawm HPMC hais.
3. Ntxiv HPMC:
Maj mam nchuav cov nyiaj yuav tsum tau ntawm HPMC rau hauv dej thaum txuas ntxiv txhawm rau tiv thaiv kom tsis txhob muaj clumping thiab xyuas kom meej.
Zam kev ntxiv HPMC sai sai, raws li nws yuav ua rau tsim cov lumps lossis agglomerates uas nyuaj rau kev txawv txav tsis zoo.
4. Nws:
Txuas ntxiv nplawm qhov sib xyaw kom haum rau ntawm kev nrawm nrawm txog thaum lub HPMC hais yog tag nrho cov dispersed thiab hydrated.
Lub sijhawm sib xyaw yuav sib txawv nyob ntawm HPMC qib, qhov loj me me, thiab xav tau viscosity. Feem ntau, kev sib xyaw ua tiav yog ua tiav tsis pub dhau 10 mus rau 20 feeb.
Xyuas kom meej tias kev tov khoom ua nrawm thiab kev ntxhov siab yog txaus los tiv thaiv kev tawm tsam HPMC hais hauv qab ntawm lub nkoj.
5. Hydration:
Cia cov dej HPMC-sib tov rau hydrate rau lub sijhawm pom zoo, feem ntau 248 teev, nyob ntawm daim ntawv thov.
Thaum nruab dej, HPMC cov lus nqus dej thiab o, tsim cov tshuaj uas khov lossis gel nrog cov khoom siv hluav taws xob xav tau.
Npog lub nkoj sib xyaw nrog lub hau lossis qhwv yas qhwv kom tiv thaiv kom tsis txhob evaporation thiab paug rau thaum muaj dej.
6. Tswjhwm Zoo:
Qee lub sijhawm kuaj xyuas lub viscosity, pH, thiab lwm yam cuam tshuam ntawm HPMC tov rau thaum thiab tom qab co dej kom muaj xwm yeem thiab zoo.
Kho lub viscosity los yog kev xav raws li xav tau los ntawm kev ntxiv dej ntau lossis HPMC kom ua tiav cov yam ntxwv xav tau.
Cov kev txiav txim siab tseem ceeb thiab kev coj ua zoo tshaj plaws:
Txhawm rau kom muaj kev sib xyaw ua tiav HPMC nrog kev ua tau dej thiab kev ua tau zoo nyob rau hauv ntau yam kev siv, xav txog cov kev coj ua hauv qab no thiab kev coj ua zoo tshaj plaws:
Qhov kub thiab txias: Ua raws li cov kev pom zoo kom haum rau kev sib xyaw thiab hpmc los pab txhawb kom muaj kev sib txawv ntawm cov polymer.
Agitation: Siv cov khoom siv tsim nyog thiab kev kub ntxhov los tiv thaiv clumping thiab paub tseeb cov kev sib cais ntawm HPMC hais thoob plaws kev daws.
Qhov loj me me: Xaiv cov qhab nia HPMC nrog cov ntawv thov haum rau cov kev siv viscosity, kev ntxhib los mos, thiab zaj duab xis-ua cov khoom.
Hydration lub sij hawm: Cia lub sijhawm txaus rau HPMC hais kom txhua lub zog hydrate thiab ua ib qho kev daws teeb meem lossis gel nrog cov khoom siv hluav taws xob zoo ib yam.
Cov dej zoo: Siv cov dej muaj txiaj ntsig zoo, xws li cov dej tsis muaj zog lossis cov dej tsis txaus ntseeg, kom txo qis kev coj tsis zoo thiab muaj kev ruaj ntseg ntawm HPMC daws.
Kev sib raug zoo: Xav txog kev sib xyaw ntawm HPMC nrog rau lwm cov khoom xyaw lossis ntxiv rau hauv kev tsim kom tsis txhob cuam tshuam cov khoom lag luam.
Cia thiab tuav: Khw HPMC nyob rau hauv qhov chaw txias, qhuav kom deb ntawm kev tshav ntuj ncaj qha thiab noo kom tiv thaiv kev ua tsis taus lossis txhaws. Kov HPMC nrog kev saib xyuas kom tsis txhob muaj plua plav pa thiab tawv nqaij.
Kev ceev faj kev nyab xeeb: Hnav hnab looj tes tsim nyog tsim nyog tsim nyog, goggles, thiab tuav HPMC hmoov kom txo cov hmoov av.
Sib tov hydroxypropyl methylcellose (HPMC) nrog cov dej yog ib qib tseem ceeb hauv ntau yam lag luam, suav, khoom noj, thiab tshuaj pleev noj, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce. Los ntawm kev ua kom cov txheej txheem sib xyaw kom zoo thiab cov kev coj ua tau zoo tshaj plaws hauv phau ntawv qhia no, koj tuaj yeem ua kom cov kev ua kom zoo, dej, thiab kev ua haujlwm ntawm HPMC hauv cov ntawv thov sib txawv. Nco ntsoov xav txog qhov tseem ceeb thiab ntsuas kub, kev ntxhov siab, dej zoo, tuav, thiab kev nyab xeeb ceev faj kom ua tiav cov txiaj ntsig zoo. Nrog ceev faj kom nthuav dav thiab kev ua raws li cov lus qhia pom zoo, koj tuaj yeem siv lub peev xwm ntawm HPMC ua ntau yam hluav taws xob nrog ntau cov khoom muaj nuj nqi.
Lub Sijhawm Post: Feb-18-2025