1. Cov ntsiab lus
HydroxyPropyyl Metylcellulose (HPMC) yog qhov kev ua tau zoo ntawm cov khoom siv hauv tsev, tshwj xeeb yog cov khoom sib xyaw ntawm cov cement-raws li. Cov haujlwm tseem ceeb ntawm HPMC hauv Caas colle xws li cov tuab tuab, ua kom zoo dua qub thiab txhim kho cov haujlwm ua haujlwm. To kev nkag siab txog HPMC hauv Cort Cug yog qhov tseem ceeb rau kev ua kom zoo dua qub nws cov kev ua tau zoo.
2. Cov khoom yooj yim ntawm HPMC
HPMC yog ib qho tsis-ionic cellulose ither, uas cov txheej txheem txheej txheem uas yog muaj ntawm cellulose, hydroxyprropyl thiab methyl. Cov qauv tshuaj ntawm HPMC muab nws cov khoom siv rau lub cev thiab tshuaj lom neeg hauv cov tshuaj aqueous:
Thickening cov nyhuv: HPMC tuaj yeem tsim cov tshuaj tua kab hauv dej, uas yog vim yog qhov tseeb tias tom qab nws tau yaj nyob rau hauv ib leeg los ua ib tug qauv network.
Dej Retention: HPMC muaj lub peev xwm ua kom muaj zog ua kom muaj zog thiab tuaj yeem ncua cov dej evaporation, yog li ua lub luag haujlwm hauv cov dej cug hauv xis.
Adhesion kev ua tau zoo: vim HPMC lwg me me ua ib zaj yeeb yaj kiab tiv thaiv nruab nrab ntawm CAs hais, kev ua tau zoo ntawm kev ua tau zoo dua.
3. Kev sib cais ntawm HPMC hauv Ceg Cug
Cov txheej txheem tshem tawm: HPMC yuav tsum tau yaj hauv dej ua ntej. Txheej txheem sib cais yog tias HPMC hmoov nqus dej thiab swells, thiab maj me disperses los ua ib qho kev daws teeb meem. Txij li thaum lub solubility ntawm HPMC nyob rau hauv cov dej muaj feem xyuam rau nws cov qib ntawm qhov hloov (DS) thiab molecular hnyav, nws yog qhov tseem ceeb los xaiv HPMC cov lus tshwj xeeb. Kev sib cais ntawm HPMC hauv dej yog txheej txheem diffusion, uas yuav tsum tau nplawm kom ua kom muaj kev tawg ua kom nrawm dua dispersion.
Kev sib cais tsis zoo: Lub sijhawm HPMC, yog tias lub plhaw ntawm HPMC, yog tias lub plhaw tsis muaj peev xwm lossis muaj kev sib cais los ua cov agglomerates (ntses muag). Cov agogromerates yog qhov nyuaj rau yaj ntxiv ntxiv, yog li cuam tshuam kev ua haujlwm ntawm xis mas cortion. Yog li ntawd, tsis muaj zog nplawm thaum lub sijhawm sib cais yog qhov txuas tseem ceeb kom ntseeg tau tias muaj kev sib cais ntawm HPMC.
Kev sib cuam tshuam nrog cov pajasqules: cov polymer cov saw tsim tom qab HPMC yog yaj yuav maj mam muab cov khoom noj kom haum rau ua yeeb yaj kiab tiv thaiv. Cov yeeb yaj kiab tiv thaiv no tuaj yeem nce cov nplaum ntawm ib sab, thiab ntawm qhov thaiv ntawm cov tog kom qeeb qeeb thiab evaporation ntawm dej.
Kev rho tawm lub pob tsuas: Cov Polymer saw ntawm HPMC tuaj yeem tsim lub cev nrog CA2 +, Sio2 thiab lwm yam ions ntawm sab xis ntawm cov kev sib cais lub xeev. Los ntawm kev kho cov degree ntawm kev hloov pauv hloov pauv thiab hnyav hnyav ntawm HPMC, nws qhov kev tshem tawm ruaj khov hauv cov xis ua tau zoo.
4. Kev ua kom zoo ntawm HPMC hauv cort cug
Thickening cov nyhuv:
Lub thickening nyhuv ntawm hpmc nyob rau hauv kev txaws ntawm nws cov kev xav thiab hnyav hnyav. HPMC nrog lub cev hnyav dua tuaj yeem ua kom lub vortcosity ntawm lub vortcosity ntawm lub cev cug, thaum HPMC nrog cov nyhuv tsawg dua ntawm cov kev ua kom zoo dua.
Cov nyhuv tuab tuaj yeem txhim kho kev ua haujlwm ntawm cug tshuaj tua kab tshuaj khib thiab ua lub tshuaj khib tau ua haujlwm zoo dua, tshwj xeeb hauv kev tsim kho.
Dej khaws cia:
HPMC tuaj yeem ntes tau ya raws thiab txuas lub sijhawm qhib ntawm lub tshuaj khib. Dej khaws cia tsis tuaj yeem tsuas yog txo cov teeb meem shrinkage thiab tawg teeb meem hauv kev tshuaj khib, tab sis kuj tseem txhim kho txoj kev tshuaj khib ntawm lub substrate.
Lub peev xwm kav dej khaws cia ntawm HPMC yog ze ze rau nws solubility. Los ntawm xaiv HPMC nrog cov theem tsim nyog ntawm kev hloov pauv, cov dej khaws cov nyhuv khaws cia ntawm lub tshuaj khib tau ua tau zoo.
Txhim kho cov khoom sib khi ua ke:
Txij li thaum HPMC tuaj yeem tsim tus choj nplaum ntawm Caas hais tawm, tshwj xeeb tshaj yog siv rau hauv thermal returing cug thiab pobzeb cov khoom nplaum.
HPMC kuj tseem tuaj yeem txhim kho kev tsim kho kev tsim kho los ntawm kev txo cov dej evaporation sai sai thiab muab sijhawm ua haujlwm ntev dua.
Kev Siv Ua Haujlwm:
Daim ntawv thov ntawm HPMC hauv kev txig tuaj yeem hloov kho nws txoj kev tsim kho kev tsim kho. HPMC ua lub tshuaj khib muaj cov roj cug zoo dua thiab viscosity, uas yog ib qho yooj yim los thov thiab txua cov haujlwm tshwj xeeb los xyuas kom meej.
Los kho cov nyiaj thiab kev teeb tsa ntawm HPMC, cov khoom siv hluav taws xob ntawm kev tshuaj khib tau ua kom zoo rau kev hloov kho kom haum.
5. Cov ntaub ntawv ua piv txwv ntawm HPMC hauv Ceg Cug
Pobzeb Adhesive:
HPMC feem ntau yog lub luag haujlwm ntawm dej khaws cia thiab ua kom tuab rau hauv cov nplais nplaum. Los ntawm kev txhim kho cov dej tuav ntawm cov nplaum, HPMC tuaj yeem txuas ntxiv nws lub sijhawm qhib, muab lub sijhawm hloov tau txaus, thiab tiv thaiv cov vuas los ntawm kev tsim kho tom qab kev tsim kho.
Cov nyhuv tuab kom ntseeg tau tias cov nplaum tsis sag
Sab Nraud phab ntsa Rwb Thaiv Tsev Nplaum Tshuaj Khib:
Hauv phab ntsa sab nraud rwb thaiv tsev sib xyaw, cov haujlwm tseem ceeb ntawm HPMC yog txhawm rau txhim kho cov dej khaws cia thiab tawg tawm ntawm cug. Los ntawm kev ntes cov dej noo, HPMC tuaj yeem txo cov shrinkage thiab tawg ntawm cug cug lub sijhawm ua kom qhuav.
Txij li thaum cov tshuaj khib nyiab muaj qhov siab ua rau kev sib hloov ntawm HPMC tuaj yeem txhim kho cov txheej txheem ntawm phab ntsa txheej ntawm cov txheej txheem rwb thaiv tsev.
Tus kheej-leveling cug:
HPMC nyob rau hauv tus kheej-banking cug yuav ua kom paub meej tias tsis muaj stratification lossis dej seem los ntawm kev tshuaj khib nyiab los ntawm cov txheej txheem theem, yog li ua kom muaj zog ntawm lub tiaj tus kheej.
6. Kev tsim kho yav tom ntej yav tom ntej ntawm HPMC
Kev tiv thaiv ntsuab thiab ib puag ncig:
Nrog kev txhim kho ntawm kev tiv thaiv ib puag ncig, kev txhim kho cov khoom lag luam HPMC tsis muaj txiaj ntsig yuav dhau los ua ib qho tseem ceeb hauv lub neej yav tom ntej.
Ntsuab thiab ib puag ncig phooj ywg HPMC tsis tuaj yeem tsuas txo qhov kev cuam tshuam ntawm ib puag ncig, tab sis kuj tseem muab txoj kev ua haujlwm zoo nyob hauv kev tsim kho.
Kev ua tau zoo:
Los ntawm kev ua kom zoo cov qauv molecular ntawm HPMC, Kev Tsim Nyog HPMC, cov khoom lag luam HPMC yog tsim kom tau raws li cov kev thov ua kom tiav nrog kev ua haujlwm siab dua.
Piv txwv li, los ntawm kev kho cov degree hloov chaw thiab hnyav hnyav ntawm HPMC, cov khoom lag luam nrog cov viscosity thiab cov dej muaj zog dua tuaj yeem tsim kho.
Daim ntawv thov ntse:
Nrog rau kev txhim kho cov ntaub ntawv txuj ci, ntse teb HPMC yog thov kom hloov kho nws tus kheej, xws li hloov kho dej rov qab nyob rau hauv cov av noo.
HPMC zoo cellulose HPMC tuaj yeem ua haujlwm zoo dua thiab muab cov dej ua kom zoo dua thiab txhim kho kev tsim kho cov qauv tshuaj xis thiab cov khoom siv lub cev. Los ntawm kev xaiv los ntawm kev xaiv thiab ua kom zoo dua kev siv HPMC, qhov kev ua tau zoo tshaj plaws ntawm cov cement txhim kho kom tau raws li qhov kev xav tau ntawm cov xwm txheej sib txawv. Yav tom ntej, ntsuab, kev ua tau zoo thiab ntse tshaj plaws kev tsim kho HPMC yuav ntxiv txhawb nws daim ntawv thov thiab kev loj hlob hauv cov ntaub ntawv hauv tsev.
Lub Sijhawm Post: Jun-21-2024