HydroxyPropy cellulose (HPMC) yog ib qho tseem ceeb siv cov tshuaj siv tau siv cov tshuaj khib nyiab qhuav. Raws li cov dej muaj dej-soluble polymer, HPMC yog ntau txoj haujlwm tseem ceeb hauv kev txhim kho kev tsim kho, txhim kho cov txheej txheem zoo, thiab ua kom zoo dua qub.
1. Cov khoom yooj yim ntawm HPMC
HPMC yog cov neeg tsis muaj ionic ether tau los ntawm kev tiv thaiv kab mob ntawm cellulose nrog rau methanol thiab propylene glycol tom qab kev kho mob alkali. Nws muaj cov khoom hauv qab no:
Cov dej ua kom zoo solubility: nws tuaj yeem yaj sai nyob rau hauv cov dej txias thiab dej kub kom tsim lub pob tshab colloidal.
Muaj zog ruaj khov: nws muaj zog tsis kam rau cov kev cuam tshuam tshuaj xws li acid, alkali, ntsev thiab enzymatic hydrolysis.
Thickening: nws tuaj yeem nce viscosity ntawm kev daws teeb meem thiab yog ib qho tuab tuab tuab.
Dej khaws cia: hauv cov ntaub ntawv tsim tsev, nws tuaj yeem khaws cov dej noo thiab lub sijhawm qhuav.
Zaj duab xis-tsim: nws tuaj yeem tsim zaj duab xis tawv nyob rau saum npoo ntawm cov khoom los txhim kho kom zoo thiab ruaj khov.
2. Mechanism ntawm kev ua ntawm HPMC hauv cov kab cug qhuav qhuav
Lub luag haujlwm ntawm HPMC hauv qhuav-cug cug yog mas ntau ntawm cov hauv qab no:
Thickening nyhuv: HPMC tuaj yeem ua kom lub viscosity ntawm cug, ua kom nws tsim thiab ua haujlwm. Qhov no ua kom tuab yuav txo cov sagging thiab drooping ntawm cug cug thaum daim ntawv thov, kom ntseeg tau nws cov kev sib txawv thiab cov nplaum.
Dej retention nyhuv: HPMC tuaj yeem khaws cov dej khib nyiab hauv cov tshuaj khib nyiab thiab ncua nws lub sijhawm kom qhuav. Qhov dej cia siv cov dej no tuaj yeem txo cov dej txau thaum lub tshuaj tua hluav taws xob ua kom qhuav, txo cov phom sij, thiab txhim kho qhov kev pheej hmoo zoo nkauj, thiab txhim kho qhov kev pheej hmoo zoo.
Txhim kho Cug Rhineology: HPMC tuaj yeem hloov kho cov rhebology ntawm kev ua haujlwm ntawm kev sib xyaw thiab kev tsim kho, txhim kho kev tsim kho thiab ua tau zoo.
Los tiv thaiv cov nyhuv tawg: los ntawm kev txhim kho cov dej cug, HPMC tuaj yeem txo cov teeb meem ntawm cug lub tshuaj tsuag thaum muab tag nrho cov kev ua tau zoo ntawm cug.
Txhim kho txoj kev sib raug zoo: HPMC txhim kho txoj kev khib ntawm cug thiab substrate, yog li ntawd cov kab cap tuaj yeem txuas tau tom qab kev tsim kho, txo qhov tau poob qis thiab hollowing.
3. Qhov zoo ntawm HPMC hauv cov tshuaj khib qhuav qhuav
Daim ntawv thov ntawm HPMC hauv kev tsim cov tshuaj khib qhuav muaj qhov tseem ceeb:
Txhim kho kev tsim kho kev tsim kho: HPMC tuaj yeem txhim kho colut ntawm qhuav-mixer rau kev ua haujlwm thiab siv tau yooj yim thiab siv sijhawm tsim kho.
Txhim kho cov khoom lag luam zoo: HPMC txhim kho cov dej khaws cia, viscosity thiab catching tsis kam ntawm qhuav-sib nphu thiab txhua yam zoo ntawm cug.
Txo Nqi: HPMC tuaj yeem txo qis kev tsim kho thiab txij nkawm los ntawm kev txhim kho cov teeb meem tsim kho tau zoo thiab txo cov teeb meem zoo.
Cov phooj ywg ib puag ncig: ua cov khoom siv polymer, HPMC muaj cov phooj ywg zoo thiab ib puag ncig ua phooj ywg, thiab yog ib qho tseem ceeb ntawm cov khoom siv hauv tsev ntsuab.
4. Daim Ntawv Thov piv txwv ntawm HPMC hauv cov tshuaj khib nyiab qhuav-sib xyaw
Hauv cov ntawv thov tshwj xeeb, HPMC tau siv dav hauv cov khoom lag luam xws li cov av nplaum, thermal rwb thaiv tsev, thiab kev lag luam tsis zoo. Piv txwv li:
Pobzeb nplaum: nyob rau hauv cov nplais nplaum, HPMC muab cov nplaum thiab dej zoo, kom cov vuas luaj tuaj yeem txuas nrog phab ntsa lossis hauv av.
Rwb thaiv kev luj: HPMC txhim kho cov dej tuav thiab fellity ntawm retingion cug, txhim kho nws cov txiaj ntsig kev ua tau zoo thiab nthuav nws lub neej kev pabcuam.
Tus kheej-leveling cug: nyob rau hauv tus kheej-level cug, hpmc txhim kho cov khoom siv fluidity thiab ruaj khov ntawm cov khoom, cia nws faib tau thiab sololified kom ua ib qho chaw du.
5. Yav Tom Ntej Kev Loj Hlob
Nrog kev txhim kho txuas ntxiv ntawm kev tsim kho cov kev tsim kho thiab ua haujlwm tau zoo, HPMC muaj qhov dav kev cia siab hauv cov khoom sib xyaw qhuav. Cov lus qhia txog yav tom ntej muaj xws li:
Kev tiv thaiv ib puag ncig ib puag ncig: Tsim cov khoom lag luam HPMC zoo thiab tsis tu ncua los txo qhov kev cuam tshuam rau ib puag ncig.
Kev Ua Haujlwm Kom Zoo Dua: Txuas ntxiv rau cov qauv thiab kev ua haujlwm ntawm HPMC kom ua tau raws li cov kev siv kev tsim kho thiab kev siv cov xwm txheej.
Tus nqi tswj: txo cov nqi ntau lawm
Qhov tseem ceeb ntawm HPMC hauv kev tsim cov cug tov qhuav qhuav yog tus kheej. Nws tseem txhim kho kev tsim kho cov kev tsim kho thiab cov khoom zoo ntawm qhuav-tov dej los ntawm thickening, txhim kho rheology, thiab txhim kho cov kab zoo nkauj. Yav tom ntej, HPMC yuav txuas ntxiv mus ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov ntaub ntawv hauv tsev thiab txhawb nqa txoj kev loj hlob ntawm cov tsev ntsuab thiab txuag tau zoo.
Lub Sijhawm Post: Feb-17-2025