Hydroxyether Metherylulose (HEMC) yog cov khoom siv nonculose ether, uas yog cov khoom siv hydroxyethylating methylcellulose (mc). HEMC muaj ntau yam tshuaj thiab tshuaj lom neeg lub cev, uas ua rau nws dav siv hauv kev tsim kho, tshuaj, khoom noj thiab lwm thaj teb.
1. Solubility thiab Solubility
HEMC muaj solubility zoo hauv dej. Nws tuaj yeem ua tau sai sai rau hauv dej txias los tsim ib qho kev daws teeb meem lossis cov kev daws teeb meem, nws cov kev daws teeb meem uas nthuav qhia cov khoom siv hom phiaj. Cov tshuaj aqueous ntawm HEMC muaj Pseudoplastic a, uas yog, raws li tus nqi shear nce, lub viscosity ntawm kev daws teeb meem. Cov cuab yeej no ua rau nws zoo heev rau hauv cov ntawv thov xws li cov duab kos duab kos duab thiab cov nplaum.
2. Thickening
HEMC muaj cov khoom siv thicking zoo heev thiab tuaj yeem ua kom muaj kuab paug ntawm cov tshuab dej. Nws cov nyhuv thickening tsis tsuas yog cuam tshuam nrog cov molecular hnyav, tab sis kuj tseem yuav muaj ntau yam xws li kev caw, P nqi thiab qhov ntsuas ntawm kev daws. HEMC tau dav siv hauv cov ntaub ntawv hauv tsev xws li cov khoom sib xyaw ua ke thiab cov khoom siv gypsum thiab gypsum raws li nws cov nyhuv tuab me ntsis ua rau kev taug.
3. Dej tuav
HEMC muaj cov dej zoo khaws cia, uas ua rau nws muaj qhov tseem ceeb ntxiv hauv cov ntaub ntawv hauv tsev. Nws tuaj yeem khaws cov noo noo hauv cov ntaub ntawv caas-raws li, ntev ntev lawv qhib lub sijhawm, thiab txhim kho cov khoom siv ua haujlwm thiab tsim kho cov khoom siv. Tsis tas li ntawd, cov dej khaws cia ntawm HEMC kuj tseem ua rau nws siv dav ua cov tshuaj pleev, cov khoom noj, uas tuaj yeem tiv thaiv cov dej hauv cov txheej txheem los ntawm kev nqus tau sai heev.
4. Zaj duab xis-tsim cov khoom
HEMC tuaj yeem tsim cov yeeb yaj kiab tsis zoo ntawm cov nplaim nrog cov yeeb yaj kiab zoo-ua yeeb yam. Cov yeeb yaj kiab no muaj qee lub zog thiab kev tawv, thiab tuaj yeem siv los tiv thaiv cov txheej txheej thiab tiv thaiv kev nkag mus. Cov yeeb yaj kiab ua yeeb yam ua nws muaj cov ntawv thov tseem ceeb hauv cov xim, pleev xim, cov neeg sawv cev thiab lwm thaj teb.
5. Kev ruaj khov
HEMC muaj cov tshuaj ruaj khov thiab kev ua siab ntev rau cov kua qaub acid thiab alkali. Nws cov kua aqueous tseem nyob ruaj khov nyob rau hauv cov hluav taws xob dav (feem ntau 2-12) thiab tsis yog nquag ua rau gelation lossis nag lossis daus. Tsis tas li ntawd, hemc tseem muaj qee yam kev ruaj ntseg rau lub teeb, kub thiab oxidation, kom nws tseem tuaj yeem ua haujlwm nyob rau hauv cov xwm txheej hnyav.
6. BiCompatibility thiab kev nyab xeeb
HEMC yog qhov tsis-ionic sib txuas uas feem ntau tsis ua rau kev ua xua lossis lwm yam kev tsis zoo thiab muaj kev cuam tshuam zoo thiab muaj kev cuam tshuam zoo biocompatibility. Yog li ntawd, nyob rau hauv cov qauv ntawm cov tshuaj thiab cov khoom noj, hemc feem ntau siv los ua cov tuab, stabilizer thiab cov ntsiav tshuaj. Nws muaj kev nyab xeeb ua rau nws dav siv hauv kev tu tawv nqaij thiab cov khoom saib xyuas tus kheej.
7. Ntsev tsis kam
Piv nrog rau lwm hom ntawm cellulose neeg muaj kev hais txog, HEMC tau ua siab ntev rau electrolytes. Nws tseem tuaj yeem tswj cov viscosity zoo thiab ruaj khov hauv cov tshuab uas muaj cov ntsev ntau ntau yam ntawm ntsev. Cov yeeb yam no muab qhov zoo hauv qee cov ntawv thov tshwj xeeb, xws li ua kom cov kua dej tshwj xeeb hauv cov roj sib raug zoo.
8. Lubricity thiab Kev Ncua
HEMC cov kev daws teeb meem muaj lubricity zoo thiab raug ncua, uas tuaj yeem txhim kho kom zoo thiab kev ua haujlwm ntawm kev tsim kho. Qhov no yog qhov tshwj xeeb tshaj nyob rau hauv cov khoom siv casent-based, uas tuaj yeem txhim kho cov haujlwm ua haujlwm thiab kev tawm tsam sagging ntawm cov khoom siv.
Hydroxyether Metherylulose tau siv dav hauv cov ntaub ntawv hauv tsev, tshuaj, tshuaj pleev zaub mov, tshuaj ntxuav kom huv, dej tuav, ua yeeb yaj kiab, zaj duab xis-ua thiab ruaj khov. Nws cov yam ntxwv tsis-ionic, zoo biocompatibility thiab ruaj khov ua rau nws ua tau lub luag haujlwm tseem ceeb hauv ntau qhov kev siv khoom lag luam.
Lub Sijhawm Post: Feb-17-2025