Kev soj ntsuam ntawm cov laj thawj rau kev cuam tshuam ntawm cov hau kev sib txawv ntxiv ntawm hydroxyethyl cellulose ntawm cov xim pleev xim rau looj xim looj
Hydroxyethyl cellulose (HEC) yog ib qho tuab tuab thiab emulsifier, uas yog dav siv nyob rau hauv looj cov xim pleev xim. Nws lub luag haujlwm tseem ceeb yog txhawm rau nce viscosity ntawm cov xim, txhim kho cov rhuaology, txhim kho cov txheej txheem ntawm cov txheej txheem hydroxyethyl yuav muaj cov xim sib txawv ntawm kev ua yeeb yam ntawm cov xim huv.
1. Ntxiv txoj kev ntawm hydroxyethyl cellulose
Hauv cov txheej txheem ntau lawm ntawm cov xim pleev xim rau looj, feem ntau ntxiv cov qauv hydroxyethyl cellulose: kev ntxiv cov txheej txheem thiab ua ntej-xaus.
Ntxiv txoj kev: Ntxiv hydroxyethyl cellulose ncaj qha rau lub looj kua pleev xim, feem ntau yog tom qab dispersed, thiab do tusyees. Hom no yooj yim thiab yooj yim, tab sis nws yuav ua rau tsis tiav ntawm hydroxyethyl cellulose, uas nyob rau hauv lem cuam tshuam rau rheological yam ntxwv ntawm cov xim.
Kev rho tawm ntxiv cov txheej txheem: Dispers hydroxyethyl cellulose nrog ib feem ntawm cov dej los yog kuab ua ntej, thiab tom qab ntawd ntxiv nws rau cov xim pleev xim. Cov qauv no pab kom zoo dua li dispers wydroxyethyl cellulose thiab zam nws tsim ntawm agglomerates, yog li kev txhim kho lub viscosity thiab ruaj khov ntawm cov xim.
Pre-ableolution txoj kev: Daws Fydroxyethyl cellulose nrog tus nqi uas tsim nyog rau kev daws teeb meem tsis zoo, thiab tom qab ntawd ntxiv nws rau cov xim huv. Hom no tuaj yeem ua kom paub tseeb tias hydroxyethyl cellulose yog tag nrho cov kab ke, uas nws tau ua kom zoo thiab muaj fluidity thaum lub sij hawm txheej.
2. Qhov cuam tshuam ntawm cov kev sib txawv ntxiv ntawm kev ua tau zoo ntawm cov xim yas tshuab
2.1 rheology thiab thixotropy
Rheology yog hais txog cov khoom ntiag tug ntws hauv qab quab yuam sab nraud, thiab thixotropy yog hais txog cov khoom uas lub viscosity ntawm kev hloov pauv hauv kev ntxhov siab. Nyob rau hauv looj xim, hydroxyethyl cellulose raws li cov tuab tuab tuaj yeem txhim kho nws cov rheology thiab thixotrotropy puas txhim kho nws cov rheology thiab thixotrotropy.
Ib qho ntxiv txoj kev: Vim tias ua tiav tsis tiav ntawm hydroxyethyl cellulose, lub viscosity cellulose, qhov kev tawm tsam ntawm cov txheej. Ib qho ntxiv, ntxiv ntxiv hydroxyethyl cellulose yuav tsim agglomerates loj dua, ua rau tsis muaj kev ntseeg tsis khov ntawm cov xim thauv.
Ntxiv txoj kev ntxiv txoj kev: los ntawm kev zam tawm ntxiv, hydrotyl cellulose tuaj yeem zoo dua ntais ntawm cov xim thiab txhim kho lub viscotropy. Cov qauv no tuaj yeem txhim kho cov khoom siv hluav taws xob ntawm cov txheej txheej, yog li cov txheej txheej muaj cov khoom zoo dua thiab cov khoom siv zoo thaum lub sijhawm ua ntawv thov.
Pre-allectolution txoj kev: Tom qab ua ntej-dissolving hydroxyethyl cellulose los ua kom meej meej tias nws yog tag nrho cov tshwm sim ntawm agglomeration. Qhov no ua rau cov rheology thiab thixotropy ntawm cov txheej ua tau ua tiav cov txiaj ntsig zoo, tshwj xeeb tshaj yog thaum txheej, nws muaj kev zoo nkauj thiab du.
2.2 Kev ruaj khov ntawm cov txheej txheem
Qhov ruaj khov ntawm cov txheej yog hais txog nws lub peev xwm los tswj cov kev sib xws, tsis-stratification, thiab tsis muaj nag lossis los nag thaum siv thiab siv. Hydroxyethyl cellulose hauv looj cov xim tsuas yog tiv thaiv kev sedimentation ntawm cov pigments thiab fillers los ntawm kev txhim kho viscior.
Ntxiv txoj kev: Vim tias qhov solubility qis ntawm hydroxyethyl cellulose, nws yuav ua rau muaj kev sib cais tsis sib xws, yog li cuam tshuam kev ncua ntawm txheej. Qhov tsim ntawm agglomerates tsis tsuas yog txo cov ruaj khov ntawm txheej, tab sis kuj yuav ua rau cov neeg dhia dhia, tab sis kuj yuav ua rau lub sijhawm cia, cuam tshuam kev ua yeeb yam ntev ntawm txheej.
Kev rho tawm cov txheej txheem ntxiv: los ntawm pre-dispersing hydroxyethyl cellulose, nws tuaj yeem ntseeg tau tias nws tau txhim kho qhov ruaj ntseg ntawm txheej. Zoo dispersibilibility tuaj yeem ua tau zoo ua kom zoo rau cov pigments thiab fillers, kom ntseeg tau tias cov txheej txheej tswj kev sib dhos thaum lub sij hawm ntev cia.
Kev txiav txim siab ua ntej txoj kev: Cov qauv ua ntej yuav tuaj yeem rhuav tshem cov kev sib luag, yog li nws tuaj yeem txhim kho cov ruaj khov ntawm cov txheej. Cov txheej tsis tau ua rau stratification los yog sedimentation thaum lub sij hawm cia, ua kom muaj kev sib txawv thiab ruaj khov thaum siv.
2.3 Kev Tsim Kho Kev Ua Haujlwm
Kev tsim kho kev ua haujlwm tseem ceeb suav nrog kev hnav khaub ncaws, adhesion thiab kom qhuav nrawm ntawm txheej. Hydroxyethyl cellulose txhim kho kev tsim kho ntawm txheej los ntawm kev txhim kho fluidity, nce thixotrotropy thiab txuas lub sijhawm qhib.
Ntxiv txoj kev: Vim nws cov haujlwm solubility, txheej yuav ua rau xaim teeb duab lossis txhuam cov cim thaum tsim khoom, cuam tshuam rau cov txheej txheem kev sib txuam thiab ua rau cov txiaj ntsig kev tsim kho tsis zoo.
Kev rho tawm ntxiv txoj kev: los ntawm kev ntxiv hydroxyethyl cellulose tom qab dispersion, fluating ntawm cov txheej txheem txhim kho, ua kom cov txheej txheem kev tsim kho. Tsis tas li ntawd, cov dispersed hydroxyethyl cellulose tseem tuaj yeem txhim kho cov nplaum ntawm txheej, ua kom yooj yim dua rau cov txheej txheem rau ntawm lub npoo ntawm substrate thaum txhuam hniav.
Txoj kev ua ntej: Txoj kev ua ntej yuav pab hydroxyethyl cellu, txhim kho cov teeb meem qhib kev ua kom qhuav ntawm cov txheej txheem kev tsim kho, thiab txhim kho kev ua haujlwm ntawm cov txheej txheem kev tsim kho.
Qhov kev sib ntxiv ntawm hydroxyethyl cellulose muaj qhov cuam tshuam tseem ceeb ntawm kev ua yeeb yam ntawm cov xim huv. Cov txheej txheem ntxiv yog qhov yooj yim ua haujlwm, tab sis nws yuav ua rau tsis sib xws ntawm hydroxyethyl cellulose, cuam tshuam rau kev ntseeg cellulose, cuam tshuam rau cov rheology, kev ruaj khov thiab kev tsim kho cov txheej txheem; Cov kev tsis sib xws ntxiv txoj kev thiab predicolution txoj kev tuaj yeem ua kom muaj hydrothethyl cellulose yog tag nrho cov rheology, ruaj khov thiab kev tsim kho cov txheej txheem. Zuag qhia tag nrho, txoj kev ua ntej yuav tsum muab cov txheej txheem txheej zoo tshaj plaws, tshwj xeeb tshaj yog hais txog rheology zoo tshaj plaws, kev ruaj khov thiab kev tsim kho. Raws li cov kev xav tau ntau lawm ntau lawm thiab kev xaiv, xaiv cov qauv ntxiv tuaj yeem ua lub luag haujlwm zoo dua ua si lub luag haujlwm ntawm cov xim pleev xim hauv cov xim huv.
Lub Sijhawm Post: Feb-20-2025