HEC (Hydroxyethyl cellulose) yog cov cellulose celluluic etle dav siv hauv kev lag luam txheej. Nws cov haujlwm muaj xws li tuab, tawg, kev ncua thiab ruaj khov, uas tuaj yeem txhim kho kev ua haujlwm zoo thiab zaj duab xis-ua rau kev ua haujlwm zoo. HEC tshwj xeeb yog siv ntau dua hauv cov dej pleev dej vim tias nws muaj cov dej solubility zoo thiab tshuaj lom neeg ruaj khov.
1. Mechanism ntawm kev ua ntawm HEC
Thickening nyhuv
Ib qho ntawm cov haujlwm tseem ceeb ntawm HEC hauv cov txheej txheej yog thickening. Los ntawm kev nce qib ntawm txheej viscosity ntawm txheej txheej, txheej txheej txheej thiab leveling cov khoom tuaj yeem raug txo kom zoo, thiab txheej sagging tuaj yeem ua ib qho kev sib tw npog ntawm phab ntsa lossis lwm qhov chaw. Tsis tas li ntawd, HEC muaj lub peev xwm ua kom muaj zog zoo, yog li nws tuaj yeem ua tiav cov nyhuv tuab tuab uas nrog ib qho nyiaj tsawg ntxiv, thiab muaj kev lag luam siab.
Ncua thiab Ruaj Khov
Nyob rau hauv lub txheej txheej txheej, khoom siv xws li pigments thiab fillers yuav tsum yog tusyees dispersed hauv cov khoom siv, lwm yam yuav cuam tshuam cov tsos thiab kev ua tau zoo ntawm txheej. HEC tuaj yeem tswj cov kev faib tawm tsis zoo ntawm cov khoom ntawm cov khoom, tiv thaiv nag lossis daus, thiab ua kom cov txheej ruaj khov thaum khaws cia. Qhov kev kawm raug tshem tawm no tso cai rau txheej txheem rov qab mus rau lub xeev tsis zoo tom qab lub sijhawm khaws cia ntev, txo qis zog, los nag.
Dej ceev
HEC tuaj yeem pab cov dej nyob hauv cov xim yuav tsum tau tso tawm qeeb thaum lub sijhawm pleev xim rau lub sijhawm kom qhuav thiab ua yeeb yaj kiab ua ke ntawm phab ntsa. Qhov kev ua tau zoo no ua rau cov nyhuv siv tau tshwj xeeb rau cov nyhuv siv, HEC muaj peev xwm txo qhov teeb meem tsis zoo lossis qhuav dej tsis zoo.
Rheological kev cai
Cov khoom sib dhos ntawm cov xim ncaj qha cuam tshuam rau cov kev xav thiab zaj duab xis ntawm kev tsim kho. Cov kev daws teeb meem tsim los ntawm Hec tom qab ua rau dej hauv dej muaj pseudoploastic, uas yog, xws li txhuam thiab dov), uas yog qhov yooj yim txhuam; Tab sis cov viscosity rov qab nyob rau hauv qis shear zog, uas tuaj yeem txo sagging. Qhov no tsis tsuas yog pab txhawb kev tsim kho, tab sis kuj ua kom muaj kev sib txawv thiab tuab ntawm txheej.
2. Qhov zoo ntawm Hec
Zoo dej solubility
HEC yog dej-soluble polymer. Cov kev daws teeb meem tom qab kev sib tham yog qhov tseeb thiab pob tshab, thiab tsis muaj qhov cuam tshuam zoo rau cov xim xim xim. Nws solubility kuj txiav txim nws yooj yim ntawm kev siv nyob rau hauv cov xim pleev xim, thiab nws tuaj yeem yaj tawm sai sai uas tsis tau ua rau cov lus lossis agglomerates.
Tshuaj Muaj Peev Xwm
Raws li cov tsis-ionic cellulose ither, HEC muaj cov tshuaj ruaj khov zoo thiab tsis yooj yim cuam tshuam los ntawm cov lus xws li pH, thiab hlau ions. Nws tuaj yeem nyob ruaj khov hauv cov kua qaub muaj zog thiab cov ib puag ncig alkaline, yog li nws tuaj yeem hloov kho ntau hom ntawm cov tshuab txiav.
Kev tiv thaiv ib puag ncig
Nrog kev txhim kho ntawm kev paub txog ib puag ncig, qis dua voc (volatile organic compound) cov txheej txheem yog ua ntau dua thiab nrov dua. HEC yog tsis muaj tshuaj lom, tsis muaj mob, tsis muaj cov kuab tshuaj organic, thiab muaj kev tiv thaiv ib puag ncig hauv ib puag ncig ntawm cov dej ib puag ncig.
3. Cov nyhuv ntawm HEC hauv cov ntawv thov siv
Sab hauv phab ntsa txheej ntsa
Hauv Txheej Txheem Phab ntsa sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv sab hauv Tsis tas li ntawd, vim nws txoj kev cia dej zoo, HEC tuaj yeem tiv thaiv cov kab nrib pleb lossis hmoov ntawm phab ntsa sab hauv lub teeb thaum lub sijhawm ua kom qhuav.
Sab Nrauv phab ntsa Txheej
Sab Nrauv phab ntsa sab nrauv yuav tsum muaj huab cua zoo tsis kam thiab dej tsis kam. HEC tsis tuaj yeem txhim kho cov dej khaws cia thiab cov roj, tab sis kuj txhim kho cov khoom siv tawm hws, yog li kuj tau ua kom zoo dua qub cua thiab nag tom qab kev tsim kho lub neej.
Looj xim
Hauv cov xim xim looj, HEC tsis tuaj yeem tsuas ua raws li cov tuab dua, tab sis kuj tseem txhim kho lub txiaj ntsig zoo ntawm cov xim pleev xim thiab ua cov xim yeeb yaj kiab smoother. Nyob rau tib lub sijhawm, HEC tuaj yeem tiv thaiv cov nag lossis daus ntawm cov xim muaj zog ntawm cov xim, thiab ua kom cov xim zoo nkauj tas li tom qab lub sij hawm ntev cia.
IV. Xyuam xim rau kev ntxiv thiab siv HEC
Cov Qauv Piav Qhia
HEC feem ntau ntxiv rau cov xim hauv daim ntawv hmoov. Thaum siv, nws yuav tsum tau maj mam ntxiv rau hauv dej thiab ua kom tiav kom yaj nws tusyees. Yog tias kev sib cais tsis txaus, cov tshuaj yeeb zoo yuav tshwm sim, cuam tshuam rau cov tsos zoo ntawm cov xim.
Ntsej Muag Kev Tswj Xyuas
Tus nqi ntawm Hec yuav tsum tau hloov kho raws li cov qauv ntawm cov xim pleev xim thiab cov nyhuv tuab. Cov nyiaj ntxiv yog 0.3% -1.0% ntawm tag nrho cov nyiaj. Rau kev ntxiv ntxiv yuav ua rau cov xim viscosity los siab dhau, cuam tshuam rau kev ua haujlwm tsim kho; Pheej tsis txaus yuav ua rau muaj teeb meem xws li sagging thiab tsis paub tsis pub muaj hwj chim.
Compatibility nrog lwm cov khoom xyaw
Thaum siv HEC, them sai sai rau kev sib xyaw nrog lwm cov xim cov khoom xyaw, fitres, thiab lwm yam lossis ntau npaum li cas ntawm HEC yuav tsum tau hloov kho kom tsis txhob muaj kev sib raug zoo.
Hec ua lub luag haujlwm tseem ceeb hauv kev lag luam txheej xim, tshwj xeeb tshaj yog hauv cov dej pleev dej. Nws tuaj yeem txhim kho lub zog ua haujlwm, kev ua yeeb yaj kiab ua yeeb yam thiab kev tso cai ruaj ntseg ntawm cov txheej txheem, thiab muaj kev tiv thaiv zoo thiab ib puag ncig kev tiv thaiv. Raws li tus nqi-siv cov tuab tuab thiab ua kom zoo dua qub, HEC tau dav siv nyob rau sab hauv phab ntsa sab hauv phab ntsa thiab cov xim tsev sab nrauv. Hauv cov kev siv cov tswv yim, los ntawm kev tswj hwm kev tswj hwm tsim nyog thiab kho cov txiaj ntsig zoo tshaj plaws thiab muaj zog rau kev ua kom muaj zog zoo tshaj plaws ntawm kev ua tau zoo ntawm cov txheej txheem.
Lub Sijhawm Post: NOV-01-2024