1. Teeb meem Txheej txheem cej luam
Hydroxyethyl cellulose (HEC)yog lub thickener thiab rheology hloov kho dav siv hauv cov xim latex, uas tuaj yeem txhim kho cov viscosity, leveling thiab cia ruaj khov ntawm cov xim. Txawm li cas los xij, hauv kev siv tswv yim, HEC qee zaum ua rau cov pob zeb ua kom muaj zog, cuam tshuam rau cov tsos, kev tsim kho thiab kev ruaj ntseg ntawm cov xim.
2. Kev tshuaj xyuas qhov ua rau ntawm cov khoom siv lead ua
Kev puas tsuaj tsis txaus: Kev sib cais ntawm HEC hauv dej yuav tsum muaj kev sib xyaw tshwj xeeb thiab lub sijhawm. Tsis txaus dissolution yuav ua rau lub zos oversaturation, yog li ua crystalline nag lossis daus.
Cov teeb meem dej tsis zoo: Siv cov dej tawv los yog dej nrog cov impurities ntau dua yuav ua rau HEC hnov mob nrog cov hlau ions (xws li Ca²⁺, Mg²⁺) los ua cov dej tsis sib haum.
Cov mis tsis ruaj khov: Qee cov tshuaj ntxiv hauv cov mis (xws li cov tshuaj tua kab mob, cov tshuaj tua kab mob) tuaj yeem cuam tshuam tsis zoo nrog HEC, ua rau nws ua rau nag lossis daus thiab tsim cov pob zeb.
Kev cia khoom tsis raug: Qhov kub thiab txias ntau dhau los yog cia ntev ntev yuav ua rau HEC rov ua dua los yog condense, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias ib puag ncig.
pH tus nqi hloov pauv: HEC yog rhiab heev rau pH, thiab qhov chaw acidic lossis alkaline tsis tshua muaj peev xwm ua rau nws qhov sib npaug sib npaug thiab ua rau cov dej nag.
3. Kev daws teeb meem
Hauv kev teb rau cov teeb meem saum toj no, cov kev ntsuas hauv qab no tuaj yeem ua kom zam lossis txo qhov tshwm sim ntawm HEC tsim cov muaju hauv cov xim latex:
Txhim kho txoj kev sib cais ntawm HEC
Siv cov txheej txheem ua ntej dispersion: ua ntej maj mam sprinkle HEC rau hauv cov dej hauv qab qis-ceev nplawm kom tsis txhob agglomeration los ntawm cov tswv yim ncaj qha; ces cia nws sawv ntsug rau ntau tshaj 30 feeb kom ntub nws tag, thiab thaum kawg do nws ntawm kev kub ceev kom txog thaum nws yaj tag.
Siv cov txheej txheem dej kub dissolution: dissolving HEC hauv dej sov ntawm 50-60 ℃ tuaj yeem ua kom cov txheej txheem tawg, tab sis tsis txhob kub siab heev (dhau 80 ℃), txwv tsis pub nws yuav ua rau HEC degradation.
Siv cov kuab tshuaj uas tsim nyog, xws li me me ntawm ethylene glycol, propylene glycol, thiab lwm yam, los txhawb kev sib cais ntawm HEC thiab txo cov crystallization tshwm sim los ntawm ntau lub zos concentration.
Txhim kho dej kom zoo
Siv cov dej deionized los yog cov dej softened es tsis txhob siv cov kais dej zoo tib yam los txo cov kev cuam tshuam ntawm cov hlau ions.
Ntxiv tus nqi tsim nyog ntawm tus neeg saib xyuas chelating (xws li EDTA) rau cov xim pleev xim latex tuaj yeem txhim kho cov kev daws teeb meem zoo thiab tiv thaiv HEC los ntawm kev cuam tshuam nrog cov hlau ions.
Optimize tus qauv tsim
Tsis txhob ntxiv cov tshuaj ntxiv uas tsis sib haum nrog HEC, xws li qee cov tshuaj ntsev ntau los yog qee yam tshuaj tua kab mob. Nws raug nquahu kom ua qhov kev sib tw ua ntej siv.
Tswj tus nqi pH ntawm latex xim ntawm 7.5-9.0 los tiv thaiv HEC los ntawm precipitating vim pH rhiab heev.
Tswj cov xwm txheej cia
Qhov chaw khaws cia ntawm cov xim latex yuav tsum muaj qhov kub thiab txias (5-35 ℃) thiab zam qhov kub thiab txias ib puag ncig mus ntev.
Khaws nws kaw kom tiv thaiv kom tsis txhob ya raws evaporation los yog paug, zam lub zos nce hauv HEC concentration vim hnyav volatilization, thiab txhawb crystallization.
Xaiv qhov zoo HEC ntau yam
Ntau hom HEC muaj qhov sib txawv ntawm solubility, viscosity, thiab lwm yam. Nws raug nquahu kom xaiv HEC nrog qib siab ntawm kev hloov pauv thiab qis viscosity kom txo tau nws txoj kev nyiam crystallize ntawm qhov siab siab.
Los ntawm optimizing lub dissolution hom ntawmHEC, kev txhim kho dej zoo, kho cov mis, tswj qhov chaw cia thiab xaiv qhov tsim nyog HEC ntau yam, tsim cov muaju hauv cov xim latex tuaj yeem zam tau zoo lossis txo qis, yog li txhim kho kev ruaj ntseg thiab kev tsim kho ntawm latex xim. Hauv cov txheej txheem tsim khoom tiag tiag, cov phiaj xwm kev hloov kho yuav tsum tau ua raws li cov xwm txheej tshwj xeeb kom ntseeg tau cov khoom zoo thiab cov neeg siv kev paub.
Post lub sij hawm: Mar-26-2025