Abstract:
Nyob rau hauv xyoo tas los no, cov txheej txheem dej-raws li tau txais kev saib xyuas thoob plaws vim lawv qhov kev phooj ywg ib puag ncig thiab cov ntsiab lus tsis muaj zog ntawm cov organic (VOC). Hydroxyethylcellulose (HEC) yog siv dav hauv dej-soluble polymer nyob rau hauv cov formulations, ua ib tug thickener kom viscosity thiab tswj rheology.
qhia:
1.1 Keeb kwm:
Cov dej-raws li txheej txheej tau dhau los ua ib qho kev tiv thaiv ib puag ncig rau cov tshuaj hnyav-raws li cov txheej txheem, daws teeb meem cuam tshuam txog kev hloov pauv ntawm cov organic compound emissions thiab kev cuam tshuam ib puag ncig. Hydroxyethylcellulose (HEC) yog ib qho cellulose derivative uas yog cov khoom tseem ceeb hauv kev tsim cov dej-raws li txheej txheej thiab muab rheology tswj thiab ruaj khov.
1.2 Lub Hom Phiaj:
Tsab ntawv xov xwm no yog txhawm rau txheeb xyuas cov yam ntxwv solubility ntawm HEC hauv cov txheej txheem dej thiab kawm txog kev cuam tshuam ntawm ntau yam ntawm nws cov viscosity. Kev nkag siab txog cov yam ntxwv no yog qhov tseem ceeb rau kev txhim kho cov txheej txheem txheej txheej thiab ua tiav qhov kev xav tau.
Hydroxyethylcellulose (HEC):
2.1 Cov qauv thiab kev ua haujlwm:
HEC yog cellulose derivative tau los ntawm etherification cov tshuaj tiv thaiv ntawm cellulose thiab ethylene oxide. Kev taw qhia ntawm cov pab pawg hydroxyethyl rau hauv cov pob txha cellulose pab txhawb rau nws cov dej solubility thiab ua rau nws muaj txiaj ntsig zoo polymer hauv cov tshuab dej. Cov qauv molecular thiab cov khoom ntawm HEC yuav raug tham kom ntxaws.
Solubility ntawm HEC hauv dej:
3.1 Yam cuam tshuam rau solubility:
Lub solubility ntawm HEC nyob rau hauv dej yog cuam tshuam los ntawm ntau yam, xws li kub, pH, thiab concentration. Cov xwm txheej no thiab lawv qhov cuam tshuam rau HEC solubility yuav raug tham, muab kev pom rau cov xwm txheej uas nyiam HEC kev sib cais.
3.2 Solubility txwv:
Nkag siab txog qhov txwv siab thiab qis solubility ntawm HEC hauv dej yog qhov tseem ceeb rau kev tsim cov txheej txheem nrog kev ua haujlwm zoo. Tshooj lus no yuav piav qhia txog qhov ntau ntawm cov ntsiab lus uas HEC nthuav tawm qhov siab tshaj plaws solubility thiab qhov tshwm sim ntawm kev tshaj li cov kev txwv no.
Txhim kho viscosity nrog HEC:
4.1 Lub luag haujlwm ntawm HEC hauv viscosity:
HEC yog siv los ua cov thickener nyob rau hauv dej-raws li txheej txheej los pab ua kom viscosity thiab txhim kho tus cwj pwm rheological. Cov txheej txheem uas HEC ua tiav viscosity tswj yuav raug tshawb nrhiav, hais txog nws cov kev cuam tshuam nrog dej molecules thiab lwm yam khoom xyaw hauv txheej txheej txheej.
4.2 Cov txiaj ntsig ntawm cov qauv hloov pauv ntawm viscosity:
Ntau yam kev hloov pauv, suav nrog HEC concentration, qhov kub thiab txias, thiab tus nqi shear, tuaj yeem cuam tshuam rau cov viscosity ntawm cov txheej txheem dej. Tshooj lus no yuav txheeb xyuas qhov cuam tshuam ntawm cov kev hloov pauv no ntawm cov viscosity ntawm HEC-muaj cov txheej txheem los muab kev pom zoo rau cov qauv tsim.
Cov ntawv thov thiab kev cia siab yav tom ntej:
5.1 Industrial applications:
HEC yog dav siv nyob rau hauv ntau yam kev lag luam daim ntaub ntawv xws li xim, nplaum thiab sealants. Tshooj lus no yuav qhia txog cov kev koom tes tshwj xeeb ntawm HEC rau cov txheej txheem dej hauv cov ntawv thov no thiab sib tham txog nws qhov zoo dua lwm cov thickeners.
5.2 Cov lus qhia kev tshawb fawb yav tom ntej:
Raws li qhov kev thov rau cov txheej txheem ua tau zoo thiab kev ua tau zoo txuas ntxiv mus ntxiv, cov lus qhia kev tshawb fawb yav tom ntej hauv HEC-based formulations yuav raug tshawb nrhiav. Qhov no yuav suav nrog kev tsim kho tshiab hauv HEC hloov kho, cov txheej txheem tsim tshiab, thiab cov txheej txheem ua tus cwj pwm zoo.
nyob rau hauv xaus:
Ua kom tiav cov kev tshawb pom tseem ceeb, ntu no yuav qhia txog qhov tseem ceeb ntawm kev solubility thiab kev tswj viscosity hauv cov txheej txheem dej siv HEC. Kab lus no yuav xaus nrog cov txiaj ntsig zoo rau cov tsim qauv thiab cov lus pom zoo rau kev tshawb fawb ntxiv los txhim kho kev nkag siab ntawm HEC hauv cov kab dej hauv dej.
Post lub sij hawm: Dec-05-2023