Hydroxyethylulose (HEC) yog qhov tsis muaj kev paub, dej-soluble polymer muab tau los ntawm cellulose. Vim nws cov khoom siv hluav taws xob tshwj xeeb, nws yog feem ntau siv nyob rau hauv ntau yam kev lag luam suav nrog kev lag luam kws tshuaj, tshuaj pleev ib ce thiab kev tsim kho. Ib qho ntawm cov yam ntxwv tseem ceeb ntawm hydroxyethyl cellulose yog nws viscosity cellulose yog nws lub luag hauj lwm tseem ceeb hauv kev txiav txim siab nws cov kev ua tau zoo hauv cov ntawv thov sib txawv.
Viscosity yog ib qho kev ntsuas ntawm cov kua dej tsis kam mus ntws. Nyob rau hauv rooj plaub ntawm hydroxyethylcellulose, nws viscosity cuam tshuam los ntawm ntau yam, suav nrog kev xav, kub thiab shear tus nqi. Nkag siab txog cov xwm txheej no yog qhov tseem ceeb los ua kom siv HEC hauv cov qauv sib txawv.
Lub viscosity ntawm hydroxyethylcellulose muaj zog nyob ntawm nws cov kev xav hauv kev daws teeb meem. Nyob rau hauv dav dav, raws li kev kub siab nce ntxiv, nws viscosity kuj nce. Tus cwj pwm no yog cov kev daws teeb meem polymer thiab feem ntau tau piav qhia los ntawm cov qauv muaj hwj chim uas muaj feem rau viscosity kom pom zoo.
Qhov kub kuj tseem muaj cov nyhuv tseem ceeb ntawm viscrocosity ntawm hydroxyethyl cellulose cellulose dols. Feem ntau, viscosity txo qis nrog kev nce kub. Qhov kub no rhiab yog qhov tseem ceeb rau kev siv uas yuav tsum tau hloov pauv hauv viscosity, xws li thaum ua ntawv siv rau sib txawv chaw.
Shear tus nqi yog lwm qhov tseem ceeb cuam tshuam rau lub viscrot ntawm hydroxyethyl cellulose. Shear tus nqi hais txog tus nqi ntawm cov dej uas nyob ib sab cov kua dej uas nyob ib sab txav mus rau ib leeg. Lub viscosity ntawm HEC cov kev daws teeb meem feem ntau ua rau cov khoom sib tw thinning tus cwj pwm, lub ntsiab lus uas yog tus nqi shear nce ntxiv, qhov viscosity txo. Cov cuab yeej no yog qhov zoo hauv kev siv xws li txheej thiab cov nplaum uas yooj yim ntawm daim ntawv thov.
Qhov hnyav molecular ntawm hydroxyethyl cellulose kuj txiav txim nws viscosity. Cov roj ntau dua cov dej hecs zoo li muaj viscosities ntau dua ntawm qhov kev pom zoo. Tus yam ntxwv no tseem ceeb heev thaum xaiv cov qhab nia ntawm HEC rau ib daim ntawv thov tshwj xeeb.
Hauv cov kws kho mob, cov tshuaj hydroxyethylcellulose feem ntau siv los ua cov tshuaj lom tuab hauv cov ntawv sau thiab ncauj lus. Lub viscosity ntawm hec ua kom tiav kev ncua kev ncua ntawm cov hais thiab muab qhov yuav tsum tau sib xws rau kev muab tshuaj ntxiv. Tsis tas li ntawd, tus cwj pwm shear-thev ntawm HEC tuaj yeem txhim kho kev sib tw ntawm cov ntsiab lus ntawm cov ncauj lus.
Hauv kev lag luam tshuaj pleev ib ce, hydroxyethylcellulose yog siv nyob rau hauv ntau cov khoom lag luam, suav nrog tshuaj zawv plaub hau, tshuaj pleev thiab cream. Nws viscosity-kho cov khoom pab tau txhim kho kev ruaj khov thiab kev ntxhib los mos ntawm cov qauv siv tag nrho.
Hauv kev tsim kho kev tsim kho, hydroxyethylcellulose feem ntau siv los ua cov tuab hauv cov khoom noj khoom haus caent-raws li cov. Lub viscosity ntawm hec pab tswj qhov kev ntws thiab kev ua tiav ntawm cov khoom siv thaum lub sijhawm ntawv thov. Qhov no yog qhov tshwj xeeb tshaj yog rau cov ntawv thov xws li pobzeb cov nplaum thiab grouts.
Lub viscosity ntawm hydroxyethyl cellulose yog qhov tseem ceeb hauv kev ua tau cuam tshuam nws qhov kev ua tau zoo hauv cov ntawv thov sib txawv. Nkag siab txog cov xwm txheej uas cuam tshuam rau viscosity, kub, thiab shear tus nqi, yog qhov tseem ceeb rau kev siv HEC hauv ntau yam kev lag luam. Raws li ib qho kev sib zog polymer, hydroxyethyl cellule txuas ntxiv mus ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo ntawm ntau yam khoom lag luam sib txawv.
Lub Sijhawm Post: Jan-25-2024