Cov txheej txheem tuab ntawm hydroxyethyl cellulose yog kom nce viscosity los ntawm kev tsim ntawm kev sib tw ntawm kev sib tw thiab cov saw entanglement ntawm molecular chains. Yog li ntawd, cov txheej txheem tuab ntawm cov xov xwm hydroxyethyl cellulose tuaj yeem faib ua ob yam: ib qho yog lub luag haujlwm ntawm kev sib txuam thiab intramolecular hydrogen bonds. Lub Hydrophobic lub ntsiab conin txuam nrog cov neeg nyob ib puag ncig cov lwg me me los ntawm hydrogen bonds, uas txhim kho cov fluidity ntawm polymer nws tus kheej. Qhov ntim ntawm cov nplais ntawm cov nplais txo qhov chaw rau kev txav dawb ntawm cov khoom siv, yog li nce lub viscosity ntawm lub system; Thib ob, los ntawm kev ua haujlwm thiab sib tshooj ntawm cov qauv molecular, cov qauv xov tooj cellulose nyob hauv cov qauv sib tw hauv tag nrho cov kab ke, li kev txhim kho lub viscosity.
Cia saib seb cellulose plays lub luag haujlwm hauv cov dej ruaj khov ntawm cov kab ke tsis pub muaj dej, thiab ua rau kev tiv thaiv dej sib cais; Thib ob, kev sib cuam tshuam ntawm cov hlua khi ntawm ceg tawv nyias muaj nyias qhov sib txawv ntawm cov xim sib tw, cov pulsion thiab emulsion thiab emulsion emulsion, uas txwv tsis pub nyob ruaj ntseg.
Nws yog kev sib xyaw ua ke ntawm ob hom kev txiav txim uas ua rau cov cellulinal hydroxyethyl cellulose kom muaj peev xwm txhim kho kom ruaj khov. Hauv cov xim pleev xim rau looj, cov lus qhia txog kev sib tw tau ua rau muaj kev sib tw ua ke, thiab cov ceg tawv nqaij ua kom puas tsuaj, uas yog qhov yooj yim mus rau ib leeg, lub kaw lus viscosity txo. Txij li thaum lub kaw lus muaj ntau tus nqi ntawm lwm yam (pigments, fillers, qhov kev sib txuas lus txawm tias nws tau muab tso rau lub sijhawm ntev tom qab cov xim sib xyaw. Hauv qhov no, hac tsuas yog tso siab rau hydrogen bonds. Cov nyhuv ntawm cov dej tuav cia thiab thickening txo cov thicking ua haujlwm ntawm HEC, thiab kev pab nyiaj ntawm qhov kev sib cais ntawm lub kaw lus kuj tseem raug txo kom haum. Txawm li cas los xij, qhov HEC uas tau yaj tau ua tiav hauv cov kab ke ntawm qhov qis dua stirring ceev thaum lub sij hawm sib txuas ntawm HEC cov saw hlau tsis tshua muaj kev puas ntsoog. Yog li qhia tau cov tuab dua ua kom tuab thiab tso tseg. Pom tseeb, kev ua ib txhij ntawm ob txoj kev thickening yog qhov ua ntej ntawm cov tuab tuab ntawm cellulose thiab ua kom ruaj khov cia. Hauv lwm lo lus, tus yaj thiab dispersed lub xeev ntawm cellulose hauv cov dej yuav cuam tshuam rau nws cov nyhuv tuab thiab ua kom muaj kev ruaj khov.
Lub sij hawm ncua: Nov-02-2022