Methyl hydroxyethyl cellulose (MHEC)yog ib qho tseem ceeb uas tsis yog ionic, yaj tau hauv dej cellulose ether uas siv dav hauv kev lag luam coatings, tshwj xeeb tshaj yog hauv cov txheej txheem coatings dej. Nws cov thickening, water retention, rheological control, thiab film-forming synergistic effects yog qhov tseem ceeb tshaj plaws. Nrog rau kev cai lij choj ib puag ncig nruj dua thiab kev loj hlob sai ntawm kev lag luam coatings dej, MHEC tau dhau los ua ib qho ntawm cov khoom siv tseem ceeb rau kev txhim kho kev ua haujlwm ntawm coatings.
Hais txog qhov tuab, MHEC ua rau cov txheej txheem txheej tuab ntxiv los ntawm kev ua kom nws cov saw hlau polymer o hauv dej thiab tsim cov qauv sib txuas lus. Qhov kev tuab no qhia txog cov yam ntxwv pseudoplastic sib txawv: tswj cov viscosity siab nyob rau hauv cov xwm txheej qis shear kom tiv thaiv cov xim thiab cov khoom sau sedimentation thiab stratification; thiab txo cov viscosity nyob rau hauv cov xwm txheej siab shear, pab txhawb kev txhuam thiab txau. Cov khoom rheological no tso cai rau kev sib npaug zoo ntawm kev ruaj khov cia thiab kev ua haujlwm ntawm daim ntawv thov, txo cov qhov tsis zoo ntawm daim ntawv thov xws li sagging thiab splashing.
MHEC ua lub luag haujlwm tseem ceeb hauv cov txheej txheem tsim zaj duab xis. Txawm hais tias MHEC nws tus kheej tsis yog cov resin tsim zaj duab xis, nws lub peev xwm khaws dej zoo heev ua rau qeeb qeeb ntawm cov dej evaporation, ua rau cov khoom emulsion muaj sijhawm ntau dua los sib xyaw ua ke, yog li tsim cov zaj duab xis txuas ntxiv thiab ntom. Qhov no muaj qhov cuam tshuam zoo rau kev txhim kho qhov tiaj tus, kev nplaum, thiab qhov tsos ntawm cov zaj duab xis txheej, tshwj xeeb tshaj yog thaum siv rau hauv qhov kub siab lossis qhuav, qhov twg cov nyhuv ntawm MHEC yog qhov pom tseeb dua.
MHEC kuj tseem txhim kho qhov ruaj khov ntawm cov txheej txheem txheej. Cov pab pawg hydrophilic hauv nws cov qauv molecular pab kom sib npaug cov xim thiab cov khoom sau, txo cov flocculation thiab kev sib cais xim, yog li txhim kho qhov sib xws ntawm cov xim thiab lub zog zais ntawm cov zaj duab xis txheej. Tib lub sijhawm, MHEC yog cov khoom tsis-ionic, tsis hnov mob rau kev hloov pauv pH, thiab muaj kev sib raug zoo nrog ntau yam emulsions thiab additives, ua rau nws siv tau dav.
Los ntawm kev xav txog ib puag ncig thiab kev nyab xeeb,MHECyog los ntawm cov cellulose ntuj thiab muaj qhov zoo ntawm tsw qab tsawg, VOC qis, thiab tsis muaj tshuaj lom, ua raws li kev coj ua tam sim no ntawm cov txheej xim ntsuab. Los ntawm kev xaiv cov khoom MHEC nrog cov qib viscosity sib txawv thiab qib ntawm kev hloov pauv, cov qauv tuaj yeem ua kom zoo dua rau cov xim pleev xim sab hauv, cov txheej sab nraud, thiab cov txheej dej ua haujlwm. Hauv kev lag luam txheej, MHEC tsis yog tsuas yog tus neeg sawv cev ua kom tuab zoo xwb tab sis kuj yog cov khoom ntxiv tseem ceeb uas cuam tshuam rau qhov zoo ntawm cov zaj duab xis thiab kev ua tau zoo tag nrho. Nws qhov txiaj ntsig zoo hauv kev txhim kho kev ua haujlwm, txhim kho qhov tsos ntawm txheej, thiab nce kev ruaj khov ua rau nws yog qhov tseem ceeb hauv cov qauv txheej dej niaj hnub.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-15-2025