Hydroxyethyl cellulose (HEC)yog dej-soluble tsis muaj tseeb cellulose cellulose cellulose, uas tau siv dav siv rau cov khoom siv, ua tshuaj, tshuaj noj txhua hnub thiab lwm thaj teb. Txawm li cas los xij, HEC muaj cov dej ua haujlwm siab thiab tsis muaj zog hydubloilicity, uas tej zaum yuav ua rau kev txwv kev ua haujlwm hauv qee qhov kev thov. Yog li ntawd, hydrophobically hloov hydroxyethyl cellulose (HMIB cellulose (HMHEC) tuaj rau hauv kev ua kom muaj peev xwm ua kom muaj peev xwm txhim kho, muaj peev xwm ua kom muaj zog, emulsening stability thiab dej tsis kam.
1. Qhov tseem ceeb ntawm Hydrophobic hloov kho ntawm hydroxyethyl cellulose
Txhim kho cov khoom thicking thiab rheological khoom
Hydrophobic hloov tau muaj peev xwm txhim kho lub peev xwm thickening ntawm HEC, tshwj xeeb tshaj yog ntawm cov nqi qis shear tsawg. Nws qhia ntau hom viscosity, uas pab txhim kho lub thixotropy thiab pseudoplasticity ntawm cov kab ke. Cov cuab yeej no yog ib qho tseem ceeb tshwj xeeb hauv cov txheej txheej, oilfield drilling cov roj, cov khoom lag luam tus kheej, thiab tuaj yeem txhim kho qhov ruaj khov thiab siv cov nyhuv ntawm cov khoom.
Txhim kho emulsion stability
Txij li thaum hloov kho HEC tuaj yeem tsim cov kev sib raug zoo hauv cov kev daws teeb meem aqueous, nws tuaj yeem txo cov roj-dej sib cais, thiab txhim kho cov txiaj ntsig emulsification. Yog li ntawd, nws muaj cov ntawv thov zoo kawg rau hauv cov liaj teb ntawm cov txheej txheem emulsion, cov khoom tu tawv nqaij thiab cov zaub mov emulsifiers.
Txhim kho cov dej tsis kam thiab ua yeeb yaj kiab-ua yeeb yam
Cov tsoos Hyec yog hydrophilic thiab yooj yim soluble hauv cov av noo ib puag ncig cov khoom tsis kam ntawm cov khoom. Los ntawm hydrophobic hloov kho, nws daim ntawv thov ua cov tshuaj pleev, cov khoom nplaum, cov dej tsis kam ua kom zoo dua qub thiab ua yeeb yaj kiab.
Txhim kho shear thinning cov khoom
Hydrophobic-hloov kho hec tuaj yeem txo cov viscosity nyob rau hauv siab shear tej yam kev mob, thaum tswj hwm lub siab loj, yog li txhim kho kev tsim kho kev tsim kho kev tsim kho. Nws muaj tus nqi tseem ceeb hauv kev lag luam xws li cov roj av thiab cov duab kos duab kos duab.
2. Hydrophobic hloov kho ntawm hydroxyethyl cellulose
HEC HYCOVOBIC Kev hloov kho yog feem ntau ua tiav los ntawm kev qhia txog cov pab pawg hydrophobic kom kho nws cov solubility thiab thickening cov khoom los ntawm kev tsim tshuaj lom neeg lossis kev hloov kho lub cev. Hom kev hloov kho hydrophobic muaj raws li nram no:
Hydrophobic pab pawg Grafting
Qhia alkyl (xws li hexadecyl), aryl (xws li phenyl), sixane lossis fluorinated pawg ntawm kev tshuaj lom neeg zoo los txhim kho nws cov tshuaj lom neeg hydrothobicity. Piv txwv li:
Siv Esterification lossis Erherification cov tshuaj tiv thaiv los ua kom muaj cov saw ntev-saw alkyl, xws li hexadecyl lossis ockyl, los ua ib tus qauv hydrophobic.
Qhia txog cov pab pawg Silicone los ntawm cov thawv sib hloov los txhim kho nws cov dej tsis kam thiab lubricity.
Siv kev hloov kho fluorination kom txhim kho huab cua tiv thaiv thiab hydrophobicity, ua rau nws cov txheej txheej high-kawg lossis cov ntawv thov tshwj xeeb.
Copolymerization lossis Hla-Txuas Hloov Kho
Los ntawm kev qhia cov neeg ua haujlwm (xws li Acrylates) lossis hla-epoxy resins (cov dej tsis kam thiab thickening muaj peev xwm kho dua. Piv txwv li, siv hydrophobically hloov hec nyob rau hauv polymer emulsions tuaj yeem txhim kho kev ruaj ntseg thiab cov nyhuv tuab ntawm cov emulsion.
Kev Hloov Rau Lub Cev
Siv cov adsorption los yog txheej thev naus laus zis, hydrophobic molecules yog coated nyob rau ntawm Hec los ua ib qho hydrophobicity. Qhov qauv no muaj mob hnyav thiab tsim nyog rau kev siv nrog cov dej num muaj tshuaj kom ruaj khov, xws li khoom noj.
Hydrophobic Association kev hloov kho
Los ntawm kev qhia me me ntawm Hydrophobic pawg ntawm Hydrophobic pawg ntawm Hydecule, nws tsim cov koom tes sib sau ua cov tshuaj aqueous, yog li kev txhim kho lub peev xwm tuab. Cov qauv no tau siv dav hauv kev txhim kho cov kev ua tau zoo thickeners thiab yog tsim rau txheej, oilfield chemical thiab lwm thaj teb.
Hydrophobic hloov kho ntawmhydroxyethyl celluloseyog ib qho tseem ceeb txhais tau los txhim kho nws cov ntawv thov kev ua tau zoo, uas tuaj yeem txhim kho nws cov peev xwm ua kom tuab, dej tsis kam thiab rheological cov khoom. Cov qauv kev hloov kho ib txwm muaj xws li hydrophobic pawg grafting, copolymerization kev hloov kho, kho lub cev thiab hydrophobic koom haum hloov kho. Txoj kev xaiv tsim nyog tau hloov kho tuaj yeem ua kom zoo dua ntawm HEC raws li cov ntawv thov ua yeeb yam, yog li ua kom muaj cov khoom lag luam sib txawv, cov tshuaj carfield, thiab tshuaj.
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