Hydroxyethyl cellulose yog qib viscosity nruab nrab mus rau siab ntawm cellulose ether, siv ua cov khoom tuab thiab stabilizer rau cov txheej txheem dej, tshwj xeeb tshaj yog thaum qhov viscosity cia siab thiab qhov viscosity daim ntawv thov qis. Cellulose ether yooj yim tawg hauv dej txias nrog pH tus nqi ≤ 7, tab sis nws yooj yim rau agglomerate hauv alkaline kua nrog pH tus nqi ≥ 7.5, yog li peb yuav tsum tau them sai sai rau qhov dispersibility ntawm cellulose ether.
Cov yam ntxwv thiab kev siv ntawm hydroxyethyl cellulose:
1. Cov tshuaj ua kom dej tsis muaj zog tiv thaiv enzyme, uas siv tau rau ntau yam pH (PH = 2-12).
2. Yooj yim rau disperse, nws tuaj yeem ntxiv ncaj qha rau hauv daim ntawv ntawm cov hmoov qhuav lossis hauv daim ntawv ntawm slurry thaum sib tsoo pigments thiab fillers.
3. Kev tsim kho zoo heev. Nws muaj qhov zoo ntawm kev txuag zog, tsis yooj yim rau dej ntws thiab dai, thiab tiv taus dej txaws zoo.
4. Zoo sib xws nrog ntau yam surfactants thiab preservatives siv rau hauv cov xim latex.
5. Qhov viscosity cia yog ruaj khov, uas tuaj yeem tiv thaiv qhov viscosity ntawm cov xim latex los ntawm kev txo qis vim yog qhov kev rhuav tshem ntawm cov enzymes hauv hydroxyethyl cellulose dav dav.
Cov Khoom ntawm Hydroxyethyl Cellulose
Hydroxyethyl cellulose ether yog ib qho polymer uas tsis yaj hauv dej. Nws yog ib qho hmoov dawb lossis daj daj uas ntws tau yooj yim. Feem ntau tsis yaj hauv feem ntau cov kuab tshuaj organic.
1. HEC yaj tau hauv dej kub lossis dej txias, thiab tsis ua rau kub dhau lossis npau, uas ua rau nws muaj ntau yam solubility thiab viscosity yam ntxwv, thiab tsis yog thermal gelation.
2. Nws yog non-ionic thiab tuaj yeem nyob ua ke nrog lwm cov polymers uas yaj hauv dej, surfactants, thiab ntsev. Nws yog ib qho khoom siv colloidal thickener zoo heev rau cov kua uas muaj cov electrolytes siab.
3. Lub peev xwm khaws dej tau ob npaug ntawm methyl cellulose, thiab nws muaj kev tswj hwm dej zoo dua.
4. Piv nrog rau cov methyl cellulose thiab hydroxypropyl methyl cellulose uas tau lees paub, lub peev xwm ntawm HEC yog qhov phem tshaj plaws, tab sis lub peev xwm tiv thaiv colloid yog qhov muaj zog tshaj plaws (muaj yeeb yuj).
Ua kom tuab
Cuam tshuam rau kev ua haujlwm tau zoo, xws li: kev tiv thaiv txheej, kev tiv thaiv dej txaws, kev tiv thaiv kev poob; cov qauv tshwj xeeb ntawm cellulose ether tuaj yeem ua kom cov hmoov ruaj khov hauv lub kaw lus txheej, qeeb nws qhov kev sib haum xeeb, thiab ua rau lub kaw lus tau txais cov txiaj ntsig zoo dua.
Kev tiv thaiv dej zoo
Tom qab cov xim pleev xim qhuav tag, nws muaj kev tiv thaiv dej zoo heev. Qhov no qhia txog qhov tseem ceeb ntawm nws txoj kev tiv thaiv dej hauv cov txheej txheem tsim cov khoom siv PVC siab. Los ntawm cov qauv txawv teb chaws mus rau Suav teb, hauv cov txheej txheem PVC siab no, qhov ntau ntawm cellulose ether ntxiv yog 4-6‰.
kev khaws cia dej zoo heev
Hydroxyethyl cellulose tuaj yeem ua kom lub sijhawm ntev dua thiab tswj lub sijhawm ziab kom tau txais cov yeeb yaj kiab zoo dua; ntawm lawv, qhov kev khaws cia dej ntawm methyl cellulose thiab hypromellose poob qis dua 40 ° C, thiab qee qhov kev tshawb fawb txawv teb chaws ntseeg tias nws tuaj yeem txo qis los ntawm 50%, qhov tshwm sim ntawm cov teeb meem hauv lub caij ntuj sov thiab kub siab tau nce ntau heev.
Kev ruaj khov zoo kom txo cov xim sib xyaw ua ke
Tshem tawm cov av noo, syneresis thiab flocculation; lub sijhawm no, hydroxyethyl cellulose ether yog hom khoom tsis-ionic. Tsis cuam tshuam nrog ntau yam khoom ntxiv hauv lub cev.
Kev sib raug zoo nrog ntau lub xim system
Kev sib raug zoo heev ntawm cov xim, cov xim thiab cov khoom sau; hydroxyethyl cellulose ether muaj qhov zoo tshaj plaws xim kev loj hlob, tab sis tom qab kev hloov kho, xws li methyl thiab ethyl, yuav muaj kev phom sij zais ntawm kev sib raug zoo ntawm cov xim.
Kev sib raug zoo nrog ntau yam khoom siv raw
Nws siv tau rau ntau yam txheej txheem tsim cov txheej txheem.
Kev ua haujlwm tiv thaiv kab mob siab
Haum rau cov kab ke silicate
Lub sijhawm tshaj tawm: Lub Ob Hlis-02-2023