Hydroxyethyl Cellulose (HEC) yog ib qho uas tsis yog-ionic dej-soluble polymer dav siv nyob rau hauv coatings, tshuaj pleev ib ce, detergents thiab tsev cov ntaub ntawv. Vim nws cov thickening zoo, stabilizing thiab film-forming zog, nws yuav tsum tau yaj nyob rau hauv dej los tsim ib tug uniform kua thaum siv.
1. Kev npaj ua tiav
Yuav tsum muaj cov cuab yeej thiab cov khoom siv
Hydroxyethyl cellulose hmoov
Dej huv los yog dej deionized
Cov khoom siv stirring (xws li stirring rods, hluav taws xob stirrers)
Ntim (xws li iav, thoob yas)
Cov kev ceev faj
Siv dej huv los yog dej deionized kom tsis txhob muaj impurities cuam tshuam rau cov nyhuv dissolution.
Hydroxyethyl cellulose yog rhiab heev rau qhov kub thiab txias, thiab cov dej kub tuaj yeem hloov kho raws li qhov xav tau thaum lub sijhawm tawg (dej txias lossis dej sov txoj kev).
2. Ob txoj kev sib cais feem ntau siv
(1) Txoj kev dej txias
Maj mam txhuam cov hmoov: Hauv ib lub thawv ntim nrog dej txias, maj mam thiab sib npaug ntawm HEC hmoov rau hauv dej kom tsis txhob ntxiv cov hmoov ntau dhau rau ib zaug kom ua rau lub ncuav.
stirring thiab dispersing: Siv ib tug stirrer do ntawm ib tug tsawg ceev kom disperse cov hmoov nyob rau hauv dej los tsim ib tug ncua kev kawm ntawv. Agglomeration tuaj yeem tshwm sim rau lub sijhawm no, tab sis tsis txhob txhawj.
Sawv ntsug thiab ntub dej: Cia cov dispersion sawv ntsug rau 0.5-2 teev kom cov hmoov nqus dej kom huv thiab o.
Ntxiv stirring: Do kom txog thaum cov tshuaj yog pob tshab kiag li los yog tsis muaj granular xav, uas feem ntau yuav siv sij hawm 20-40 feeb.
(2) Cov txheej txheem dej sov (cov dej kub ua ntej dispersion method)
Pre-dispersion: Ntxiv me me ntawmHEChmoov rau 50-60 ℃ dej kub thiab do sai sai rau disperse nws. Ceev faj kom tsis txhob muaj hmoov agglomeration.
Cov dej txias dilution: Tom qab cov hmoov pib tawg, ntxiv dej txias kom dilute mus rau lub hom phiaj concentration thiab do tib lub sij hawm kom nrawm nrawm.
Txias thiab sawv ntsug: Tos kom txias thiab sawv ntsug ntev kom tso HEC kom yaj tag.
3. Cov txheej txheem tseem ceeb tawg
Tsis txhob agglomeration: Thaum ntxiv HEC, nphoo nws maj mam thiab ua kom nplawm. Yog tias pom muaj agglomeration, siv lub sieve kom tawg cov hmoov.
Kev tswj qhov kub thiab txias: Cov txheej txheem dej txias yog tsim rau cov kev daws teeb meem uas yuav tsum tau khaws cia rau lub sijhawm ntev, thiab cov txheej txheem dej sov tuaj yeem ua rau lub sijhawm tawg.
Lub sij hawm tawg: Nws tuaj yeem siv tau thaum lub pob tshab tau ua tiav raws li tus qauv, uas feem ntau yuav siv sijhawm 20 feeb mus rau ob peb teev, nyob ntawm qhov tshwj xeeb thiab qhov siab ntawm HEC.
4. Sau ntawv
Kev daws teeb meem: Feem ntau tswj ntawm 0.5% -2%, thiab qhov tshwj xeeb concentration yog kho raws li qhov xav tau tiag tiag.
Cia thiab ruaj khov: HEC cov tshuaj yuav tsum tau muab cia rau hauv lub thawv kaw kom tsis txhob muaj kab mob los yog raug rau qhov kub thiab txias qhov chaw uas cuam tshuam rau nws cov stability.
Los ntawm cov kauj ruam saum toj no,hydroxyethyl cellulosetuaj yeem ua tau zoo yaj hauv dej los tsim ib qho kev daws teeb meem thiab pob tshab, uas tsim nyog rau ntau yam kev thov.
Post lub sij hawm: Nov-20-2024