Hydroxyethyl Cellulose yog dab tsi?
Hydroxyethyl cellulose (HEC), ib tug dawb los yog lub teeb daj, tsis muaj ntxhiab, tsis muaj tshuaj lom fibrous los yog hmoov khoom, npaj los ntawm etherification cov tshuaj tiv thaiv ntawm alkaline cellulose thiab ethylene oxide (los yog chlorohydrin), belongs rau Nonionic soluble cellulose ethers.Txij li HEC muaj cov khoom zoo ntawm thickening, suspending, dispersing, emulsifying, bonding, film-forming, tiv thaiv ya raws thiab muab kev tiv thaiv colloid, nws tau siv dav hauv kev tshawb nrhiav roj, txheej, kev tsim kho, tshuaj, khoom noj, textile, papermaking thiab polymer Polymerization. thiab lwm yam teb.
Yuav ua li cas thaum hydroxyethyl cellulose ntsib cov xim pleev xim dej?
Raws li non-ionic surfactant, hydroxyethyl cellulose muaj cov khoom nram qab no ntxiv rau cov thickening, suspending, binding, floating, film-forming, dispersing, dej tuav thiab muab kev tiv thaiv colloid:
HEC yog soluble nyob rau hauv dej kub los yog dej txias, kub los yog boiling tsis muaj nag lossis daus, yog li ntawd nws muaj ib tug ntau yam ntawm solubility thiab viscosity yam ntxwv, thiab non-thermal gelation;
Lub peev xwm tuav dej yog ob zaug siab dua li ntawm methyl cellulose, thiab nws muaj kev tswj xyuas zoo dua;
Nws yog non-ionic thiab tuaj yeem ua ke nrog ntau yam ntawm lwm cov dej-soluble polymers, surfactants, thiab ntsev.Nws yog ib qho zoo heev colloidal thickener rau high-concentration electrolyte daws;
Piv nrog rau kev lees paub methyl cellulose thiab hydroxypropyl methyl cellulose, lub peev xwm dispersing ntawm HEC yog qhov phem tshaj, tab sis muaj peev xwm tiv thaiv colloid yog qhov muaj zog tshaj.
Yuav siv hydroxyethyl cellulose li cas?Yuav ua li cas ntxiv?
1. Ntxiv ncaj qha rau hauv ntau lawm
Txoj kev no yog qhov yooj yim tshaj plaws thiab siv sijhawm luv tshaj plaws.
Ntxiv dej huv mus rau ib lub thoob loj uas muaj lub siab shear tov.Pib do tsis tu ncua ntawm qis ceev thiab maj mam sieve cov hydroxyethyl cellulose rau hauv cov tshuaj sib npaug.Txuas ntxiv mus kom txog thaum tag nrho cov khoom yog soaked.Tom qab ntawd ntxiv preservatives thiab ntau yam additives.Xws li cov pigments, dispersing aids, dej ammonia, thiab lwm yam. Do kom txog thaum tag nrho cov hydroxyethyl cellulose yog yaj tag (lub viscosity ntawm cov tshuaj no tsub kom ntau) ua ntej ntxiv lwm yam nyob rau hauv cov mis rau cov tshuaj tiv thaiv.
2. Nruab nrog niam cawv tos
Nws yog los npaj cov cawv niam nrog ntau dua concentration ua ntej, thiab tom qab ntawd ntxiv rau cov khoom.Qhov kom zoo dua ntawm txoj kev no yog tias nws muaj qhov yooj yim dua thiab tuaj yeem ncaj qha ntxiv rau cov khoom tiav, tab sis nws yuav tsum tau khaws cia kom zoo.Cov kauj ruam ntawm txoj kev no zoo ib yam li feem ntau ntawm cov kauj ruam hauv txoj kev 1;qhov txawv yog tias tsis tas yuav muaj lub siab-shear agitator, thiab tsuas yog qee cov agitators uas muaj lub zog txaus los ua kom cov hydroxyethyl cellulose tsis sib haum xeeb hauv cov tshuaj tuaj yeem txuas ntxiv yam tsis tau nres do kom txog thaum yaj tag rau hauv cov kua nplaum.Txawm li cas los xij, nws yuav tsum raug sau tseg tias cov tshuaj tua kab mob yuav tsum tau ntxiv rau niam cawv sai li sai tau.
Cov lus qhia zoo
Txij li qhov chaw kho hydroxyethyl cellulose yog cov hmoov los yog fiber ntau, thaum npaj hydroxyethyl cellulose niam cawv, nco ntsoov koj ua tib zoo mloog cov ntsiab lus hauv qab no:
(1) Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau nplawm tsis tu ncua kom txog thaum cov tshuaj yog pob tshab thiab meej.
(2) Nws yuav tsum tau maj mam sifted rau hauv lub tank sib tov, thiab tsis txhob nchuav hydroxyethyl cellulose rau hauv lub tank sib tov ntau los yog ncaj qha mus rau hauv pob thiab pob.
(3) Cov dej kub thiab PH tus nqi hauv dej muaj kev sib raug zoo nrog kev sib cais ntawm hydroxyethyl cellulose, yog li yuav tsum tau them nyiaj tshwj xeeb.
(4) Tsis txhob ntxiv qee cov tshuaj alkaline rau qhov sib tov ua ntej cov hmoov hydroxyethyl cellulose yog soaked nrog dej.Kev nce cov pH tom qab soaking yuav pab kom tawg.
(5) Ntxiv cov tshuaj tua kab mob kom ntau li ntau tau ua ntej.
(6) Thaum siv high-viscosity hydroxyethyl cellulose, qhov concentration ntawm niam cawv yuav tsum tsis txhob siab tshaj 2.5-3% (los ntawm qhov hnyav), txwv tsis pub leej niam cawv yuav nyuaj.
Post lub sij hawm: Mar-21-2023