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.
Hydroxyethyl cellulose yog siv dav hauv kev lag luam txheej, cia peb saib seb nws ua haujlwm li cas hauv cov txheej txheem:
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.
Txij li qhov chaw kho hydroxyethyl cellulose yog cov hmoov nplej lossis fiber ntau, cov ntsiab lus hauv qab no yuav tsum tau ua raws li thaum npaj hydroxyethyl cellulose niam cawv:
(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 sieved rau hauv lub tank sib tov, thiab tsis txhob muab ib tug loj npaum li cas los yog ncaj qha muab hydroxyethyl cellulose rau hauv lub tank tov.
(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. Nce pH tom qab ntub dej pab kom yaj.
(5) Raws li qhov ua tau, ntxiv cov tshuaj tua kab mob 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: Nov-21-2022