Hydroxyethyl cellulose (HEC), ib qho dawb los yog lub teeb daj, tsis muaj ntxhiab, tsis muaj tshuaj lom fibrous lossis hmoov khoom, npaj los ntawm etherification ntawm alkaline cellulose thiab ethylene oxide (los yog chlorohydrin), uas yog cov genus Noionic soluble cellulose ethers. Vim HEC muaj cov khoom zoo ntawm thickening, suspending, dispersing, emulsifying, bonding, film-forming, tiv thaiv ya raws thiab muab kev tiv thaiv colloids, nws tau siv dav hauv kev tshawb nrhiav roj, txheej, kev tsim kho, tshuaj thiab zaub mov, textiles, papermaking thiab polymers. Polymerization thiab lwm yam.
Tom qab hydroxyethyl cellulose ntsib cov xim dej?
Raws li cov tsis-ionic surfactant, hydroxyethyl cellulose muaj cov khoom nram qab no ntxiv rau cov thickening, suspending, binding, flotation, film-forming, dispersing, dej tuav thiab muab kev tiv thaiv colloids:
HEC yog soluble nyob rau hauv dej kub los yog txias, thiab tsis precipitate ntawm kub los yog boiling, ua rau nws muaj ib tug ntau yam ntawm solubility thiab viscosity yam ntxwv, raws li zoo raws li tsis-thermal gelling;
Lub peev xwm tuav dej yog ob zaug ntawm methyl cellulose, thiab nws muaj kev tswj xyuas zoo dua;
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;
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.
Yuav siv hydroxyethyl cellulose li cas?
Ntxiv ncaj qha rau lub sijhawm tsim khoom - txoj kev no yog qhov yooj yim tshaj plaws thiab siv sijhawm tsawg dua:
Pib stirring tsis tu ncua ntawm qhov tsawg ceev thiab maj mam sieve lub hydroxyethyl cellulose tusyees mus rau hauv cov tshuaj thiab mus txuas ntxiv stirring kom txog thaum tag nrho cov hais yog tsau los ntawm. Tom qab ntawd ntxiv preservatives thiab ntau yam additives. Xws li cov pigments, dispersing aids, ammonia, thiab lwm yam. Do kom txog thaum tag nrho cov hydroxyethyl cellulose yog yaj tag (lub viscosity ntawm cov tshuaj no nce heev) ua ntej ntxiv lwm yam nyob rau hauv cov mis nyuj los ua cov tshuaj tiv thaiv.
Nruab nrog niam cawv
Nws yog los npaj ib tug niam cawv nrog ib tug siab concentration ua ntej, thiab ces 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 sib 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 dispersed nyob rau hauv cov tshuaj yuav siv tau, thiab mus txuas ntxiv mus do kom txog thaum tag nrho yaj mus rau hauv ib tug viscous tov. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias tus neeg sawv cev antifungal yuav tsum tau ntxiv rau niam cawv kom sai li sai tau.
Cov lus qhia zoo:
Txij li qhov chaw kho hydroxyethyl cellulose yog hmoov lossis fibrous khoom, thaum npaj hydroxyethyl cellulose niam cawv, nco ntsoov koj ua tib zoo mloog cov ntsiab lus hauv qab no:
Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau muab stirring kom txog thaum cov tshuaj yog pob tshab thiab meej;
Nws yuav tsum tau sieved mus rau hauv lub mixing chim maj mam, thiab tsis txhob ncaj qha mus txuas lub lumps los yog spheroids thiab hydroxyethyl cellulose mus rau hauv lub mixing chim;
Cov dej kub thiab pH tus nqi ntawm cov dej muaj kev sib raug zoo nrog kev sib cais ntawm hydroxyethyl cellulose, yog li yuav tsum tau them nyiaj tshwj xeeb rau nws;
Tsis txhob ntxiv qee cov tshuaj alkaline rau qhov sib tov ua ntejhydroxyethyl cellulosehmoov yog soaked nrog dej. Nce tus nqi pH tom qab soaking yuav pab yaj;
Raws li qhov ua tau, ntxiv cov tshuaj tua kab mob ua ntej;
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 yog ib qho nyuaj rau lis.
Lub sij hawm xa tuaj: Plaub Hlis-28-2024