Hydroxyethyl cellulose (HEC) yog dawb los yog lub teeb daj, tsis muaj ntxhiab, tsis muaj tshuaj lom fiber ntau los yog hmoov hmoov npaj los ntawm etherification ntawm alkaline cellulose thiab ethylene oxide (los yog chlorohydrin).Nonionic soluble cellulose ethers.Ntxiv rau qhov thickening, suspending, binding, flotation, film-forming, dispersing, water-retaining thiab muab kev tiv thaiv colloids, nws muaj cov khoom nram qab no:
1. HEC yog soluble nyob rau hauv dej kub los yog txias, thiab tsis precipitate ntawm kub los yog boiling, kom nws muaj ib tug ntau yam ntawm solubility thiab viscosity yam ntxwv, thiab tsis-thermal gelation;
2. Cov uas tsis yog-ionic nws tus kheej tuaj yeem ua ke nrog ntau yam ntawm lwm cov dej-soluble polymers, surfactants thiab ntsev, thiab yog ib qho zoo heev colloidal thickener uas muaj high-concentration electrolyte daws;
3. Lub peev xwm tuav dej yog ob zaug siab dua li ntawm methyl cellulose, thiab nws muaj kev tswj xyuas zoo dua.
4. Piv nrog rau kev lees paub ntawm methyl cellulose thiab hydroxypropyl methyl cellulose, lub peev xwm dispersing ntawm HEC yog qhov phem tshaj plaws, tab sis kev tiv thaiv colloid muaj peev xwm muaj zog tshaj plaws.Vim 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 txheej, kev tsim kho, tshuaj thiab zaub mov, textile, ntawv thiab polymer polymerization. thiab lwm yam teb.
Cov kev ceev faj:
Txij li cov txheej txheem kho hydroxyethyl cellulose yog hmoov lossis cellulose khoom, nws yooj yim los lis thiab yaj hauv dej ntev npaum li cov teeb meem hauv qab no tau sau tseg.
1. Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau nplawm tas li kom txog thaum cov tshuaj yog pob tshab thiab meej.
2. Nws yuav tsum tau sieved mus rau hauv lub mixing chim maj mam, thiab tsis txhob ncaj qha ntxiv hydroxyethyl cellulose uas tau raug tsim nyob rau hauv lumps thiab pob rau hauv lub thawv sib tov.
3. Cov dej kub thiab pH tus nqi ntawm cov dej muaj ib qho kev sib raug zoo nrog kev sib cais ntawm hydroxyethyl cellulose, yog li yuav tsum tau them nyiaj tshwj xeeb rau nws.
4. Tsis txhob ntxiv qee cov tshuaj alkaline rau qhov sib tov ua ntej cov hmoov hydroxyethyl cellulose sov los ntawm dej.Kev nce tus nqi PH tom qab ua kom sov yog pab tau rau kev sib cais.
5. Raws li qhov ua tau, ntxiv cov tshuaj tua kab mob kom ntxov li sai tau.
6. Thaum siv high-viscosity hydroxyethyl cellulose, qhov concentration ntawm niam cawv yuav tsum tsis txhob siab tshaj 2.5-3%, txwv tsis pub niam cawv yuav nyuaj.Tom qab kho hydroxyethyl cellulose feem ntau tsis yooj yim rau cov pob los yog spheres, thiab nws yuav tsis tsim insoluble spherical colloids tom qab ntxiv dej.
Post lub sij hawm: Nov-15-2022