Hydroxyethyl cellulose

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. 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. Hydroxyethyl cellulose tsis ruaj khov ntawm qhov kub thiab txias, zam cov av noo, cua sov, thiab kub kub, thiab muaj cov ntsev solubility zoo heev rau dielectrics. Nws cov tshuaj aqueous tau tso cai kom muaj cov ntsev ntau ntawm cov ntsev thiab ruaj khov.

Cov lus qhia
Koom ncaj qha rau hauv kev tsim khoom

1. Ntxiv dej huv rau hauv lub thoob loj uas muaj lub tshuab ua haujlwm siab.

2. Pib nplawm tsis tu ncua ntawm qhov ceev thiab maj mam sieve cov hydroxyethyl cellulose rau hauv cov tshuaj sib npaug.

3. Txuas ntxiv stirring kom txog thaum tag nrho cov khoom yog soaked los ntawm.

4. Tom qab ntawd ntxiv cov tshuaj tua kab mob, alkaline additives xws li pigments, dispersing aids, dej ammonia.

5. Sib tov kom txog thaum tag nrho cov hydroxyethyl cellulose yog yaj tag (lub viscosity ntawm cov tshuaj nce ntau heev) ua ntej ntxiv lwm yam nyob rau hauv cov mis, thiab grind kom txog thaum cov khoom tiav.

Nruab nrog niam cawv

Txoj kev no yog thawj zaug npaj cov cawv niam nrog ntau dua concentration, thiab tom qab ntawd ntxiv rau cov xim latex. Qhov kom zoo dua ntawm txoj kev no yog tias nws muaj qhov yooj yim dua thiab tuaj yeem ncaj qha ntxiv rau cov xim tiav, tab sis nws yuav tsum khaws cia kom zoo. Cov kauj ruam zoo ib yam li cov kauj ruam 1-4 hauv txoj kev 1, tshwj tsis yog tias kev nplawm siab tsis tas yuav kom yaj tag rau hauv cov kua nplaum.

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 stirred tsis tu ncua kom txog thaum cov tshuaj yog pob tshab thiab meej.

2. Nws yuav tsum tau sieved rau hauv lub thawv sib tov maj mam. Tsis txhob ncaj qha ntxiv cov hydroxyethyl cellulose uas tau tsim rau hauv cov pob lossis cov pob rau hauv cov khoom sib xyaw hauv cov khoom loj lossis ncaj qha.

3. 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.

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 rau kev khiav lag luam. 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.