Hydroxyethyl cellulose yog dab tsi?

Hydroxyethyl cellulose yog dab tsi?

Hydroxyethyl cellulose (HEC), ib qho dawb los yog daj ntseg daj, tsis muaj ntxhiab, tsis muaj tshuaj lom fibrous lossis powdery khoom, npaj los ntawm etherification ntawm alkaline cellulose thiab ethylene oxide (los yog chlorohydrin), uas yog cov genus Nonionic soluble cellulose ethers. Vim tias HEC muaj cov khoom zoo xws li thickening, suspending, dispersing, emulsifying, bonding, zaj duab xis-forming, tiv thaiv noo noo thiab muab cov colloids tiv thaiv, nws tau siv dav hauv kev tshawb nrhiav roj, coatings, kev tsim kho, tshuaj thiab zaub mov, textiles, papermaking thiab polymers. Polymerization thiab lwm yam teb.

Hydroxyethyl cellulose siv dav hauv kev lag luam pleev xim. Cia peb saib seb nws ua haujlwm li cas hauv cov xim pleev xim:

Yuav ua li cas thaum hydroxyethyl cellulose ntsib cov txheej txheem dej?

Ua ib qho surfactant non-ionic, hydroxyethyl cellulose muaj cov khoom hauv qab no ntxiv rau thickening, suspending, binding, flotation, film-forming, dispersing, water retention thiab providing protective colloids:

HEC yaj tau hauv dej kub lossis dej txias, thiab tsis precipitate ntawm qhov kub siab lossis kub npau, ua rau nws muaj ntau yam solubility thiab viscosity yam ntxwv, nrog rau cov gelling tsis-thermal;

Lub peev xwm khaws dej yog ob npaug ntawm methyl cellulose, thiab nws muaj kev tswj hwm dej zoo dua;

Cov tshuaj non-ionic nws tus kheej tuaj yeem nyob ua ke nrog ntau yam polymers, surfactants, thiab ntsev uas yaj hauv dej, thiab yog ib qho khoom siv colloidal thickener zoo heev uas muaj cov kua electrolyte concentration siab;

Piv nrog rau cov methyl cellulose thiab hydroxypropyl methyl cellulose uas tau lees paub, lub peev xwm dispersing ntawmHECyog qhov phem tshaj plaws, tab sis lub peev xwm tiv thaiv colloid yog qhov muaj zog tshaj plaws.

Vim tias hydroxyethyl cellulose uas kho saum npoo yog cov hmoov lossis cov khoom fibrous, Shandong Heda ceeb toom koj kom them sai sai rau cov ntsiab lus hauv qab no thaum npaj hydroxyethyl cellulose niam cawv:

(1) Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau do kom txog thaum cov tshuaj no pob tshab thiab meej.

(2) Nws yuav tsum tau maj mam sieve rau hauv lub thoob sib tov, thiab tsis txhob txuas ncaj qha rau hydroxyethyl cellulose thiab hydroxyethyl cellulose rau hauv lub thoob sib tov hauv ntau lossis hauv daim ntawv ntawm cov pob thiab pob.

(3) Qhov kub ntawm dej thiab tus nqi pH ntawm dej muaj kev sib raug zoo rau kev yaj ntawm hydroxyethyl cellulose, yog li yuav tsum tau them sai sai rau nws.

(4) Tsis txhob ntxiv qee yam alkaline rau hauv qhov sib tov ua ntej cov hmoov hydroxyethyl cellulose raug ntub dej. Kev tsa pH tsuas yog tom qab ntub dej yuav pab kom yaj.

(5) Ntxiv cov tshuaj tua kab mob ua ntej kom ntau li ntau tau.

(6) Thaum siv cov hydroxyethyl cellulose uas muaj viscosity siab, qhov concentration ntawm cov dej cawv niam yuav tsum tsis txhob siab tshaj 2.5-3% (los ntawm qhov hnyav), txwv tsis pub cov dej cawv niam nyuaj rau kev tuav.