Hydroxyethyl cellulose (HEC), ib qho dawb los yog daj 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 ntawm 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.
Tom qab hydroxyethyl cellulose ntsib cov xim pleev xim 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;
Piv nrog rau cov methyl cellulose thiab hydroxypropyl methyl cellulose uas tau lees paub, lub peev xwm ntawm HEC dispersing yog qhov phem tshaj plaws, tab sis lub peev xwm tiv thaiv colloid yog qhov muaj zog tshaj plaws;
Nws yog non-ionic thiab tuaj yeem nyob ua ke nrog ntau yam polymers, surfactants, thiab ntsev uas yaj hauv dej. Nws yog ib qho khoom siv colloidal thickener zoo heev rau cov kua electrolyte uas muaj concentration siab.
Yuav siv hydroxyethyl cellulose li cas?
Ntxiv ncaj qha thaum lub sijhawm tsim khoom - txoj kev no yog qhov yooj yim tshaj plaws thiab siv sijhawm tsawg dua:
Pib do tas li ntawm qhov ceev qis thiab maj mam lim cov hydroxyethyl cellulose kom sib npaug rau hauv cov tshuaj thiab txuas ntxiv do kom txog thaum txhua cov khoom me me raug ntub tag. Tom qab ntawd ntxiv cov tshuaj preservatives thiab ntau yam khoom ntxiv. Xws li cov xim, cov khoom pab dispersing, ammonia, thiab lwm yam. Do kom txog thaum tag nrho cov hydroxyethyl cellulose yaj tag (qhov viscosity ntawm cov tshuaj nce ntxiv ntau) ua ntej ntxiv lwm yam khoom hauv cov mis kom ua tiav qhov kev sib xyaw.
Nruab nrog niam dej cawv
Nws yog los npaj cov dej cawv niam nrog qhov concentration siab dua ua ntej, thiab tom qab ntawd ntxiv rau cov khoom. Qhov zoo ntawm txoj kev no yog tias nws muaj kev ywj pheej ntau dua thiab tuaj yeem ntxiv ncaj qha 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 tshuab ua kom siab, thiab tsuas yog qee lub tshuab ua kom muaj zog txaus los khaws cov hydroxyethyl cellulose sib npaug hauv cov tshuaj tuaj yeem siv, thiab txuas ntxiv mus do kom txog thaum yaj tag rau hauv cov tshuaj viscous. Txawm li cas los xij, nws yuav tsum tau sau tseg tias tus neeg sawv cev antifungal yuav tsum tau ntxiv rau cov dej cawv niam sai li sai tau.
Cov lus qhia zoo:
Vim tias hydroxyethyl cellulose uas kho saum npoo yog cov hmoov lossis cov khoom fibrous, thaum npaj hydroxyethyl cellulose niam dej cawv, nco ntsoov them sai sai rau cov ntsiab lus hauv qab no:
Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau do kom txog thaum cov tshuaj no pob tshab thiab meej;
Nws yuav tsum tau lim rau hauv lub thoob sib tov qeeb qeeb, thiab tsis txhob txuas ncaj qha cov lumps lossis spheroids thiab hydroxyethyl cellulose rau hauv lub thoob sib tov;
Qhov kub ntawm dej thiab tus nqi pH ntawm dej muaj kev sib raug zoo nrog kev yaj ntawm hydroxyethyl cellulose, yog li yuav tsum tau saib xyuas tshwj xeeb rau nws;
Tsis txhob ntxiv qee cov tshuaj alkaline rau hauv qhov sib tov ua ntejhydroxyethyl cellulosecov hmoov raug muab dej ntub. Kev tsa tus nqi pH tom qab ntub yuav pab yaj;
Ntxiv cov tshuaj tua kab mob ua ntej kom ntau li ntau tau;
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.
Lub sijhawm tshaj tawm: Plaub Hlis-28-2024