Hydroxyethyl cellulose (HEC)yog dej-soluble cellulose cellulose derivative nrog cov thickening zoo, zaj duab xis-ua, moisturizing, thiab emulsifying khoom. Yog li ntawd, nws yog dav siv nyob rau hauv ntau daim teb muaj, tshwj xeeb tshaj yog nws ua ib qho tseem ceeb thiab tseem ceeb lub luag haujlwm hauv looj xim (tseem hu ua cov xim xim looj.
1. Cov khoom yooj yim ntawm hydroxyethyl cellulose
Hydroxyethyl cellulose yog dej-soluble polymer compound cellulose molecules (qhia hydroxyethyl pawg ntawm cellulose molecules). Nws cov yam ntxwv tseem ceeb muaj:
Dej Solubility: HEC tuaj yeem yaj hauv dej los ua cov tshuaj muaj kuab tsis muaj zog, yog li kev txhim kho cov khoom siv hluav taws xob ntawm txheej.
Thickening cov nyhuv: HEC tuaj yeem ua kom cov xim viscosity ntawm cov xim pleev xim, ua cov xim looj kua yas muaj cov khoom zoo.
Adhesion thiab Film-thawj cov khoom: HEC lwg me me muaj qee cov txheej txheej hydrothilicity, uas tuaj yeem txhim kho cov txheej ua kom zoo ntawm cov txheej thiab ua kom zoo dua qub.
Stability: HEC muaj qhov zoo thermal stability thiab tshuaj lom neeg ruaj khov, tuaj yeem ruaj khov thaum tsim khoom thiab tsis tshua muaj kev cuam tshuam.
HEC zoo sagging tsis kam: HEC muaj siab siab sagging tsis kam, uas tuaj yeem txo cov kab mob sagging ntawm cov xim kev tsim kho thiab txhim kho cov nyhuv kev tsim kho.
2. Lub luag haujlwm ntawm hydroxyethyl cellulose hauv looj xim
Cov xim looj kua yas yog cov xim pleev xim dej uas siv cov dej ua cov dej thiab polymer emulsion raws li cov yeeb yaj kiab tseem ceeb. Nws yog ib puag ncig phooj ywg, tsis muaj tshuaj lom, tsis muaj kev txob thiab haum rau sab hauv tsev thiab sab nraum zoov phab ntsa pleev xim. Qhov sib ntxiv ntawm hydroxyethyl cellulose tuaj yeem txhim kho cov kev ua tau zoo ntawm cov xim yas, uas yog qhov tshwj xeeb hauv qab no:
2.1 Thuab nyhuv
Nyob rau hauv looj cov xim xim qauv, HEC feem ntau yog siv los ua tuab. Vim tias cov dej-solubble cov yam ntxwv ntawm HEC, nws tuaj yeem sai sai hauv cov neeg hauv aqueous thiab ua tus qauv network los ntawm kev sib txuam nrog kev sib txuam ntawm cov xim huv. Qhov no tsis tuaj yeem txhim kho kev sib tw ntawm cov xim pleev xim, ua rau nws haum txhuam hniav los ntawm sagging vim muaj viscing tsis tshua muaj thaum lub sij hawm cov txheej txheem pleev xim.
2.2 Txhim kho kev tsim kho ntawm kev ua tau zoo ntawm cov txheej txheem
Tus paMuaj peev xwm kho cov rheological cov yam ntxwv ntawm cov xim yas, txhim kho cov xim tsis kam thiab ua kom cov xim pleev xim rau sab nrauv, thiab tsis muaj qhov tsis txaus siab xws li npuas thiab ntws tawm. Tsis tas li ntawd, HEC tuaj yeem txhim kho lub wettability ntawm cov xim, tso cai rau cov xim looj kua yas kom sai sai npog qhov chaw thaum pleev xim tsis xws los ntawm cov txheej txheem tsis sib xws.
2.3 Txhim kho cov dej khaws cia thiab sijhawm qhib ncua sijhawm
Raws li cov polymer compound nrog muaj peev xwm kav dej muaj zog, HEC tuaj yeem txuas lub sijhawm qhib ntawm cov xim huv. Lub sijhawm qhib yog hais txog lub sijhawm uas cov xim tseem nyob hauv lub xeev pleev xim. Qhov kev sib ntxiv ntawm HEC tuaj yeem ncua qeeb ntawm cov dej evaporation, yog li txuas ntxiv lub sijhawm ua haujlwm ntawm cov xim, tso cai rau cov neeg ua haujlwm tsim kom muaj sijhawm ntau dua rau kev txiav thiab txheej. Qhov no yog qhov tseem ceeb rau daim ntawv thov du, tshwj xeeb tshaj yog thaum pleev xim thaj chaw loj, txhawm rau txheej xim lossis tawv nqaij tsis sib xws.
2.4 Txhim kho cov txheej nplaum thiab dej tsis kam
Hauv looj xim looj tshuaj, HEC tuaj yeem txhim kho cov nplaum ntawm cov xim thiab cov saum npoo ntawm cov txheej txheem kom ntseeg tau yooj yim. Nyob rau tib lub sijhawm, HEC txhim kho cov dej tsis zoo ntawm cov xim dej looj, uas muaj peev xwm tiv thaiv kom tsis txhob muaj kev ua kom muaj kev pab cuam lub neej ntawm cov txheej. Tsis tas li ntawd, lub hydrophilicity thiab adhesion ntawm HEC kom cov xim looj pleev xim kom ua cov txheej zoo ntawm ntau lub substrates.
2.5 Txhim kho kev tiv thaiv kev tsis kam thiab kev sib dhos
Vim tias cov khoom siv tsis yooj yim hauv looj cov xim muaj yooj yim los daws, HEC, raws li ib qho kev ua tsis zoo, tuaj yeem txhim kho cov khoom tiv thaiv kev tiv thaiv ntawm cov xim. Los ntawm nce lub viscosity ntawm txheej, HEC ua rau cov khoom khov kho kom tau dispersed ntau dua rau hauv cov txheej txheem, yog li tswj xyuas qhov ruaj khov ntawm cov khoom ntim thiab siv.
3. Kev thov cov txiaj ntsig zoo ntawm hydroxyethyl cellulose hauv looj cov xim khov
Qhov sib ntxiv ntawm hydroxyethyl cellulose muaj qhov tseem ceeb rau kev tsim khoom thiab siv cov xim looj xwb. Ua ntej tshaj plaws, HEC muaj kev tiv thaiv ib puag ncig ib puag ncig. Nws cov dej solubility thiab tsis-toxicity kom ntseeg tau tias latex xim yuav tsis tso cov xim muaj kev phom sij thaum siv thaum ib txwm muaj cov xim tha xim tshiab. Thib ob, HEC muaj cov khoom siv ua yeeb yaj kiab muaj zog, uas tuaj yeem txhim kho zaj yeeb yaj kiab zoo ntawm latex xim thiab smoother, nrog rau kev ua kom zoo dua qub thiab ua kom muaj kuab paug. Tsis tas li ntawd, HEC tuaj yeem txhim kho fluidity thiab workability ntawm cov xim pleev kua txiv, txo qhov nyuaj ntawm kev tsim kho, thiab txhim kho kev ua haujlwm tau zoo.
Daim ntawv thov ntawmhydroxyethyl celluloseNyob rau hauv looj xim muaj ntau yam zoo thiab tuaj yeem txhim kho lub zog rheological, kev tsim kho cov kev ua tau zoo, cov nplaum thiab cov xim ruaj khov ntawm cov xim. Nrog rau kev txhim kho ib puag ncig ib puag ncig thiab cov xim xim zoo, ua kom muaj qhov tseem ceeb tshaj, tau dhau los ua ib qho ntawm cov xim sib ntxiv hauv niaj hnub no. Yav tom ntej, nrog kev txhim kho thev naus laus zis, kev siv ntawm HEC hauv looj xim yuav nthuav dav ntxiv thiab nws lub peev xwm yuav muaj ntau dua.
Lub Sijhawm Post: Nov-14-2024