Hydroxyethyl cellulose (HEC) yog siv cov polymer hauv ntau yam kev lag luam vim nws cov khoom lag luam xws li thickening, dej tuav, thiab zaj duab xis tsim lub peev xwm. Dispersing HEC kom zoo yog qhov tseem ceeb los xyuas kom nws siv tau zoo hauv cov ntawv thov, tshuaj pleev ib ce, thiab cov khoom siv.
1. Nkag siab hydroxyethyl cellulose (HEC):
HEC yog tsis-ionic, dej-soluble polymer muab tau los ntawm cellulose.
Nws cov kev daws teeb meem kom pom hauv dej, ua kom pom tseeb tus cwj pwm pseudopastic tus cwj pwm, txhais tau hais tias nws viscosity txo qis nrog nce shear tus nqi.
2. Xaiv cov kuab tshuaj:
Dej yog cov huab daws feem ntau rau dispersing Hec vim nws lub siab solubility.
Qhov kub thiab txias thiab pH ntawm cov kuab tshuaj tuaj yeem cuam tshuam qhov tawg ntawm HEC. Feem ntau, nruab nrab kom me ntsis alkaline pH yog qhov xav tau.
3. Npaj cov khoom nruab nrab:
Siv cov dej uas muaj kev phom sij lossis distilled kom txo cov impurities uas yuav cuam tshuam rau hec dispersion.
Tswj qhov xav tau qhov xav tau rau cov txheej txheem uas xav tau rau cov txheej txheem sib cais, feem ntau yog chav sov kom sov me me (nyob ib ncig ntawm 20-40 ° C).
4. Kev Ua Haujlwm Txheej Txheem:
a. Tes Sib xyaw:
- Haum rau cov ntawv thov me me.
- Maj mam ntxiv hec hmoov rau cov kuab tshuaj thaum lub taub hau tsis tu ncua los tiv thaiv clumping.
- Xyuas kom meej plhaw plug ntawm cov hmoov ua ntej nce kev sib xyaw sib xyaw.
b. Neeg kho tshuab stirring:
- Siv ib lub tshuab stirrer nruab nrog cov hniav uas haum lossis cuam tshuam.
- Kho kom haum rau kev nrawm kom ua tiav cov kev sib cais tsis zoo uas tsis ua npuas ncauj lossis ua npuas dej ntau dhau.
c. High-shear sib xyaw:
- Ua haujlwm siab High-shear mixers zoo li homogenizers lossis qib siab-ceev dispersers rau kev ua kom muaj kev tawg.
- Tswj cov shear tus nqi kom tiv thaiv kev tsis txhob muaj kev cuam tshuam ntawm HEC lwg.
d. Ultrasonication:
- Siv lub zog ultrasonic kom tawg cia agglomerates thiab txhim kho dispersion.
- Txhim kho cov sonication ua kom zoo nkauj (zaus, lub zog, ntev) kom tsis txhob muaj kev daws teeb meem.
5. Cov lus qhia rau kev ua tiav dispersion:
Xyuas kom meej HEC hmoov tau ntxiv maj los tiv thaiv cov pob tsim.
Zam kev hloov chaw kub lossis txias hauv qhov kub los yog phov thaum lub sijhawm dispersion, raws li lawv tuaj yeem cuam tshuam rau hac solubility.
Tso cai rau lub sijhawm txaus rau cov dej ua tiav thiab dispersion ntawm hec hais.
Saib xyuas viscosity thaum lub sij hawm dispersion kom ua tiav qhov xav tau.
Siv cov cuab yeej tsim nyog thiab cov tswv yim raws li cov nplai thiab cov kev xav tau ntawm daim ntawv thov.
6. Tswjhwm Zoo:
Kev tshuaj xyuas rau cov khoom tsis muaj txiaj ntsig lossis cov qauv gel zoo li.
Ntsuas viscosity siv viscieteter kom pom tseeb kev sib xws nrog cov lus qhia tshwj xeeb.
Kev kuaj mob rheological los ntsuas kev coj tus cwj pwm txaus thiab kev ruaj khov ntawm hec dispersion.
7. Cia thiab tuav:
KHW HEC DECIPICH sib faib hauv cov thawv ntim kom nruj kom tiv thaiv kom tsis txhob muaj kev paug thiab noo noo.
Zam kev ntev ntev los ntawm huab cua sov lossis lub hnub ncaj qha, uas tuaj yeem txwv cov polymer.
Daim ntawv lo cov thawv nrog cov ntaub ntawv cuam tshuam suav nrog tus lej batch suav nrog, kev xav tau, thiab cov chaw cia khoom.
8. Kev txiav txim siab ruaj ntseg:
Ua raws li cov lus qhia kev nyab xeeb thaum kov hec hmoov thiab cov kev daws teeb meem.
Siv cov khoom tiv thaiv tus kheej tsim nyog (PPE) xws li hnab looj tes thiab kev tiv thaiv kev nyab xeeb.
Zam kev nqus plua plav ntawm cov plua av plua av los ntawm kev ua haujlwm hauv qhov chaw muaj pa tau zoo lossis siv kev tiv thaiv kev ua pa yog tias tsim nyog.
Dispersing hydroxyethyl cellulose zoo kom pom zoo ntawm kev xaiv cov kuab tshuaj, kev ntsuas kev ntsuas zoo, thiab kev nyab xeeb tswj hwm kev nyab xeeb. Los ntawm cov lus qhia no, koj tuaj yeem ua kom ntseeg tau qhov kev ua tau zoo thiab ruaj khov ntawm HEC Dispersions hauv ntau cov ntawv thov.
Lub Sijhawm Post: Feb-18-2025