Cov xab npum ua kua yog ntau yam thiab siv dav siv tshuaj ntxuav kom muaj nuj nqis rau nws txoj kev yooj yim thiab kev ua tau zoo. Txawm li cas los xij, qee zaum, cov neeg siv yuav xav tau cov tuab tuab rau kev txhim kho kev ua haujlwm thiab kev siv. Hydroxyethylcellulose (HEC) yog ib tug nrov thickening neeg sawv cev siv los ua kom tiav viscosity nyob rau hauv cov kua xab npum formulations.
Kawm txog Hydroxyethyl Cellulose (HEC):
Chemical structure thiab properties:
HEC yog cov dej-soluble polymer muab tau los ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa.
Nws cov qauv tshuaj muaj xws li cov pob txha cellulose nrog cov pab pawg hydroxyethyl, ua rau nws soluble hauv dej thiab sib xws nrog ntau yam formulations.
Thickening mechanism:
HEC thickens cov kua los ntawm kev ua kom cov viscosity los ntawm kev tuav dej thiab cov khoom ua yeeb yaj kiab.
Nws tsim ib qho kev sib txuas ntawm peb sab hauv dej, tsim cov qauv zoo li gel uas txhim kho cov kua dej sib xws.
Compatibility nrog surfactants:
HEC muaj kev sib raug zoo nrog cov surfactants feem ntau siv hauv cov kua xab npum formulations.
Nws ruaj khov nyob rau hauv muaj cov tshuaj sib txawv ua rau nws zoo tagnrho rau cov khoom siv xab npum thickening.
Yam tseem ceeb cuam tshuam rau xab npum thickening:
Daim ntawv qhia xab npum:
Nws yog ib qho tseem ceeb kom nkag siab txog cov khoom xyaw tseem ceeb ntawm cov kua xab npum. Lub xub ntiag ntawm qee yam ions, pH, thiab lwm yam khoom tuaj yeem cuam tshuam rau HEC kev ua haujlwm.
Yuav tsum muaj viscosity:
Lub hom phiaj kom meej meej viscosity yog qhov tseem ceeb rau kev txiav txim siab qhov tsim nyog ntawm HEC los siv.
kub:
Kub thaum lub sij hawm formulation cuam tshuam rau lub dissolution thiab activation ntawm HEC. Tej zaum yuav xav tau kev hloov kho raws li kev ua haujlwm kub.
Incorporating HEC rau hauv cov kua xab npum zaub mov txawv:
Khoom siv thiab khoom siv:
Sau cov khoom xyaw tsim nyog suav nrog kua xab npum, HEC hmoov, dej, thiab lwm yam khoom ntxiv.
Nruab nrog sib tov ntim, stirrer thiab pH meter.
Kev npaj HEC daws:
Ntsuas qhov xav tau ntawm HEC hmoov raws li qhov xav tau viscosity.
Maj mam ntxiv HEC rau cov dej sov, nplawm tas li kom tsis txhob clumping.
Cia qhov sib tov kom hydrate thiab o.
Muab cov tshuaj HEC nrog kua xab npum puag:
Maj mam ntxiv cov tshuaj HEC rau cov kua xab npum thaum nplawm maj mam.
Nco ntsoov faib tusyees kom tsis txhob muaj clumps thiab inconsistencies.
Saib xyuas viscosity thiab kho raws li xav tau.
Kev kho pH:
Ntsuas pH ntawm qhov sib tov thiab kho yog tias tsim nyog siv citric acid lossis sodium hydroxide.
Kev tswj xyuas qhov pH kom zoo yog qhov tseem ceeb rau kev ruaj ntseg ntawm cov qauv.
Test thiab optimize:
Kev ntsuam xyuas viscosity tau ua nyob rau ntau theem txhawm rau txhim kho qhov concentration ntawm HEC.
Kho daim ntawv qhia raws li cov txiaj ntsig kev xeem kom txog rau thaum qhov kev xav tau sib xws.
Stability thiab khaws cia xav txog:
Anti-corrosion system:
Muab cov txheej txheem tsim nyog los tiv thaiv kab mob microbial thiab txuas ntxiv lub neej txee ntawm cov kua xab npum tuab.
Pob:
Xaiv cov khoom ntim tsim nyog uas yuav tsis hnov mob nrog xab npum ua kua lossis cuam tshuam HEC stability.
Cia tej yam kev mob:
Khaws cov kua xab npum tuab rau hauv qhov chaw txias, qhuav kom deb ntawm lub hnub ncaj qha kom nws ruaj khov thiab zoo nyob rau lub sijhawm ntev.
Hydroxyethylcellulose yog ib qho tseem ceeb thickener uas muab kev daws teeb meem rau kev ua tiav qhov xav tau viscosity hauv cov kua xab npum formulations. Los ntawm kev nkag siab nws cov khoom, yam cuam tshuam rau thickening, thiab cov txheej txheem sib koom ua ke, cov neeg tsim khoom tuaj yeem tsim cov kua xab npum zoo nrog ntau dua qhov sib xws thiab kev ua haujlwm. Kev sim, kev sim thiab kev ua kom zoo yog qhov tseem ceeb ntawm cov txheej txheem, kom ntseeg tau tias cov khoom kawg ua tau raws li qhov yuav tsum tau ua thiab ua kom zoo nkauj. Los ntawm kev ua tib zoo xav txog cov khoom xyaw thiab cov txheej txheem tsim, cov tuam txhab ua kua xab npum tuaj yeem muab cov neeg siv khoom zoo thiab cov khoom zoo siab.
Post lub sij hawm: Dec-26-2023