Hydroxyethyl cellulose (HEC) yog ib qho tseem ceeb ntawm cellulative uas tau siv dav hauv kev lag luam txheej ntau yam xws li thickening, ruaj khov, dej tuav, thiab dispersion. Nws yog qhov tshwj xeeb tshaj yog nrov nyob hauv cov dej pleev dej vim tias nws cov khoom siv lub cev thiab tshuaj lom neeg tuaj yeem txhim kho kev ua tau zoo ntawm cov txheej txheem.
1. Thickening nyhuv
Ib qho ntawm cov tseem ceeb tshaj plaws siv ntawm hydroxyethyl cellulose hauv cov txheej txheej yog nws cov khoom siv ua tau zoo heev. Raws li cov dej-soluble polymer compound, hec tuaj yeem nqus dej nyob rau hauv txheej txheej txheej thiab ua ib qho kev daws teeb meem ruaj khov, yog li nce cov viscosity ntawm txheej. Qhov no tsis tsuas pab txhawm rau txhim kho cov xim ua haujlwm ntawm cov xim, tab sis kuj tso cai pleev xim kom muaj kev ua kom zoo thiab cov khoom tsim qauv sab nraud thaum lub sijhawm tsim kho. Lub zog ntawm nws cov peev xwm thickened yog ze ze rau yam xws li kev hnyav molecular thiab qib hloov chaw. Cov khoom sib txawv Hec tuaj yeem xaiv cov qauv molecular tsim nyog raws li cov kev xav tau.
2. Dej Tuav Kev Ua Haujlwm
HEC Cov Dej-khaws cov khoom ua rau nws tseem ceeb rau cov tsho tiv no, tshwj xeeb hauv cov cuab yeej kos duab kos duab thiab cov paste pleev xim. Thaum lub sij hawm kev tsim kho ntawm cov xim pleev xim, dej ntws dhau, uas tuaj yeem ua rau muaj teeb meem xws li kev tawg ntawm cov yeeb yaj kiab txheej thiab txo adhesion. HEC tuaj yeem nqus dej noo thiab ncua nws cov txheej txheem evaporation, tso cai rau cov txheej txheem kom tsim nyog tau cov av noo thiab zam cov teeb meem tsis zoo thaum kev tsim kho. Cov yeeb yam no tshwj xeeb yog qhov tseem ceeb hauv kev tsim kho ib puag ncig uas muaj cov xwm txheej qhuav.
3. Kev ruaj khov thiab rhuaology tswj
Hec tseem muaj kev ntseeg zoo sai sai ntawm kev hloov kho cov tshuab hauv cov txheej txheem txheej. Nws tuaj yeem hloov kho lub thixotropy los tswj lub viscosity siab thaum cov xim muaj chaw nyob thiab tiv thaiv qhov teeb pom kev ntawm cov pigments thiab fillers; Thaum lub sijhawm kev tsim kho, nws tuaj yeem txo qhov viscosity thiab txhim kho cov fluce thiab qhov muag tau ntawm cov xim. Qhov no thixotropy yog ntawm qhov tseem ceeb tshaj plaws kom txhim kho cov kev cia khoom ruaj khov thiab ua haujlwm ntawm cov txheej txheem. Nyob rau tib lub sijhawm, HEC tseem cuam tshuam tau yooj yim dua lub khov-yaj tau ruaj khov ntawm cov txheej txheem zoo nyob rau hauv cov kev mob kub tsawg thiab tiv thaiv kev ua si lossis kev ua kom zoo los yog kev ua haujlwm ntawm kev tshwm sim.
4. Cov nyhuv ntawm emulsion stabilizer
Hauv cov xim pleev xim emulsion xws li cov xim looj kua yas, hydroxyethyl cellulose kuj ua raws li emulsion stabilizer. HEC tuaj yeem sib txuas nrog lub aqueous theem thiab cov organic theem ua rau cov txheej txheem emulsification ruaj khov thiab tiv thaiv emulsion stratification lossis kev sib sau ua ke. Nyob rau tib lub sijhawm, nws tseem tuaj yeem txhim kho cov kev sib txawv ntawm cov xim, cia cov xim thiab cov pigments thiab fillers kom tsis txhob muaj cov xim kom tsis txhob muaj cov khoom lossis xim sib txawv. Qhov no tseem txhim kho cov tsos, kev tsim kho thiab ruaj khov ntawm txheej.
5. Kev txhim kho ntawm kev tsim kho kev ua haujlwm
HEC muaj peev xwm txhim kho kev ua tau zoo ntawm kev ua tau zoo ntawm cov txheej txheem, tshwj xeeb tshaj yog cov smoothness ntawm txhuam hniav lossis txau. Thaum lub sij hawm tha xim tha xim, HEC tuaj yeem txo cov ntsiab lus txhuam thiab ua cov duab yeeb yaj kiab smoother thiab ntau yam kev hnav khaub ncaws. Tsis tas li ntawd, nws txo cov duab puab, thiab ua rau zaj duab xis denser thiab smoother, yog li kev txhim kho txhua yam zoo ntawm cov txheej. Qhov kev txhim kho no hauv kev tsim kho kev ua haujlwm yog qhov tseem ceeb tshaj plaws rau kev nce qib thiab kev thov cov dej pleev dej.
6. Kev hloov tau thiab ib puag ncig ua haujlwm
Lwm qhov txiaj ntsig tseem ceeb ntawm hydroxyethyl cellulose yog nws kev ua haujlwm ib puag ncig. HEC yog lub ntuj cellulose derivative nrog zoo biodegradity thiab yuav tsis ua rau muaj kuab paug nyob ntev rau ib puag ncig. Tsis tas li ntawd, nws qhov kev lom zem qis tso cai rau nws siv hauv cov dej pleev dej uas yog tus phooj ywg zoo thiab ib puag ncig tus phooj ywg kev lag luam.
Nyob rau tib lub sijhawm, HEC muaj cov tshuaj ruaj khov thiab tuaj yeem yoog raws li ntau yam kua qaub thiab alkali ib puag ncig, uas ua rau nws qhia tau zoo sib xyaw nyob rau hauv ntau cov txheej txheem txheej. Seb nws daim xim looj xwb, cov xim kos duab kos duab, lossis cov roj ua haujlwm zoo nrog lwm cov khoom xyaw tsis ua rau muaj kev phiv los yog puas cov xim ua haujlwm.
7. Txom Rau Cov Lus Qhia thiab Xaiv
Nyob rau hauv txheej txheej txheej txheej txheem ntau lawm, nws yog ib qho tseem ceeb rau xaiv cov khoom lag luam hydroxyethyl cellulose khoom. Lub cev hnyav molecular, degree ntawm hloov chaw, solubility hloov chaw, solubility thiab rheology ntawm Hec yuav txhua tus cuam tshuam rau cov nyhuv kawg ntawm txheej. Feem ntau hais lus, siab molecular hnyav HEC muaj cov nyhuv tuab tuab tuab, thaum cov molecular hnyav hoc yog qhov uas tsis muaj stabilizer lossis dispersant. Tsis tas li ntawd, txoj kev xaus ntawm HEC thiab cov pob tshab ntawm kev daws teeb meem tseem yuav cuam tshuam cov tsos zoo thiab kev tsim kho cov txheej txheem. Yog li ntawd, nyob rau hauv cov kev thov sib txawv, nws yog qhov tsim nyog los xaiv cov khoom lag luam uas tsim nyog raws li cov kev xav tau.
Hydroxyethyl cellulose yog dav siv nyob rau hauv lub txheej kev lag luam. Nws cov dej ua tuab, tswj thiab tshem tawm thiab dispersion cov khoom muaj peev xwm txhim kho qhov zoo thiab kev ua tau zoo ntawm cov txheej txheem. Nyob rau tib lub sijhawm, Hec ib puag ncig kev tiv thaiv kev ua tau zoo kuj ua rau nws nyob rau hauv txoj kab nrog kev txhim kho kev txhim kho ntawm kev lag luam niaj hnub niaj hnub. Nyob rau hauv lub neej yav tom ntej, nrog kev nce qib nruam ntawm txheej thev naus laus zis thiab hloov hauv kev lag luam hydroxyethyl ntawm cov txheej txheem yuav dhau los ua kom dav dav thiab tob tob.
Lub Sijhawm Post: Feb-17-2025