Muaj ntau yam kev tshwm sim ntawmkev tsis ruaj khov ntawm emulsionCov no suav nrog: flocculation, coalescence, stratification (lossis sedimentation), demulsification, phase inversion thiab Ostwald ripening.
1. Kev sib xyaw ua ke
Cov tee dej uas tawg ua tej daim me me hauv cov emulsion aggregate los ua tej pawg me me uas muaj peb sab, uas yog cov flocs, thiab cov txheej txheem no hu ua flocculation. Nyob rau hauv ib txwm muaj xwm txheej, tsis muaj kev hloov pauv tseem ceeb hauv qhov loj me thiab kev faib tawm ntawm cov tee dej hauv flocs, thiab cov tee dej sib koom ua ke tsis tshwm sim, nrog rau cov tee dej khaws cia lawv cov khoom qub. Flocculation yog ua los ntawm cov zog nyiam ntawm cov tee dej. Cov zog no feem ntau tsis muaj zog, ua rau cov txheej txheem flocculation rov qab tau (hu ua flocculation tsis muaj zog), thiab kev ntxhov siab tuaj yeem cais cov flocs.
2.Kev sib koom ua ke
Yog tias cov tee dej ntawm cov flocculates sib sau ua ke, cov kua dej ntawm cov tee dej me me hauv yuav tawg thiab tsim cov hlaws dej loj dua. Cov txheej txheem no txhais tau tias yog kev sib koom ua ke. Kev sib koom ua ke yog ib qho txheej txheem uas tsis tuaj yeem rov qab tau, uas ua rau muaj kev txo qis ntawm cov tee dej thiab kev tawg tag nrho ntawm cov emulsions, uas yog kev sib cais roj-dej. Flocculation ua lub hauv paus rau kev sib koom ua ke, thaum kev sib koom ua ke yog qhov ua rau emulsion puas tsuaj.
3.Kev faib ua pawg
Vim yog qhov sib txawv ntawm qhov ceev ntawm cov roj theem thiab cov dej theem, cov tee dej yuav ntab lossis poob rau hauv qab qhov kev ua ntawm lub ntiajteb txawj nqus, tsim kom muaj qhov sib npaug ntawm cov tee dej concentration hauv cov emulsion. Cov txheej txheem no hu ua creaming lossis sedimentation. Txawm hais tias creaming ua rau qhov sib npaug ntawm cov emulsion tsis zoo, cov emulsion nws tus kheej tsis raug rhuav tshem tiag tiag.
4.Kev ua kom cov kua qaub tawm
Ib qho emulsion yog ib qho thermodynamic tsis ruaj khov uas nws lub xeev sib npaug kawg yog roj-dej sib cais thiab stratification (xws li ib txheej aqueous thiab ib txheej roj), thiab demulsification yog nws qhov tshwm sim tsis zam. Hauv qee qhov kev lag luam, demulsification yog qhov yuav tsum tau hloov. Piv txwv li, demulsifying crude roj (W/O) kom ua tiav kev sib cais roj-dej.
5.Variant
Ib qho emulsion tuaj yeem hloov pauv ntawm hom W/O mus rau hom O/W, lossis rov ua dua, vim muaj kev hloov pauv ntawm cov xwm txheej emulsification, thiab cov txheej txheem no hu ua theem inversion.
6. Ostwald siav
Cov emulsions nrog cov tee dej ntawm ntau qhov ntau thiab tsawg (polydisperse emulsions) tuaj yeem ruaj khov thiab tiv taus flocculation lossis coalescence. Txawm li cas los xij, dhau sijhawm, qhov loj me ntawm cov tee dej hloov mus rau cov tee dej loj dua, qhov nkhaus faib qhov loj me ntawm cov tee dej yuav ua rau muaj ntau dua, thiab qhov loj me ntawm cov tee dej feem ntau yuav sib xws. Qhov xwm txheej no, zoo ib yam li cov txheej txheem ntawm kev siav siv lead ua, hu ua Ostwald siav.
Lub sijhawm tshaj tawm: Plaub Hlis-24-2026