Lub hauv paus ntsiab lus ntawm emulsification yog dab tsi?

Nyob rau hauv qhov kev txiav txim ntawm ultrasonic zog, ob los yog ntau tshaj immiscible kua yog tov ua ke, thiab ib tug ntawm cov kua yog kuj uniformly dispersed nyob rau hauv lwm yam kua los tsim ib tug emulsion - zoo li kua. Cov txheej txheem no yog hu ua ultrasonic emulsification.

Phacoemulsification yog tshwm sim los ntawm qhov tshwm sim ntawm cavitation. Ultrasonic nthwv dej dhau los ntawm cov kua ua rau nws compress thiab nthuav tsis tu ncua. High - siv ultrasonic tsis muab lub zog xav tau los ua kom tawg cov kua theem. Thaum qhov siab tshaj plaws tau mus txog, ntawm qhov taw tes ntawm kev sib koom ua ke tsis muaj zog, cov kua rupture tshwm sim. Tom qab qhov rupture no, overpressure tshwm sim ntawm qhov chaw ntawm rupture thiab ib co kab noj hniav tau pom. Nyob rau hauv cov kab noj hniav, cov kua yaj cov roj tawg tom qab ib lub sij hawm luv luv nyob rau hauv daim ntawv ntawm npuas.

Txhawm rau kom ruaj khov cov txheej txheem tshiab dispersed cov tshuaj tiv thaiv coalescence, emulsifiers (surfactants, surfactants) thiab stabilizers ntxiv rau emulsion. Qhov kawg droplet loj faib tau khaws cia nyob rau tib theem li thaum cov tee dej tau faib tom qab tawg nyob rau hauv lub ultrasonic dispersion cheeb tsam.

Cov txheej txheem cavitation yog cuam tshuam los ntawm qhov zaus thiab kev siv ntawm ultrasonic tsis, thiab cov tsos ntawm cavitation nyob rau hauv lub cev feem ntau nyob ntawm seb lub xub ntiag ntawm undissolved gas raug tshem tawm nyob rau hauv cov kua, uas zoo nkaus li ua raws li ib tug catalyst. Ntawm ib lub siab, qhov tsim ntawm cov kab noj hniav nyob ntawm qee qhov ntawm lub sijhawm txhim kho thiab qhov zaus ultrasonic. Cov txheej txheem phacoemulsification sawv cev rau kev sib tw ntawm cov txheej txheem tawm tsam. Yog li ntawd, nws yog ib qho tsim nyog los xaiv cov kev khiav hauj lwm tsim nyog thiab zaus kom cov nyhuv puas tsuaj dominates.

Ultrasonic cavitation nyhuv

Txhawm rau npaj cov roj - hauv - dej emulsions, qhov kawg lub suab siv zog qis dua li qhov kev npaj dej - hauv - roj emulsions. Hom suab teb cuam tshuam rau cov txheej txheem emulsification, piv txwv li ib qho kev mus ncig ua si yog siv. Piv nrog rau kev siv qee qhov chaw nres tsheb, cov txheej txheem ua haujlwm tau zoo dua. Qhov no tuaj yeem piav qhia los ntawm qhov tseeb tias nyob rau hauv qhov chaw nyob ruaj khov, cov txheej txheem rov qab mus rau dispersion, condensation, predominates.