Raws li kev txiav txim ntawm ultrasonic kua zog, ob lossis ob hom tsis sib xyaw ua ke, uas lub cev ntshiab ua rau muaj cov kua emulsion ua kua hauv lwm cov kua. Txoj kev ua no yog hu ua ultrasonic emulsification.
Ntau yam nruab nrab thiab cov neeg siv khoom lag luam, xws li tshuaj pleev ib ce thiab cov khoom siv tu tawv nqaij, cov xim pleev xim, cov tshuaj txhuam hniav thiab roj yog txhua yam lossis cov emulsions. Emulsions muaj nyob rau txhua qhov ntawm lub neej. Kev paub yuav ua li cas tswj thiab ua kom tau zoo tshaj plaws yog qhov tseem ceeb los tsim cov khoom lag luam siab. Zoo yog txhais raws li kev tsim nyog rau daim ntawv thov kawg.
Taw qhia rau Emulsification
Kev lag luam sib txawv muaj cov txheej txheem sib txawv emulsion sib txawv heev. Cov kev sib txawv no suav nrog cov khoom sib txawv uas siv (sib xyaw, suav nrog ntau yam hauv kev daws teeb meem), emulsification txoj kev, thiab kev ua haujlwm ntau. Emulsion yog qhov dispersion ntawm ob lossis ntau dua immiscible kua. Kev siv hluav taws xob siab - yog muab rau tawg cov kua ua kua (cov theem tawg) hauv cov tee me me ntawm lwm qhov thib ob (txuas ntxiv ntu). Zog.
Ob qho dej muaj peev xwm tuaj yeem tsim ntau hom emulsions, piv txwv li, roj thiab dej. Ua ntej, roj - hauv - dej emulsions, qhov twg cov roj yog cov khoom tawg thiab dej yog qhov nruab nrab dispersion. Thib ob, lawv tuaj yeem tsim cov dej - hauv - roj emulsions, uas dej yog theem dispersed thiab roj yog theem txuas ntxiv. Nws tseem ua tau los tsim ntau emulsions, suav nrog "roj - hauv - dej - hauv - dej" roj - hauv - Roj - Roj "emulsions.
Ultrasonic Cavitation Txheej Txheem
PopoMulsification yog tshwm sim los ntawm cavitation. Ultrasound hla los ntawm lub cev yuag ua rau nws txuas ntxiv mus txuas ntxiv thiab nthuav dav. Siab - Kev Siv Ultrasound Ultrasound muab lub zog yuav tsum tau tawg cov theem ua kua. Thaum qhov siab tshaj plaws tau mus txog, cov kua tawg ntawm qhov chaw uas cohesion yog tsis muaj zog dua. Tom qab agglomeration, overpressure tshwm sim ntawm qhov chaw uas lub agglomeration tshwm sim, thiab qee cov kab noj hniav tau pom. Nyob rau hauv cov kab noj hniav no, cov roj yaj hauv lub cev tawg tawg nyob rau hauv daim ntawv ntawm npuas tom qab lub sij hawm zoo.
Txhawm rau kom ruaj khov rau theem ua kua dej tawg ua kua los tiv thaiv cov roj av, cov tshuaj pleev cov saum npoo av, segractants) thiab stabilizers tau ntxiv rau lub emulsion. Qhov kawg me ntsis faib tawm yog tswj hwm nyob rau tib theem li thaum cov tee dej nyob hauv thaj chaw ultrasonic tsis tawg thiab muab faib.
Cov txheej txheem cavitation yog cuam tshuam los ntawm zaus thiab kev sib zog ntawm ultrasonic vuag. Cov tsos ntawm cavitation hauv lub cev yog nyob ntawm ib qho loj nyob rau hauv lub xub ntiag ntawm lub xub ntiag ntawm undissolved roj nyob rau hauv kev ua kua, uas zoo li ua raws li catalyst. Nyob rau hauv ib tug siab siab, tsim ntawm cov kab noj kab noj kab noj hniav yog nyob ntawm ib qho ntawm kev txhim kho lub sijhawm thiab ntau zaus. PhoaMulsification txheej txheem 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 ua haujlwm tsim nyog thiab zaus kom cov nyhuv muaj kev puas tsuaj yog hom.
Txhawm rau npaj cov roj - hauv - dej emulsion, lub suab qhov kawg ntawm qhov chaw qis dua li ntawm cov dej - hauv - roj emulsion. Hom kev ua suab sib cuam tshuam rau cov txheej txheem emulsification, uas yog, ib qho kev ncig ua ib qho chaw ncig ua si tau thov. Piv nrog thov qee qhov tsis ruaj khov, cov txheej txheem ua haujlwm tau zoo dua. Qhov no tuaj yeem piav qhia los ntawm qhov tseeb uas nyob rau hauv lub teb waim ci zoo li no, cov txheej txheem rov qab los ntawm dispersion, uas yog, hws yeej.
Lub sij hawm ncua: Jul - 26 - 2021