Emulsifying Los ntawm Ultrasonic Cavitation

Ntau qhov nruab nrab thiab cov neeg siv khoom lag luam, xws li tshuaj pleev ib ce thiab tshuaj pleev tawv nqaij, tshuaj pleev tshuaj, kua roj vanish, pleev xim thiab roj nplua nyeem thiab roj muaj raws li tawg tag nrho lossis qee qhov ntawm emulsions.

Cov tshuab muaj ob peb lub ultrasonic ua kom txog li 16,000 watts txhua, muab lub peev xwm xav tau los txhais qhov kev thov siv (lab) no rau hauv cov qauv kev tsim khoom kom tau txais cov khoom tawg ua emulsions nyob rau hauv kev txuas mus ntxiv lossis hauv ib qho - ua tiav cov txiaj ntsig sib piv rau qhov zoo tshaj plaws niaj hnub no siab homogenizers muaj. Ntxiv rau qhov no ua hauj lwm siab hauv kev coj ua emulsification tsis tu ncua, Altrasonic ultrasonic cov cuab yeej xav tau kev txij nkawm qis heev thiab yooj yim heev rau kev khiav lag luam thiab ntxuav. Tus ultrasound yeej txhawb kev tu thiab yaug. Lub zog ultrasonic tau kho tau thiab tuaj yeem hloov kho rau cov khoom tshwj xeeb thiab emulsification.

Emulsions yog kev sib faib ntawm ob lossis ntau dua kua nyeem tsis tau. Cov khoom siv hluav taws xob muaj zog siab siv ultrasound lub zog xav tau txhawm rau txhawm rau ntu kua (dispersed theem) hauv cov mob me me hauv theem ob (cov theem txuas ntxiv). Nyob hauv thaj chaw dispersing, imploding cavitation npuas ua rau lub zog poob siab ntawm cov kua uas nyob ib puag ncig thiab ua rau kev tsim cov kua roj ua kua ntawm lub siab ua kua.

Txhawm rau ruaj khov cov kab mob tsim tawm tshiab ntawm cov tawg disperse theem tawm tsam coalescence, emulsifiers (cov khoom ua kom nto, surfactants) thiab stabilizers ntxiv rau emulsion. Raws li coalescence ntawm cov tee dej tom qab kev cuam tshuam los cuam tshuam qhov kawg ntawm qhov loj me me faib, kev tswj kom ruaj khov emulsifiers tau siv los tswj qhov kawg ntawm qhov loj me me faib ntawm qib uas yog sib npaug nrog faib tawm tam sim ntawd tom qab kev cuam tshuam ntawm dej ntws hauv ultrasonic dispersing cheeb tsam. Stabilizers ua tau ua rau kev txhim kho droplet cuam tshuam ntawm lub zog lub zog.

Cov kev tshawb fawb ntawm cov roj hauv dej (dej theem) thiab dej hauv cov roj (cov roj theem) emulsions tau qhia txog txoj kev sib txheeb ntawm lub zog ntawm lub zog thiab qhov loj me me (piv txwv li Sauter diameter). Muaj qhov tseeb meej rau cov tee me me loj dua ntawm kev nce zog ntawm qhov hnyav (nyem ntawm daim duab xis). Thaum tsim nyog cov zog ceev theem, ultrasound tuaj yeem ua tiav qhov txhais hais tias droplet ntau thiab tsawg hauv qab 1 micron (microemulsion).