Muaj feem cuam tshuam thiab qhov zoo ntawm Ultrasonic Emulsification Equipment Rau Ua Emulsion

Ib tug emulsion yog ib tug dispersion ntawm ob immiscible kua, ib tug ntawm uas yog dispersed nyob rau hauv lwm yam nyob rau hauv daim ntawv ntawm zoo droplets los yog hais, ua ib tug tov kua. Cov txheej txheem ntawm dispersing ib immiscible kua nyob rau hauv lwm immiscible kua yog hu ua emulsification. Kev tsim ntawm emulsions yuav tsum tau ua cov txheej txheem tsim nyog ntawm cov kua emulsification, uas siv cov tshuab shear los rhuav tshem cov theem ntawm cov tee dej loj nyob rau theem tas mus li.

tshuaj pleev ib ce

Ultrasonic emulsification yog ib qho kev txhais tau tias ntawm emulsification, uas yog, siab - zaus vibration yog siv rau lub taub hau lub cuab tam los ntawm ib tug ultrasonic transducer, thiaj li hais tias ob immiscible kua yog tov los ua ib tug emulsion. Piv rau cov txheej txheem emulsification ib txwm muaj, piv txwv li cov tshuab ua kom zoo ib yam, sonication tuaj yeem tsim cov tee me me, thiab phacoemulsification feem ntau yuav tsum tau qis dua ntawm surfactant los muab cov emulsion ruaj khov dua li lwm cov tswv yim.

01

Cov yam ntxwv cuam tshuam rau Ultrasonic Emulsification

Ntau yam uas cuam tshuam thiab tswj sonication muaj xws li ultrasonic zog, lub sij hawm, sonication zaus, thiab emulsion kub.

suab zaus

Qhov zaus ntawm 20 mus rau 40 kHz ua qhov zoo tshaj plaws emulsification, uas yog, nyob rau hauv qis zaus, lub shear quab yuam muaj ntau dua rau cov emulsification. Raws li lub ultrasonic zaus nce, lub sij hawm yuav tsum tau rau cov npuas kom nthuav thiab vau txo, yog li txo qhov degree ntawm shearing. Ntawm cov zaus ntau dua, qhov pib cavitation nce thiab cov txheej txheem sonication tsis tshua muaj txiaj ntsig vim ntau lub zog yuav tsum tau pib cavitation. Cov khoom siv ultrasonic emulsification tuaj yeem xaiv los ntawm 20 mus rau 40 kHz zaus, thiab cov cuab yeej sib txawv tuaj yeem xaiv tau raws li daim ntawv thov tshwj xeeb.

Ultrasonic zog

Ultrasonic lub zog yog ib qho tseem ceeb ntawm kev tswj cov emulsion emulsification efficiency. Raws li lub zog ultrasonic nce, lub droplet loj ntawm lub dispersed theem txo. Txawm li cas los xij, thaum lub zog tawm tswv yim ntau dua 200 W, cov emulsion me me sib sau ua cov tee loj. Qhov no yog vim muaj coob tus cavitation npuas, tsis tshua muaj zog ceev ceev, muaj zog droplet concentration, thiab siab tus nqi ntawm kev sib tsoo ntawm cov tee dej nyob rau hauv cov kev mob no. Yog li ntawd, nws yog ib qho tseem ceeb heev los txiav txim siab lub zog zoo thaum lub sij hawm phacoemulsification. Raws li lub sij hawm homogenization nce, tiam ntawm me me tee kuj nce. Nyob rau tib lub zog ceev, ob txoj kev emulsification tuaj yeem muab piv rau kev tshuaj xyuas lawv cov kev ua tau zoo hauv kev ruaj khov emulsion tsim.

Tshuaj kub

Thaum lub sij hawm phacoemulsification, qhov nruab nrab ntawm kev daws qhov kub thiab txias ua rau txo qis ntawm qhov sib txuam ntawm cov viscosity thiab viscosity ntawm cov tshuaj, ua rau nws yooj yim rau kev sib tov, thiab ua kom cov npuas cavitation. Cov qauv no muaj txiaj ntsig zoo rau tag nrho cov txheej txheem emulsification. Txawm li cas los xij, qhov cuam tshuam ntawm qhov kub thiab txias tsis tu ncua ntawm emulsification tuaj yeem ua rau muaj kev puas tsuaj: tus naj npawb ntawm cavitation nuclei nce nrog qhov kub thiab txias, thiab huab cua siab hauv cov npuas kuj nce ntxiv, uas ua rau muaj kev cuam tshuam ntawm kev poob siab yoj thiab tsim ntau tus. ntawm npuas. Qhov no txo ​​qhov siab tshaj plaws mus txog thaum lub npuas implodes. Vim qhov nce ntawm evaporation nyob rau hauv cov npuas, lub cev qhuav dej ntawm cov npuas yuav tsis nruj, uas ua rau txo qis shear rog thiab emulsification efficiency.

Lub sijhawm Sonication

Feem ntau, kev nce hauv phacoemulsification lub sij hawm ua rau txo qis ntawm qhov loj ntawm cov kab mob sib kis. Thaum lub sij hawm, tus nqi ntawm ultrasonic zog nyob rau hauv cov kev daws kuj nce, uas ua rau ib tug nce nyob rau hauv tus naj npawb ntawm cov tawg tawg thiab ib tug txo nyob rau hauv qhov loj ntawm cov emulsion droplets. Txawm li cas los xij, dhau ntawm lub sijhawm ua haujlwm, piv txwv li, dhau lub sijhawm ua haujlwm zoo, cov tee me me yuav coalesce rau hauv cov tee dej loj dua vim qhov ntau ntawm cov tee dej ntau ntau thiab kev sib tsoo ntawm cov tee dej.

02

Qhov zoo ntawm Ultrasonic Emulsification

Tsis zoo li cov txheej txheem emulsification thiab khoom siv ib txwm muaj, cov txiaj ntsig ntawm phacoemulsification yog qhov pom tseeb.

Txhim kho cov nyhuv emulsification

Depending on the droplet size of the dispersed phase, emulsions can be classified into microemulsions (10–100 nm), nanoemulsions (100–1000 nm), and macroemulsions (0.5–100 μm). Ultrasound is an effective method to reduce the particle size of dispersions and emulsions. Ultrasonic emulsification equipment can obtain emulsions with small particle size (only 0.2–2 μm) and narrow droplet size distribution (0.1–10 μm), and the use of emulsifiers can also increase the concentration of the emulsion by 30 percent to 70 percent .

Txhim kho emulsion stability

Qhov tseem ceeb, emulsions yog kinetically tsis ruaj khov, tsis txhob tsim spontaneously, thiab cais mus rau hauv lawv cov theem theem yog tias lawv stability tsis tswj. Yog li ntawd, txhawm rau txhawm rau txhim kho cov tee tshiab ntawm cov txheej txheem tawg tawm tsam coalescence, emulsifiers thiab stabilizers raug ntxiv rau emulsion. Phacoemulsification yuav tsum tau me me los yog tsis muaj emulsifier kom tau emulsions ruaj khov. Tom qab sonication, emulsion tuaj yeem nyob ruaj khov rau ob peb lub hlis lossis ntau tshaj li ib nrab xyoo.

Tswj hom emulsion

Raws li qee qhov xwm txheej, ob qho "dej-hauv- roj" thiab "roj-hauv- dej" hom emulsions tuaj yeem tsim los ntawm cov txheej txheem ultrasonic. Txoj kev emulsification ib txwm muaj peev xwm tsuas yog tswj cov khoom ntawm emulsion los ntawm kev ntxiv cov emulsifier, thiab hom emulsion tsis tuaj yeem hloov pauv yooj yim los ntawm kev siv tshuab. Ultrasonic emulsification khoom ua rau cov txheej txheem emulsification yooj yim dua thiab hloov tau.

Kev siv hluav taws xob tsawg

The power consumption of ultrasonic emulsification is smaller, and the power consumption required to manufacture the same volume of emulsion is smaller than that of a high-pressure homogenizer. To manufacture an emulsion with a capacity of 4.55 m3/h and droplets of 1 μm size, such as using ultrasonic emulsification technology, only a driving force of 57 HP can be required at a working pressure of 10.514.1kg/cm2, but a high-pressure homogenizer is 70.3351.6kg. However, a driving force of 4050 HP is required at a working pressure of / cm2, so the use of phacoemulsification technology can reduce a lot of energy consumption.

Txhim kho qhov ua tau zoo ntawm emulsification

Ultrasonic emulsification can produce emulsions that cannot be produced by ordinary emulsification methods. As the energy density increases, the droplet size decreases. At appropriate energy density levels, phacoemulsification technology can achieve average droplet sizes of less than 1 μm. Ultrasound makes the entire emulsification process faster and produces a higher-purity emulsion.