Ultrasonic zaub mov ua thev naus laus zis

Ultrasonic tshuab ua khoom noj

daim ntawv thov

Nrog rau qhov kev nce ntawm cov neeg siv khoom xav tau thiab nruj ntawm cov zaub mov thiab ib puag ncig cov kev cai, cov khoom noj khoom noj khoom haus ib txwm thev naus laus zis tau poob lawv qhov kev ua tau zoo tshaj plaws, ua rau muaj kev lag luam zoo tshaj. Ultrasound yog nrawm, muaj ntau lub hom phiaj, tsim tawm thiab muaj kev cog lus ntsuab tsis muaj kev cuam tshuam cov cuab yeej thov hauv kev lag luam khoom noj khoom haus hauv xyoo tsis ntev los no. Ultrasound siv nyob rau hauv ntau cov teb ntawm cov khoom noj thev naus laus zis, xws li crystallization, khov, tshuaj dawb, degassing, rho tawm, kom qhuav, pom, emulsification, kom tsis muaj menyuam, txiav, thiab lwm yam. Raws li cov cuab yeej muaj kev tiv thaiv zoo, ultrasound tau siv dav hauv cov zaub mov ua teb xws li raws li cov txiv hmab txiv ntoo thiab zaub, cereals, zib ntab, gels, cov protein, enzymes, microbial inactivation, cereal technology, kho dej, thiab mis nyuj thev naus laus zis.

Taw qhia

Xyoo dhau los, kev lag luam khoom noj khoom haus xav tau tsawg kawg nkaus rau cov zaub mov tiav tau ua rau muaj kev hloov pauv loj ntawm cov txheej txheem kev ua, vim hais tias nyob rau hauv cov kev mob tseem ceeb, qee cov txheej txheem thev naus laus zis txo lawv qib kev noj haus thiab bioavailability los ntawm kev tsim lub cev thiab tshuaj pauv, thiaj li txo tau kev nkag siab ntawm kev sib deev. Yog li, txhawm rau tswj cov khoom noj khoom haus, tsis noj zaub mov (kev ua haujlwm lom) thiab lub zog ntawm cov khoom muag, kev lag luam khoom noj khoom haus tau tsim cov kev ua tshiab maj mam los hloov cov thev naus laus zis. Cov txheej txheem ultrasonic yog ib qho ntawm cov thev naus laus zis sai uas yog txo kev ua haujlwm, txhim kho kom zoo dua qub, thiab ua kom muaj kev nyab xeeb ntawm khoom noj. Ultrasound thev naus laus zis, ua qhov tseem ceeb ntawm kev tshawb fawb thiab kev txhim kho hauv kev lag luam khoom noj khoom haus, yog raws cov khoom siv tshuab xaim nrog qhov nthwv siab tshaj qhov txwv ntawm tib neeg lub rooj sib hais (GG gt; 16khz), uas tuaj yeem muab faib ua ob qho: ntau lub zog tsawg thiab siab zog. Kev siv hluav taws xob qis (qis zog, qis-siv) ultrasound yog siab dua 100 kHz ntawm zaus hauv qab 1 Wcm − 2, thiab lub zog (zog-siab, siv-loj) ultrasound ntawm zaus ntawm 20 thiab 500 kHz Ntau dua 1 Wcm − 2.

Tus sawv cev ntawm cov neeg siv ntau zaus siv ntau hauv cov thev naus laus zis nruab nrab ntawm 20 kHz thiab 60 kHz. Raws li cov txheej txheem txheeb xyuas, ntau zaus siv ultrasound los siv cov ntaub ntawv ntawm cov khoom siv lub cev thiab tshuaj ntawm cov zaub mov xws li acidity, hardness, qab zib cov ntsiab lus, thiab kom loj hlob. Tsawg zaus tsawg zaus hloov ntawm lub cev thiab tshuaj lom neeg cov zaub mov los ntawm kev ua kom siab, shear thiab qhov kub thiab qhov sib txawv hauv qhov nruab nrab nws nthuav tawm, thiab tsim cov khoom tawm, thiaj li ua kom tsis muaj kab mob hauv cov zaub mov. Kev kho ultrasonic yog tsim nyog rau kev tswj hwm cov zaub tshiab thiab txiv hmab txiv ntoo ua ntej thiab tom qab sau qoob, kev ua cov khoom noj ntawm cov cheese, kev lag luam noj tau roj, mov ci thiab zaub mov, cov khoom noj muaj roj thiab emulsified rog, zaub mov, khoom noj aerated thiab khov zaub mov. Lwm daim ntawv thov muaj xws li kuaj pom txog kev ntoj ncig zib ntab thiab kev sib sau ua ke, kev ntsuas thiab hom protein tsawg. Qhov ntau zaus thiab qhov pom ntawm tsawg zaus ultrasound, nrog rau cov khoom sib nqus nuclear sib nqus (NMR), tam sim no yog qhov nrov tshaj plaws, siv tswv yim thiab dav siv tsis muaj kev cuam tshuam kev tsom xam. Tau ntau xyoo dhau los, tsawg zaus ultrasound tau ua tiav tau zoo siv los kawm cov physicochemical thiab cov yam ntxwv ntawm cov khoom noj khoom haus kua.

Lub Tshuab

Daim ntawv thov ntawm ultrasonic tsis nyob hauv lub tshuab ua kua tuaj yeem ua rau acoustic cavitation, uas yog, tiam, kev loj hlob thiab qhov tshwm sim tawg ntawm npuas. Thaum cov ultrasonic tsis muaj kev nthuav tawm, cov npuas oscillate thiab tawg nthe, ua cov cua sov, tshuab txhua yam thiab tshuaj lom neeg. Cov neeg kho tshuab cov teebmeem suav nrog kev sib tsoo lub zog, kev ntxhoo thiab shear kev ntxhov siab, thaum lub sij hawm tshuaj lom neeg tsis muaj dab tsi cuam tshuam rau cov cim ntawm cov dawb radicals Cavitation tsam ua kom muaj huab cua sov siab kawg (5000 K) thiab siab (1000 atm). Nyob ntawm qhov zaus ntawm cov xaim hluav taws xob, qhov hloov pauv tau zoo thiab tsis pom lub siab tsim nyob hauv zos tuaj yeem ua rau cov khoom nthuav tawm lossis ua kom tiav, ua rau cov xovtooj ntawm tawg. Ultrasound tuaj yeem ua dej hauv cov dej hauv oscillating npuas los ua H + thiab OH tsis pub dawb. Cov dawb radicals tuaj yeem raug ntes nyob hauv qee yam tshuaj lom neeg. Piv txwv li, dawb radicals tuaj yeem koom nrog hauv kev teeb tsa ua kom nyob ruaj khov, sib khi khi los yog catalytic ua haujlwm ntawm cov enzymes. Cov amino acid yog raug tshem tawm. Cov nyhuv no ultrasonic tawg yog qhov tseem ceeb los ntawm cov kua homogeneous.

Cov npuas tsim tawm thaum lub caij ultrasonic kho tau muab faib ua ob pawg raws li lawv cov qauv:

Qhov tsim ntawm cov huab loj uas tsis yog-tus tawm tsam huab nrog qhov sib luag ntawm qhov sib npaug thaum lub voj voog siab hu ua npuas cavitation ruaj khov.

Tsis ruaj khov, nrawm nrawm thiab sib cais mus ua npuas me yog hu ua npuas (ua haujlwm) cavitation npuas.

Cov npuas me me yaj sai, tab sis thaum lub sijhawm ua npuas ncab txheej txheem, huab hwm coj hloov txheej txheej txheej yog thinner thiab thaj tsam thaj tsam yog qhov loj dua thaj chaw sib tshuam thaum lub npuas tawg. Qhov no txhais tau tias cov huab cua nkag mus rau npuas thaum lub theem ncab yog loj dua cov pa ntws tawm thaum lub caij tawg.