Ntsiab Cai ntawm Ultrasonic Extraction

Ntsiab cai ntawm ultrasonic extraction

Ultrasound (zaus ntawm 20 kHz thiab 1 MHz) yog ib qho kev ua lag luam uas yuav tsum tau muaj lub zog cov cab kuj-nruab nrab kom propagate.

Lub hauv paus ntawm ultrasonic extraction yog siv cov cavitation nyhuv, txhua yam nyhuv thiab thermal cov nyhuv ntawm ultrasonic tsis mus extract cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov qauv los ntawm kev nce lub ceev ceev ntawm lub nruab nrab ntawm molecules thiab nce lub zog ntawm qhov nruab nrab. Cov nram no yog ib qho piv txwv ntawm suav tshuaj herbal:

(1) Cavitation nyhuv Feem ntau, qee cov microbubbles muaj ntau dua los sis tsawg dua hauv nruab nrab. Cov npuas voos nyob rau hauv qhov kev txiav txim ntawm ultrasonic tsis. Thaum lub suab siab nce mus txog ib qho nqi, cov npuas yuav nce vim yog qhov kev tswj fwm, tsim cov kab noj hniav. Thiab mam li nco dheev kaw, qhov no yog cov nyhuv cavitation ntawm ultrasound. Thaum lub npuas raug kaw lawm, nws ua rau lub siab ntawm ob peb txhiab atmospheres ncig nws, tsim ib lub micro-shock, uas tuaj yeem ua rau ntawm phab ntsa cog thiab tag nrho cov kabmob ua rau tawg, thiab tag nrho txoj kev tawg yog tiav hauv ib qho instant, uas yog rau qhov dissolution ntawm lub active khoom sib ua.

(2) Mechanical effect Cov propagation ntawm ultrasonic tsis nyob hauv nruab nrab yuav ua rau nruab nrab hais mus rau hauv lawv qhov chaw cia, qhov no pab tau qhov diffusion thiab tawm ntawm cov nruab nrab, uas yog cov neeg ua hauj lwm zoo ntawm cov ultrasonic tsis. Ultrasonic tsis ua kom muaj ib hom hluav taws xob hauv cov txheej txheem ntawm kev tawm tswv yim, uas propagates raws cov kev taw qhia ntawm lub suab tsis, uas muaj lub zog ua rau cov khoom siv, uas tuaj yeem deform cov nqaij thiab cov kab npauj ntawm cov nroj tsuag. Nyob rau tib lub sijhawm, nws tuaj yeem muab qhov nruab nrab thiab kev ncua kev sib tw ntau. Thiab tus tshaj tawm ntawm lub nruab nrab molecules yog sai dua qhov tshaj tawm ntawm cov raug rho tawm haujlwm molecules. Li no, txhuam yog generated ntawm ob, uas tau depolymerize cov biomolecules, kom lub zog yam ntawm cov phab ntsa ntawm tes dissolve nyob rau hauv qhov hnyav sai.

(3) Thermal cov nyhuv Ib yam li lwm lub cev tsis muaj zog, qhov kev tawm tswv yim ntawm ultrasonic tsis nyob hauv nruab nrab kuj yog ib qho kev siv hluav taws xob thiab kev tawm dag zog. Uas yog, thaum lub sij hawm ntawm propagation ntawm ultrasonic tsis, lub zog acoustic yog tsis tu ncua absorbed los ntawm cov khoom ntawm lub nruab nrab, thiab qhov nruab nrab yuav nqus nws. Tag nrho los sis feem ntau ntawm lub zog yuav hloov mus rau hauv cov hluav taws xob kub, uas ua rau kom muaj qhov nce ntawm qhov nruab nrab ntawm qhov nruab nrab thiab cov ntaub so ntswg, uas ua kom cov kev sib tawg ntawm cov khoom muaj zog ntawm cov tshuaj. Txij li thaum nce hauv qhov kub thiab txias ntawm cov tshuaj siv los ntawm qhov nqus ntawm lub zog acoustic instantaneous, qhov kev ua txheeb raws roj ntsha ntawm qhov muab rho tawm tau khaws cia tas li.