Emulsifier
Jan 11, 2021
Raws li peb txhua tus paub, roj thiab dej tsis sib tov ncaj qha, tab sis lawv tuaj yeem tsim lub tshuab emulsion, thiab cov no yog qhov tseem ceeb rau kev sib xyaw nrog ntau cov zaub mov. Xwm yog qhov zoo ntawm kev ua emulsions. Qhov piv txwv qub yog mis nyuj, qhov twg qhov sib xyaw ua ke ntawm cov roj ntsha raug tshem tawm hauv kev daws teeb meem.
Emulsifiers yog tshuaj lom neeg uas ua rau emulsification tshwm sim. Xwm siv cov protein thiab phospholipids, thiab ntau cov emulsifiers siv hauv kev tsim khoom noj niaj hnub yog ua raws li cov khoom siv hauv ntuj tsim.
Cov emulsifier yog cov qauv nyob rau hauv uas ib qho kawg nyiam nyob hauv qhov chaw muaj roj thiab lwm qhov kawg nyiam nyob hauv qhov chaw dej. Txhawm rau npaj cov roj-hauv-dej emulsions, xws li mayonnaise, cov tee roj ntawm cov roj molecules tau ncig los ntawm oily xaus ntawm lub emulsifier lwg me me. Qhov no tawm qhov kawg ntawm cov dej hlub sab nraum cov tee dej, yog li lawv zaum zoo siab nyob hauv dej thiab tau txais kua tsis sib xyaw es tsis txhob ua kom sib xyaw kom haum ntawm dej thiab kua roj. Hauv mayonnaise, cov emulsifiers yog cov phospholipids hauv lub qe qe-lawv tau ua tiav emulsifiers zoo heev uas tuaj yeem tawg mus txog 80% ntawm cov roj hauv theem dej.
Mis nyuj khov yog lwm cov zaub mov uas tsis yog siv los ua emulsifier. Nws yog ob qho tib si ua npuas dej thiab emulsion, thiab nws cov ntawv sau los ntawm dej khov thiab cov dej tsis khov uas nws muaj. Txawm li cas los xij, emulsifiers tsis yog tsuas yog tsim nyog rau cov khoom noj muaj roj mis, emulsifiers tseem tuaj yeem txhim kho qhob cij thiab lwm yam khoom ci (hauv cov khoom sib cais tau tawg ua npuas dej ua npuas ncauj).
Cov lag luam emulsifiers siv los ntawm cov khoom siv ntuj thiab hluavtaws. Lawv suav nrog:
(E322) yog phospholipids, xws li phosphatidylcholine thiab phosphatidylethanolamine, feem ntau yog muab rho tawm los ntawm cov khoom siv xws li qe qe thiab taum pauv. Qhov tseeb muaj pes tsawg leeg ntawm phospholipids nyob ntawm lub hauv paus. Kev siv suav nrog kev hnav khaub ncaws hnav, khoom ci thiab khoom qab zib.
Fatty acid monoglycerides (E472a-f) yog tsim los ntawm ntuj fatty acids, glycerin thiab organic acids (xws li acetic acid, citric acid, lactic acid lossis tartaric acid). Cov rog ua rog feem ntau yog los ntawm cov ntoo cog, txawm hais tias tsiaj siv los kuj siv tau. Cov khoom lag luam uas siv lawv suav nrog mis nyuj khov, khoom qab zib thiab qos yaj ywm ci.
Fatty acid monoglycerides thiab diglycerides (E471) yog cov roj ib qho hluavtaws ua los ntawm glycerin thiab cov roj ntsha ntuj. Kev tsim cov roj ntuj ntuj tuaj yeem muab tau los ntawm nroj tsuag lossis tsiaj txhu. Lawv siv rau hauv cov khoom lag luam xws li khob cij, ncuav thiab margarine.
