Cov khoom siv emulsifying
Cov cuab yeej siv tshuab tseem ceeb rau kev npaj emulsion yog emulsifying tshuab, uas yog ib hom khoom siv emulsifying rau kev sib xyaw roj thiab dej sib npaug. Tam sim no, muaj peb lub ntsiab ntawm emulsifying tshuab: emulsifying tov khoom, colloid zeb thiab homogenizer. Emulsifying tshuab hom thiab cov qauv, kev ua tau zoo thiab qhov loj ntawm emulsion hais (dispersion) thiab qhov zoo ntawm emulsion (stability) muaj kev sib raug zoo. Feem ntau, xws li tam sim no dav siv nyob rau hauv tshuaj pleev ib ce Hoobkas stirring emulsifier, lub emulsion tsim los ntawm cov neeg pluag dispersion. Cov khoom yog loj thiab ntxhib, nrog kev ruaj ntseg tsis zoo thiab yooj yim muaj kuab paug. Tab sis nws cov khoom siv yog qhov yooj yim, tus nqi pheej yig, tsuav yog koj them sai sai rau cov qauv tsim nyog ntawm lub tshuab, siv kom zoo, tab sis kuj tuaj yeem tsim cov khoom zoo sib xws ntawm cov tshuaj pleev ib ce nrov. Colloid zeb thiab homogenizer yog cov khoom siv emulsifying zoo dua. Nyob rau hauv xyoo tas los no, emulsifying machinery tau ua tau zoo, xws li lub tshuab nqus tsev emulsifying, lub emulsion npaj los ntawm dispersion thiab stability ntawm zoo heev.
Qhov kub thiab txias
Qhov kub ntawm emulsification muaj qhov cuam tshuam zoo rau cov emulsification, tab sis tsis muaj kev txwv nruj rau qhov kub thiab txias. Yog tias cov roj thiab dej yog kua, lawv tuaj yeem ua emulsified los ntawm nplawm ntawm chav tsev kub. Feem ntau, emulsification kub nyob ntawm lub melting point ntawm cov khoom uas muaj siab melting point nyob rau hauv ob theem, thiab tej yam xws li hom emulsifier thiab solubility ntawm roj theem thiab dej theem yuav tsum xav txog. Tsis tas li ntawd, qhov kub ntawm ob theem yuav tsum tau khaws cia ze li qub, tshwj xeeb tshaj yog rau cov khoom siv roj thiab cov roj theem uas muaj cov ntsiab lus melting siab (siab tshaj 70 ℃), thaum emulsifying, qhov kub tsis tshua muaj dej theem yuav tsum tsis txhob ntxiv, thiaj li yuav tsum tau. tiv thaiv cov ciab thiab rog los ntawm crystallizing tawm ua ntej emulsification, ua rau loj los yog ntxhib thiab tsis sib xws emulsion. Feem ntau hais lus, thaum emulsifying, qhov kub ntawm cov roj thiab dej tuaj yeem tswj tau ntawm 75 ℃ thiab 85 ℃. Yog hais tias cov roj theem muaj siab melting point ciab thiab lwm yam khoom, lub emulsifying kub yuav siab dua nyob rau lub sij hawm no. Tsis tas li ntawd, yog tias cov viscosity nce siab heev hauv cov txheej txheem emulsification, qhov hu ua tuab heev thiab cuam tshuam rau kev sib xyaw, qee qhov emulsification kub tuaj yeem tsim nyog. Yog tias cov emulsifier siv muaj qee qhov kev hloov pauv kub, qhov kub ntawm emulsifying kuj yog qhov zoo tshaj plaws xaiv nyob ib ncig ntawm lub sijhawm hloov pauv kub. emulsification kub qee zaum kuj cuam tshuam qhov loj me me ntawm emulsion. Yog tias anionic emulsifier ntawm fatty acid xab npum feem ntau siv, qhov loj me ntawm emulsion yog li ntawm 1.8-2.0μm thaum emulsification kub tswj ntawm 80 ℃. Yog hais tias lub particle loj yog hais txog 6μm thaum lub emulsification yog nqa tawm ntawm 60 ℃. Cov nyhuv ntawm emulsification kub ntawm particle loj yog qaug zog thaum uas tsis yog-ionic emulsifier yog siv rau emulsification.
Emulsifying lub sijhawm
Lub sij hawm emulsification pom tseeb muaj kev cuam tshuam rau qhov zoo ntawm emulsion, thiab kev txiav txim siab ntawm emulsifying lub sij hawm yog raws li qhov ntim piv ntawm cov roj theem dej theem, ob theem viscosity thiab tsim cov viscosity ntawm emulsion, hom thiab ntau npaum ntawm emulsifier, emulsifying. kub, emulsifying lub sij hawm ntawm ntau npaum li cas, yog txaus los ua lub kaw lus ntawm emulsification, yog ze ze rau Kev ua haujlwm ntawm cov khoom siv emulsification, lub sijhawm emulsification tuaj yeem txiav txim siab raws li kev paub dhau los thiab kev sim. Emulsification nrog homogenizer (3000 RPM) tsuas yog 3-10 feeb xwb.
Sib tov ceev
Cov khoom siv emulsification muaj kev cuam tshuam zoo rau emulsification, ib qho ntawm cov kev cuam tshuam ntawm kev sib tw ceev ntawm emulsification. Nruab nrab stirring ceev yog ua kom cov roj theem thiab dej theem sib xyaw ua ke, tsis tshua muaj stirring ceev, obviously tsis tuaj yeem ua tiav lub hom phiaj ntawm kev sib xyaw, tab sis siab stirring ceev heev, yuav coj npuas rau hauv lub cev, kom nws dhau los ua peb- theem system, thiab ua rau cov emulsion tsis ruaj khov. Yog li, huab cua yuav tsum raug zam hauv kev sib xyaw, thiab lub tshuab nqus tsev emulsifying muaj kev ua tau zoo heev.
Post lub sij hawm: Oct-19-2021