Dab tsi ua rau viscosity hauv tshuaj tsuag tshuab ziab kom qhuav ... Yuav ua li cas tswj
Ntsiab lus:
Cov zaub mov tsuag dej-qhuav tau muab faib ua ob pawg: tsis txhob nplaum thiab khov. Cov khoom xyaw tsis yog cov khoom nplaum yog yooj yim rau cov tshuaj tsuag kom qhuav, cov tshuab ziab yooj yim thiab hmoov zoo heev. Piv txwv ntawm cov ntaub ntawv tsis-stick suav nrog cov hmoov qe, cov hmoov mis, cov tshuaj thiab lwm yam maltodextrin, pos hniav thiab protein. Nyob rau hauv rooj plaub cov zaub mov nplaum, muaj teeb meem kom qhuav nyob rau hauv ib txwm tshuaj tsuag cov xwm txheej. Cov zaub mov nplaum nplaum feem ntau yog lo rau phab ntsa ntawm lub tshuab ziab khaub ncaws, lossis ua cov zaub mov tsis muaj qoob loo hauv kev ziab thiab cov teeb meem kev lag luam, cov khoom lag luam kom tsawg. Qab zib thiab cov khoom noj kua qaub yog cov qauv zoo.
Viscos yog qhov tshwm sim tau ntsib hauv cov txheej txheem kom qhuav ntawm cov khoom noj khoom haus nplua nuj hauv glycolic acid. Hmoov viscosity yog ib hom cohesion adhesion kev ua haujlwm. Nws tuaj yeem piav qhia cov me me-particle viscosity (Cohesion) thiab particle-phab ntsa viscosity (adhesion). Qhov kev ntsuas ntawm kev sib tsoo nrog cov hmoov ua kom yog vim nws cov yam ntxwv sab hauv hu ua cohesion, sib sau masses hauv lub hmoov txaj. Yog li ntawd, lub zog uas yuav tsum tau ua txhaum los ntawm cov hmoov agglomerate yuav tsum muaj ntau dua qhov cohesion. Adhesion yog kev ua tau zoo sib cuam tshuam, thiab cov hmoov txuas ua raws li cov qauv ntawm cov tshuaj tsuag cov khoom siv qhuav. Cohesion thiab adhesion yog cov yuam sij tseem ceeb rau kev tsim kom qhuav thiab ziab. Qhov saum npoo sib xyaw ntawm cov hmoov uas yog tsuas yog lub luag haujlwm rau viscosity. Lub cohesion thiab adhesion nyiam ntawm cov hmoov part part part partic cov ntaub ntawv sib txawv. Vim hais tias kev ziab yuav tsum muaj ntau ntawm solute kom pauv mus rau qhov chaw particle, nws yog qhov loj. Ob lub viscosity cov yam ntxwv (Cohesion thiab adhesion) tuaj yeem ua rau khaub ncaws hauv tshuaj tsuag-nplua nuj cov khoom noj muaj piam thaj. Lub viscosity ntawm cov ntsiab yog qhov tsim ntawm tsau kua txuas, cov saw tshuab sib txuas ntawm cov molecules, thiab electrostatic lub ntiajteb txawj nqus thiab khoom ua si. Lub ntsiab yog vim li cas rau cov nplaum ntawm phab ntsa hmoov nyob hauv cov ntaub ntawv qhuav yog cov khoom poob rau hauv cov zaub mov kom qhuav thiab kua qaub npuas. Thaum cov hmoov khaws cia rau lub sijhawm ntev dua, nws yuav qhuav ntawm phab ntsa.
Nws ua rau viscous
SThov Vajtswv Cov Khoom Noj Kom Qhuav Kom Qhuav Txhuas Hmoov Ua Khoom Siv Tshuaj Tsuag Tshuab Qhuav. Cov suab thaj muaj suab thaj tsawg heev (cov piam thaj ua ke (fructose, fructos) thiab organic acids (meny acid, matic acid, tartaric acid). Cov tshuaj molecular me me xws li cov dej nqus dej siab, thermoplasticity thiab qhov hloov chaw hloov pauv kev hloov pauv (TG) ua rau muaj teeb meem viscosity. Cov tsuag kom qhuav yog siab dua Tg20°C. Feem ntau ntawm cov feem xyuam ua cov khoom muag muag rau ntawm cov viscous nto, ua rau cov hmoov viscosity, thiab nws thiaj li tsim cov qauv muab tshuaj txhuam es tsis txhob ua hmoov. Lub siab molecular musility ntawm cov molecule no vim nws qhov kev hloov pauv Vitrification kub (tg), uas ua rau cov teeb meem viscosity (tg), uas ua rau cov teeb meem viscosity (tg) Cov yam ntxwv tseem ceeb ntawm cov iav hloov dua siab kub thiab Amorphous Theem hloov pauv kub. Qhov kev hloov pauv iav tshwm sim nyob rau hauv ib qho khoom tawv tawv, amorphous qab zib, uas tau ua rau muaj kev hloov pauv mus rau hauv cov roj hmab ua kua me me. Lub zog saum npoo thiab cov iav tawv muaj cov khoom qis thiab tsis ua raws li cov khoom muaj zog qis. Vim tias lub xeev ntawm cov iav rau roj hmab ferry (lossis kua), cov khoom siv tuaj yeem raug tsa, thiab kev sib cuam tshuam ntawm cov molecule thiab khoom nto tuaj yeem pib. Nyob rau hauv cov kev ua noj ua haus kom qhuav, cov khoom lag luam yog nyob rau hauv cov kua los yog nplaum, thiab cov kua / cov khoom noj tau tshem tawm cov tshuaj ntsuab (dej) ua iav. Yog tias cov khoom noj zaub mov tsis hloov los ntawm cov kub qhuav dua iav kub, cov khoom yuav tswj lub zog loj. Yog tias hom zaub mov no tau chwv nrog lub zog hluav taws xob zoo, nws yuav lo lossis ua raws li nws.
Kev tswj kev viscosity
Muaj ntau cov ntaub ntawv kev tshawb fawb thiab txheej txheem txheej txheem los txo viscosity. Cov txheej txheem yooj yim ntawm cov ntaub ntawv tshawb fawb suav nrog cov qauv hluav taws xob siab ntxiv kom muaj qhov kub thiab txias ntxiv rau cov hauv paus hniav ntxiv, thiab cov txheej txheem txheej txheem suav nrog cov phab ntsa thiab hauv qab ntawm cov tshuab kho tshuab.
Lub sij hawm Post: Febroo 22-2024