Antifoamers tau siv los txo cov dej nro, kev daws thiab raug ncua, tiv thaiv ua npuas tsim, tsim cov npuas dej tsim kev lag luam. Cov antifoamers muaj raws li hauv qab no:
I. Ntuj Roj (piv txwv li cov roj taum taum, pob kws cov roj, thiab lwm yam.)
Cov txiaj ntsig: muaj, raug nqi thiab siv yooj yim.
Qhov tsis zoo: Nws yog ib qho yooj yim rau kev puas tsuaj thiab nce cov acid muaj txiaj ntsig yog tias tsis khaws cia zoo.
Ii. Cov pa cawv ntau
Cov dej cawv ntau yog txoj kab tawm ntawm hydrophuicity thiab tsis muaj zog hydrophilicity, uas yog cov tshuaj tiv thaiv zoo hauv dej. Cov antifoaming cuam tshuam ntawm cawv muaj feem xyuam rau nws solubility thiab diffusion nyob rau hauv foaming daws. Cawv C7 ~ C9 yog cov tshuaj tiv thaiv zoo tshaj plaws. High carbon qab dej cawv ntawm C12 ~ C22 tau npaj nrog emulsifiers tsim nyog nrog rau particle loj ntawm 4 ~ 50% dej emulsion, uas yog, defosamer hauv qhov system dej. Qee tus neeg estres kuj muaj antifoos ua rau penicillin fermentation, xws li Phenyylethanol Alryryl Penyylacetate.
III. Polyether Antifoamers
1. GP Antifoamers
Ua los ntawm ntxiv polymerization ntawm propylene oxide, lossis kev sib xyaw ntawm ethylene oxide thiab propylene oxide, nrog glycerol ua tus neeg sawv cev pib. Nws muaj tsis zoo hydrophilicity thiab qis solubility hauv foaming nruab nrab, yog li nws yog qhov haum rau siv hauv cov kua roj ua kua. Txij li thaum nws antifoaming muaj peev xwm zoo dua rau tias ntawm defoaming, nws yog qhov haum rau hauv qhov nruab nrab ntawm cov txheej txheem foaming ntawm cov txheej txheem fermentation.
2. GPE Antifoamers
Ethylene oxide yog ntxiv rau ntawm lub polypropylene glycol saw txuas ntawm GP Antifoamers los ua polyoxyylene oxypropylene glycerol nrog hydrophilic kawg. GPE cov tub rog muaj zoo hydrophilicity, muaj zog tiv thaiv kev muaj peev xwm, tab sis kuj muaj solubility loj uas ua rau kev ua haujlwm luv luv ntawm kev ua haujlwm luv luv ntawm kev ua haujlwm luv luv. Yog li ntawd, nws muaj cov txiaj ntsig zoo nyob rau hauv viscous fermentation broth.
3. GPES Antifoamers
Ib ntu copolymer nrog hydrophobic cov saw ntawm ob qho kawg thiab hydrophilic chains yog tsim los ntawm kev sib khi ntawm GPE antifoamers nrog hydrophobic stearate. Cov lwg me me nrog cov qauv no zoo li sib sau ua ke ntawm cov kua roj-kua interface, yog li lawv muaj cov haujlwm sib luag thiab kev tiv thaiv zoo.
IV. Polyether Hloov Silicone
Polyether hloov silicone antifoamers yog hom tshiab ntawm kev ua siab loj ntawm kev ua haujlwm siab. Nws yog tus nqi - ua tau zoo nrog qhov zoo ntawm cov kev tawg ua kom zoo, muaj zog ua npuas ncauj, tsis muaj kuab lom thiab muaj zog tiv thaiv thiab muaj zog tiv thaiv cov tshuaj tiv thaiv. Raws li cov qauv sab hauv kev sib txuas, nws tuaj yeem faib ua ob pawg hauv qab no:
1. Copolymer nrog -si-off npaj nrog acid ua catalyst. Qhov no defoamer yog ib qho yooj yim rau hydrolysis thiab muaj kev ruaj khov tsis zoo. Yog tias amine tsis yog tam sim no, nws tuaj yeem khaws cia rau lub sijhawm ntev dua. Tab sis vim yog nws tus nqi qis, kev txhim kho muaj peev xwm pom tseeb.
2. Cov copolymer raug cog lus los ntawm - SI-C-C-C-C-C-C-sib luag muaj cov qauv ruaj khov thiab tuaj yeem khaws cia ntau tshaj ob xyoos nyob rau hauv cov xwm txheej kaw. Txawm li cas los xij, vim kev siv cov platinum kim ntawm cov txheej txheem ntau lawm, cov nqi tsim khoom ntawm cov antifoamers yog siab, yog li nws tsis tau siv dav.
V. Organic Silicon Antifoamer
Tshooj lus twg.
Lub Sijhawm Post: Nov-19-2021