I. Natural Oil (xws li Soybean Oil, Corn Oil, etc.)
II. High Carbon Cawv
III. Polyether Antifoamers
IV. Polyether Hloov Silicone
...Cov tshooj dhau los kom paub meej.
V. Organic Silicon Antifoamer
Polydimethylsiloxane, tseem hu ua silicone roj, yog lub ntsiab ntawm silicone defoamer. Piv nrog cov dej thiab cov roj uas nquag muaj, nws cov npoo av me me yog qhov tsim nyog, uas haum rau cov khoom ua npuas dej thiab cov roj ua npuas. Silicone roj muaj kev ua haujlwm siab, tsis muaj solubility, ruaj khov khoom, lub teeb daim ntawv thov ntau yam, tsis tshua muaj volatility, tsis muaj tshuaj lom, thiab muaj peev xwm defoaming. Qhov tsis zoo yog ua npuas ncauj ua haujlwm tsis zoo.
1. Khoom Antifoamer
Khoom Antifoamer muaj cov yam ntxwv ntawm kev ruaj ntseg zoo, txheej txheem yooj yim, kev thauj mus los yooj yim thiab siv tau yooj yim. Nws yog tsim nyog rau ob theem roj thiab dej theem, thiab qhov nruab nrab dispersion hom kuj tseem ceeb. Nws yog dav siv nyob rau hauv lub tshav pob uas tsis muaj npuas los yog tsis ua npuas ncauj ntxhua hmoov.
2. Emulsion Antifoamer
Cov roj silicone hauv emulsion defoamer muaj qhov nro ntau dua, thiab cov emulsification coefficient loj dhau. Thaum cov emulsifier raug xaiv tsis raug, nws yuav ua rau defoaming tus neeg sawv cev rau txheej thiab metamorphic nyob rau hauv ib lub sij hawm luv luv. Kev ruaj ntseg ntawm emulsion yog qhov tseem ceeb heev rau qhov zoo ntawm tus neeg saib xyuas defoaming. Yog li ntawd, kev npaj ntawm emulsion hom silicone defoamer tsom rau kev xaiv ntawm emulsifier. Nyob rau tib lub sijhawm, emulsion defoamer muaj ntau npaum li cas hauv silicone defoamer nrog cov yam ntxwv ntawm tus nqi qis, daim ntawv thov dav dav, pom tseeb defoaming nyhuv, thiab lwm yam. Nrog rau kev nce qib ntawm kev tsim technology, emulsion defoamer yuav txhim kho zoo heev.
3. Tshuaj Antifoamer
Nws yog ib qho kev daws teeb meem los ntawm dissolving silicone roj nyob rau hauv hnyav. Nws lub hauv paus ntsiab lus defoaming yog tias cov roj silicone cov khoom yog nqa los ntawm cov kuab tshuaj thiab dispersed hauv foaming tov. Nyob rau hauv cov txheej txheem no, silicone roj yuav maj mam condense rau hauv tee dej kom tiav defoaming. Silicone roj yaj nyob rau hauv non-aqueous organic tov system, xws li polychloroethane, toluene, thiab lwm yam, yuav siv tau raws li cov roj tov defoaming.
4. Roj Antifoamer
Lub ntsiab tseem ceeb ntawm cov roj defoamer yog dimethyl silicone roj. Ntshiab dimethyl silicone roj tsis muaj cov nyhuv defoaming thiab yuav tsum tau emulsified. Qhov nro ntawm emulsified silicone txo qis sai, thiab ib qho me me tuaj yeem ua kom muaj zog ua npuas ncauj tawg thiab inhibition. Thaum cov roj silicone tov nrog ib qho kev faib ua feem ntawm hydrophobically kho silica pab, cov roj compound defoamer tuaj yeem tsim. Silicon dioxide yog siv los ua cov muab tub lim, vim tias muaj ntau ntau ntawm hydroxyl pawg ntawm nws qhov chaw tuaj yeem txhim kho lub zog tawg ntawm cov roj silicone hauv cov txheej txheem ua npuas dej, ua kom muaj kev ruaj ntseg ntawm emulsion, thiab pom tseeb txhim kho cov cuab yeej defoaming ntawm silicone defoamer.
Vim tias cov roj silicone yog lipophilic, silicone defoamer muaj cov nyhuv defoaming zoo heev ntawm cov roj-soluble tov. Txawm li cas los xij, cov ntsiab lus no yuav tsum tau them sai sai rau thaum siv silicone defoamer:
● Tsawg viscosity silicone defoamer muaj cov nyhuv defoaming zoo, tab sis nws qhov persistence tsis zoo; High viscosity silicone defoamer muaj qeeb defoaming nyhuv tab sis zoo persistence.
● Yog tias cov viscosity ntawm cov tshuaj foaming qis dua, nws yog qhov zoo dua los xaiv cov silicone defoamer nrog viscosity ntau dua. Ntawm qhov tsis sib xws, qhov siab dua qhov viscosity ntawm cov tshuaj foaming yog, nws yog qhov zoo dua los xaiv cov silicone defoamer nrog qis viscosity.
● Qhov hnyav molecular ntawm oily silicone defoamer muaj qee yam cuam tshuam rau nws cov nyhuv defoaming.
● Lub defoamer nrog qhov hnyav molecular yog ib qho yooj yim rau disperse thiab yaj, tab sis tsis muaj persistence. Ntawm qhov tsis sib xws, defoaming kev ua tau zoo ntawm siab molecular hnyav defoamer tsis zoo, thiab emulsification yog qhov nyuaj, tab sis cov solubility tsis zoo thiab cov kav ntev yog qhov zoo.
Post lub sij hawm: Nov-19-2021