Hnub Kawg:17,JAN,2022

Siliconedefoameryog dawb viscous emulsion.Nws tau siv ntau yam kev lag luam txij li xyoo 1960, tab sis kev loj hlob thiab kev loj hlob sai tau pib thaum xyoo 1980s.Raws li organosilicondefoamer, nws daim ntawv thov teb kuj yog dav heev, attracting ntau thiab ntau xim los ntawm txhua qhov chaw ntawm lub neej.Nyob rau hauv cov tshuaj, ntawv, txheej, zaub mov, textile, kws thiab lwm yam sectors, siliconedefoameryog ib qho indispensable additive nyob rau hauv cov txheej txheem ntau lawm.Nws tuaj yeem tsis tsuas yog tshem tawm cov npuas dej ntawm cov txheej txheem nruab nrab hauv cov txheej txheem tsim khoom, yog li txhim kho kev pom, Kev sib cais, gasification, thiab kua dej los ntawm kev ntxuav, tshem tawm, distillation, evaporation, lub cev qhuav dej, ziab thiab lwm yam txheej txheem thev naus laus zis kom ntseeg tau tias cov khoom siv hluav taws xob zoo. muaj peev xwm ntawm ntau yam khoom cia thiab ua cov ntim khoom.

Qhov zoo ntawmsilicone defoamers:
1. Kev siv ntau yam: vim yog cov qauv tshuaj tshwj xeeb ntawm cov roj silicone, nws tsis sib haum nrog cov dej lossis cov khoom muaj cov polar pawg, tsis yog cov hydrocarbons lossis cov khoom siv organic uas muaj pawg hydrocarbon.Vim yog insolubility ntawm silicone roj rau ntau yam khoom, nws muaj ntau yam kev siv.Nws tuaj yeem siv rau defoaming hauv cov tshuab dej thiab hauv cov tshuab roj.
2. Tsis tshua muaj qhov nro: Lub peev xwm ntawm cov roj silicone feem ntau yog 20-21 dyne / cm, uas yog me dua cov dej (72 dyne / cm) thiab cov dej ua npuas dej dav dav, thiab muaj kev ua haujlwm zoo defoaming.
3. Zoo thermal stability: Siv cov khoom siv simethicone ua piv txwv, nws tuaj yeem tiv taus 150 ° C rau lub sijhawm ntev thiab 300 ° C rau lub sijhawm luv luv, thiab nws cov nyiaj Si-O yuav tsis decompose.Qhov no xyuas kom meej tias covsilicone defoamertuaj yeem siv dav hauv qhov kub thiab txias.
4. Kev ruaj ntseg tshuaj zoo: Txij li Si-O daim ntawv cog lus yog qhov ruaj khov, cov tshuaj lom neeg ruaj khov ntawm cov roj silicone yog siab heev, thiab nws nyuaj rau chemically react nrog lwm yam tshuaj.Yog li ntawd, tsuav yog lub formulation yog tsim nyog,silicone defoamersraug tso cai siv rau hauv cov tshuab uas muaj cov kua qaub, alkalis, thiab ntsev.
5. Physiologically inert: Silicone roj tau raug pov thawj tias tsis muaj tshuaj lom rau tib neeg thiab tsiaj txhu, thiab nws cov koob tshuaj ib nrab yog ntau dua 34 g / kg.Yog li ntawd,silicone defoamers(nrog rau cov emulsifiers uas tsis yog-tshuaj lom, thiab lwm yam) tuaj yeem siv nyab xeeb hauv cov khoom noj, kev kho mob, kev lag luam tshuaj thiab tshuaj pleev ib ce.
6. Muaj zog defoaming zog:Silicone defoamertuaj yeem tsis tsuas yog ua kom zoo ua npuas dej uas tau tsim tawm, tab sis kuj tuaj yeem cuam tshuam cov npuas dej thiab tiv thaiv kev tsim ua npuas ncauj.Nws siv tsawg heev, tsuav yog ntxiv ib feem ntawm ib lab (1ppm) ntawm qhov hnyav ntawm qhov nruab nrab foaming, nws tuaj yeem tsim cov nyhuv defoaming.Nws feem ntau siv ntau yog 1 txog 100 ppm.Tsis tsuas yog tus nqi qis xwb, tab sis kuj tsis ua rau cov khoom defoamed.

Qhov tsis zoo ntawmsilicone defoamers:
ib.Polysiloxane nyuaj rau disperse: Polysiloxane yog ib qho nyuaj rau yaj hauv dej, uas cuam tshuam nws dispersion hauv dej system.Ib tus neeg sawv cev dispersing yuav tsum tau ntxiv.Yog tias tus neeg sawv cev dispersing ntxiv, emulsion yuav ruaj khov thiab cov nyhuv defoaming yuav hloov.Hmoov tsis zoo, nws yog ib qho tsim nyog yuav tsum siv cov emulsifier tsawg dua los ua kom cov nyhuv defoaming zoo thiab cov emulsion ruaj khov.
b.Silicone yog roj-soluble, uas txo nws cov nyhuv defoaming nyob rau hauv cov roj system.
c.Lub sij hawm ntev kub tsis kam thiab tsis zoo alkali tsis kam.