Mabapi le li-Defoamers (Antifoam)

Ho na le mefuta e mengata eaLi-defoamers'me li sebelisoa haholo.Mokhoa oa "khatello ea foam" le "foam breaking" ea defoamer ke: ha defoamer e kenngoa tsamaisong, limolek'hule tsa eona li aroloa ka mokhoa o sa reroang holim'a metsi, li thibela ho thehoa ha filimi ea elastic, ke hore, ho felisa. moloko oa lekoeba.Ha tsamaiso e hlahisa foam e ngata, eketsa defoamer, limolek'hule tsa eona hang-hang li hasana holim'a foam, li hasana ka potlako, li etsa lera le lesesaane le lesesaane le habeli, le ntse le tsoela pele ho hasana, le phunyeletse, 'me le hlasela ka lihlopha, kahoo le nkela lerako le tšesaane sebaka. ea filimi ea pele ea foam.Ka lebaka la tsitsipano e tlase ea holim'a metsi, e phallela ho mokelikeli o nang le tsitsipano e phahameng ea holim'a metsi e hlahisang foam, e le hore limolek'hule tsa defoamer tse nang le khatello e tlaase ea holim'a metsi li tsoele pele ho hasana le ho kenella pakeng tsa sebopeho sa khase ea metsi, e leng se etsang hore lebota la filimi le be mosesaane ka potlako, foam e boetse e angoa ke sebaka se potolohileng.Lera la filimi le nang le tsitsipano e phahameng le hula ka matla, e le hore khatello ea kelello e pota-potileng foam e se ke ea leka-lekana, e lebisang ho "foam" ea eona.Limolek'hule tsa defoamer tse sa tsitsang tsamaisong li tla boela li kene ka holim'a filimi e 'ngoe ea foam, joalo-joalo, foam eohle e tla timetsoa ka ho feletseng.

Mokhoa oa ho khetha e nepahetsengAntifoam

Ho hlahisa le ho hahoa ha litlolo ho tla hlahisa li-bubble ho ea ka likhato tse sa tšoaneng.Moloko oa li-bubble o sitisa tsoelo-pele e ntle ea tlhahiso le kaho, 'me ka nako e ts'oanang e tlisa mefokolo ho filimi e phethiloeng ea ho roala.Khetho e nepahetseng ea defoamer e loketseng e ka netefatsa tsoelo-pele e tloaelehileng ea tlhahiso ea ho roala le ho haha.

Mosebetsi oa defoamer: senya filimi ea metsi holim'a bubble, thibela ho thehoa ha bubble le ho khothalletsa ho putlama ha bubble.Defoamer e sebelisoa bakeng sa li-bubble tse kholo, 'me microfoam e hloka ho sebelisoa hammoho le ho senya le ho senya.

Likarolo tsa Defoamer: Defoamer ha e qhibilihe bohareng, empa e ka kena le ho hasana bohareng ka sebopeho sa li-microdroplets.Bophara bo sebetsang ka ho fetisisa ba li-microdroplets tsa defoamer bo lekana le botenya ba lerako la foam.

Sebopeho sa Defoamer:Li-defoamersbakeng sa liphahlo tsa meralo ea metsi li arotsoe ka mefuta e seng ea silicon le e nang le silicon.TloaelehilengLi-defoamersli entsoe ka likarolo tse latelang:

Ntho e sebetsang: E ​​sebetsa joalo ka ntho e pshatlang lekoeba le ho tlosa lekoba le nang le tsitsipano e tlase.Baemeli ba kenyelletsa oli ea liphoofolo le meroho, silika ea hydrophobic, joala bo phahameng, joalo-joalo.

Diffusion agent: Emulsifier e kolobisang ho etsa bonnete ba hore marotholi a manyane a thethefatsang a hasana le ho ikopanya le filimi ea bubble le ho hasana.Ho na le non(octyl) phenol polyoxyethylene ether, sesepa letsoai joalo-joalo.

Carrier: E thusa ntho e sebetsang ho kopana le tsamaiso ea ho phophoma, 'me ho bonolo ho hasana ka har'a tsamaiso ea ho phophoma.Ho kopanya tsena tse peli, e na le tsitsipano e tlase holimo, e thusa ho hatella foam, 'me e ka fokotsa litšenyehelo.

Maemo a mabeli a tlameha ho finyelloa bakeng sa defoaming: ntlha ea ho kenella: E = γ1 + γ12-γ3 > 0, ho netefatsa hore defoamer e kenella leboteng la foam;spreading factor S=γ1-v12-γ3 >0, ho etsa bonnete ba hore marotholi a defoamer Diffusion a hasana mecheng ea litaba ea foam.

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