Silicone Antifoam yog dab tsi?

Cov tshuaj silicone antifoams feem ntau yog ua los ntawm cov silica hydrophobized uas tau tawg zoo hauv cov kua silicone. Cov tshuaj sib xyaw ua ke ces raug stabilized rau hauv cov dej lossis cov roj emulsion. Cov tshuaj antifoams no muaj txiaj ntsig zoo vim lawv cov tshuaj lom neeg tsis muaj zog, muaj zog txawm tias nyob rau hauv qhov tsawg concentration, thiab muaj peev xwm kis tau hla ib daim ntawv ua npuas ncauj. Yog tias xav tau, lawv tuaj yeem ua ke nrog lwm cov khoom khov thiab kua hydrophobic kom txhim kho lawv cov yam ntxwv defoaming.

Cov tshuaj silicone tiv thaiv ua npuas dej feem ntau yog cov tshuaj zoo tshaj plaws. Lawv ua haujlwm los ntawm kev rhuav tshem qhov nro ntawm qhov chaw thiab ua rau cov npuas dej tsis ruaj khov, ua rau lawv tawg. Qhov kev ua no pab tshem tawm cov npuas dej uas twb muaj lawm sai sai thiab tseem pab tiv thaiv kom tsis txhob muaj npuas dej.

Qhov zoo ntawm cov silicone defoamer

• Ntau yam kev siv

Vim yog cov qauv tshuaj lom neeg tshwj xeeb ntawm cov roj silicone, nws tsis sib haum nrog dej lossis cov khoom uas muaj cov pab pawg polar, thiab tsis sib haum nrog cov hydrocarbons lossis cov khoom organic uas muaj cov pab pawg hydrocarbon. Vim tias cov roj silicone tsis yaj hauv ntau yam khoom, silicone defoamer muaj ntau yam kev siv. Nws tuaj yeem siv tsis yog rau cov dej defoaming xwb, tab sis kuj rau cov roj defoaming.

• Kev nruj ntawm qhov chaw qis

Qhov nro ntawm cov roj silicone feem ntau yog 20-21 dynes / cm thiab me dua qhov nro ntawm cov dej (72 dynes / cm) thiab cov kua dej ua npuas dav dav, uas txhim kho cov nyhuv tswj kev ua npuas ncauj.

• Kev ruaj khov zoo thaum tshav kub kub

Piv txwv li, siv cov roj dimethyl silicone uas siv ntau, nws qhov kub thiab txias ntev tuaj yeem ncav cuag 150 ° C, thiab nws qhov kub thiab txias luv luv tuaj yeem ncav cuag ntau dua 300 ° C, ua kom ntseeg tau tias cov neeg sawv cev silicone defoaming tuaj yeem siv rau hauv qhov kub thiab txias dav.

• Kev ruaj khov tshuaj zoo

Cov roj silicone muaj kev ruaj khov tshuaj lom neeg siab thiab nyuaj rau cuam tshuam nrog lwm yam tshuaj lom neeg. Yog li ntawd, tsuav yog kev npaj tsim nyog, cov neeg sawv cev silicone defoaming raug tso cai siv rau hauv cov kab ke uas muaj cov kua qaub, alkalis, thiab ntsev.

• Kev tsis txav ntawm lub cev

Cov roj silicone tau ua pov thawj tias tsis muaj tshuaj lom rau tib neeg thiab tsiaj txhu. Yog li ntawd, cov tshuaj silicone defoamers (nrog cov emulsifiers tsis muaj tshuaj lom, thiab lwm yam) tuaj yeem siv tau zoo hauv kev siv pulp thiab ntawv, kev ua zaub mov, kev kho mob, tshuaj thiab kev siv tshuaj pleev ib ce.

• Muaj zog ua npuas ncauj

Cov tshuaj silicone defoamers tsis yog tsuas yog ua tau zoo rau kev rhuav tshem cov npuas dej uas tsis xav tau xwb, tab sis kuj tseem tiv thaiv cov npuas dej thiab tiv thaiv kev tsim cov npuas dej. Cov tshuaj no me me heev, thiab tsuas yog ntxiv ib feem lab (1 ppm lossis 1 g/m3) ntawm qhov hnyav ntawm cov khoom siv ua npuas dej kom tsim tau cov nyhuv defoaming. Nws qhov ntau thiab tsawg yog 1 txog 100 ppm. Tsis yog tus nqi qis xwb, tab sis nws yuav tsis ua rau cov khoom siv defoaming qias neeg.

Cov silicone antifoams muaj nqis rau lawv qhov ruaj khov, sib xws nrog ntau yam tshuaj, thiab ua haujlwm tau zoo hauv qhov tsawg. Txawm li cas los xij, nws yog ib qho tseem ceeb kom ntseeg tau tias lawv ua raws li cov qauv kev cai lij choj thiab tsim nyog rau daim ntawv thov tshwj xeeb kom tsis txhob muaj kev cuam tshuam tsis zoo rau qhov zoo ntawm cov khoom lossis ib puag ncig.