Ma antifoamers amagwiritsidwa ntchito kuchepetsa kuthamanga kwa madzi, yankho ndi kuyimitsidwa, kuteteza kupangika kwa thovu, kapena kuchepetsa thovu lomwe limapangidwa panthawi yopanga mafakitale. Common Antifoamers ndi awa:

I. Mafuta Achilengedwe (mwachitsanzo Mafuta a Soya, Mafuta a Chimanga, etc.)

Ubwino: zopezeka, zotsika mtengo komanso zosavuta kugwiritsa ntchito;

Zoyipa zake: ndizosavuta kuwonongeka ndikuwonjezera mtengo wa asidi ngati sunasungidwe bwino.

II.Mowa Wapamwamba wa Carbon

Mowa wambiri wa kaboni ndi molekyu yofananira yokhala ndi hydrophobicity yamphamvu komanso hydrophilicity yofooka, yomwe ndi antifoamer yogwira bwino m'madzi. Mphamvu ya antifoaming ya mowa imakhudzana ndi kusungunuka kwake ndi kufalikira mu njira yotulutsa thovu. Mowa wa C7 ~ C9 ndiye Antifoamers othandiza kwambiri. Mpweya wa carbon Mowa wa C12 ~ C22 umakonzedwa ndi emulsifiers yoyenera ndi kukula kwa tinthu 4 ~ 9μm, ndi 20 ~ 50% emulsion yamadzi, ndiko kuti, defoamer m'madzi. Ma esters ena amakhalanso ndi antifoaming effect mu penicillin fermentation, monga phenylethanol oleate ndi lauryl phenylacetate.

III.Ma Antifoam a Polyether

1. GP Antifoamers

Amapangidwa powonjezera ma polymerization a propylene oxide, kapena osakaniza a ethylene oxide ndi propylene oxide, ndi glycerol ngati choyambira. Ili ndi hydrophilicity yotsika komanso kusungunuka kochepa mu sing'anga yotulutsa thobvu, kotero ndiyoyenera kugwiritsidwa ntchito mumadzimadzi owonda kwambiri. Popeza luso lake loletsa kutulutsa thobvu ndilapamwamba kuposa la kuchotsa thovu, ndiloyenera kuwonjezeredwa mu basal medium kuti aletse kuchita thovu panjira yonse yowotchera.

2. GPE Antifoamers

Ethylene okusayidi anawonjezera pa mapeto a polypropylene glycol unyolo ulalo wa GP Antifoamers kupanga polyoxyethylene oxypropylene glycerol ndi hydrophilic mapeto. GPE Antifoamer ili ndi hydrophilicity yabwino, mphamvu yoletsa kutulutsa thovu, komanso imakhala ndi kusungunuka kwakukulu komwe kumayambitsa nthawi yochepa yokonza ntchito yoletsa kutulutsa thovu. Choncho, zimakhala ndi zotsatira zabwino mu viscous nayonso mphamvu msuzi.

3. GPEs Antifoamers

Chophimba chotchinga chokhala ndi unyolo wa hydrophobic kumapeto onse ndi unyolo wa hydrophilic chimapangidwa ndikusindikiza kumapeto kwa unyolo wa GPE Antifoamers ndi hydrophobic stearate. Mamolekyu omwe ali ndi kapangidwe kameneka kamakonda kusonkhana pa mawonekedwe amadzi a gasi, motero amakhala ndi zochitika zamphamvu zapamtunda komanso kuchita bwino kwambiri.

IV.Polyether Modified Silicone

Ma Polyether Modified Silicone Antifoamers ndi mtundu watsopano wa zofooketsa zamphamvu kwambiri. Ndiwotsika mtengo ndi ubwino wa kubalalitsidwa kwabwino, mphamvu yamphamvu yoletsa thovu, kukhazikika, yopanda poizoni komanso yopanda vuto, kusakhazikika kochepa komanso kuthekera kolimba kwa Antifoamers. Malinga ndi mitundu yosiyanasiyana yolumikizira mkati, imatha kugawidwa m'magulu awiri awa:

1. Copolymer yokhala ndi -Si-OC- bond yokonzedwa ndi asidi ngati chothandizira. Defoamer iyi ndiyosavuta ku hydrolysis ndipo imakhala yosakhazikika. Ngati chitetezo cha amine chilipo, chikhoza kusungidwa kwa nthawi yayitali. Koma chifukwa cha mtengo wake wotsika, kuthekera kwachitukuko kumawonekera kwambiri.

2. Copolymer yomangidwa ndi - si-c-bond ili ndi dongosolo lokhazikika ndipo ikhoza kusungidwa kwa zaka zoposa ziwiri pansi pa zinthu zotsekedwa. Komabe, chifukwa chogwiritsa ntchito platinamu yamtengo wapatali monga chothandizira pakupanga, mtengo wamtengo wapatali wamtunduwu wa antifoamers ndi wokwera, choncho sunagwiritsidwe ntchito kwambiri.

V. Organic Silicon Antifoamer

…mutu wotsatira.