Ama-Antifoamers asetshenziselwa ukunciphisa ukungezwani kwamanzi, isisombululo nokumiswa, ukuvimbela ukwakheka kwegwebu, noma ukunciphisa igwebu elakhiwe ngesikhathi sokukhiqizwa kwezimboni. Ama-Antifoamers ajwayelekile ami kanje:

I. Amafutha Emvelo (okungukuthi Amafutha Kabhontshisi Wesoya, Amafutha ommbila, njll.)

Izinzuzo: iyatholakala, ingabizi futhi isebenziseka kalula;

Ukungalungi: kulula ukuwohloka futhi kukhuphule inani le-asidi uma ingagcinwa kahle.

II.I-Carbon Alcohol Ephezulu

I-high carbon alcohol iyi-molecule eqondile ene-hydrophobicity eqinile kanye ne-hydrophilicity ebuthakathaka, okuyi-antifoamer esebenzayo ohlelweni lwamanzi. Umphumela we-antifoaming wotshwala uhlobene nokuncibilika kwawo kanye nokusatshalaliswa kwesisombululo esinamagwebu. I-Alcohol ye-C7 ~ C9 iyi-Antifoamers ephumelela kakhulu. I-carbon High Alcohol ye-C12 ~ C22 ilungiswa ngama-emulsifiers afanelekile anosayizi wezinhlayiyana we-4 ~ 9μm, nge-emulsion yamanzi engu-20 ~ 50%, okungukuthi, i-defoamer ohlelweni lwamanzi. Amanye ama-ester nawo anomphumela we-antifoaming ku-penicillin fermentation, njenge-phenylethanol oleate ne-lauryl phenylacetate.

III.Ama-Antifoam we-Polyether

1. GP Antifoamers

Kwenziwe ngokungeza i-polymerization ye-propylene oxide, noma ingxube ye-ethylene oxide ne-propylene oxide, ene-glycerol njenge-ejenti yokuqala. Ine-hydrophilicity empofu kanye nokuncibilika okuphansi endaweni enegwebu, ngakho-ke ilungele ukusetshenziswa oketshezini oluncane lokuvutshelwa. Njengoba ikhono layo le-antifoaming liphakeme kunelo lokukhipha amagwebu, lifaneleka ukuba lifakwe endaweni eyisisekelo ukuze kuvinjwe inqubo yokugwaza kwayo yonke inqubo yokuvutshelwa.

2. GPE Antifoamers

I-ethylene oxide yengezwa ekugcineni kwe-polypropylene glycol chain link ye-GP Antifoamers ukuze yakhe i-polyoxyethylene oxypropylene glycerol ene-hydrophilic end. I-GPE Antifoamer ine-hydrophilicity enhle, ikhono eliqinile le-antifoaming, kodwa futhi inokuncibilika okukhulu okubangela isikhathi esifushane sokugcinwa komsebenzi we-antifoaming. Ngakho-ke, inomphumela omuhle ku-viscous fermentation broth.

3. Ama-GPEs Antifoamers

I-block copolymer enamaketanga e-hydrophobic emikhawulweni yomibili kanye namaketanga e-hydrophilic yakhiwa ngokuvala umkhawulo weketango le-GPE Antifoamers nge-hydrophobic stearate. Ama-athomu analesi sakhiwo athambekele ekuhlanganeni esixhumi esibonakalayo segesi-uketshezi, ngakho anomsebenzi oqinile ongaphezulu nokusebenza kahle okukhulu kokukhipha amagwebu.

IV.I-Poliether Modified Silicone

I-Polyether Modified Silicone Antifoamers wuhlobo olusha lwama-defoamers asebenza kahle kakhulu. Ibiza kakhulu ngezinzuzo zokuhlakazeka okuhle, ikhono eliqinile lokuvimbela igwebu, ukuzinza, okungewona ubuthi futhi okungenangozi, ukuguquguquka okuphansi kanye nekhono eliqinile le-Antifoamers. Ngokuya ngezindlela ezahlukene zokuxhuma zangaphakathi, ingahlukaniswa izigaba ezimbili ezilandelayo:

1. I-copolymer ene--Si-OC- bond elungiswe nge-asidi njengesisusa. Le defoamer kulula ukwenza i-hydrolysis futhi inozinzo oluphansi. Uma i-amine buffer ikhona, ingagcinwa isikhathi eside. Kodwa ngenxa yentengo yayo ephansi, amandla okuthuthukiswa asobala kakhulu.

2. I-copolymer eboshwe yi-si-c-bond inesakhiwo esizinzile futhi ingagcinwa isikhathi esingaphezu kweminyaka emibili ngaphansi kwezimo ezivaliwe. Kodwa-ke, ngenxa yokusetshenziswa kweplatinamu ebizayo njenge-catalyst enqubweni yokukhiqiza, izindleko zokukhiqiza zalolu hlobo lwama-antifoamers ziphezulu, ngakho-ke ayikasetshenziswa kabanzi.

V. Organic Silicon Antifoamer

…isahluko esilandelayo.