Ama-antifoam asetshenziselwa ukunciphisa ukucindezeleka kwamanzi, isixazululo kanye nokumiswa, ukuvimbela ukwakheka kwe-foam, noma ukunciphisa i-foam eyakheka ngesikhathi sokukhiqizwa kwezimboni. Ama-antifoam avamile alandelayo:

I. Amafutha Emvelo (okungukuthi Amafutha Esoya, Amafutha Ommbila, njll.)

Izinzuzo: iyatholakala, ingabizi kakhulu futhi kulula ukuyisebenzisa;

Okubi: kulula ukubola nokwandisa inani le-asidi uma kungagcinwanga kahle.

II.Utshwala Obunekhabhoni Eningi

I-alcohol ephezulu yekhabhoni iyi-molecule eqondile ene-hydrophobicity enamandla kanye ne-hydrophilicity ebuthakathaka, okuyi-antifoamer ephumelelayo ohlelweni lwamanzi. Umphumela we-antifoaming wotshwala uhlobene nokuncibilika kwawo kanye nokusabalala kwawo esixazululweni se-foaming. I-Alcohol ye-C7 ~ C9 iyi-Antifoamers ephumelela kakhulu. I-Alcohol ephezulu yekhabhoni ye-C12 ~ C22 ilungiswa ngama-emulsifier afanele anosayizi wezinhlayiya ongu-4 ~ 9μm, one-emulsion yamanzi engu-20~50%, okungukuthi, i-defoamer ohlelweni lwamanzi. Amanye ama-ester nawo anomphumela we-antifoaming ekuvuthweni kwe-penicillin, njenge-phenylethanol oleate kanye ne-lauryl phenylacetate.

III.Ama-Antifoam e-Polyether

1. Ama-GP Antifoamers

Kwenziwe ngokufaka i-polymerization ye-propylene oxide, noma ingxube ye-ethylene oxide ne-propylene oxide, kanye ne-glycerol njenge-ejenti yokuqala. Inobuthaka obuphansi bokunamathela kwamanzi kanye nokuncibilika okuphansi endaweni yokufutha, ngakho-ke kufanelekile ukusetshenziswa kuketshezi lokufutha oluncane. Njengoba ikhono layo lokulwa nokufutha liphakeme kunelokufutha, kufanelekile ukungezwa endaweni eyisisekelo ukuze kuvinjelwe inqubo yokufutha yonke inqubo yokufutha.

2. Ama-GPE Antifoamers

I-ethylene oxide ingezwa ekugcineni kwesixhumanisi se-polypropylene glycol chain se-GP Antifoamers ukuze kwakheke i-polyoxyethylene oxypropylene glycerol ene-hydrophilic end. I-GPE Antifoamer inamandla okumelana nokungcola, ikhono eliqinile lokuvimbela ukungcola, kodwa futhi inokuncibilika okukhulu okubangela isikhathi esifushane sokugcinwa komsebenzi wokuvimbela ukungcola. Ngakho-ke, inomphumela omuhle kumhluzi wokubilisa oqinile.

3. Ama-GPE Antifoamers

I-block copolymer enezintambo ezigobhozayo emaphethelweni womabili kanye nezintambo ezigobhozayo kwakhiwa ngokuvala ukuphela kwentambo ye-GPE Antifoamers nge-hydrophobic stearate. Ama-molecule analesi sakhiwo avame ukuhlangana endaweni ehlangana negesi noketshezi, ngakho-ke anomsebenzi oqinile wobuso kanye nokusebenza kahle okukhulu kokuhlambulula.

IV.I-Silicone Eguquliwe ye-Polyether

Ama-Antifoamer e-Silicone aguquliwe e-Polyether uhlobo olusha lwama-defoamer asebenza kahle kakhulu. Ayabiza kahle ngezinzuzo zokusabalala okuhle, ikhono eliqinile lokuvimbela i-foam, ukuzinza, awanabo ubuthi futhi awanangozi, aphansi ukuguquguquka kanye nekhono eliqinile lama-Antifoamer. Ngokwezindlela ezahlukene zokuxhuma zangaphakathi, ingahlukaniswa ngezigaba ezimbili ezilandelayo:

1. I-Copolymer enesibopho se-Si-OC esilungiselelwe nge-asidi njenge-catalyst. Le defoamer kulula ukuyi-hydrolysis futhi ayinakho ukuzinza okuhle. Uma kukhona i-amine buffer, ingagcinwa isikhathi eside. Kodwa ngenxa yentengo yayo ephansi, amandla okuthuthukiswa asobala kakhulu.

2. I-copolymer eboshwe yi-si-c-bond inesakhiwo esizinzile futhi ingagcinwa iminyaka engaphezu kwemibili ngaphansi kwezimo ezivaliwe. Kodwa-ke, ngenxa yokusetshenziswa kwe-platinum ebizayo njenge-catalyst enqubweni yokukhiqiza, izindleko zokukhiqiza zalolu hlobo lwe-antifoamers ziphezulu, ngakho-ke ayikasetshenziswa kabanzi.

V. Isithambisi Sokulwa Nokugqwala Kwe-Silicon Engokwemvelo

...isahluko esilandelayo.