Izithinteli-foam zisetyenziselwa ukunciphisa uxinzelelo lomphezulu wamanzi, isicombululo kunye nokumiswa, ukuthintela ukwakheka kwefoam, okanye ukunciphisa ukwakheka kwefoam ngexesha lemveliso yemizi-mveliso. Izithinteli-foam eziqhelekileyo zezi zilandelayo:

I. Ioyile yendalo (umz. Ioyile yesoya, ioyile yombona, njl.njl.)

Iingenelo: ziyafumaneka, zingabizi kakhulu kwaye kulula ukuzisebenzisa;

Iingxaki: kulula ukubola nokunyusa ixabiso le-asidi ukuba ayigcinwanga kakuhle.

II.Utywala obuphezulu beCarbon

I-alcohol ephezulu yekhabhoni yimolekyuli ethe ngqo ene-hydrophobicity enamandla kunye ne-hydrophilicity ebuthathaka, eyi-antifoamer esebenzayo kwinkqubo yamanzi. Isiphumo sokulwa ne-foaming sotywala sinxulumene nokunyibilika kwayo kunye nokusasazwa kwayo kwisisombululo se-foaming. I-Alcohol ye-C7 ~ C9 yeyona Antifoamers isebenzayo. I-Alcohol ephezulu yekhabhoni ye-C12 ~ C22 ilungiswa ngee-emulsifiers ezifanelekileyo ezinobukhulu beesuntswana ze-4 ~ 9μm, kunye ne-20 ~ 50% yamanzi emulsion, oko kukuthi, i-defoamer kwinkqubo yamanzi. Ezinye ii-esters zikwanayo nefuthe lokulwa ne-foaming kwi-penicillin fermentation, njenge-phenylethanol oleate kunye ne-lauryl phenylacetate.

III.Izinto zokuthintela amagwebu zePolyether

1. Ii-GP Antifoamers

Yenziwe ngokongeza i-polymerization ye-propylene oxide, okanye umxube we-ethylene oxide kunye ne-propylene oxide, kunye ne-glycerol njengesixhobo sokuqala. Ayinamanzi acocekileyo kwaye ayinyibiliki kakuhle kwindawo yokufutha, ngoko ke ifanelekile ukusetyenziswa kulwelo olubhityileyo lokufutha. Ekubeni amandla ayo okulwa nokufutha egqitha kakhulu kuneyokufutha, ifanelekile ukuba yongezwe kwindawo esezantsi ukuze kuthintelwe inkqubo yokufutha yonke inkqubo yokufutha.

2. Izithinteli zeGPE

I-ethylene oxide yongezwa ekupheleni kwekhonkco le-polypropylene glycol ye-GP Antifoamers ukuze yenze i-polyoxyethylene oxypropylene glycerol enesiphelo se-hydrophilic. I-GPE Antifoamer inamandla okumelana ne-hydrophilicity, inamandla okumelana ne-foaming, kodwa ikwanokunyibilika okukhulu okubangela ixesha elifutshane lokugcinwa komsebenzi we-antifoaming. Ke ngoko, inefuthe elihle kumhluzi we-viscous fermentation.

3. Ii-GPEs Antifoamers

I-block copolymer enemixokelelwane ye-hydrophobic kuzo zombini iziphelo kunye nemixokelelwane ye-hydrophilic yenziwa ngokutywina isiphelo semixokelelwane ye-GPE Antifoamers nge-hydrophobic stearate. Iimolekyuli ezinale sakhiwo zihlala ziqokelelana kwindawo yokuhlangana kwegesi nolwelo, ngoko ke zinomsebenzi onamandla womphezulu kunye nokusebenza kakuhle kokucocwa kwenkunkuma.

IV.I-Silicone eguqulweyo yePolyether

Ii-Antifoamers zeSilicone eziGuquliweyo zePolyether luhlobo olutsha lwee-defoamers ezisebenzayo kakhulu. Zingabizi kakhulu kwaye zineengenelo zokusasazeka kakuhle, amandla okuthintela i-foam aqinileyo, uzinzo, azinatyhefu kwaye azinabungozi, aziguquguquki kakhulu kwaye zinamandla e-Antifoamers. Ngokweendlela ezahlukeneyo zoqhagamshelo lwangaphakathi, zingahlulwa zibe ziindidi ezimbini ezilandelayo:

1. I-Copolymer ene-bond ye-Si-OC elungiselelwe nge-asidi njenge-catalyst. Le defoamer kulula ukuyi-hydrolysis kwaye ayinazinzo. Ukuba kukho i-amine buffer, ingagcinwa ixesha elide. Kodwa ngenxa yexabiso layo eliphantsi, amandla ophuhliso acacile kakhulu.

2. I-copolymer ebotshelelwe yi-si-c-bond inesakhiwo esizinzileyo kwaye ingagcinwa iminyaka engaphezu kwemibini phantsi kweemeko ezivaliweyo. Nangona kunjalo, ngenxa yokusetyenziswa kweplatinum ebiza kakhulu njenge-catalyst kwinkqubo yemveliso, iindleko zemveliso yolu hlobo lwe-antifoamers ziphezulu, ngoko ke ayikasetyenziswa kakhulu.

V. Isithambisi seSilicon esingokwemvelo

...isahluko esilandelayo.