I-Antifoams isetyenziselwa ukunciphisa uxinzelelo lwamanzi, isisombululo kunye nokumiswa, ukuthintela ukubunjwa kwe-foam, okanye ukunciphisa i-foam eyenziwe ngexesha lokuveliswa kwemveliso. Ii-Antifoamers eziqhelekileyo zezi zilandelayo:

I. I-oyile yeNdalo (oko kukuthi i-oyile yeembotyi zesoya, i-Oli yombona, njl.njl.)

Izinto eziluncedo: ezikhoyo, zingabizi kwaye zisebenziseka lula;

Ukungalungi: kulula ukuwohloka kunye nokunyusa ixabiso le-asidi ukuba ayigcinwanga kakuhle.

II.Utywala beCarbon ephezulu

Utywala obuphezulu bekhabhoni yimolekyuli ehambelanayo ene-hydrophobicity eyomeleleyo kunye ne-hydrophilicity ebuthathaka, eyi-antifoamer esebenzayo kwinkqubo yamanzi. Umphumo we-antifoaming wotywala unxulumene nokunyibilika kwayo kunye nokusabalalisa kwisisombululo esinegwebu. Utywala beC7 ~ C9 yeyona Antifoamers esebenzayo. I-carbon ephezulu ye-Alcohol ye-C12 ~ C22 ilungiselelwe kunye ne-emulsifiers efanelekileyo kunye nobukhulu be-particle ye-4 ~ 9μm, kunye ne-20 ~ 50% ye-emulsion yamanzi, oko kukuthi, i-defoamer kwinkqubo yamanzi. Ezinye ii-esters zikwanazo nefuthe le-antifoaming kwi-penicillin fermentation, efana ne-phenylethanol oleate kunye ne-lauryl phenylacetate.

III.Polyether Antifoamers

1. GP Antifoamers

Yenziwe ngokudibanisa i-polymerization ye-propylene oxide, okanye umxube we-ethylene oxide kunye ne-propylene oxide, kunye ne-glycerol njenge-arhente yokuqala. Ine-hydrophilicity embi kunye nokunyibilika okuphantsi kwindawo enogwebu, ngoko ifanelekile ukusetyenziswa kulwelo olubhityileyo lokubilisa. Ekubeni isakhono salo sokuchasa amagwebu siphezulu kuneso sokukhupha amagwebu, ifanelekile ukuba idityaniswe kwisiseko sesiseko sokuthintela ugwebu lwenkqubo yonke yokuvubela.

2. GPE Antifoamers

I-ethylene oxide yongezwa ekupheleni kwekhonkco ye-polypropylene glycol chain ye-GP Antifoamers ukwenza i-polyoxyethylene oxypropylene glycerol kunye ne-hydrophilic end. I-GPE Antifoamer ine-hydrophilicity elungileyo, isakhono esomeleleyo sokuchasa amagwebu, kodwa ikwanokunyibilika okukhulu okubangela ukugcinwa kwexesha elifutshane lomsebenzi we-antifoaming. Ngoko ke, inefuthe elihle kwi-viscous fermentation broth.

3. GPEs Antifoamers

I-block copolymer enamatyathanga e-hydrophobic kuzo zombini iziphelo kunye namatyathanga e-hydrophilic yenziwa ngokutywina ukuphela kwekhonkco le-GPE Antifoamers nge-hydrophobic stearate. Iimolekyuli ezinolu lwakhiwo zikholisa ukuhlanganisana kujongano lwerhasi yolwelo, ke ngoko zinomsebenzi owomeleleyo womphezulu kunye nempumelelo enkulu yokukhupha ugwebu.

IV.Polyether Modified Silicone

I-Polyether Modified Silicone Antifoamers luhlobo olutsha lwe-defoamers ephezulu. Ixabiso eliphantsi kunye neenzuzo zokusasazwa okulungileyo, amandla okuthintela i-foam, ukuzinza, okungeyona inetyhefu kunye nokungenabungozi, ukuguquguquka okuphantsi kunye nekhono elinamandla le-Antifoamers. Ngokweendlela ezahlukeneyo zoqhagamshelo lwangaphakathi, lunokwahlulwa lube ziindidi ezimbini ezilandelayo:

1. I-Copolymer ene-Si-OC- ibhondi elungiselelwe nge-asidi njenge-catalyst. Le defoamer ilula kwi-hydrolysis kwaye inozinzo olubi. Ukuba isithinteli se-amine sikhona, sinokugcinwa ixesha elide. Kodwa ngenxa yexabiso layo eliphantsi, amandla ophuhliso abonakala kakhulu.

2. I-copolymer eboshwe ngu-si-c-bond inesakhiwo esizinzile kwaye inokugcinwa ngaphezu kweminyaka emibini phantsi kweemeko ezivaliweyo. Nangona kunjalo, ngenxa yokusetyenziswa kwe-platinum ebiza njenge-catalyst kwinkqubo yokuvelisa, ixabiso lokuveliswa kolu hlobo lwe-antifoams luphezulu, ngoko aluzange lusetyenziswe ngokubanzi.

V. Organic Silicon Antifoamer

…isahluko esilandelayo.