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-Oli yeNdalo (oko kukuthi i-Oli yeembotyi zeSoya, i-Oli yombona, njl.njl.)
Izinto eziluncedo: ziyafumaneka, ziyabiza 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 nge-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 sokugquma amagwebu, ifanelekile ukuba idityaniswe kwi-basal medium ukuthintela inkqubo yogwebu yenkqubo yokuvubela yonke.
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 esinamandla sokungagwebu, kodwa inonyibiliko olukhulu olubangela ukugcinwa kwexesha elifutshane lomsebenzi wokulwa nogwebu.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 ngamacandelo amabini alandelayo:
1. I-Copolymer ene-Si-OC- bond 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 ingagcinwa iminyaka engaphezu 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.
Ixesha lokuposa: Nov-19-2021