Xa ukhetha ii-surfactants kwiifomyula zakho zokucoca okanye usetyenziso lokucubungula, i-foam luphawu olubalulekileyo. Umzekelo, kwiifomyula zokucoca ezenziwe ngesandla—ezifana neemveliso zokhathalelo lwezithuthi okanye ukuhlamba izitya ngesandla—amanqanaba aphezulu e-foam adla ngokuba luphawu olufunekayo. Oku kungenxa yokuba ubukho be-foam ezinzileyo kakhulu bubonisa ukuba i-surfactant iyasebenza kwaye yenza umsebenzi wayo wokucoca. Ngokwahlukileyo koko, kwiifomyula ezininzi zokucoca nokucubungula kwimizi-mveliso, i-foam inokuphazamisana nezenzo ezithile zokucoca ngoomatshini kwaye ithintele ukusebenza ngokubanzi. Kule meko, abaqulunqi kufuneka basebenzise ii-surfactants ezine-foam ephantsi ukuze banikezele ukusebenza okufunekayo kokucoca ngelixa belawula uxinano lwe-foam. Eli nqaku lijolise ekungeniseni ii-surfactants ezine-foam ephantsi, ukubonelela ngendawo yokuqala yokukhetha i-surfactant kwiifomyula zokucoca ezine-foam ephantsi.
Izicelo zeFoam ephantsi
Igwebu lenziwa kukushukuma kwindawo ejongene nomoya nomphezulu. Ke ngoko, izenzo zokucoca ezibandakanya ukushukuma okuphezulu, ukuxuba okucociweyo kakhulu, okanye ukutshiza ngoomatshini zihlala zifuna ii-surfactants ezinolawulo olufanelekileyo lwegwebu. Imizekelo ibandakanya: ukuhlamba iindawo, ukucoca i-CIP (ukucoca endaweni), ukukrwela umgangatho ngoomatshini, ukuhlamba impahla kwimizi-mveliso nakwimizi-mveliso, ulwelo lokusebenza ngesinyithi, ukuhlamba izitya zokuhlamba izitya, ukucoca ukutya neziselo, nokunye.
Uvavanyo lwee-Surfactants eziphantsi kwe-Foam
Ukukhethwa kwee-surfactants—okanye iindibaniselwano zee-surfactants—zokulawula i-foam kuqala ngokuhlalutya imilinganiselo ye-foam. Imilinganiselo ye-foam ibonelelwa ngabavelisi be-surfactant kwiincwadi zabo zobugcisa zemveliso. Ukuze kulinganiswe i-foam ngokuthembekileyo, iiseti zedatha kufuneka zisekelwe kwimigangatho yovavanyo lwe-foam eyaziwayo.
Iimvavanyo ezimbini zefoam ezixhaphakileyo nezithembekileyo luvavanyo lwefoam lweRoss-Miles kunye novavanyo lwefoam olune-shear ephezulu.
•Uvavanyo lweFoam lweRoss-Miles, luvavanya ukuveliswa kwefoam yokuqala (ifoam ekhanyayo) kunye nokuzinza kwefoam phantsi kokushukuma okuphantsi emanzini. Uvavanyo lunokubandakanya ukufundwa kwenqanaba lokuqala lefoam, kulandele inqanaba lefoam emva kwemizuzu emi-2. Lungenziwa nakwiindawo ezahlukeneyo zoxinzelelo lwe-surfactant (umz., 0.1% kunye ne-1%) kunye namanqanaba e-pH. Uninzi lwee-formulators ezifuna ulawulo lwefoam ephantsi zigxila kumlinganiselo wokuqala wefoam.
•Uvavanyo lwe-High-Shear (jonga i-ASTM D3519-88).
Olu vavanyo luthelekisa imilinganiselo yefoam phantsi kweemeko ezingcolileyo nezingcolileyo. Uvavanyo olunoboya obuphezulu lukwathelekisa ukuphakama kwefoam yokuqala kunye nokuphakama kwefoam emva kwemizuzu emi-5.
Ngokusekelwe kuyo nayiphi na indlela yovavanyo engentla, ii-surfactants ezininzi ezikwimarike ziyahlangabezana nemigangatho yezithako ezine-foam ephantsi. Nangona kunjalo, nokuba yeyiphi na indlela yovavanyo lwe-foam ekhethiweyo, ii-surfactants ezine-foam ephantsi kufuneka zibe nezinye iimpawu ezibalulekileyo zomzimba kunye nokusebenza. Ngokuxhomekeke kwindawo yokusetyenziswa kunye nokucoca, ezinye iimpawu ezibalulekileyo zokukhetha i-surfactant zingabandakanya:
•Ukusebenza kokucoca
•Iimpawu zendalo, impilo, kunye nokhuseleko (EHS)
•Iimpawu zokukhululwa komhlaba
•Uluhlu olubanzi lobushushu (oko kukuthi, ezinye izinto ezisebenzisa i-surfactants ezisebenzisa i-foam ephantsi zisebenza kuphela kubushushu obuphezulu kakhulu)
•Ukulula kokwenziwa kunye nokuhambelana nezinye izithako
•Uzinzo lweperoxide
Kwi-formulators, ukulinganisela ezi mpawu kunye nenqanaba elifunekayo lolawulo lwe-foam kwisicelo kubalulekile. Ukuze kufezekiswe olu lungelelwaniso, kudla ngokufuneka kudityaniswe ii-surfactants ezahlukeneyo ukujongana neemfuno ze-foam kunye nokusebenza—okanye ukukhetha ii-surfactants ze-foam ezisezantsi ukuya kweziphakathi ezinemisebenzi ebanzi.
Ixesha leposi: Sep-11-2025