Kukho iimpawu ezininziukungazinzi kwe-emulsion: ukuqunjelwa, ukuhlangana, ukuhluma (okanye ukubola), ukudilizwa, ukuguqulwa kwesigaba kunye nokuvuthwa kwe-Ostwald.
1. Ukuxinana kwamanzi
Amaconsi asasazekileyo kwi-emulsion aggregate ukuze enze amaqela amaconsi anemilinganiselo emithathu, achazwa njenge-flocs, kwaye le nkqubo ibizwa ngokuba yi-flocculation. Phantsi kweemeko eziqhelekileyo, akukho tshintsho lubalulekileyo kubungakanani kunye nokusasazwa kwamaconsi ngaphakathi kwi-flocs, kwaye i-droplet coalescence ayenzeki, apho amaconsi egcina iimpawu zawo zokuqala. I-Flocculation ibangelwa ngamandla akhangayo phakathi kwamaconsi. Amandla anjalo adla ngokuba buthathaka, okwenza inkqubo ye-flocculation iguqulwe (eyaziwa ngokuba yi-weak flocculation), kwaye ukushukuma kunokwahlula ii-flocs.
2.Ukuhlangana
Ukuba amathontsi e-flocculates ayahlangana, iifilimu zolwelo zamathontsi amancinci ngaphakathi ziyaqhekeka kwaye zenze ii-beads ezinkulu zolwelo. Le nkqubo ichazwa njenge-coalescence. I-coalescence yinkqubo engenakuguqulwa, ekhokelela ekunciphiseni inani lamathontsi kunye nokuqhekeka ngokupheleleyo kwe-emulsions, oko kukuthi ukwahlukana kweoyile namanzi. I-Flocculation isebenza njengesiqalo se-coalescence, ngelixa i-coalescence iyimbangela ethe ngqo yomonakalo we-emulsion.
3.Ukwahlulahlulahlula
Ngenxa yomahluko kuxinano phakathi kwesigaba seoyile kunye nesigaba samanzi, amathontsi aya kudada okanye atshone phantsi kwesenzo somxhuzulane, nto leyo emisela i-gradient concentration gradient ye-droplet kwi-emulsion. Le nkqubo yaziwa ngokuba yi-creaming okanye i-sedimentation. Nangona i-creaming iphazamisa ukufana kwe-emulsion, i-emulsion ngokwayo ayitshatyalaliswanga ngokwenene.
I-emulsion yinkqubo engaguqukiyo ngokwe-thermodynamically apho imeko yokugqibela yokulingana ikukuhlulwahlulwa kwe-oyile namanzi kunye nokuhluzwa (njengomaleko wamanzi kunye nomaleko we-oyile), kwaye ukuhluzwa kwe-demulsification sisiphumo sayo esingenakuphepheka. Kwimimandla ethile yemizi-mveliso, kufuneka ukuhluzwa kwe-demulsification. Umzekelo, ukuhluzwa kwe-oyile eluhlaza (W/O) ukuze kufunyanwe ukuhluzwa kwe-oyile namanzi.
5. Uhlobo
I-emulsion inokutshintsha ukusuka kuhlobo lwe-W/O ukuya kuhlobo lwe-O/W, okanye ngokuchaseneyo, ngenxa yotshintsho kwiimeko ze-emulsification, kwaye le nkqubo yaziwa ngokuba yi-phase inversion.
6. Ukuvuthwa kwe-Ostwald
Ii-emulsions ezinamathontsi obungakanani obahlukeneyo (ii-polydisperse emulsions) zinokuhlala zizinzile kwaye zixhathise ukutyibilika okanye ukuhlangana. Nangona kunjalo, ngokuhamba kwexesha, ukusasazwa kobungakanani bethontsi kuya kumathontsi amakhulu, ijika lokusasazwa kobungakanani bethontsi liba nzulu ngakumbi, kwaye ubukhulu bethontsi buhlala bufana. Le meko, efana nenkqubo yokuvuthwa kwekristale, ibizwa ngokuba yi-Ostwald ripening.
Ixesha leposi: Epreli-24-2026