In vitro gastric lipid digestion of emulsions with mixed emulsifiers: Correlation between lipolysis kinetics and interfacial characteristics

Emulsions stabilized by a mixture of emulsifiers may show tailored functionality depending on the compatibility employed. This was proposed in previous work dealing with distinct lipolysis kinetics citrus pectin (CP) and Tween 80 (TW80) based emulsions. CP provided fast high extent gastric lipid hydrolysis, TW80 presented negligible digestion emulsions mixtures intermediate kinetics. The current research aimed to investigate interfacial mechanisms underlying further understand encountered behavior fundamental basis. achieved monitoring tension measuring rheology layers during vitro using modified pendant drop technique. allowed correlation phenomena digestion. Two extremely different were observed when single versus for binary layers, importantly correlating results obtained These findings are discussed detail confirm that competitive adsorption between lipase (e.g. orogenic displacement) is key factor determining mixed emulsifiers.