Impact of the Addition of Gum Arabic on the Interface Dilational Properties of Gemini Surfactants

We studied the impact of the addition of Gum Arabic on the dilational properties of Gemini surfactants. The investigation found that the addition of 1% (w) Gum Arabic in the Gemini surfactants solutions caused a decrease in the interfacial tension, but the addition of 1% (w) Gum Arabic resulted in the dilational modulus increasing significantly. The explanation to this observation is that the electrostatic interaction of the Gum Arabic/surfactant complex increased and the dilational modulus increased. A possible schematic diagrams of the adsorbed Gemini molecules with Gum Arabic at the decane/water interface is proposed.