Film/coating formation surface coverage

Emulsifiers are surface active substances that modify interfacial eneigy at the interface of immiscible systems. Emulsifiers are often required in the film formation to disperse lipid particles in composite emulsion films or to achieve sufficient surface wettability to ensure proper surface coverage and adhesion to the coated surface (Krochta 2002). Some common emulsifiers are acetylated monoglyceride, lecithin, glycerol monopal-mitate, glycerol monostearate, polysoibate 60, polysoibate 65, polysoibate 80, sodium lauryl sulfate, sodium stearoyl lactylate, soibitan monooleate, and soibitan monostearate (Janjarasskul and Krochta, 2010). 

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