To reduce the hygroscopic character of biodegradable starch-based films, rapeseed oil was incorporated
by lamination (starch-oil-starch 3-layers technique). The lipid lamination followed by starch solution
casting step induced an emulsion type structure of dried films. Composite films are more opalescent
and glossier than fatty free starch films. For all the films, structure is heterogeneous in the cross-section
only. Adding fat induced a twice decrease of the tensile strength. Thermal gravimetry analysis did not
show differences between films with and without oil. Lipid reduced the moisture absorption particularly
at higher RH as well as the surface swelling index, when water droplet contact occurred. Addition of lipids
always decreases the contact angle for all liquid tested, except for water. Surface affinity of films for liquids
less polar that water increased with rapeseed oil addition. The addition of rapeseed oil significantly
reduces water vapour and oxygen permeability