Development of new albumen based biocomposites formulations by injection moulding using chitosan as physicochemical modifier additive

In this study, albumen/chitosan (EA/CH) based biocomposites were successfully prepared using injection moulding method. In particular, the influence of CH as physicochemical modifier additive in composite materials with EA protein matrix in different concentrations in the range of 0–40 wt.% were considered. Biocomposites from EA/CH were characterised by Fourier transform infrared spectroscopy (FTIR), thermal analysis and Confocal Laser Scanning Microscopy (CLSM). Dynamic Mechanical Thermal Analysis (DMTA), tensile properties, water absorption capacity and standard tests to assess antimicrobial activities of the composites were also evaluated. FTIR analysis showed no new chemical bonds, suggesting that there was no chemical reaction and that the interaction was weak between the two biopolymers. DMTA spectra were qualitatively similar for EA/CH biocomposites, and comparable to commercial low density polyethylene (LDPE). The incorporation of CH particles led to less stiff and less elastic composites. Thermal properties of albumen composite were affected by CH addition. Water absorption capacities of the modified composites were smaller than neat albumen composite.