Multi-layer film structures of poly(lactic acid) (PLA) and fish gelatin (FG), prepared using the solventcasting technique, were studied in an effort to produce bio-based films with low oxygen (OP) and watervapor permeability (WVP). The scanning electron microscopy (SEM) images of triple-layer film showedthat the outer PLA layers are being closely attached to the inner FG layer to make continuous film. TheOP of multi-layer film (5.02 cm3/m2day bar) decreased more than 8-fold compared with that of the PLAfilm, and the WVP of multi-layer film (0.125 g mm/ kPa h m2) also decreased 11-fold compared with thatof the FG film. Lamination with PLA profoundly increased the water resistance of the bare gelatin film.Meanwhile, the tensile strength of the triple-layer film (25 ± 2.13 MPa) was greater than that of FG film(7.48 ± 1.70 MPa). At the same time, the resulting film maintains high optical clarity. Differential scanningcalorimetry (DSC) analysis also revealed that the materials were compatible showing only one Tgwhichdecreased with FG deposition. This material exhibits an environmental-friendliness potential and a highversatility in food packaging.
کلید واژگان :Multi-layer filmPoly (lactic acid)Fish gelatinOxygen permeabilityWater vapor permeabilityFilm properties
ارزش ریالی : 600000 ریال
با پرداخت الکترونیک