Effect of protein concentrations on the properties of fish myofibrillar protein based film compared with PVC film

Abstract

The effect of protein concentrations on the properties of fish myofibrillar protein film (FMP) were investigated and compared with commercial wrap film (polyvinyl chloride; PVC). FMP (2 %, w/v) showed the highest mechanical properties [tensile strength: 4.38 MPa and elongation at break: 133.05 %], and water vapor permeability [2.81 × 10−10 g m−1 s−1 Pa−1]. FMP contained high molecular weight cross-links, resulting in complex film network, as indicated by lower film solubility (19–22 %) and protein solubility (0.6–1.3 %). FMP showed excellent barrier properties to UV light at the wavelength of 200–280 nm. FMP had the thickness [0.007–0.032 mm], color attributes and transparency similar to PVC film [thickness: 0.010 mm]. Therefore, protein concentration majority influenced the properties of develop FMP. The protein content of 1 % (w/v) had potential to be developed the biodegradable film with comparable properties to the commercial wrap film.