Salamiah Zakaria, Wahida Abdul Rahman, Mohd Ikmal Hisyam Basarudin and Sharizal Hasan
Keywords: climbing perch, fish gelatin, cross-linking agent.
Abstract: Gelatin film from Climbing Perch (Anabas testidenius) fish scales incorporated with 0.7% spent tea extract (STE) were prepared and characterized in comparison with (control) gelatin film without STE. The FTIR spectra analysis showed the existence of protein-polyphenol interactions in the incorporated gelatin film. The incorporation of STE enhanced the water resistance of gelatin film by reducing the film solubility and water vapor permeability but no significant differences in thickness for both films. The incorporation of STE into gelatin film increased the mechanical properties of the gelatin film. The incorporated film had higher tensile strength (TS), elastic modulus (EM) and lower elongation at break (EAB) compared to control film suggesting that incorporated film was much stiffer and stronger. The degradation rate of incorporated film was slower than control film. It can be concluded that the incorporation of gelatin film with STE could affect the properties of gelatin film due to the formation of polyphenol cross-links.