3.5.1. Tensile strength
Tensile strength of bionanocomposite films was presented in this Fig. 5a. It was observed that the tensile strength increases sig- nificantly by increasing the concentration of nanoparticles from
0.1% to 0.5% into the chitosan matrix. In which chitosan/0.5% ZnO nanocomposite films have higher tensile strength (51 MPa) when compared to the pure chitosan (30 MPa) and other two concentrations, this is because of maximum well dispersion of nano zinc oxide into chitosan polymer matrix which prevents material from coagulation. And further increased in essential oil incorporated in the chitosan/0.5% ZnO nanocomposite film (60 MPa) was found due to the good interaction between the metal oxide and chitosan as well as the strong interaction taking place between bio-active group present in neem oil and functional group present in chitosanmetal oxide composite material as earlier described in FTIR spectrum.