The mechanical properties of pure chitosan and chitosan-based composite films are shown in Table 2. Tensile strength (TS) of the chitosan-based composite films decreased with increasing addition of GFSE. Pure chitosan film had a TS of 54.9 MPa, while the TS
of chitosan-based composite films with 0.5, 1.0 and 1.5% v/v GFSE decreased to 20.6, 8.84 and 8.39 MPa, respectively. The decrease in TS corresponded to the results reported by Cha et al. [7] in which TS of Na-alginate and kappa-carrageenan base film also decreased with the inclusion of GFSE. The lower TS of chitosan-based composite films could be attributed to the reduction of intermolecular interactions between chitosan chains in the presence of GFSE within the film matrix. Despite the reduction in TS of chitosan-based composite films, it was noted that chitosan-0.5% v/v GFSE composite film exhibited a TS of 20.6 MPa that was comparable to the TS of polyethylene (13–28 MPa), a commonly used synthetic film [7,17].
The mechanical properties of pure chitosan and chitosan-based composite films are shown in Table 2. Tensile strength (TS) of the chitosan-based composite films decreased with increasing addition of GFSE. Pure chitosan film had a TS of 54.9 MPa, while the TSof chitosan-based composite films with 0.5, 1.0 and 1.5% v/v GFSE decreased to 20.6, 8.84 and 8.39 MPa, respectively. The decrease in TS corresponded to the results reported by Cha et al. [7] in which TS of Na-alginate and kappa-carrageenan base film also decreased with the inclusion of GFSE. The lower TS of chitosan-based composite films could be attributed to the reduction of intermolecular interactions between chitosan chains in the presence of GFSE within the film matrix. Despite the reduction in TS of chitosan-based composite films, it was noted that chitosan-0.5% v/v GFSE composite film exhibited a TS of 20.6 MPa that was comparable to the TS of polyethylene (13–28 MPa), a commonly used synthetic film [7,17].
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