Mechanical Properties and Thermal Stability of Graphene Oxide (GO) and Graphite/Gelatin Composite Membranes
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Abstract:
Graphene oxide and graphite/gelatin composite membranes were prepared by blending method. Tensile strength, elongation at break, heat shrinkage, SEM and light transmittance were used to characterize the prepared samples. The results indicated that the sample membrane of 5% graphene oxide tensile strength (17.98 MPa) was best, which increased by 53.4% compared with 0% sample membrane tensile strength (11.74 MPa). The sample membrane of 10% graphite elongation at break (57.3%) was best, which increased by 153% compared with 0% sample membrane elongation at break (22.65%). The compatibility of matrix GO was better than that of graphite by SEM. The thermal shrinkage at 5% graphite was smallest, which reduced by 27% compared with 0% sample membrane. The thermal shrinkage reduction tendency of graphite composite membrane was larger than that of GO composite membrane. With contents of GO and graphite increased, the light transmittance decreased and the haze increased. By comparing GO and graphite composite membranes, the GO had good binding with gelatin, molecular force was strong, and structure was stable. The graphite and gelatin had bad compatibility than GO and gelatin. But graphite had good protection on gelatin.
