| Summary: | 碩士 === 國立中興大學 === 材料科學與工程學系所 === 101 === In this study, the polyaniline/graphene composites were fabricated through in-situ chemical oxidation polymerization with various amounts of sodium dodecyl sulfate (SDS). The graphene was obtained from reduced graphene oxide, which was treated using various reduction time of graphene oxide. The structure and physical properties of reduced graphene oxide were investigated using XRD, FT-IR, Raman, TGA and SEM. The conductivity and thermal stability of the reduced graphene oxide were enhanced with increasing reduction time. The weight loss of graphene oxide in the temperature range of 150-250°C was due to the remove of oxygen-containing functional group. After 24 hr reduction, there is only a small amount of weight loss in the temperature region. The conductivity of graphene oxide and 24 hr reduced graphene oxide is 4.36 x10-5 and 18 S/cm. Both results indicate that the reduced graphene oxide was suitable to use as a reinforcing material to prepare conductive polyaniline/graphene composite.
The conductivity of conductive polyaniline prepared in HCl solution, through chemical oxidation polymerization was 45.8 S/cm. As the loading of 25mg/ml SDS into system, the conductivity drastically increase to 90.3 S/cm. By adding more SDS into the system, the conductivity of polyaniline/graphene was slightly decreased. The chemical composition of polyaniline/graphene composite was characterized using XPS. The intensity ratio of [N+]/[N] increased as the addition of SDS increased to 25 mg/ml. Continuous loading of SDS into the system, the intensity ratio [N+]/[N] decreased. This result is consistent with our experimental data of conductivity.
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