Preparation, Structure And Properties Of Carbon Nanomaterials / Polyphenylene Sulfide Composites

Poly(phenylene sulfide) (PPS) possesses thermal stability, chemical resistance, dimentional stability, inherent flame resistance and mechanical property, which makes it widely application in the environmental protection, aerospace, military, petrochemical, electronic, automobile and mechanical fields. However, there is a strong static electricity problem in the process of processing and using because PPS has a low conductive capacity. In addition, conductive materials can be widely used in the field of health monitoring and electronic drive, but insulation limits the application of PPS in these areas. In this paper, the different systems of conductive PPS composites involving multi-walled carbon nanotubes (MWCNTs) and reduced graphene oxide (RGO) were studied.Firstly, epoxy-functionalized MWCNTs (EFMWCNts) was synthesized, and it was used to modify amino-group substituted PPS (NPPS) via solution blending technique. The characteristic results of FT-IR, XPS, and SEM showed that NPPS chains were partially covalently attached onto the surface of EFMWCNts and MWCNTs were uniformly dispersed into NPPS matrix. The electrical conductivity of resulting composites was enhanced with MWCNTs load increase, and the measured conductivity of EFMWCNts/NPPS was 6.1×10-2 s/cm with 10 wt% EFMWCNts incorporation.Lastly, RGO-SiO2/CTAB/PPS composites with good electrical performance were prepared in the aqueous solution sysrem without any organic solvent. The characteristic results of SEM and TEM showed that the composites displayed fluffy lamellar structure and RGO presented uniform distribution in PPS polymer. In the composites, SiO2 can effectively restrain the RGO agglomeration and stack, and CTAB can reduce the interface force between RGO and PPS. The conductivity of composites were enhanced with RGO-SiO2 (RGO:SiO2=1:1 w/w) load increase, and the measured conductivity was 3.4 s/cm for composites with 5 wt% RGO-SiO2 incorporation, which was nearly 16 orders of magnitude higher than the conductivity of neat PPS.