Abstract:
This research was studied the effect of polyaniline doped with dodecylbenzenesulfonic acid (DBSA-PANI) filler on properties of carbon composite plate. The first part of the research was investigated ratio of graphite and epoxy resin of composite and condition for composite molding. The result was shown that the graphite/epoxy resin composite with 85 wt.% graphite indicated the best properties. It was revealed the 67 s/cm for in-plane conductivity and 27 s/cm for through-plane conductivity, flexural strength of 32 MPa, density of 1.98 g/cm3, 0.69% of water absorption and 1.37% of porosity. For composite molding condition, the results were shown that the mechanical properties were decreased and water absorption was increased as the pressure molding increased, when the studied pressure was 12 16 MPa. In the opposite way, the increased temperature (100-190oC) and time molding (5-60 min), the mechanical properties of composite were increased as the water absorption was decreased. The second part of the research was studied an effect of DBSA-PANI on properties of graphite/epoxy resin composite with 85 wt.% graphite. The results were indicated that the 1 wt.% of DBSA-PANI could be increased electrical conductivity of the composite. The composite with 1 wt.% DBSA-PANI had dominated the in-plane conductivity of 73 s/cm and through-plane conductivity of 33 s/cm. The mechanical properties were not significant changed. (27 MPa of flexural strength, 0.97% water absorption, 1.8% porosity and 1.87 g/cm3 of density.).