| The conductive composites of polyaniline/bamboo charcoal (PANI/BC) were prepared by in-situ polymerization, in-situ emulsion polymerization, emulsion polymerization and re-doping method respectively, using bamboo charcoal (BC) as substrate, aniline (ANI) as monomer. The four methods were investigated. The conditions and the ratio were optimized. The conductivity, molecular structure, microstructure and thermal stability of composites were characterized by four-probes, FT-IR, SEM and TG. The relationship of the structure and properties were analyzed, and the reason for the different conductivity was discussed. The results showed that:The conductivity of PANI/BC prepared by in-situ polymerization (IS-PANI/BC) was 43.7 S·cm-1. The conductivity of PANI/BC synthesized by in-situ emulsion polymerization (ISE-PANI/BC) was 15.08 S·cm-1. The conductivity of PANI/BC prepared by emulsion polymerization (E-PANI/BC) was 3.02 S·cm-1. The conductivity of PANI/CSA/BC prepared by re-doping method (R-PANI/CSA/BC) was 14.8 S·cm-1. No new strong chemical bond between PANI and BC were observed from FT-IR spectra. From SEM and conductivity analysis, we could find that the coating efficiency was different from the preparation method and the composites with the better coating efficiency had the better conductivity. Comparing with PANI, the thermal stability of the composites increased with the accession of BC according to TG. Because of the high conductivity of composites and the simple process as well as cheap raw materials, the in-situ polymerization was the best method to prepare PANI/BC conductive composites.
|
PDF Full Text Request