Development Of Conductive Materials Research Articles

Precisely regulated crystalline phase of TiO2@composite G doped with Al3+: For the preparation of highly conductive, corrosion resistant conductive coatings

The development of conductive materials is crucial to the upgrading of modern science and technology industries. In recent years, the research on conductive materials synthesized based on TiO2 has mainly focused on improving the conductivity and stability of the materials. And this study, based on the high conductivity of the material, innovatively proposes a method to precisely regulate the crystal phase and morphology of TiO2 by CH3COOH and temperature together. Meanwhile, the heterostructure was successfully built by doping Al3+ into the TiO2 lattice, and a new conductive pathway (Al-O-C) was constructed. Finally, the composite G was prepared as an Al3+-doped TiO2 composite G (Al-T/G) functional material, and it was verified by first-principles calculations (DFT). The experimental results show that the Al-T/G material not only has the low surface resistance and high whiteness of TiO2, but also is endowed with more excellent resistivity (0.203 Ω·cm) and protection efficiency (92.45 %). Meanwhile, compared with the conventional antimony-doped tin dioxide (ATO) conductive materials, the Al-T/G functional materials prepared in this paper are basically harmless to the environment in the experimental process while ensuring high conductivity. Most importantly, this paper explores the bonding mechanism of Al3+-doped TiO2 conductive materials, which provides new insights and ideas in the field of dopant-modified TiO2 conductive materials.

Polyaniline effect on the conductivity of the PMMA/Ag hybrid composite

The electroless coating of Ag on PMMA sphere pre-coated with polyaniline (PANI) was investigated. Pre-coating was carried out using in situ chemical polymerization. The extent of silver coating on PMMA and PMMA/PANI particles was studied by measuring the remaining content of Ag using TGA, in terms of the number of pretreatment steps, PANI content, AgNO3 concentration and the particle size. The results indicated that the deposition of PANI on the PMMA surface induced high efficiency of the silver plating due to the activation effect. The resistivity of PMMA/Ag and PMMA/PANI/Ag composites varied between 1014 and 10−1Ωcm and between 108 and 10−4Ωcm, respectively. Such increase in resistivity, along with the relatively compact and continuous silver layer on PMMA/PANI/Ag composite particles showed that this method is effectively applicable on the development of conductive materials.