Studies On Preparation And Properties Of Novel Mesoporous Inorganic Matters/Polyaniline Nanocomposites

This paper focused on the basis of polyaniline (PAN1), starting from the structural characteristics of the inorganic mesoporous materials, combining with the principle of surface modification, and prepared novel mesoporous inorganic matters/polyaniline nanocomposites with different structures and properties via a simple method. The formation, mechanism and structural characteristics of the nanocomposite materials were also emphasized. In this paper, we provide some ideas and methods for transition of PANI from basic conducting polymer to functional materials.For the first time, we proposed the mesoporous materials as both the inorganic component and the dopant in the synthesis process of the PANI. In this way, we got a new type of mesoporous inorganic matters/PANI nanocomposites, which combine the regular structure, rigidity, dimensional and thermal stability of the inorganic mesoporous materials with the organic polymers. Meanwhile after the surface modification, the inorganic components can dope the PAN1 chains with the in situ proton acids, greatly improving the conductivity of the PANI matrix. Finally, we achieved the improvment in electrical properties as well as the processability of the mesoporous inorganic matters/PANI nanocomposites.Functional MCM-48 (F-MCM-48), prepared by anchoring the organic sulfonic acid on the surface of the 3D cubic (Ia3d) structural MCM-48, was used as both the inorganic substrate and the in situ dopant for the in situ chemical oxidative polymerization of aniline to obtain the PANI/F-MCM-48 nanocomposite material. The surface functionalization of F-MCM-48 was found to play an important role in the formation of the well-defined raspberry-like morphology. The composition, structure and electrical properties of PANI/F-MCM-48 were characterized by SEM, FT-IR, four-point probe, UV-vis, XRD, and TGA. We focused on the content of F-MCM-48 and its own pore structure how to impact the conductivity of the nanocomposites. The material is expected to be applied in electrochemical capacitors.Halloysite nanotubes decorated with self-assembled protonic acids monolayer (SPAM-HNTs) was successfully prepared by anchoring the organic sulfonic acid onto the surface of tubular halloysite, and performed as in-situ dopant to obtain the conducting SPAM-HNTs/PANI nanocomposites via in situ chemical oxidative polymerization of aniline. The surface functionalization of HNTs with protonic acids monolayer was found to play an important role in the formation of the well-defined coaxial tubular structure. The SPAM-HNTs/PANI nanocomposites were characterized with FT-IR, TEM, four probes, UV-vis, XRD, and TGA. The effect of the SPAM-HNTs feeding ratio on the electrical conductivity of the products was also emphasized. The SPAM-HNTs/PANI nanocomposites were suggested their potential application in electrode material for electrochemical capacitors.