PANI fibers emeraldine base

In the present work, we used polyaniline (PANI)/polyacrylonitrile (PAN) blend to form a nonwoven mat. The PANI exists in a large number of intrinsic redox states. The half oxidized emeraldine base is the most stable and widely investigated state in the PANI family that can be dissolved in N-methyl-2 pyrohdon (NMP). The polyaniline emeraldine base (PANIEB)/polyacrilonitrile blend solution in NMP was prepared and then it was electrospun with different blending ratio. The fibers diameter, fibers morphology, and electrical conductivity of the mats were analyzed and discussed. 

Emeraldine base (EB) and emeraldine salt (ES) forms of poly(o-methoxyaniline) (POMA), are able to construct biomolecular hybrids with DNA showing a fibrillar network structure of invariant fibrillar diameter for different hybrid compositions. An approximate model of the Na-DNA/POMA-ES system indicates nanostmctured self-organized assembly of the components in the hybrid [100]. However, the most desired property of fibers for the electronic devices technology is their orientation in a definite direction. Self-assembly of oriented PANI arrays can be achieved in the presence of inorganic acids and by changing the PANI/acid concentration ratio, (Fig. 1.6) [101, 102]. 

Fig. 18.17 Typical scanning electron micrograph of an as-spun PANI emeraldine base fiber cross section (900 x).

---