Polymer blends of polyaniline complexes and water-based polyurethane were s
tudied in nanometer scale by TEM, AFM and SNOM. TEM photographs show the di
stribution of polyaniline complexes. The image of AFM and SNOM show the top
ography of the blends. The image of SNOM can also show the distribution of
conductive emeraldine salt, emeraldine base and pernigraaniline forms. SNOM
results show that the conductive polyaniline is distributed around the par
ticles, and the polyaniline base from is distributed in the center of the p
article. The results agree with AFM results using phase detector, which sho
w the phase rich in polyurethane is in the center of the particle, and the
phase rich in polyaniline salt is around the particle. Combination of TEM,
AFM and SNOM provides a good way to study the distribution of conductive po
lyaniline in the blend.