Fractal Characters of Material Texture of Self-assembled BaTiO₃/Poly-L-Lactic-Acid Composites

Abstract

The dispersion of self-assembled BaTiO₃ (BT) agglomerates in poly-L-lactic-acid (PLLA) polymer matrix was decided with the multifractal analysis to investigate characters of the aggregated morphology of the secondary particle group. On the multifractal analysis, the results showed that the average secondary particle area is increased with increasing the capacity dimension (D₀). The average secondary particle area is related to BT agglomerates. It showed that S^1/2 and D₀ plot increased linearity. Therefore, BT agglomerates and D₀ have a correlation. It suggested that D₀ is related to the morphology of the BT agglomerates. The average dielectric constant (ε′) is increased with increasing D₀. It was considered that the formation of the hetero interface of BT/PLLA contributed to the increase in the average dielectric constant of BT/PLLA composites.