Influences of Surface-Modified Barium Titanate Nanoparticle on the Piezoelectric Performance of Anionic Waterborne Polyurethane Films
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초록
내용
Waterborne polyurethane (WPU) is regarded as an environmentally friendly material due to its low VOC emissions, durability, and excellent adhesion properties, and is suitable for a variety of applications, including coatings, adhesives, and films. To broaden the potential applications of WPU, in this study, we investigated the piezoelectric properties of WPU-based nanocomposite films, which were reinforced with barium titanate (BT). To achieve a high output value, the surface of BT particles was modified to prevent aggregation. The films were prepared by blending synthesized anionic WPU with modified BT nanoparticles. We chose low-molecular-weight modifiers, 4,4′-diphenylmethane diisocyanate (MDI) and phthalic acid (PA). To assess the structure and morphology of the nanocomposites, we employed FT-IR, XRD, and SEM techniques. The dielectric and piezoelectric properties of the materials were monitored using a graphical sampling multimeter equipped with a network analyzer and a pushing machine.