Fabrication and Characterization of Piezoelectric Hybrid Nanocomposite Films Based on Anionic Waterborne Polyurethane, Barium Titanate, and Boron Nitride Nanosheet
발표자
()
초록
내용
Waterborne polyurethanes (WPUs) have a combination of advantages of environmental friendliness (low VOC emission) and excellent performance in the field of surface coatings and films. To expand the applications of WPUs, we have investigated the piezoelectric properties of WPU-based hybrid nanocomposite films reinforced with barium titanate (BT) nanoparticles and hexagonal boron nitride (hBN) nanosheets. For this purpose, an anionic WPU was synthesized and it was mixed with different contents of BT nanoparticles with ~50 nm diameter and exfoliated hBN nanosheets. The structure and morphology of the hybrid nanocomposites were characterized by Raman, XRD, and SEM. The dielectric and piezoelectric properties were monitored using a network analyzer and a graphical sampling multimeter equipped with a pushing machine, respectively. The electromagnetic interference (EMI) shielding performance of the film was also characterized.