Acoustic and Optoelectronic Nature and Interfacial Durability of Modified CNT and GnP-PVDF Composites with Nano-Structural Control

Abstract

Nano- and hetero-structures of modified carbon nanotube (CNT) and Graphene nano Platelet (GnP) can control significantly piezoresistive and optoelectronic properties in Microelectromechanical Systems (MEMS) as acoustic actuators. Interfacial durability and electrical properties of modified CNT and GnP embedded in poly (vinylidene fluoride) (PVDF) nanocomposites were investigated for use in acoustic actuator applications. Modified GnP coated PVDF nanocomposite exhibited better electrical conductivity than neat and modified CNT due to the unique electrical nature of GnP. Modified GnP coating also exhibited good acoustical properties. Contact angle, surface energy, work of adhesion, and spreading coefficient measurements were contributed to explore the interfacial adhesion durability between neat CNT or plasma treated CNT and plasma treated PVDF. Acoustic actuation performance of modified GnP coated PVDF nanocomposites were investigated for different radii of curvature and different coating conditions, using a sound level meter. Modified GnP can be a more appropriate acoustic actuator than CNT cases because of improved electrical properties. Optimum radius of curvature and coating thickness was also obtained for the most appropriate sound pressure level (SPL) performance. This study can provide manufacturing parameters of transparent sound actuators with good quality practically.