Applied Surface Science, Vol.452, 429-436, 2018
High-performance piezo-damping materials based on CNTs/BaTiO3/F-PAEK-b-PDMS under high temperature steam conditions
Polymeric piezo-damping composites with robust piezo-damping performance under high temperature steam conditions are highly desirable. In this study, we demonstrate a novel piezo-damping material, consisting of fluorinated (polyaryletherketone)-(polydimethylsiloxane) block copolymers (F-PAEK-bPDMS) as matrix, multi-walled carbon nanotubes (CNTs) as conductive filler, and barium titanate (BT) as piezoelectric phase. Taking the advantages of hydrophobic property of PDMS and good thermal stability of F-PAEK, piezo-damping materials exhibit good stability under high temperature steam conditions. Furthermore, for the incompatibility between F-PAEK and PDMS, microphase separation appears, which can greatly increase the friction between molecules for better damping capability. Good damping performances that loss factor > 0.3 over a broad temperature range of 55-115 degrees C (approximate to 60 degrees C) can be achieved. Those outstanding performances can effectively broaden the practical application of piezo-damping composites under harsh conditions. (C) 2018 Elsevier B.V. All rights reserved.