Shape-Memory PVDF Exhibiting Switchable Piezoelectricity.
In this study, a material is designed which combines the properties of shape-memory and electroactive polymers. This is achieved by covalent cross-linking of polyvinylidene fluoride. The resulting polymer network exhibits excellent shape-memory properties with a storable strain of 200%, and fixity as well as recovery values of 100%. Programming upon rolling induces the transformation from the nonelectroactive α-phase to the piezoelectric β-phase. The highest β-phase content is found to be 83% for a programming strain of 200% affording a d33 value of -30 pm V(-1). This is in good accordance with literature known values for piezoelectric properties. Thermal triggering this material does not only result in a shape change but also renders the material nonelectroactive.
Biomaterials and Polymer Science, Department of Biochemical and Chemical Engineering, TU Dortmund, 44221, Dortmund, Germany.
Robin
R
Hoeher
Biomaterials and Polymer Science, Department of Biochemical and Chemical Engineering, TU Dortmund, 44221, Dortmund, Germany.
Thomas
T
Raidt
Institute of Materials Science, Technische Universität Darmstadt, 64827, Darmstadt, Germany.
Nikola
N
Novak
Biomaterials and Polymer Science, Department of Biochemical and Chemical Engineering, TU Dortmund, 44221, Dortmund, Germany.
Frank
F
Katzenberg
Biomaterials and Polymer Science, Department of Biochemical and Chemical Engineering, TU Dortmund, 44221, Dortmund, Germany.
Joerg C
JC
Tiller
D055664:Electrochemical Techniques; D011145:Polyvinyls / Q000737:chemistry*; D005465:Fluorocarbon Polymers
D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers
electroactive polymer; piezoelectricity; polyvinylidene fluoride; shape-memory polymer; switchable