Abstract
Piezoelectric generators (PEGs) have applications in future wearable and implantable technologies, but suffer from insufficient flexibility, poor biocompatibility, facile biodegradation, and low energy output. In this work, a design concept for a piezoelectric elastomer is proposed. Uniquely, we focus on develo** a complete “green” design concept, considering the selection of a bio-based monomer, polymer fabrication, and biodegradation. The piezoelectric elastomer, which was prepared by the copolymerization of lactate, 1,4-butanediol, and sebacate monomers, is capable of generating an output voltage of 303.75 mV cm−2 and an output current of 1.92 × 10–2 mA cm−2, which are 7.11 times and 4.01 times, respectively, higher than those of a conventional polyvinylidene fluoride–trifluoroethylene copolymer (PVDF-TrFE)-based PEG under the same measurement conditions. Such efficient piezoelectric conversion is attributed to the reduced elastic modulus of the elastomer, which resulted from the random polymerization between piezoelectric lactate monomers and linear 1,4-butanediol and sebacate monomers. As a result, the elastomer generates a greater piezoelectric charge on deformation than traditional PVDF-TrFE. Further, the relative growth rate of L929 mouse fibroblast cells grown on the modified elastomer was unaffected, demonstrating the good biocompatibility of the piezoelectric elastomer. On the basis of the overall environmentally friendly product cycle and high piezoelectric output, this PEG shows promise for applications in future wearable and implantable technologies.
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This work was supported by Start-up Funding of University of Electronic Science and Technology of China (Y030212059003040) and Chinesisch-Deutsche Zentrum für Wissenschaftsförderung, China (GZ 1697).
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Wang, X., Zhang, Q., Zhu, H. et al. A highly efficient piezoelectric elastomer with a green product cycle from fabrication to degradation. J Mater Sci 58, 4840–4852 (2023). https://doi.org/10.1007/s10853-023-08349-y
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DOI: https://doi.org/10.1007/s10853-023-08349-y