University of Oulu

Tolvanen, J., Hannu, J., Nelo, M., Juuti, J., Jantunen, H. (2016) Dielectric properties of novel polyurethane–PZT–graphite foam composites. Smart Materials and Structures, 25 (9), 095039. doi:10.1088/0964-1726/25/9/095039

Dielectric properties of novel polyurethane–PZT–graphite foam composites

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Author: Tolvanen, Jarkko1; Hannu, Jari1; Nelo, Mikko1;
Organizations: 1Microelectronics Research Unit, Department of Electrical Engineering, University of Oulu, PO Box 4500, FI-90014 University of Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.5 MB)
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Language: English
Published: IOP Publishing, 2016
Publish Date: 2017-08-12


Flexible foam composite materials offer multiple benefits to future electronic applications as the rapid development of the electronics industry requires smaller, more efficient, and lighter materials to further develop foldable and wearable applications. The aims of this work were to examine the electrical properties of three- and four-phase novel foam composites in different conditions, find the optimal mixture for four-phase foam composites, and study the combined effects of lead zirconate titanate (PZT) and graphite fillers. The flexible and highly compressible foams were prepared in a room-temperature mixing process using polyurethane, PZT, and graphite components as well as their combinations, in which air acted as one phase. In three-phase foams the amount of PZT varied between 20 and 80 wt% and the amount of graphite, between 1 and 15 wt%. The four-phase foams were formed by adding 40 wt% of PZT while the amount of graphite ranged between 1 and 15 wt%. The presented results and materials could be utilized to develop new flexible and soft sensor applications by means of material technology.

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Series: Smart materials & structures
ISSN: 0964-1726
ISSN-E: 1361-665X
ISSN-L: 0964-1726
Volume: 25
Issue: 9
Article number: 095039
DOI: 10.1088/0964-1726/25/9/095039
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
213 Electronic, automation and communications engineering, electronics
Funding: This study was supported by the Piling of Printed Intelligence project funded by the Finnish Agency for Technology and Innovation (TEKES) and the Tactile project supported by the Faculty of Information and Electrical Engineering of the University of Oulu.
Copyright information: © Copyright 2017 IOP Publishing. Published in this repository with the kind permission of the publisher.