Document Type

Article

Publication Version

Submitted Manuscript

Publication Date

12-2-2014

Journal or Book Title

Structural Health Monitoring

Volume

14

Issue

29

First Page

158

Last Page

167

DOI

10.1177/1475921714560072

Abstract

Recent advances in flexible electronics have enabled the development of large-area electronics, which are typically fabricated from petroleum-based polymers. With the rapidly growing market of flexible electronics and sensors, there is a pressure to move toward environmentally friendly products. In this article, a bio-based polyurethane soft elastomeric capacitor for structural health monitoring applications is presented. The sensor’s dielectric is fabricated using castor oil–based waterborne polyurethane, mixed with titanium dioxide, which replaces petroleum-based dielectric materials (e.g. styrene-ethylene/butylene-styrene) previously used by the authors. A critical advantage of the proposed castor oil–based polyurethane over styrene-ethylene/butylene-styrene is the environmentally friendly nature of the bio-based polymer and water-based fabrication process of the dielectric that limits the use of solvents. Static characterization demonstrates the linearity of the sensor and its ability to transduce local strain of large surfaces into change in capacitance. Material test results show good physical and chemical properties, despite a decay of the dielectric that occurs after the first 16 days of fabrication.

Comments

This is a manuscript of an article from Structural Health Monitoring, 14(2), 2015: 137-147 doi:10.1177/1475921714560072.. Posted with permission

Copyright Owner

The Authors

Language

en

File Format

application/pdf