Title

Piezoresistive Geopolymer Enabled by Crack-Surface Coating

Abstract

The conductive polymer was introduced to crack surfaces in geopolymers to enable piezo-resistivity. In combination with crack morphology characterization and the piezo-resistive test, the functionalized geopolymer was found to achieve a high sensitivity (with ΔR/R0/Δ∈ equals to 376.9 for loading and 513.3 for unloading) to both small external stress (less than 2 MPa) and wide range of strains (up to 1700 µ∈). This piezo-resistive behavior can be well described by a coupled mechanical-conductive contact mechanism. A new way to enable the self-sensing function of materials utilizing their existing micro-features was successfully proposed and validated.

Department(s)

Civil, Architectural and Environmental Engineering

Second Department

Chemistry

Comments

This work is financially supported by Center for Infrastructure Engineering Studies at Missouri S&T , and Missouri Department of Transportation under contract of TR202008.

Keywords and Phrases

Conductive polymer; Contact mechanics; Geopolymer; Piezo-resistance; Self-sensing

International Standard Serial Number (ISSN)

0167-577X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Elsevier B.V., All rights reserved.

Publication Date

01 Nov 2019

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