Improved composite piezoresistive strain sensors

Xiaoping Shui; Deborah D. Chung

doi:10.1117/12.232146

Improved composite piezoresistive strain sensors

Xiaoping Shui
, Deborah D. Chung

Department of Mechanical and Aerospace Engineering

SUNY Buffalo

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

The relationship between strain and the fractional increase in electrical resistance (ΔR/R_o) of piezoresistive polyether-sulfone-matrix composite strain sensors was found to be much more linear and less noisy when the electrically conducting filler was 0.1 micrometer-diameter carbon filaments rather than the conventionally used 10 micrometer- diameter carbon fibers. For the fiber composite, the non-linearity manifested itself as ΔR/R_o increasing reversibly with increasing compressive strain - an effect opposite to and occurring on top of piezoresistivity. This effect was absent in the filament composite. Furthermore, the percolation threshold was lower for the filament composite than the fiber composite. For both filament and fiber composites, ΔR/R_o became more negative as cycling progressed up to approximately 10 cycles and then stabilized, though the effect was more significant for the latter.

Original language	English
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Publisher	Society of Photo-Optical Instrumentation Engineers
Pages	251-258
Number of pages	8
Volume	2716
ISBN (Print)	0819420913, 9780819420916
DOIs	https://doi.org/10.1117/12.232146
State	Published - 1996
Event	Smart Materials Technologies and Biomimetics - San Diego, CA, USA Duration: Feb 26 1996 → Mar 2 1996

Conference

Conference	Smart Materials Technologies and Biomimetics
City	San Diego, CA, USA
Period	02/26/96 → 03/2/96

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10.1117/12.232146

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title = "Improved composite piezoresistive strain sensors",

abstract = "The relationship between strain and the fractional increase in electrical resistance (ΔR/Ro) of piezoresistive polyether-sulfone-matrix composite strain sensors was found to be much more linear and less noisy when the electrically conducting filler was 0.1 micrometer-diameter carbon filaments rather than the conventionally used 10 micrometer- diameter carbon fibers. For the fiber composite, the non-linearity manifested itself as ΔR/Ro increasing reversibly with increasing compressive strain - an effect opposite to and occurring on top of piezoresistivity. This effect was absent in the filament composite. Furthermore, the percolation threshold was lower for the filament composite than the fiber composite. For both filament and fiber composites, ΔR/Ro became more negative as cycling progressed up to approximately 10 cycles and then stabilized, though the effect was more significant for the latter.",

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year = "1996",

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booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "Society of Photo-Optical Instrumentation Engineers",

note = "Smart Materials Technologies and Biomimetics ; Conference date: 26-02-1996 Through 02-03-1996",

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T1 - Improved composite piezoresistive strain sensors

AU - Shui, Xiaoping

AU - Chung, Deborah D.

PY - 1996

Y1 - 1996

N2 - The relationship between strain and the fractional increase in electrical resistance (ΔR/Ro) of piezoresistive polyether-sulfone-matrix composite strain sensors was found to be much more linear and less noisy when the electrically conducting filler was 0.1 micrometer-diameter carbon filaments rather than the conventionally used 10 micrometer- diameter carbon fibers. For the fiber composite, the non-linearity manifested itself as ΔR/Ro increasing reversibly with increasing compressive strain - an effect opposite to and occurring on top of piezoresistivity. This effect was absent in the filament composite. Furthermore, the percolation threshold was lower for the filament composite than the fiber composite. For both filament and fiber composites, ΔR/Ro became more negative as cycling progressed up to approximately 10 cycles and then stabilized, though the effect was more significant for the latter.

AB - The relationship between strain and the fractional increase in electrical resistance (ΔR/Ro) of piezoresistive polyether-sulfone-matrix composite strain sensors was found to be much more linear and less noisy when the electrically conducting filler was 0.1 micrometer-diameter carbon filaments rather than the conventionally used 10 micrometer- diameter carbon fibers. For the fiber composite, the non-linearity manifested itself as ΔR/Ro increasing reversibly with increasing compressive strain - an effect opposite to and occurring on top of piezoresistivity. This effect was absent in the filament composite. Furthermore, the percolation threshold was lower for the filament composite than the fiber composite. For both filament and fiber composites, ΔR/Ro became more negative as cycling progressed up to approximately 10 cycles and then stabilized, though the effect was more significant for the latter.

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U2 - 10.1117/12.232146

DO - 10.1117/12.232146

M3 - Conference contribution

AN - SCOPUS:0029711553

SN - 0819420913

SN - 9780819420916

VL - 2716

SP - 251

EP - 258

BT - Proceedings of SPIE - The International Society for Optical Engineering

PB - Society of Photo-Optical Instrumentation Engineers

T2 - Smart Materials Technologies and Biomimetics

Y2 - 26 February 1996 through 2 March 1996

ER -

Improved composite piezoresistive strain sensors

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