Piezoresistive epoxy resin films with carbon black particles for small-strain sensors

Materials that change resistance after undergoing deformation have various types of applications as sensors. Among the materials that may be used for this purpose, there are some in which conducting particles are immersed in an isolating polymeric matrix. Carbon black (CB) particles have high electr...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2020-07, Vol.77 (7), p.3725-3734
Main Authors: Andreghetto, Dionatas Hoffmann, Fuzari, Gilberto de Campos
Format: Article
Language:English
Subjects:
Carbon black
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Electric conductors
Electrical resistivity
Epoxy resins
Homogeneity
Hydraulics
Organic Chemistry
Original Paper
Physical Chemistry
Polymer films
Polymer Sciences
Scanning electron microscopy
Sensors
Soft and Granular Matter
Solvents
Strain
Substrates
Viscosity
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Description
Summary:Materials that change resistance after undergoing deformation have various types of applications as sensors. Among the materials that may be used for this purpose, there are some in which conducting particles are immersed in an isolating polymeric matrix. Carbon black (CB) particles have high electrical conductivity, allowing them to be included in a resin epoxy (EPX) matrix and resulting in an electrical conductor composite; this can be done even in the case of low volumetric fractions of CB. The goal of this work was crafting a conducting polymeric film that has piezoresistive behavior for utilization as strain sensors for low deformations. A relevant aspect of the film development was the search for a solvent to lower the viscosity of the EPX to enhance the homogeneity of the composite. Acetone showed good potential as the solvent for this composite. The sensor showed efficiency under small strain, especially when used with a substrate.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-019-02908-7