Multifunctional material design for strain sensing: Carbon black effect on mechanical and electrical properties of polyamides

被引：18

作者：

Ciampaglia, Alberto ^{[1
]}

Ciardiello, Raffaele ^{[1
]}

Cesano, Federico ^{[2
]}

Belingardi, Giovanni ^{[1
]}

Brunella, Valentina ^{[2
]}

机构：

[1] Politecn Torino, Dept Mech & Aerosp Engn, Turin, Italy

[2] Univ Torino, Dept Chem, Turin, Italy

来源：

COMPOSITE STRUCTURES | 2023年 / 304卷

关键词：

PMC; Polymers; PA6; Smart material; Nanoparticles; Conductivity; PIEZORESISTIVE PROPERTIES; REVERSIBLE PHENOMENA; BIPOLAR PLATES; COMPOSITE; NANOTUBES; SENSOR; FIBER; SENSITIVITY; PERFORMANCE; BEHAVIORS;

D O I：

10.1016/j.compstruct.2022.116373

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This work investigates the coupled effect on mechanical and electrical properties of carbon black dispersed in polyamide 6 and 6.6 matrices. The CB content is varied between 15 % and 25 % wt. The elastic modulus in-creases of 12 % by increasing the CB concentration. Results reveal the capability of CB to functionalize ther-moplastic polymers by activating conductive networks, as obtained over the percolation threshold of 13 % wt. The conductivity sensitivity to the mechanical strain is analyzed within direct (DC) and alternate current (AC) in the range of 0-100 kHz. Composite with lower CB concentrations exhibited a linear increase of the Gauge Factor (GF) with the frequency (from 2 to 4 at 20 %wt), while at 25 % wt of CB, the GF is 17 in DC regime and linearly decreases toward 6, at 100 kHz. A novel model for the estimation of the material Gauge Factor (GF) variation with the applied electric frequency is proposed.

引用

页数：9

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