Improved strain sensing property of functionalised multiwalled carbon nanotube/polyaniline composites in TPU matrix

Sobha, A; Narayanankutty, Sunil K.

doi:10.1016/j.sna.2015.06.012

Cited by 50 publications

(35 citation statements)

References 42 publications

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“…Noteworthy, for all composites during dynamic loadings, double-peak patterns were observed. Such behavior is commonly noted for other piezoresistive CECs, [19,44,53] and is mainly related to the creep and slow stress relaxation of CECs under fast loading and unloading at room temperature. [62,63]…”

Section: Piezoresistive Behaviormentioning

confidence: 74%

“…To understand the piezoresistive sensitivity of these composites, the gauge factor (G F ), defined by the normalized instantaneous change of resistance (∆R/R 0 ) over strain (ε), that is, G F = ((∆R/R 0 )/ε), can be used to evaluate piezoresistive sensors. [53][54][55] High sensitivity, namely larger G F , is more promising for strain sensing applications. Conventional sensors, relying on a geometrical change of the conductive path, have G F in the range 2-5.…”

Section: Piezoresistive Behaviormentioning

confidence: 99%

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Effect of Solvent on Segregated Network Morphology in Elastomer Composites for Tunable Piezoresistivity

Sang

Guo

et al. 2019

Macro Materials & Eng

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Flexible, light‐weight, and wearable electronics have significant potential for the development of Internet of Things. Flexible sensors with tunable piezoresistive properties are in high demand for various practical applications. Herein, different morphology thermoplastic polyurethane (TPU)/ carbon nanostructure (CNS) composites with segregated network are obtained by swelling the TPU powders using various solvents. The better solvent for TPU, dimethylformamide (DMF), renders the composites with 0.7 wt% CNS stronger polymer‐filler interactions, resulting in significantly improved piezoresistive sensitivity at strain larger than 150%. Also the gauge factors (GFs) for these composites are 9.7 in the range 0–60% strain and 19.3 for 60–100% strain. In contrast, the composites with ethanol (EtOH) and tetrahydrofuran (THF) which swell less the TPU show delayed increase in piezoresistivity and GFs of 2.2 and 3.5 for strain up to 100%, respectively, suggesting potential applications for stretchable conductors.

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Section: Piezoresistive Behaviormentioning

confidence: 74%

Section: Piezoresistive Behaviormentioning

confidence: 99%

Effect of Solvent on Segregated Network Morphology in Elastomer Composites for Tunable Piezoresistivity

Sang

Guo

et al. 2019

Macro Materials & Eng

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“…The compression causes the changes in the conductive network of the composite [16][17][18][19][20][21][22][23], which results in the variation of the electrical property of the composite (e.g., the resistance, capacitance, etc.). Therefore, the composite is a pressure sensitive material [24][25][26][27][28][29][30], and can be used to develop the pressure sensor [31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Compressive capacitance relaxation of carbon black filled silicone rubber composite

Wang

2017

Polymer Composites

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The changes in the capacitance of carbon black filled silicone rubber composite during the compressive stress relaxation, which is defined as the “compressive capacitance relaxation,” is researched. During the compressive stress relaxation, the capacitance of the composite increases gradually and tends to be stable over time. Based on the viscoelastic theory, the mathematical model for the compressive capacitance relaxation is established. The capacitance relaxation times and the stable normalized capacitance decrease with the increase of the conductive phase content. The capacitance relaxation times hold constant, and the stable normalized capacitance increases with the increase of the initial stress. POLYM. COMPOS., 39:3446–3451, 2018. © 2017 Society of Plastics Engineers

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“…1 Addition of carbon nanotube enhances the properties of polymer even at very low concentrations due to their large aspect ratio and ultra-high conductivity. 2 These CNT based polymer composites have potential uses in many fields, such as strain sensors, damping augmentation, super capacitors, electromagnetic radiation shield coatings, and actuators. [3][4][5][6][7] Polyaniline (PANI) was discovered over 150 years ago; however, only since the early 1980s has PANI captured the intense attention of the scientific community mainly due to the rediscovery of its high electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Polyaniline/multi-walled carbon nanotube composites for structural vibration damping and strain sensing

et al. 2016

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Polyaniline (PANI)/11% Multi-carbon nanotubes (MWCNT) nanocomposites sensors were synthesized through an in situ polymerization method. Frits compression method was adopted to make PANI/MWCNT. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) tests results showed that this technique produced a coating of PANI onto the MWCNT, which indicated that CNT were well dispersed in the polymer matrix. Several tests were run to evaluate the sensor's capabilities. The free end vibration test results showed that the double sided attachment of the sensor had higher damping ratio values than single sided attachment. Also, damping ratios were higher when the sensor was placed at the clamped end. Further, the strain sensing properties of PANI/MWCNT sensors were compared with the conventional foil strain gage. The dynamic sensing test results showed that over the range of 10-1000 Hz, the PANI/MWCNT composite sensor was consistently superior to the traditional foil strain gage for sensing purposes.

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Improved strain sensing property of functionalised multiwalled carbon nanotube/polyaniline composites in TPU matrix

Cited by 50 publications

References 42 publications

Effect of Solvent on Segregated Network Morphology in Elastomer Composites for Tunable Piezoresistivity

Effect of Solvent on Segregated Network Morphology in Elastomer Composites for Tunable Piezoresistivity

Compressive capacitance relaxation of carbon black filled silicone rubber composite

Polyaniline/multi-walled carbon nanotube composites for structural vibration damping and strain sensing

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