Stretchable and compressible strain sensor based on carbon nanotube foam/polymer nanocomposites with three-dimensional networks

Hao, Bin; Mu, Lei; Ma, Qing; Yang, Sudong; Ma, Peng‐Cheng

doi:10.1016/j.compscitech.2018.05.017

Cited by 68 publications

(45 citation statements)

References 46 publications

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“…According to the work of Zha et al., 16 the presence of CB at weight fraction higher than 3% inside the composite emphasizes the reorientation of MWCNT and thus the sliding phenomenon. The resulting losses of conductive paths inside the matrix are revealed by the variations of the electrical impedance This result is similar to those obtained by Hao et al., 14 Ku-Herrera and Aviles, 11 Mitrakos, 15 Spinelli et al. 3 and Wang et al.…”

Section: Resultssupporting

confidence: 87%

Section: Introductionsupporting

confidence: 90%

“…According to the work of Zha et al, 16 the presence of CB at weight fraction higher than 3% inside the composite emphasizes the reorientation of MWCNT and thus the sliding phenomenon. The resulting losses of conductive paths inside the matrix are revealed by the variations of the electrical impedance This result is similar to those obtained by Hao et al, 14 Ku-Herrera and Aviles, 11 Mitrakos, 15 Spinelli et al 3 and Wang et al 12,13 During stress relaxation, the strain of the specimen is kept constant. The electrical resistance of the composites during stress relaxation does not change significantly, suggesting minor modifications of the microstructure of the conductive network formed by CB and MWCNT.…”

Section: Electrical Response Of Composites Under Quasi-static Testssupporting

confidence: 85%

“…Thus, the CNTs orientate in the transverse direction of the mechanical loading, leading to fewer contacts in the conductive network and higher electrical resistance. Similar results were obtained in the studies by Hao et al, 14 Mitrakos 15 and Spinelli et al 3 An interesting work published by Zha et al 16 investigated the influence of adding carbon black (CB) on the electrical response during quasi-static compression of a silicone/CNT composite. Adding CB helps to obtain a homogeneous dispersion of MWCNT inside the matrix, as CB particles act as bonding between the MWCNT and the ethylene-propylene-diene monomer (EPDM) macromolecules.…”

Section: Introductionsupporting

confidence: 79%

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Experimental characterization of the quasi-static and dynamic piezoresistive behavior of multi-walled carbon nanotubes/elastomer composites

Penvern

Langlet

Gratton³

et al. 2020

Journal of Reinforced Plastics and Composites

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Multi-walled carbon nanotube (MWCNT)/elastomer composites exhibit a piezoresistive behavior, i.e. their resistivity changes when they are subjected to mechanical loading. Thus, these materials can be used as strain or pressure sensors. In this paper, the effect of carbon nanotube weight fraction on the sensitivity and repeatability of the electrical response of multi-walled carbon nanotube/ethylene–propylene–diene monomer composites is investigated, under quasi-static and dynamic compression (using split Hopkinson pressure bars). It was found that multi-walled carbon nanotube weight fraction and the strain rate have a major influence on the piezoresistivity of such composites. Although all samples exhibited a good repeatability of their electrical response under quasi-static cyclic compression, those with a lower multi-walled carbon nanotube weight fraction had a higher sensitivity to strain. An increase in the electrical resistance during compression was observed under both quasi-static and dynamic compression. Reversible movements of multi-walled carbon nanotube in the transverse direction of compression increased the average inter-multi-walled carbon nanotube distance under quasi-static compression, leading to higher values of resistance. After the dynamic tests, the Young’s modulus of the composites decreased by about 45% and the electrical resistance increased a hundredfold, indicating damage induced by dynamic loading.

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Section: Resultssupporting

confidence: 87%

Section: Introductionsupporting

confidence: 90%

Section: Electrical Response Of Composites Under Quasi-static Testssupporting

confidence: 85%

Section: Introductionsupporting

confidence: 79%

See 2 more Smart Citations

Experimental characterization of the quasi-static and dynamic piezoresistive behavior of multi-walled carbon nanotubes/elastomer composites

Penvern

Langlet

Gratton³

et al. 2020

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

show abstract

“…Carbon nanotubes represent the foundation for most of the conventional stretchable strain sensors 1,[8][9][10][11][12][13] , owing to performance characteristics which considerably exceed from known metal/metal oxides or organic semiconductors based sensors [14][15][16] , including large stretchability, high piezoresistivity and long term stability under mechanical strain. More precisely, single-walled carbon nanotubes (SWCNTs) possess one dimensional morphology with high aspect ratio to offer high internal piezoresistivity for use in strain sensors 17,18 .…”

mentioning

confidence: 99%

A water-resilient carbon nanotube based strain sensor for monitoring structural integrity

et al. 2019

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Monitoring structural integrity during and after extreme events such as an earthquake or a tsunami is a mundane yet important task that still awaits a workable solution. Currently available stress sensors are not sufficiently robust and are affected by humidity. Insufficient information about crack formation preceding structural failure increases risk during rescue operations significantly. Designing durable stress sensors that are not affected by harsh and changing environment and do not fail under catastrophic conditions is a fundamental challenge. To address this problem, we developed a stress sensor based on creased singlewalled carbon nanotubes (SWCNTs) encapsulated in a non-fluorinated superhydrophobic coating. The creased SWCNT film was fabricated and integrated in polydimethylsiloxane (PDMS) to provide a highly linear response under elastic deformation. The non-fluorinated water-repellent coating was fabricated by spray-coating the film with nanosilica particles, providing water resistance during elastic deformation.The compact design and superior water resistance of the sensor, along with its appealing linearity and 1 large stretchability, demonstrates the scalability of this approach for fabricating efficient strain sensors for applications in infrastructure and robotic safety management as well as advanced wearable sensors.Monitoring structural integrity during and after extreme events such as an earthquake or a tsunami is a mundane yet important task that still awaits a workable solution. Additionally, the mechanical frame strength of transportation must be continuously monitored for sufficient safety. Currently available strain sensors are not sufficiently robust and are affected by humidity. A water-proof strain sensor would be applicable for infrastructure safety management in harsh environments. Such a harmless water-proof strain sensor could also be used as an advanced wearable sensor. Insufficient information about crack formation preceding structural failure increases risk during rescue operations significantly. To address this problem, we developed a strain sensor based on creased single-walled carbon nanotubes (SWCNTs) encapsulated in a non-fluorinated superhydrophobic coating. The SWCNT film was fabricated and integrated in polydimethylsiloxane (PDMS) to provide a highly linear response under elastic deformation.The non-fluorinated water-repellent coating was fabricated by spray-coating the film with nanosilica particles, providing water resistance during elastic deformation. The compact design and superior water resistance of the sensor, along with its appealing linearity and large stretchability, demonstrates the scalability of this approach for fabricating efficient strain sensors for applications in infrastructure and robotic safety management.Governments must guarantee safety and present environments to preserve life while maintaining a comfortable urban landscape with minimal economic burden. Particularly, numerous infrastructures, such as buildings, bridges, dams, and tunnels, in adva...

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Rational Assembly of Liquid Metal/Elastomer Lattice Conductors for High‐Performance and Strain‐Invariant Stretchable Electronics

Wang

Xia

Zhu

et al. 2021

Adv Funct Materials

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Highly stretchable and conductive composites have gained tremendous research interests due to the imperative demands in the fields of stretchable electronics and soft robotics. However, it is challenging to maintain the original performance of the composites under complex external deformations. Here, a one‐step dual‐material 3D printing technique is developed to rationally assemble liquid metal (LM) into an elastomer lattice. The 3D interconnected and deformable liquid conductive network is supported by a highly ordered and robust polydimethylsiloxane lattice skeleton, yielding the resultant composites high electrical conductivity (1.98 × 106 S m−1), stretchability (180%), and electromagnetic interference (EMI) shielding effectiveness (72 dB). Unlike those composites with dispersed fillers, the LM/elastomer lattice composites deliver negligible electromechanical coupling, showing a negative resistance change of only −2% at a large tensile strain of 100%. The composites also exhibit strain‐invariant EMI shielding performance in a strain range of 0–100%, and present exceptional stability over 1000 rigorous cycles of stretching and releasing. The applications of the composites in flexible display circuits, microwave shielding layer, and EMI shields in wireless power transmission systems are demonstrated. The current findings suggest an effective strategy for fabricating LM‐based composites with precisely controlled and unprecedented multi‐functionality.

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Stretchable and compressible strain sensor based on carbon nanotube foam/polymer nanocomposites with three-dimensional networks

Cited by 68 publications

References 46 publications

Experimental characterization of the quasi-static and dynamic piezoresistive behavior of multi-walled carbon nanotubes/elastomer composites

Experimental characterization of the quasi-static and dynamic piezoresistive behavior of multi-walled carbon nanotubes/elastomer composites

A water-resilient carbon nanotube based strain sensor for monitoring structural integrity

Rational Assembly of Liquid Metal/Elastomer Lattice Conductors for High‐Performance and Strain‐Invariant Stretchable Electronics

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