An implantable, compatible and networkable nanocomposite piezoresistive sensor for in situ acquisition of dynamic responses of CFRPs

Su, Yiyin; Yang, Jie; Liao, Yaozhong; Zhou, Pengyu; Xu, Lei; Zhou, Li; Su, Zhongqing

doi:10.1016/j.compscitech.2021.108747

Cited by 20 publications

(7 citation statements)

References 42 publications

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“…h) Comparison of film thickness and gauge factor of flexible sensors in multiple studies. [ 3,6e,6f,10,18 ]…”

Section: Resultsmentioning

confidence: 99%

“…The sensors include acoustic emission (AE) sensors, accelerometers, strain gauges, etc. [3] However, these conventional sensors rely on rigid or flat substrates with low deformability, so their applicability is reduced when the CFRP components have nonplane surfaces. [4] Therefore, flexible sensors are more promising in this situation.Flexible sensors have shown good performance in damage detection of composite materials, [3,5] human health monitoring, [6] and human-computer interaction.…”

mentioning

confidence: 99%

“…Flexible sensors have shown good performance in damage detection of composite materials, [3,5] human health monitoring, [6] and human-computer interaction. [7] According to the different working mechanisms, flexible sensors can be divided into capacitive, piezoelectric, and piezoresistive sensing types.…”

mentioning

confidence: 99%

See 2 more Smart Citations

A Flexible Conformal Piezoresistive Sensor Based on Electrospinning for Deformation Monitoring of Carbon Fiber‐Reinforced Polymer

Cheng

Cao

et al. 2023

Adv Eng Mater

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Carbon fiber‐reinforced polymer (CFRP) materials are widely applied in various areas as key structure components. The structural health monitoring of the CFRP components is crucial to prevent catastrophic failure. However, the nonplane surfaces of CFRP components hinder the attaching of monitoring sensors with hard substrates. Therefore, the substrate conditions for sensor preparation are mainly considered in this study. To adapt the proposed sensors to the curved substrate, including nondevelopable surfaces, electrospinning method is used to prepare conformal piezoresistive fiber films, in which polymethyl methacrylate is served as the matrix and carbon nanotubes are utilized as the conductive filler. The piezoresistive fibers covered on CFRP substrates have a gauge factor up to 207.95 and can response to the strain less than 0.05%. Moreover, the sensor also has high durability and the ability to follow the dynamic excitation signals with as high as 50 Hz.

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“…h) Comparison of film thickness and gauge factor of flexible sensors in multiple studies. [ 3,6e,6f,10,18 ]…”

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

A Flexible Conformal Piezoresistive Sensor Based on Electrospinning for Deformation Monitoring of Carbon Fiber‐Reinforced Polymer

Cheng

Cao

et al. 2023

Adv Eng Mater

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“…Taking advantage of the electromechanical coupling effect, piezoceramics have been utilized in nondestructive testing sensors for detecting abnormal vibration conditions of engineering assets in real‐time. [ 23 ] Though the bulky sensors comprised of piezoelectric wafers or composites have shown promising capabilities in structural health monitoring, installing external devices will increases the burden and breaks the integrity of the equipment due to their heavy weights and fixed geometries. [ 12 ] To overcome the limitations, in this study, facilitated by the FTS process, we directly fabricate the piezoceramic thin film (BCZT) onto the curved surface of airplane wing to show the potential application of on‐site structural health monitoring.…”

Section: Resultsmentioning

confidence: 99%

3D Conformal Fabrication of Piezoceramic Films

et al. 2022

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Piezoceramic films are an essential class of energy-conversion materials that have been widely used in the electronics industry. Although current methods create a great freedom for fabricating high-quality piezoceramic films, it requires well-controlled synthesis conditions, including special high-cost equipment and planar substrates particularly. The limited substrate selections hinder the applications of piezoceramic films in 3D conformal structures where most objects possess complex curvilinear surfaces. To overcome such limitations, a fast, energy-efficient, and cost-effective approach, named flame treated spray (FTS) coating, is developed for preparing piezoceramic films on free-form surfaces. The flame treatment significantly enhances the hydrophilicity of a substrate, assisting in forming a uniform and continuous thin film. The followed spray coating deposits hundreds of nanometers to several micrometers thick films on 3D free-form surfaces. Given the size controllability and arbitrary surface compatibility of the FTS method, a highly conformal piezoelectric tactile sensor array (4 × 4) is assembled on a spherical surface for mimicking robot fingers and an on-site thin-film sensor on the wing of an aircraft model to monitor the vibration in real-time during flight. The FTS film deposition offers a highly promising methodology for the application of functional thin-film from micro-to marcoscale devices, regardless of conformal problems.

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“…The vertical impact load caused lateral expansion of the smart composite and increased the average CNT-CNT distance due to the Poisson effect. Consequently, the tunneling resistance increased, and part of the CNT conductive network was broken, resulting in fewer conductive paths (Su et al, 2021a). The reduced number of conductive networks was caused by an immediate increase of 0.25 O in macroscopic resistance.…”

Section: Impact Damage Sensingmentioning

confidence: 99%

Self-sensing and self-healing smart fiber-reinforced thermoplastic composite embedded with CNT film

Zhao

Liu

Li³

et al. 2023

Journal of Intelligent Material Systems and Structures

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Impacts can degrade the strength of composite structures; thus, impact damages should be monitored and repaired. In this study, a novel composite consisting of carbon nanotube film and glass fiber-reinforced thermoplastic was thermoformed. The fabricated smart composite demonstrated self-sensing and self-healing capabilities for damage caused by low-energy impacts. Elastic deformation of the composite caused by a 0.5-J impact was monitored from the immediate change in resistance of approximately 0.25 Ω. Internal damage such as tears and debonding was detected in real time by monitoring the permanent resistance variation of approximately 0.4 Ω using a Wheatstone bridge with a 3-J impact on the smart composite. This difference occurs because a 3-J impact discontinues the conductive path of the carbon nanotubes and changes the total resistance of the smart composite. The internal damage caused by a 3-J impact was repaired through the Joule heat effect when 0.7 MPa and 55 V were applied to heat the composite to 330°C. A three-point bending test demonstrated that the self-healing efficiency of the smart composite reached 87% in terms of flexural strength.

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An implantable, compatible and networkable nanocomposite piezoresistive sensor for in situ acquisition of dynamic responses of CFRPs

Cited by 20 publications

References 42 publications

A Flexible Conformal Piezoresistive Sensor Based on Electrospinning for Deformation Monitoring of Carbon Fiber‐Reinforced Polymer

A Flexible Conformal Piezoresistive Sensor Based on Electrospinning for Deformation Monitoring of Carbon Fiber‐Reinforced Polymer

3D Conformal Fabrication of Piezoceramic Films

Self-sensing and self-healing smart fiber-reinforced thermoplastic composite embedded with CNT film

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