Enhanced sensing performance of EVA/LDPE/MWCNT piezoresistive foam sensor for long-term pressure monitoring

Asghari, Narges; Hassanian-Moghaddam, Davood; Javadi, Azizeh; Ahmadi, Mostafa

doi:10.1016/j.cej.2023.145055

Cited by 12 publications

(4 citation statements)

References 87 publications

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“…Sensing Material Selection and Substrate Composite Technology Design. Although the performance of the flexible pressure sensor has greatly improved in recent years, with the maximum stress range exceeding 1000 kPa and sensitivity increasing by 2 to 3 orders of magnitude compared to conventional strain gauge, 119,120 these excellent parameters cannot be displayed on the same sensor at the same time. Typically, strain sensors prepared with conductive materials with high aspect ratios, such as one-dimensional CNT 121 and metal nanowires, have a high elastic modulus, 122 but their sensitivity is relatively low.…”

Section: ■ Optimize Strategymentioning

confidence: 99%

Research Progress of Flexible Piezoresistive Sensors Based on Polymer Porous Materials

Han,

Li,

et al. 2024

ACS Sens.

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Flexible piezoresistive sensors are in high demand in areas such as wearable devices, electronic skin, and human−machine interfaces due to their advantageous features, including low power consumption, excellent bending stability, broad testing pressure range, and simple manufacturing technology. With the advancement of intelligent technology, higher requirements for the sensitivity, accuracy, response time, measurement range, and weather resistance of piezoresistive sensors are emerging. Due to the designability of polymer porous materials and conductive phases, and with more multivariate combinations, it is possible to achieve higher sensitivity and lower detection limits, which are more promising than traditional flexible sensor materials. Based on this, this work reviews recent advancements in research on flexible pressure sensors utilizing polymer porous materials. Furthermore, this review examines sensor performance optimization and development from the perspectives of three-dimensional porous flexible substrate regulation, sensing material selection and composite technology, and substrate and sensing material structure design.

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Section: ■ Optimize Strategymentioning

confidence: 99%

Research Progress of Flexible Piezoresistive Sensors Based on Polymer Porous Materials

Han,

Li,

et al. 2024

ACS Sens.

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“…The Janus structure characterized by distinct properties on each side, provides a viable approach for constructing multifunctional electronics 30–32 . MWCNTs emerge as promising conductive fillers for EMI shielding, demonstrating advantages including excellent electrical conductivity, mechanical flexibility, cost‐effectiveness, and a high aspect ratio 33,34 . Incorporating MWCNTs into the asymmetrical nature of Janus membranes allows for the integration of DC‐type sensing and electromagnetic shielding, offering a potential and effective alternative to address the challenges associated with EMI.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic shielding Janus membrane for direct current‐type pressure and sliding sensing

Feng,

Lv,

Liu

et al. 2024

J of Applied Polymer Sci

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Facing increasing electromagnetic radiation pollution, soft sensors with electromagnetic interference (EMI) shielding is highly desirable. Here, flexible electromagnetic shielding [polyacrylonitrile/Fe3O4/polyaniline]//[multiwalled carbon nanotube/polyvinyl pyrrolidone] (denoted [PAN/Fe3O4/PANI]//[MWCNT/PVP]) Janus membrane is reported for pressure and sliding sensing. The [PAN/Fe3O4/PANI] layer of Janus membrane as the force and sliding sensing unit can generate direct current‐type (DC‐type) voltage signals by conducting polymer/metal Schottky junction, whereas [MWCNT/PVP] layer serves as main electromagnetic shielding unit. Under the vertical force and horizontal sliding of aluminum (Al) foil, it can output DC‐type voltage signals based on the Schottky contact. The performance of [PAN/Fe3O4/PANI]//[MWCNT/PVP] Janus membrane for pressure and sliding sensing is appropriately explored and assessed. Moreover, the Janus membrane exhibits excellent shielding effects with average EMI shielding effectiveness (SE) of 37.54 dB in 8.2–12.4 GHz (X‐Band) frequency ranges. Thus, based on the asymmetrical double‐layer structure, soft DC‐type sensor with EMI shielding is achieved, showing utilization potential in wearable electronics and intelligent robots.

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“…27,28 Moreover, ethylene-vinyl acetate (EVA) copolymer with good flexibility and impact resistance is often used as foam materials for impact protection. 29,30 Thus, the combination of a shear stiffening material and EVA to prepare light porous impact resistant composites may further improve its mechanical–thermal coupling protection performance. Meanwhile, the introduction of phase change materials is also an attractive solution to improve the overall properties.…”

Section: Introductionmentioning

confidence: 99%

A lightweight porous shear stiffening composite foam with excellent mechanical–thermal coupling protection performance

Xuan,

Wang,

Liu

et al. 2024

J. Mater. Chem. C

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Enhanced sensing performance of EVA/LDPE/MWCNT piezoresistive foam sensor for long-term pressure monitoring

Cited by 12 publications

References 87 publications

Research Progress of Flexible Piezoresistive Sensors Based on Polymer Porous Materials

Research Progress of Flexible Piezoresistive Sensors Based on Polymer Porous Materials

Electromagnetic shielding Janus membrane for direct current‐type pressure and sliding sensing

A lightweight porous shear stiffening composite foam with excellent mechanical–thermal coupling protection performance

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