Strain sensing behaviors of stretchable conductive polymer composites loaded with different dimensional conductive fillers

Chen, Jianwen; Li, Hua; Yu, Qizhou; Hu, Yanming; Cui, Xihua; Zhu, Yutian; Jiang, Wei

doi:10.1016/j.compscitech.2018.10.025

Cited by 103 publications

(48 citation statements)

References 46 publications

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“…This phenomenon has been observed in other CNT/polymer composites, which is mainly attributed to the competition between the destruction and reconstruction of conductive networks during cyclic loadings. [41,42,71] The present investigation showed that such a shoulder peak can be removed at lower strain rates (<0.1 mm s −1 ). Further, we also observed that the appearance of shoulder peak is more distinct at higher strain values ( Figure S3, Supporting Information).…”

Section: Electromechanical Performance Of the Stretchable Strain Sensorssupporting

confidence: 48%

“…[35][36][37][38][39] This new class of material is a mixture of viscoelastic polymer matrix (organic) and conductive fillers (inorganic) and have the potential to fulfil the requirements of wearable mechanical strain sensors. These conductive polymer composite materials can be realized using carbonaceous nanomaterials (e.g., carbon nanotubes [CNTs], [38][39][40][41][42][43][44] graphene [45] ), inorganic metallic nanomaterials (e.g., silver nanowires [AgNWs], [37,46] and nanoparticles [47] ), hydrogels, [48,49] etc. for body motion detection.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the percolation theory, [55] NCs can achieve an insulator/conductor transition when the filler content is high enough to build up the percolated conductive networks throughout the polymer matrix. [51] Among a variety of filler materials investigated, 1D conductive nanomaterial, such as CNTs [38][39][40][41][42][43][44] and metallic nanowires (NWs), [37,46] have drawn significant interest to realize NC for strain sensing applications. Interest in CNTs has been mainly driven because of its excellent mechanical properties, chemical inertness, and low cost.…”

Section: Introductionmentioning

confidence: 99%

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1D Nanomaterial‐Based Highly Stretchable Strain Sensors for Human Movement Monitoring and Human–Robotic Interactive Systems

Dahiya

Gil

Thireau

et al. 2020

Adv Elect Materials

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variety of flexible electronic devices such as tattoo-like sensory skin patches, [1-3] energy harvesters, [4] energy storage elements, [5,6] stretchable interconnects. [7] The astonishing progress in the technologies mentioned above have enabled a new technological drive called "Internet-of-Medical-Things (IoMT)," linking wearable devices/ sensors into a communication network for real-time or periodic patient-doctor communications. [8] The IoMT will help people to better monitor their health status by collecting subtle vital signs modifications and transferring to healthcare service providers. Part of the ongoing research efforts to develop IoMT is focused on the development of wearable sensors that can be embedded in clothing, [9-11] wrist watches, patches [12] and bands, [13-16] contact lenses, [17-21] tattoo-like sensory skin patches (electronic skin), [2,22] etc. to enable around-the-clock vital signs monitoring, human-machine interactive systems, [2] and as bionic ligaments in soft robotics. [23] Among various types of wearable mechanical sensors such as piezoresistive, piezoelectric, and capacitive, the piezoresistive-based strain sensors are gaining a lot of interest as they provide high sensitivity with simple device design and readout circuits [24-30] for vital signs monitoring and soft robotics. Piezoresistive strain sensors are based on the change of electrical properties of the material when subjected to mechanical deformation. Piezoresistive This paper describes a facile strategy of micromolding-in-capillary process to fabricate stretchable strain sensors wherein, the sensing material is wrapped within silicone rubber (Dragon Skin [DS]) to form a sandwichlike structure. Two different 1D sensing materials are exploited to fabricate and study strain sensing performance of such device structure, namely multi-walled carbon nanotubes (MWCNTs) and silver nanowires (AgNWs). The fabricated strain sensors using MWCNT exhibits wide sensing range (2-180%), and moderately high sensing performance with outstanding durability (over 6000 cycles). It is found that MWCNT presents a strong straindependent character in the 45-120% elongation regime. On the other hand, very high gauge factor of >10 6 is achieved using AgNWs at 30% strain with good stability (over 100 cycles). Sensing mechanisms for both 1D conductive sensing materials are discussed. They can be applied for human motion monitoring such as finger, knee, and wrist bending movements to enable human physiological parameters to be registered and analyzed continuously. They are also employed in multichannel and interactive electronic system to be used as a control mechanism for teleoperation for robotic end-effectors. The developed sensors have potential applications in health diagnosis and human-machine interaction.

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Section: Electromechanical Performance Of the Stretchable Strain Sensorssupporting

confidence: 48%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

1D Nanomaterial‐Based Highly Stretchable Strain Sensors for Human Movement Monitoring and Human–Robotic Interactive Systems

Dahiya

Gil

Thireau

et al. 2020

Adv Elect Materials

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“…To address these needs, organic/inorganic hybrid 'nanocomposite (NC) materials' are being investigated [3]- [5]. This new class of stretchable material is a mixture of viscoelastic polymer matrix (organic) and conductive fillers (inorganic).…”

Section: Introductionmentioning

confidence: 99%

Stretchable Strain Sensors for Human Movement Monitoring

Dahiya

Gil

Azémard

et al. 2020

2020 Symposium on Design, Test, Integration &Amp; Packaging of MEMS and MOEMS (DTIP)

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Stretchable strain sensors based on organic/inorganic hybrid NanoComposite (NC) have gained wide interest owing to their potential application in health diagnosis, soft robotics, and wearable electronics. This paper describes a facile strategy of micromolding-in-capillary process to fabricate stretchable strain sensors wherein, the sensing material (i.e. one-dimensional (1D) material) is wrapped within silicone rubber (Dragon Skin™ (DS)) to form a sandwich-like structure. The fabricated strain sensors exhibit superb stretchability (wide strain sensing range of up to 180%), and moderately high sensing performance with outstanding stability and durability. They can be applied for human movement monitoring such as finger movements to enable human physiological parameters to be registered and analyzed continuously.

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“…Besides, large amounts of carbon nanofillers are consumed to ensure good conductivity for reliable strain sensing in the elastomer‐based CPCs, which in turn results in limited deformation of the conductive network under low tensile strain. As such, using hybrid fillers, like CNTs plus carbon black (CB) or CNTs plus graphene, were reported to enhance the piezoresistive sensitivity of CPCs by forming three‐dimensional (3D) joint networks in polymers. This strategy has two main advantages: (a) improving the dispersion of both carbon nanofillers; (b) creating more and looser filler connection sites in the jointly percolated networks .…”

Section: Introductionmentioning

confidence: 99%

Hybrid systems of three‐dimensional carbon nanostructures with low dimensional fillers for piezoresistive sensors

Sang

Manas‐Zloczower

2019

Polymer Composites

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As an alternative of single filler system, hybrid fillers system is beneficial for the fabrication of elastomer‐based piezoresistive strain sensors with high strain sensitivity for structural health monitoring and human motion detection. However, a comprehensive understanding for the effect of the secondary filler dimensionality on piezoresistive strain sensor sensitivity by hybrid carbon nanofillers strategy is missing. Here, we report a comparative study about the effect of branched carbon nanostructures (CNS, three‐dimensional, 3D) combined with carbon black (CB, 0D) or carbon nanotubes (CNT, 1D) on the piezoresistive behavior of thermoplastic polyurethane (TPU)‐based composites. At either the same total filler content or similar electrical resistivity, using CNS‐CB hybrid is more efficient than using CNS alone or CNS‐CNT hybrid for improving piezoresistive sensitivity of the TPU composites. For instance, the composite 1.5CNS‐1CB has a gauge factor (GF) of 21 and 99 at strain ε = 50 and 100%, respectively, while the composites 2.5CNS and 1.5CNS‐1CNT have GF values of 4.3 and 9.1 at strain ε = 50% and 14 and 20 at strain ε = 100%, respectively. Besides, the TPU composite with CNS‐CB shows a larger response to finger bending (50° on an index finger) by comparison with that contains only CNS, indicating potential applications for human motion detection. This study introduces a facile way to fabricate strain‐sensitive sensors aimed at strain of 50%–100%, strengthening understanding the selection of hybrid carbon nanofillers with different dimensionalities to optimize piezoresistive sensor design.

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Strain sensing behaviors of stretchable conductive polymer composites loaded with different dimensional conductive fillers

Cited by 103 publications

References 46 publications

1D Nanomaterial‐Based Highly Stretchable Strain Sensors for Human Movement Monitoring and Human–Robotic Interactive Systems

1D Nanomaterial‐Based Highly Stretchable Strain Sensors for Human Movement Monitoring and Human–Robotic Interactive Systems

Stretchable Strain Sensors for Human Movement Monitoring

Hybrid systems of three‐dimensional carbon nanostructures with low dimensional fillers for piezoresistive sensors

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