3D-printed stretchable sensor based on double network PHI/PEDOT:PSS hydrogel annealed with cosolvent of H2O and DMSO

Cheng, Xiuyan; Peng, Shuqiang; Wu, Lixin; Sun, Qing‐Fu

doi:10.1016/j.cej.2023.144058

Cited by 13 publications

(6 citation statements)

References 26 publications

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“…Among them, the conductive active material allows the sensor to maintain favorable conductive properties and long-term sensing characteristics. For example, carbon-based materials − (carbon nanotubes, graphene), metal nanomaterials , (gold and silver nanowires), conductive polymers , (PEDOT: PSS), etc. have been widely used.…”

Section: Introductionmentioning

confidence: 99%

High-Fidelity, Low-Hysteresis Bionic Flexible Strain Sensors for Soft Machines

Li,

Yao,

Meng

et al. 2024

ACS Nano

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Stretchable flexible strain sensors based on conductive elastomers are rapidly emerging as a highly promising candidate for popular wearable flexible electronic and softmechanical sensing devices. However, due to the intrinsic limitations of low fidelity and high hysteresis, existing flexible strain sensors are unable to exploit their full application potential. Herein, a design strategy for a successive threedimensional crack conductive network is proposed to cope with the uncoordinated variation of the output resistance signal arising from the conductive elastomer. The electrical characteristics of the sensor are dominated by the successive crack conductive network through a greater resistance variation and a concise sensing mechanism. As a result, the developed elastomer bionic strain sensors exhibit excellent sensing performance in terms of a smaller overshoot response, a lower hysteresis (∼2.9%), and an ultralow detection limit (0.00179%). What's more, the proposed strategy is universal and applicable to many conductive elastomers with different conductive fillers (including 0-D, 1-D, and 2-D conductive fillers). This approach improves the sensing signal accuracy and reliability of conductive elastomer strain sensors and holds promising potential for various applications in the fields of e-skin and soft robotic systems.

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Section: Introductionmentioning

confidence: 99%

High-Fidelity, Low-Hysteresis Bionic Flexible Strain Sensors for Soft Machines

Li,

Yao,

Meng

et al. 2024

ACS Nano

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“…27,28 The highly intrinsic conductive PEDOT/PSS polymer chain can not only provide good conductivity for the conductive hydrogels but also impart the conductive hydrogels with high strain-sensing performance. 29 The PEDOT and PSS polymer chains carry positive and negative charges, respectively. 30 Therefore, PEDOT/PSS can form an electrostatic interaction with some charged components in the hydrogel.…”

Section: Introductionmentioning

confidence: 99%

“…Conducting polymers, such as polypyrrole, polyaniline, and poly(3,4-ethylenedioxythiophene)-doped poly(styrenesulfonate) (PEDOT/PSS), have been often doped into a hydrogel network as conductive fillers to produce conductive hydrogels. , Among them, PEDOT/PSS displays unique advantages in preparing conductive hydrogels owing to its simple preparation, high electrical conductivity, and good water dispersibility. , The highly intrinsic conductive PEDOT/PSS polymer chain can not only provide good conductivity for the conductive hydrogels but also impart the conductive hydrogels with high strain-sensing performance . The PEDOT and PSS polymer chains carry positive and negative charges, respectively .…”

Section: Introductionmentioning

confidence: 99%

Tough and Strain-Sensitive Organohydrogels Based on MXene and PEDOT/PSS and Their Effects on Mechanical Properties and Strain-Sensing Performance

Bi,

Qu,

Sheng

et al. 2024

ACS Appl. Mater. Interfaces

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Conductive hydrogels have shown promising application prospects in the field of flexible sensors, but they often suffer from poor mechanical properties, low sensitivity, and lack of frost resistance. Herein, we report a tough, highly sensitive, and antifreeze strain sensor assembled from a conductive organohydrogel composed of a dual-cross-linked polyacrylamide and poly(vinyl alcohol) (PVA) network, as well as MXene nanosheets as nanofillers and poly(3,4-ethylenedioxythiophene)doped poly(styrenesulfonate) (PEDOT/PSS) as the main conducting component (PPMP-OH organohydrogel). The tensile strength and toughness of PPMP-OH had been greatly enhanced by MXene nanosheets due to the mechanical reinforcement of MXene nanosheets, as well as various strong noncovalent interactions formed in the organohydrogels. The PPM 1 P-OH organohydrogels showed a tensile strength of 1.48 MPa at 772% and a toughness of 5.59 MJ/m 3 . Moreover, the conductivity and strain-sensing performance of PPMP-OH were significantly improved by PEDOT/PSS, which can form hydrogen bonds with PVA and electrostatic interactions with MXene. This was greatly beneficial for constructing a uniformly distributed and stable 3D conductive network and helped to obtain strain-dependent resistance of PPMP-OH. The strain sensors assembled from PPMP 1 -OH exhibited a high sensitivity of 5.16, a wide range of detectable strains up to 500%, and a short response time of 122 ms, which can effectively detect various physiological activities of the human body with high stability. In addition, the corresponding pressure sensor array also showed high sensitivity in identifying pressure magnitude and position.

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“…Traditional strategies to create 3D PEDOT-based conducting monoliths encompass bottom-up and top-down methods. The former focuses on polythiophene chemistry, , where the 3,4-ethylenedioxythiophene (EDOT) monomer undergoes in situ oxidative polymerization and is primarily doped upon a 3D substrate, such as bricks, liberating Fe 3+ oxidant, and initiating the polymerization. The latter depends on either mixing with inert polymers or in situ polymerization of EDOT within a hydrogel matrix to construct an interpenetrating polymer network.…”

Section: Introductionmentioning

confidence: 99%

“…The former focuses on polythiophene chemistry, , where the 3,4-ethylenedioxythiophene (EDOT) monomer undergoes in situ oxidative polymerization and is primarily doped upon a 3D substrate, such as bricks, liberating Fe 3+ oxidant, and initiating the polymerization. The latter depends on either mixing with inert polymers or in situ polymerization of EDOT within a hydrogel matrix to construct an interpenetrating polymer network. Beyond polymers, specific small molecules, referred to as secondary dopants, − can induce gelation of PEDOT:PSS dispersion, facilitating the favorable molding of 3D structures, concomitantly leading to a substantially increased conductivity.…”

Section: Introductionmentioning

confidence: 99%

Omnidirectional Printing of PEDOT:PSS for High-Conductivity Spanning Structures

Xing,

Wang,

Qian

et al. 2023

ACS Appl. Mater. Interfaces

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3D-printed stretchable sensor based on double network PHI/PEDOT:PSS hydrogel annealed with cosolvent of H2O and DMSO

Cited by 13 publications

References 26 publications

High-Fidelity, Low-Hysteresis Bionic Flexible Strain Sensors for Soft Machines

High-Fidelity, Low-Hysteresis Bionic Flexible Strain Sensors for Soft Machines

Tough and Strain-Sensitive Organohydrogels Based on MXene and PEDOT/PSS and Their Effects on Mechanical Properties and Strain-Sensing Performance

Omnidirectional Printing of PEDOT:PSS for High-Conductivity Spanning Structures

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