Ultrafast dynamic response of waterproof stretchable strain sensors based on wrinkle-templated microcracking

Li, Lele; Zheng, Yang; Liu, Enping; Wang, Juanjuan; Han, Xue; Jiang, Shichun; Xu, Fan; Cao, Yanping; Lu, Conghua

doi:10.1039/d2ta04261d

Cited by 7 publications

(6 citation statements)

References 75 publications

(222 reference statements)

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“…Under 50% strain, the sensor was repeatedly stretched five times at speeds of 20, 40, and 60 mm/min. Figure 8E shows that it retains excellent stability under different speeds of stretching 59,60 . This proves that the conductive composite can adapt to both fast and slow strain changes in practical applications.…”

Section: Resultsmentioning

confidence: 70%

Stretchable, stabilized‐conductive XNBR/PEDOT:PSS composites based on bottom‐deposited structure

Gu,

Liu,

Wang

et al. 2024

Polymer Engineering & Sci

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Conductive composites have attracted much attention due to its high conductivity, stretchability, and sensitivity. However, designing conductive composites with relatively stable conductivity under 100% deformation using simple methods remains a challenge. In this work, we employ a simple and straightforward approach to prepare a poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) solution. Based on the conductivity‐optimized PEDOT:PSS (5.95 S/cm), it was combined with carboxylated acrylonitrile‐butadiene rubber latex (XNBRL) to make a flexible conductive material with a unique bottom‐deposited structure. The incorporation of PEDOT:PSS establishes an interconnected conductive network within the XNBR, enhancing both the tensile strength (from 0.31 to 1.24 MPa) and conductivity of the composites. Remarkably, even at 100% strain, the resistance change (ΔR/R0) in the composite remains minimal (<2), demonstrating its exceptional flexibility and high electrical conductivity while maintaining relatively stable resistance during cyclic stretching at 50% deformation. Moreover, the conductive composite can maintain good relative resistance stability under different tensile rates and different strains. This conductive XNBR/PEDOT:PSS composite has promising application prospects in medical devices, which require relatively stable and high conductivity over a relatively large deformation.Highlights A simple method to increase the electrical conductivity of aqueous PEDOT:PSS. Flexible conductive composite with a small change in ΔR/R0. Enables rigid PEDOT to be used in stretchable electronic devices. Construction of 3D conductive network and bottom deposition structure.

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Section: Resultsmentioning

confidence: 70%

Stretchable, stabilized‐conductive XNBR/PEDOT:PSS composites based on bottom‐deposited structure

Gu,

Liu,

Wang

et al. 2024

Polymer Engineering & Sci

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“…These specialized structural designs can reduce hysteresis, improve strain sensitivity and accommodate strains to enhance stretch ability. [32][33][34][35][36] How to utilize the structural design and material trade-offs of flexible strain sensors for high measurement factor, high stretch ability, high linearity, and durability is the focus of our attention and research. 37 A micro-cracked composite wrinkled structure (SEBS@MCW-CNT) fiber strain sensor has been reported to have an ultra-wide sensing range of 0-600%, but a measurement factor of only 1.0676 in the tensile state.…”

Section: Introductionmentioning

confidence: 99%

“…The use of engineered structures such as micro‐cracks, folds and porous structures that can produce substantial changes at small strains is beneficial in obtaining high performance flexible strain sensors. These specialized structural designs can reduce hysteresis, improve strain sensitivity and accommodate strains to enhance stretch ability 32–36 . How to utilize the structural design and material trade‐offs of flexible strain sensors for high measurement factor, high stretch ability, high linearity, and durability is the focus of our attention and research 37 .…”

Section: Introductionmentioning

confidence: 99%

High‐performance XSBR‐based flexible strain sensors enabled by pleated microcrack structure

Huang,

Wang,

Gong

et al. 2024

J of Applied Polymer Sci

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Flexible strain sensors are attracting attention in areas such as medical monitoring sensing and rehabilitation therapy monitoring due to their powerful ability to sense, process, transmit and display complex information. However, it is an urgent challenge to realize the trade‐off between excellent performances such as high sensitivity, high linearity, wide strain sensing range and high durability. Herein, we prepare stretchable conductive composites with wrinkle composite micro‐crack structure by combining carboxystyrene butadiene rubber (XSBR) layer and carboxymethyl cellulose@Ag nanowire‐CNTs (CMC@AgNWs‐CNTs) conductive layer. Based on interfacial interactions, it can be adapted to different needs by adjusting the thickness of the strain sensing layer. When the thickness of the strain sensing layer is 4 μm, the strain sensor has a wide sensing range (strain capacity up to 300%) and high sensitivity (strain sensing factor of 484). At a thickness of 8 μm, the strain sensing performance exhibits a wide strain range, high linear fit and good cyclic stability. This work provides a new research idea to improve the comprehensive performance of flexible strain sensors and the contradiction between wide sensing range, high sensitivity and high linearity.

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“…The flexible strain sensors can be realized by depositing or coating functional units such as metal films, 19–22 conducting polymers, 10,13,15 and two-dimensional materials 23,24 on soft substrates. Due to the flexibility, bendability and stretchability of the soft substrates, the sensors can well fit to the non-planar human skins or other curved surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8][9][10] As an important component of the wearable system, exible strain sensors have been the main research direction for the development of future intelligent devices. [11][12][13][14][15][16][17][18] The exible strain sensors can be realized by depositing or coating functional units such as metal lms, [19][20][21][22] conducting polymers, 10,13,15 and two-dimensional materials 23,24 on so substrates. Due to the exibility, bendability and stretchability of the so substrates, the sensors can well t to the non-planar human skins or other curved surfaces.…”

Section: Introductionmentioning

confidence: 99%

High-performance flexible strain sensors based on silver film wrinkles modulated by liquid PDMS substrates

Xu,

Chen,

et al. 2023

RSC Adv.

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Ultrafast dynamic response of waterproof stretchable strain sensors based on wrinkle-templated microcracking

Abstract: A wrinkle-templated microcracking mechanism involved in a strain-sensing bilayer configuration provides a universal strategy to fabricate high-performance waterproof strain sensors with ultrafast dynamic response ability.

Cited by 7 publications

References 75 publications

Stretchable, stabilized‐conductive XNBR/PEDOT:PSS composites based on bottom‐deposited structure

Stretchable, stabilized‐conductive XNBR/PEDOT:PSS composites based on bottom‐deposited structure

High‐performance XSBR‐based flexible strain sensors enabled by pleated microcrack structure

High-performance flexible strain sensors based on silver film wrinkles modulated by liquid PDMS substrates

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