Ionic liquid enabled flexible transparent polydimethylsiloxane sensors for both strain and temperature sensing

Jiang, Niu; Hu, Dengwen; Xu, Youquan; Chen, Jianwen; Chang, Xiaohua; Zhu, Yutian; Li, Yongjin; Guo, Zhanhu

doi:10.1007/s42114-021-00262-9

Cited by 96 publications

(43 citation statements)

References 51 publications

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“…[ 63 ] It should be noted that the elastomer matrix is the key component of piezoresistive IFS, and provides a soft and stretchable basal frame. Usually, silica gel is used as an elastomer matrix with a low Young's modulus, such as elastomer silicon, [ 62 ] polydimethylsiloxane (PDMS), [ 64,65 ] and Ecoflex. [ 66 ] Chossat et al.…”

Section: Ionic Sensing Mechanismsmentioning

confidence: 99%

“…[63] It should be noted that the elastomer matrix is the key component of piezoresistive IFS, and provides a soft and stretchable basal frame. Usually, silica gel is used as an elastomer matrix with a low Young's modulus, such as elastomer silicon, [62] polydimethylsiloxane (PDMS), [64,65] and Ecoflex. [66] Chossat et al developed a flexible sensor that could withstand 100% strain by using an elastomer silicon with embedded flow channels filled with an ionic electrolyte.…”

Section: Ionic Piezoresistive Effectmentioning

confidence: 99%

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Ionic Flexible Sensors: Mechanisms, Materials, Structures, and Applications

Zhao

Wang

Tang

et al. 2022

Adv Funct Materials

113

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Over the past few decades, flexible sensors have been developed from the "electronic" level to the "iontronic" level, and gradually to the "ionic" level. Ionic flexible sensors (IFS) are one kind of advanced sensors that are based on the concept of ion migration. Compared to conventional electronic sensors, IFS can not only replicate the topological structures of human skin, but also are capable of achieving tactile perception functions similar to that of human skin, which provide effective tools and methods for narrowing the gap between conventional electronics and biological interfaces. In this review, the latest research and developments on several typical sensing mechanisms, compositions, structural design, and applications of IFS are comprehensively reviewed. Particularly, the development of novel ionic materials, structural designs, and biomimetic approaches has resulted in the development of a wide range of novel and exciting IFS, which can effectively sense pressure, strain, and humidity with high sensitivity and reliability, and exhibit self-powered, self-healing, biodegradability, and other properties of the human skin. Furthermore, the typical applications of IFS in artificial skin, human-interactive technologies, wearable health monitors, and other related fields are reviewed. Finally, the perspectives on the current challenges and future directions of IFS are presented.

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Section: Ionic Sensing Mechanismsmentioning

confidence: 99%

“…[63] It should be noted that the elastomer matrix is the key component of piezoresistive IFS, and provides a soft and stretchable basal frame. Usually, silica gel is used as an elastomer matrix with a low Young's modulus, such as elastomer silicon, [62] polydimethylsiloxane (PDMS), [64,65] and Ecoflex. [66] Chossat et al developed a flexible sensor that could withstand 100% strain by using an elastomer silicon with embedded flow channels filled with an ionic electrolyte.…”

Section: Ionic Piezoresistive Effectmentioning

confidence: 99%

Ionic Flexible Sensors: Mechanisms, Materials, Structures, and Applications

Zhao

Wang

Tang

et al. 2022

Adv Funct Materials

113

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“…CPCs can be fabricated using a range of methods such as dispersing conductive fillers into flexible polymer matrices [ 16 ], depositing [ 17 ], transferring [ 18 ], or printing a conductive layer on prefabricated flexible polymer substrates [ 2 ]. However, the CPCs-based strain sensors are subject to low sensitivity and narrow working ranges because their conductive paths are often fragile and thus likely to be broken during stretching [ 19 , 20 , 21 ]. To solve these drawbacks, research has been conducted to achieve a wide working range by constructing various material configurations such as serpentine structures [ 22 ], wrinkled structures [ 23 ], and crack structures [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Coated Fibrous Tubes for Highly Stretchable Strain Sensors Having High Linearity

Zhou

et al. 2022

Nanomaterials

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Strain sensors are currently limited by an inability to operate over large deformations or to exhibit linear responses to strain. Producing strain sensors meeting these criteria remains a particularly difficult challenge. In this work, the fabrication of a highly flexible strain sensor based on electrospun thermoplastic polyurethane (TPU) fibrous tubes comprising wavy and oriented fibers coated with carboxylated multiwall carbon nanotubes (CNTs) is described. By combining spraying and ultrasonic-assisted deposition, the number of CNTs deposited on the electrospun TPU fibrous tube could reach 12 wt%, which can potentially lead to the formation of an excellent conductive network with high conductivity of 0.01 S/cm. The as-prepared strain sensors exhibited a wide strain sensing range of 0–760% and importantly high linearity over the whole sensing range while maintaining high sensitivity with a GF of 57. Moreover, the strain sensors were capable of detecting a low strain (2%) and achieved a fast response time whilst retaining a high level of durability. The TPU/CNTs fibrous tube-based strain sensors were found capable of accurately monitoring both large and small human body motions. Additionally, the strain sensors exhibited rapid response time, (e.g., 45 ms) combined with reliable long-term stability and durability when subjected to 60 min of water washing. The strain sensors developed in this research had the ability to detect large and subtle human motions, (e.g., bending of the finger, wrist, and knee, and swallowing). Consequently, this work provides an effective method for designing and manufacturing high-performance fiber-based wearable strain sensors, which offer wide strain sensing ranges and high linearity over broad working strain ranges.

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“…Flexible sensors have tremendous adhibitions in various different fields of energy storage devices, health‐care monitoring system, motion signal collection, robotic control, etc 1–10 . The pressure sensor is an integral part of flexible sensors with the ability to transduce pressure into directly observable or recordable electrical signals, 11–15 such as current, capacitance, and resistance, which makes an important role to monitor human movements and physical conditions 16–20 .…”

Section: Introductionmentioning

confidence: 99%

High strength and anti‐freezing piezoresistive pressure sensor based on a composite gel

Tie

Mao

Zhang

et al. 2022

Polymers for Advanced Techs

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Piezoresistive sensors constructed by functionalized elastic gel have received broad research by virtue of the visible advantages, such as low-cost, stability of signal collection, and excellent compress strain. Herein, a new method about improved in situ polymerization of pyrrole monomer coated on polyurethane (PU) sponge was developed, which endowed the sponge with high and homogeneous conductivity. Then, a

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Ionic liquid enabled flexible transparent polydimethylsiloxane sensors for both strain and temperature sensing

Cited by 96 publications

References 51 publications

Ionic Flexible Sensors: Mechanisms, Materials, Structures, and Applications

Ionic Flexible Sensors: Mechanisms, Materials, Structures, and Applications

Carbon Nanotube Coated Fibrous Tubes for Highly Stretchable Strain Sensors Having High Linearity

High strength and anti‐freezing piezoresistive pressure sensor based on a composite gel

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