Comparison of Pressure Sensing Properties of Carbon Nanotubes and Carbon Black Polymer Composites

Yoo, Jongchan; Kim, Dong‐Young; Kim, Hyun Woo; Hur, Oh−Nyoung; Park, Sunghoon

doi:10.3390/ma15031213

Cited by 16 publications

(11 citation statements)

References 41 publications

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“…Strain gauges are embedded in a substrate material, instead of being tiled over the substrates. In most current products, S-shaped strain gauges are fixed in symmetry but in opposing angles [ 31 ].…”

Section: Mechanisms Of Piezoresistive and Piezoelectric Techniquesmentioning

confidence: 99%

“…For example, carbon nanotubes and graphene-based sensors have high mechanical flexibility and stretchability; they can maintain high sensitivity under bending and pressing. Therefore, they can be used for PSD [ 4 , 5 , 7 , 12 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ].…”

Section: Comparison and Review Of Piezoresistive And Piezoelectric Ps...mentioning

confidence: 99%

“…When the external force is removed, if the deformation recovery time is longer than the average time per step, the measurement accuracy and sensitivity of PSD decreases [ 4 , 30 ]. Additionally, the inability to detect shear force is a shortcoming, as mentioned in [ 31 , 32 ]. Though metal liquid-based sensing material can overcome this problem, it has not been widely used.…”

Section: Challengesmentioning

confidence: 99%

“…Normal force causes vertical gauge strain, which is reflected in response height. Shear force causes gauge incline, which is reflected in response angle [ 31 ].…”

Section: Figurementioning

confidence: 99%

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Comparison between Piezoelectric and Piezoresistive Wearable Gait Monitoring Techniques

Zhang

Chen

et al. 2022

Materials

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Insole plantar stress detection (PSD) techniques play an important role in gait monitoring. Among the various insole PSD methods, piezoelectric- and piezoresistive-based architectures are broadly used in medical scenes. Each year, a growing number of new research outcomes are reported. Hence, a deep understanding of these two kinds of insole PSD sensors and state-of-the-art work would strongly benefit the researchers in this highly interdisciplinary field. In this context, this review article is composed of the following aspects. First, the mechanisms of the two techniques and corresponding comparisons are explained and discussed. Second, advanced materials which could enhance the performance of current piezoelectric and piezoresistive insole prototypes are introduced. Third, suggestions for designing insole PSD prototypes/products for different diseases are offered. Last, the current challenge and potential future trends are provided.

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Section: Mechanisms Of Piezoresistive and Piezoelectric Techniquesmentioning

confidence: 99%

Section: Comparison and Review Of Piezoresistive And Piezoelectric Ps...mentioning

confidence: 99%

Section: Challengesmentioning

confidence: 99%

“…Normal force causes vertical gauge strain, which is reflected in response height. Shear force causes gauge incline, which is reflected in response angle [ 31 ].…”

Section: Figurementioning

confidence: 99%

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Comparison between Piezoelectric and Piezoresistive Wearable Gait Monitoring Techniques

Zhang

Chen

et al. 2022

Materials

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“…Commonly used conductive fillers include carbon nanomaterials, such as graphene [11,12], carbon black (CB) [13][14][15], carbon nanotubes (CNTs) [16][17][18][19][20][21], and Ag nanowires (Ag NW) [22,23]. Among them, CNTs are 1D materials with a high aspect ratio; therefore, even if the range of strain increases, the electrical network can be maintained, which is advantageous for a stretchable piezoresistive system [2].…”

Section: Introductionmentioning

confidence: 99%

Design of a Smart Conducting Nanocomposite with an Extended Strain Sensing Range by Conjugating Hybrid Structures

2022

Self Cite

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In recent years, flexible and wearable strain sensors, consisting of a polymer matrix and a conducting filler, have received extensive attention owing to their physical advantages, such as being lightweight, stretchable, and having the potential for application to complex forms. However, achieving a low hysteresis of the relative change in resistance, wide sensing range, and reduced plastic deformation is still challenging. To address these issues, in this study, we developed hybrid conducting composites with a wide range of sensing abilities and low hysteresis. The bi-layer composites, comprising a carbon nanotube (CNT) composite layer with reinforced/conducting properties, and a natural rubber-based layer with extreme strain properties, could effectively circumvent their limitations. Compared to single-layer CNT composites, the bi-layer structure could increase the tensile strain with reduced plastic deformation, resulting in the prevention of surface cracks on the CNT composite. In addition, it has the benefit of measuring a wider sensing range, which cannot be measured in a single-CNT composite system. A cyclic stretching/releasing test was performed to demonstrate that the strain sensor exhibited excellent reproducibility. Our results can function as a useful design guide for stretchable sensor applications.

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Fully‐Printed Bionic Tactile E‐Skin with Coupling Enhancement Effect to Recognize Object Assisted by Machine Learning

Yu,

Mao,

et al. 2023

Adv Funct Materials

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In the pursuit of tactile sensation resembling human skin, the electronic skin (E‐skin) has long been a subject of interest and inspires the exploration of various biomimetic structures. Nevertheless, the exceptional functionality of living organisms arises from the synergistic interplay of multiple internal factors, i.e. the coupling enhancement effect, which has received limited attention in existing studies. Here, a tactile E‐skin featuring a multicoupled biomimetic structure that mimics three coupling elements found in the skin: Stratum spinosum, Meissner corpuscle, and Piezo2 protein, is proposed. By amalgamating their distinguishing characteristics, this bionic E‐skin surpasses the performance of conventional counterparts such as sensitivity as high as 388.5 kPa−1, hysteresis as low as 0.76%, and response times as short as 10 ms. Furthermore, its fabrication methodology of efficient 3D printing shows great advantages in terms of production cost and customization. Finally, the sensor is expanded to a 9 × 9 pixels array for a machine learning‐assisted intellisense system to recognize the fruits as a human does, achieving an accuracy of 91.4%. All of these prove the promising potential of this multicoupled biomimetic structure in wearable electronics, human–machine interface, soft robotics, and artificial sensing.

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Comparison of Pressure Sensing Properties of Carbon Nanotubes and Carbon Black Polymer Composites

Cited by 16 publications

References 41 publications

Comparison between Piezoelectric and Piezoresistive Wearable Gait Monitoring Techniques

Comparison between Piezoelectric and Piezoresistive Wearable Gait Monitoring Techniques

Design of a Smart Conducting Nanocomposite with an Extended Strain Sensing Range by Conjugating Hybrid Structures

Fully‐Printed Bionic Tactile E‐Skin with Coupling Enhancement Effect to Recognize Object Assisted by Machine Learning

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