Highly flexible and multifunctional CNTs/TPU fiber strain sensor formed in one-step via wet spinning

Liu, Wanwan; Xue, Changhu; Long, Xiaoyun; Yu, Rong; Chen, Zhi; Zhang, Wei

doi:10.1016/j.jallcom.2023.169641

Cited by 17 publications

(12 citation statements)

References 50 publications

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“…In general, sensitivity and sensing strain range are vital parameters of strain sensors. Figure 5F shows data for some strain sensors reported in previous literature 32–41 . It can be seen that they have narrow sensing ranges and/or low GFs.…”

Section: Resultsmentioning

confidence: 96%

“…Figure 5F shows data for some strain sensors reported in previous literature. [32][33][34][35][36][37][38][39][40][41] It can be seen that they have narrow sensing ranges and/or low GFs. Herein, we have achieved a desirable integration of a large strain range and high GF (GF = 51.7 at a strain of 400% in the reversible regime), permitting broad application, especially in large-scale human motion detection.…”

Section: Sensing Performancementioning

confidence: 99%

“…The conductive pathways gradually broke, leading to a rapid increase in resistance until the yarn eventually fractures. Figure 5B illustrates the [32][33][34][35][36][37][38][39][40][41] equivalent circuit diagrams, which involve numerous parallel resistances arising from the breakage of the conductive network of CNTs. During the stretching process, failure of parallel circuits occurred continually, that is, the disconnection of CNT conductive paths occurred, resulting in an increase in circuit resistance (also seen in Figure 4A).…”

Section: Sensing Performancementioning

confidence: 99%

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Strain sensor based on polyurethane/carbon nanotube elastic conductive spiral yarn with high strain range and sensitivity

Nie,

Chen,

Tang

et al. 2024

Polymer Composites

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Wearable flexible electronic strain sensor devices have gained significant attention in recent years due to their potential for detecting human motion in various scenarios. However, the development of strain sensors with high sensitivity across a wide range of strains remains a major challenge. We present herein a novel strain sensor based on a graded structure thermoplastic polyurethane (TPU)/carbon nanotube (CNT) composite yarn with significantly enhanced mechanical performance imparted by the designed structure. The twisted CNTs/TPU spiral yarn demonstrated a fracture elongation of up to 1066% while maintaining charge conductivity under high‐strain conditions. Moreover, it exhibited sensitive changes in resistance versus tensile strain, excellent repeatability, and stability. As a strain sensor, it achieved a gauge factor (GF) of 67.2 within a strain range below 50%, reaching 51.7 in a strain range exceeding 150%. With a fast response time of 0.12 s, it enabled accurate identification of movements in different body parts. These findings highlight the broad application potential of the designed spiral yarn strain sensor in areas such as human motion monitoring and human–computer interaction.Highlights Prepares a flexible strain sensor with graded‐structure (CNT‐fiber‐yarn). Shows high sensitivity and a wide strain response range Reveals the conductive model of strain sensor.

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Section: Resultsmentioning

confidence: 96%

Section: Sensing Performancementioning

confidence: 99%

Section: Sensing Performancementioning

confidence: 99%

See 1 more Smart Citation

Strain sensor based on polyurethane/carbon nanotube elastic conductive spiral yarn with high strain range and sensitivity

Nie,

Chen,

Tang

et al. 2024

Polymer Composites

Self Cite

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“…Among these structures, conductive three-dimensional fiber network structure produces significant resistance changes during deformation, leading to excellent sensing performances with high sensitivity. − The performance of the fiber network structure relies on the loose network, large specific surface area, and strong matrix. Most preparation methods of the fiber networks such as electrospinning, microfluidic spinning, and wet spinning were limited by the high cost, complex preparation steps, and low production efficiency. Thus, it is a challenge to prepare cheaper and more productive conductive fiber networks as the core components of flexible pressure sensors.…”

Section: Introductionmentioning

confidence: 99%

“…16−18 ance of the fiber network structure relies on the loose network, large specific surface area, and strong matrix. Most preparation methods of the fiber networks such as electrospinning, 19 microfluidic spinning, 20 and wet spinning 21 were limited by the high cost, complex preparation steps, and low production efficiency. Thus, it is a challenge to prepare cheaper and more productive conductive fiber networks as the core components of flexible pressure sensors.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Sensors Made with Conductive Microframework and Biomass Hydrogel for Detecting Packaging Pressure and Food Freshness

Liu,

Chen,

et al. 2024

ACS Appl. Mater. Interfaces

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Food packaging detection devices have attracted attention to optimize storage situations and reduce food spoilage. However, low-cost and highly sensitive multifunctional sensors for detecting both food freshness and packaging pressure are still lacking. In this study, a multifunctional sensor was developed consisting of a MXene coated alcohol-soluble polyurethane fiber network (MXene/APU) and composite biohydrogel films made of konjac glucomannan, chitosan, and blueberry anthocyanin (KCB). Based on the pressure sensitivity of MXene/APU and the color changes of KCB in response to pH values, the sensor can detect internal package bulging, external squeezing, and food deterioration. The pressure sensor shows a sensitivity of 1.16 kPa −1 , a response time of 200 ms, a wide strain range of 1092%, and stability over multiple loops. The pressure sensor could detect human motion and identify surface morphologies. The excellent sensor performance was attributed to the porous structure and large specific surface area of microfiber networks, conductivity of MXene nanosheets, and protective effect of KCB films coated on the conductive membrane. Besides, the microfluidic blow-spinning method used to prepare microfiber networks showed the advantages of low energy consumption and high production efficiency. Based on the color changes of blueberry anthocyanin loaded in KCB films in response to pH, the sensor realized sensitive spoilage detection of food containing protein. This study provides a new multifunctional food packaging sensing device and a greater understanding of the optimization and application of related devices.

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Recent Research on Preparation and Application of Smart Joule Heating Fabrics

Ye,

Zhao,

Yang

et al. 2023

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Multifunctional wearable heaters have attracted much attention for their effective applications in personal thermal management and medical therapy. Compared to passive heating, Joule heating offers significant advantages in terms of reusability, reliable temperature control, and versatile coupling. Joule‐heated fabrics make wearable electronics smarter. This review critically discusses recent advances in Joule‐heated smart fabrics, focusing on various fabrication strategies based on material‐structure synergy. Specifically, various applicable conductive materials with Joule heating effect are first summarized. Subsequently, different preparation methods for Joule heating fabrics are compared, and then their various applications in smart clothing, healthcare, and visual indication are discussed. Finally, the challenges faced in developing these smart Joule heating fabrics and their possible solutions are discussed.

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Highly flexible and multifunctional CNTs/TPU fiber strain sensor formed in one-step via wet spinning

Cited by 17 publications

References 50 publications

Strain sensor based on polyurethane/carbon nanotube elastic conductive spiral yarn with high strain range and sensitivity

Strain sensor based on polyurethane/carbon nanotube elastic conductive spiral yarn with high strain range and sensitivity

Multifunctional Sensors Made with Conductive Microframework and Biomass Hydrogel for Detecting Packaging Pressure and Food Freshness

Recent Research on Preparation and Application of Smart Joule Heating Fabrics

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