3D geometrically structured PANI/CNT-decorated polydimethylsiloxane active pressure and temperature dual-parameter sensors for man–machine interaction applications

Wang, Yao; Mao, Hongye; Zhu, Pengcheng; Liu, Chenghao; Deng, Yuan

doi:10.1039/d0ta05651k

Cited by 65 publications

(56 citation statements)

References 36 publications

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“…The thermal resistance model [32] employed for simulation is illustrated in Figure 1a and how these parameters impact the temperature utilization has been discussed in detail. In this model, the heat flows from heat source (T H ) through thermal resistances of hot side (R H ), TE leg (R leg ) and the cold side (R C ) to the cold environment temperature (T C ).…”

Section: Thermal Resistance Model For Teg/skinmentioning

confidence: 99%

“…Thus, the key issues for developing organic TEGs (oTEGs) are the low heat transfer efficiency as well as mismatch in thermal impedance due to the configuration of organic TEGs (oTEGs) inconsistent with the direction of body heat flow. [31] In our previous work, 3D architecture design for organic TE devices has been proved as an effective strategy to overcome the thermal impedance mismatch, [32,33] while for the thermal interface design, little attention has been paid to organic TE devices, which is actually of the same importance for boosting thermal energy conversion from human body and is in urgent demand for wearable electronics applications.…”

Section: Introductionmentioning

confidence: 99%

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High‐performance Stretchable Organic Thermoelectric Generator via Rational Thermal Interface Design for Wearable Electronics

Wang

Zhou

et al. 2021

Advanced Energy Materials

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Compliant thermoelectric generators (TEGs) hold great promise in the field of self‐powered wearable electronics. Yet, the low heat transfer efficiency arising from large thermal resistance between elastic encapsulating materials and the contacted objects severely lowers the thermopower. This issue is much more challenging for organic TEG (oTEG) due to the high parasitic heat loss in the whole polymer system. Herein, guided by finite element analyses, a polydimethylsiloxane based composite coated with Cu is developed as a thermal interface without compromising the compliance of the oTEG, which possesses the merits of high thermal conductivity and significantly reduced thermal resistance, thus maximizing the temperature difference utilization ratio to 86%, which is 75.5% higher than for a routine oTEG. As a proof‐of‐concept, 50 pairs of p/n porous polyurethane/single‐wall carbon nanotube TE legs are integrated onto the designed substrate without further encapsulation. Both simulations and experiments on output performance under various thermal conditions are carried out, and show excellent agreement. The in situ output performance tests under various deformation conditions reveal the mechanical robustness of the oTEG. Finally, an oTEG functioning as a body heat harvester and an environment temperature sensor are demonstrated. The outstanding performances unambiguously demonstrate the success of the thermal interface design strategy for promoting oTEGs applied as wearable electronics.

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Section: Thermal Resistance Model For Teg/skinmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐performance Stretchable Organic Thermoelectric Generator via Rational Thermal Interface Design for Wearable Electronics

Wang

Zhou

et al. 2021

Advanced Energy Materials

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“…The pressure and temperature signals were decoupled because of the temperature independent DMSO treated aerogels display semiconductor to semimetal transition, thus the crosstalk effect can be avoided. Recently, Wang et al [34] also reported a pressure and temperature dual-parameter sensor composed of hydrophobic films and graphene/PDMS sponges. For pressure sensing, the obtained pressure sensor shows a sensitivity of > 15.22 kPa -1 with stability over > 3000 cycles via piezoresistive effect.…”

Section: Piezoresistive/thermoelectric-type Dual-parameter Sensorsmentioning

confidence: 99%

Recent progress in pressure and temperature tactile sensors: Principle, classification, integration and outlook

Yu¹,

Zhang²,

Deng³

2021

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Tactile sensors have received increasing research interest owing to the broad applications in areas of health monitoring, artificial intelligence, robotics, and prosthetics. The ability to understand and perceive touch and heat is of importance because it helps people to recognize objects, prevent injury, and provide heat information from grasped objects. However, bimodal tactile sensors often suffer from signal interference and complicated fabrication process. Numerous efforts have been undertaken to develop highly independent sensors based on different transduction principles as well as the device integration techniques. Here, strategies for improvement of main performance parameters such as sensitivity, sensing range, hysteresis, response/recovery time, and stability are discussed. A comprehensive overview of important progress in pressure and temperature tactile sensors in recent years is summarized. According to sensor units and transduction principles, temperature and pressure tactile sensors are categorized into two types: dual-parameter sensors and integrated bimodal sensors. Integration of tactile sensors from the viewpoint of power supply, wireless communication, and signal process circuit is given. Finally, challenges and outlook are provided and presented for pressure and temperature tactile sensors.

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“…To date, numerous polymers have been reported as matrixes for constructing flexible composite aerogels such as waterborne polyurethane (WPU), 13 vinylmethyldimethoxysilane (VMDMS) and vinyldimethylmethoxysilane (VDMMS), 14 cellulose nanocrystals (CNC) and lignin, 15 and poly(dimethylsiloxane). 16 Among these polymers, WPU is unique with respect to its elastomeric, thermoplastic, and thermosetting behavior and has become a good choice for the polymer matrix because of its excellent processability, nontoxicity, flexibility, and applicability properties. 17,18 CNC exhibits outstanding properties in terms of its biodegradability, high specific surface area, elastic modulus, order of crystallinity, and low thermal expansion.…”

Section: ■ Introductionmentioning

confidence: 99%

Flexible Waterborne Polyurethane/Cellulose Nanocrystal Composite Aerogels by Integrating Graphene and Carbon Nanotubes for a Highly Sensitive Pressure Sensor

Zhai

Zhang

Cui

et al. 2021

ACS Sustainable Chem. Eng.

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Flexible piezoresistive sensors with high sensitivity, low cost, and wide response ranges are urgently required due to the rapid development of wearable electronics. Here, carbon nanotubes (CNTs)/graphene/waterborne polyurethane (WPU)/cellulose nanocrystal (CNC) composite aerogels (CNTs/graphene/WC) were fabricated by facile solution mixing and freeze-drying technology for high-performance pressure sensors. WPU and CNC were constructed as a 3D structure skeleton, and the synergistic effect of CNTs and graphene was beneficial to enhancing the sensing performance. The obtained pressure sensor exhibits a highly porous network structure, remarkable mechanical properties (76.16 kPa), high sensitivity (0.25 kPa–1), an ultralow detection limit (0.112 kPa), and high stability (>800 cycles). More importantly, the piezoresistive sensor could be successfully used to detect various human motions such as finger bending, squatting–rising, walking, and running and effectively extract real-time information by the electrical signals. In addition, the CNTs/graphene/WC composite aerogel exhibits excellent thermal insulation performance, which can withstand 160 °C for a long time without any damage to the structure. The CNTs/graphene/WC composite aerogel, because of its thermal insulation property, endows the sensor with the potential for application in high-temperature environments. The results indicate that CNTs/graphene/WC composite aerogels possess high sensing performance and outstanding thermal insulation, which means that the aerogels could be used as flexible, wearable electronics.

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3D geometrically structured PANI/CNT-decorated polydimethylsiloxane active pressure and temperature dual-parameter sensors for man–machine interaction applications

Abstract:
Wearable sensors integrating multiple functionalities have emerged with great potentials in artificial smart systems for perceiving external stimuli such as strain, stress and temperature with high sensitivity simultaneously. Yet, it...

Cited by 65 publications

References 36 publications

High‐performance Stretchable Organic Thermoelectric Generator via Rational Thermal Interface Design for Wearable Electronics

High‐performance Stretchable Organic Thermoelectric Generator via Rational Thermal Interface Design for Wearable Electronics

Recent progress in pressure and temperature tactile sensors: Principle, classification, integration and outlook

Flexible Waterborne Polyurethane/Cellulose Nanocrystal Composite Aerogels by Integrating Graphene and Carbon Nanotubes for a Highly Sensitive Pressure Sensor

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3D geometrically structured PANI/CNT-decorated polydimethylsiloxane active pressure and temperature dual-parameter sensors for man–machine interaction applications

Abstract: Wearable sensors integrating multiple functionalities have emerged with great potentials in artificial smart systems for perceiving external stimuli such as strain, stress and temperature with high sensitivity simultaneously. Yet, it...

Cited by 65 publications

References 36 publications

High‐performance Stretchable Organic Thermoelectric Generator via Rational Thermal Interface Design for Wearable Electronics

High‐performance Stretchable Organic Thermoelectric Generator via Rational Thermal Interface Design for Wearable Electronics

Recent progress in pressure and temperature tactile sensors: Principle, classification, integration and outlook

Flexible Waterborne Polyurethane/Cellulose Nanocrystal Composite Aerogels by Integrating Graphene and Carbon Nanotubes for a Highly Sensitive Pressure Sensor

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Product

Resources

About

Abstract:
Wearable sensors integrating multiple functionalities have emerged with great potentials in artificial smart systems for perceiving external stimuli such as strain, stress and temperature with high sensitivity simultaneously. Yet, it...