Advancing the pressure sensing performance of conductive CNT/PDMS composite film by constructing a hierarchical-structured surface

Zhao, Ye; Shen, Taoyu; Zhang, Minyue; Yin, Rui; Zheng, Yanjun; Liu, Hu; Sun, Hongling; Liu, Chuntai; Shen, Changyu

doi:10.1016/j.nanoms.2021.10.002

Cited by 30 publications

(18 citation statements)

References 58 publications

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“…Demand has been growing for a strain sensor, which is a device that transduces mechanical deformation into other parameters such as electrical resistance, capacitance, electric charge, and optical wavelengths, which can be easily and directly measured. The well-known traditional strain sensors based on metals, alloys, and semiconductors exhibit poor flexibility and low strain range despite having a very high sensitivity. − However, recently, there have been studies of conducting polymer composites (CPCs), which have attracted tremendous attention because of their excellent electromechanical properties for various application devices , including strain sensors. − Such CPCs include carbon-based materials (graphite, carbon black, , carbon nanotubes, − and graphene − ), metallic nanowires, − and intrinsic conducting polymers as active components in various devices. Graphene itself has emerged as a promising electrically conductive nanofiller in the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Electromechanically Durable Graphene Oxide-Embedded Elastomer via Simultaneous Corporation of Siloxane/Polyol Based on the Dual Secondary Bond Architecture

Palicpic

Khadka

Yim

2022

ACS Appl. Polym. Mater.

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Graphene, an electrically conductive reinforcement material, is investigated for its strain sensing capabilities in the form of a thermoplastic polyurethane−graphene oxide (TPU−GO) composite. The electromechanical properties of the graphene-based strain sensors at different loading concentrations of 3, 5, and 7 wt % GO were studied. The TPU−GO strain sensor with the 7 wt % GO loading concentration was found to endow the most sensitive and stable electromechanical performance. The TPU−GO strain sensor was better with the addition of polyethylene glycol (PEG) (TPU−GO−PEG), which behaves as a binder, and was further enhanced with the formation of a hybrid silica structure (SiO 2 ) (TPU−GO−SiO 2 ) in the polymer matrix. Its strain sensing performance was further examined in terms of stretch−release cycles at different strains, durabilities, and strain speeds. Notably, the TPU−GO−PEG−SiO 2 strain sensor exhibited the highest gauge factor (GF = 9.14); significantly enhanced mechanical properties, thermal stability, and electrical response; and long-term durability (>20,000 cycles). This is attributed to the homogeneous dispersion of GO sheets and a strong interfacing interaction between the conductive filler and the TPU matrix aided by siloxane and polyether via hydrogen bonds.

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Section: Introductionmentioning

confidence: 99%

Electromechanically Durable Graphene Oxide-Embedded Elastomer via Simultaneous Corporation of Siloxane/Polyol Based on the Dual Secondary Bond Architecture

Palicpic

Khadka

Yim

2022

ACS Appl. Polym. Mater.

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“…To illustrate the merits of our design more intuitively, the sensor performances, including sensitivity, sensing range, and limited detection, were compared with that of other devices fabricated from patterned surfaces in previous works (Figure 5b and Table S1, Supporting Information). [41][42][43][56][57][58][59][60][61][62][63][64] In addition, the pressure sensors exhibit unnoticeable hysteresis (Figure S10, Supporting Information), no dependence on test frequency (Figure S11, Supporting Information), good durability (Figures S12 and S13, Supporting Information), and excellent reliability without obvious degradation after loading-unloading at 10 kPa for 5000 cycles (Figure 5c).…”

Section: Resultsmentioning

confidence: 99%

Stiffness Engineering of Ti₃C₂T_X MXene‐Based Skin‐Inspired Pressure Sensor with Broad‐Range Ultrasensitivity, Low Detection Limit, and Gas Permeability

Hui

Wang

Yang

et al. 2022

Adv Materials Inter

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of flexible sensors, piezoresistive pressure sensors are of great interest as electronic skins, [19][20][21] wearable monitors, [22][23][24] and human-machine interfaces [25,26] for their easy signal readout and collection, simple device structure, low energy consumption, and high sensitivity. [27] For instance, remote healthcare becomes possible with the help of flexible mechanosensors, which can be directly attached to the human body enabling timely and wireless acquisition of vital physiological signals via continuously monitoring the blood pressure, heartbeat speed, and joint movement. [28,29] Moreover, pressure sensors can provide haptic feedback when combined with robotic arms, improving the reliability and efficacy of industrial production. [30] Nevertheless, the bottleneck existing in the field of pressure sensor design remains to be the trade-off between sensitivity and sensing range.Human skin, which is the largest organ of the body, possesses enormous functions of protection, excretion, temperature regulation, and perception. [7] Skin basically contains epidermis as the protective layer, dermis as a cushion layer for buffering stress/strain, mechanoceptor connected with dermis for amplifying and efficiently transferring tactile stimuli, and sweat glands for temperature regulation. [31,32] Inspired by the interlocked microstructures of epidermis and dermis, piezoresistive pressure sensor consisting of two conductive layers stacked in a face-to-face manner has been widely explored due to its large output current changes upon loading and its performance has been much enhanced by introducing High sensitivity and broad sensing range are considered as two crucial parameters toward flexible and wearable piezoresistive pressure sensors for human healthcare, human-machine interfaces, robots, and so on. Though various strategies are developed to improve the sensor performance, the trade-off between sensitivity and sensing range remains a bottleneck for device design. Besides, conventional pressure sensors without gas permeability normally cause discomfort and inflammation to the human skin. Herein, enlightened by the functions and structure of the human skin, this article proposes a stiffness engineering strategy for constructing Ti 3 C 2 T X MXene-based porous spinosum structure to boost sensitivity over a broad detection range. Consequently, the as-fabricated pressure sensor exhibits superior performance, including ultrahigh sensitivity of 367 kPa −1 over a widened detection range, a low detection limit of 1 Pa, good gas permeability, and exceptional mechanical stability over 5000 compression cycles at high pressure. Benefiting from such excellent performances, a variety of fancy applications in detecting static pressure, including physiological signals, stealth transmission, the magnitude and spatial distribution of external tactile stimuli, as well as differentiating spatiotemporal tactile stimuli, are demonstrated. It is believed that stiffness engineering is a universal strategy for tailoring the performan...

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“…A resistive pressure sensor has an active layer that is conducive for measurement and elastic for response to pressure, which can be made by coating the conductive nanomaterial, such as nanowires (NWs) [ 21 ], reduced graphene oxide (rGO) [ 22 ], carbon nanotubes (CNTs), graphene, or MXene [ 23 ], on the elastic polymer or by combining the conductive material and the polymer to form the composite film [ 24 ]. When pressure is applied, the shape, contact area, and resistivity of the active layer are altered, and the resistance is changed accordingly [ 25 ].…”

Section: Tactile and Force Sensors For Hmimentioning

confidence: 99%

Recent Progress of Tactile and Force Sensors for Human–Machine Interaction

Pan

Cui

et al. 2023

Sensors

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Human–Machine Interface (HMI) plays a key role in the interaction between people and machines, which allows people to easily and intuitively control the machine and immersively experience the virtual world of the meta-universe by virtual reality/augmented reality (VR/AR) technology. Currently, wearable skin-integrated tactile and force sensors are widely used in immersive human–machine interactions due to their ultra-thin, ultra-soft, conformal characteristics. In this paper, the recent progress of tactile and force sensors used in HMI are reviewed, including piezoresistive, capacitive, piezoelectric, triboelectric, and other sensors. Then, this paper discusses how to improve the performance of tactile and force sensors for HMI. Next, this paper summarizes the HMI for dexterous robotic manipulation and VR/AR applications. Finally, this paper summarizes and proposes the future development trend of HMI.

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Advancing the pressure sensing performance of conductive CNT/PDMS composite film by constructing a hierarchical-structured surface

Cited by 30 publications

References 58 publications

Electromechanically Durable Graphene Oxide-Embedded Elastomer via Simultaneous Corporation of Siloxane/Polyol Based on the Dual Secondary Bond Architecture

Electromechanically Durable Graphene Oxide-Embedded Elastomer via Simultaneous Corporation of Siloxane/Polyol Based on the Dual Secondary Bond Architecture

Stiffness Engineering of Ti₃C₂T_X MXene‐Based Skin‐Inspired Pressure Sensor with Broad‐Range Ultrasensitivity, Low Detection Limit, and Gas Permeability

Recent Progress of Tactile and Force Sensors for Human–Machine Interaction

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Advancing the pressure sensing performance of conductive CNT/PDMS composite film by constructing a hierarchical-structured surface

Cited by 30 publications

References 58 publications

Electromechanically Durable Graphene Oxide-Embedded Elastomer via Simultaneous Corporation of Siloxane/Polyol Based on the Dual Secondary Bond Architecture

Electromechanically Durable Graphene Oxide-Embedded Elastomer via Simultaneous Corporation of Siloxane/Polyol Based on the Dual Secondary Bond Architecture

Stiffness Engineering of Ti3C2TX MXene‐Based Skin‐Inspired Pressure Sensor with Broad‐Range Ultrasensitivity, Low Detection Limit, and Gas Permeability

Recent Progress of Tactile and Force Sensors for Human–Machine Interaction

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Stiffness Engineering of Ti₃C₂T_X MXene‐Based Skin‐Inspired Pressure Sensor with Broad‐Range Ultrasensitivity, Low Detection Limit, and Gas Permeability