Carbon nanomaterials based films for strain sensing application—A review

Yee, Min Juey; Mubarak, Nabisab Mujawar; Abdullah, Ezzat Chan; Khalid, Mohammad; Walvekar, Rashmi; Karri, Rama Rao; Nizamuddin, Sabzoi; Numan, Arshid

doi:10.1016/j.nanoso.2019.100312

Cited by 70 publications

(26 citation statements)

References 128 publications

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“…The conductive material can be filler type or deposited on the surface of the microstructured elastomer, thus increasing the contact area between the conductive components. Furthermore, carbon nanotube (CNT) materials under external pressure expressed piezoelectric effect, and Yee et al [206] presented the fabrication techniques and performances of CNTs-based strain sensors in a critical review. Abot et al [207] reported strain gauge sensor configurations using CNT wires, the numerical modelling of their piezoresistive response, and the parametric analysis schemes that determined the highest sensor sensitivity to mechanical loading.…”

Section: Strain/pressure Sensorsmentioning

confidence: 99%

E-Skin: The Dawn of a New Era of On-Body Monitoring Systems

et al. 2021

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Real-time “on-body” monitoring of human physiological signals through wearable systems developed on flexible substrates (e-skin) is the next target in human health control and prevention, while an alternative to bulky diagnostic devices routinely used in clinics. The present work summarizes the recent trends in the development of e-skin systems. Firstly, we revised the material development for e-skin systems. Secondly, aspects related to fabrication techniques were presented. Next, the main applications of e-skin systems in monitoring, such as temperature, pulse, and other bio-electric signals related to health status, were analyzed. Finally, aspects regarding the power supply and signal processing were discussed. The special features of e-skin as identified contribute clearly to the developing potential as in situ diagnostic tool for further implementation in clinical practice at patient personal levels.

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Section: Strain/pressure Sensorsmentioning

confidence: 99%

E-Skin: The Dawn of a New Era of On-Body Monitoring Systems

et al. 2021

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“…84 Examples of CNMs produced by upcycling include; fullerenes, carbon fibers, carbon nanotubes (CNTs), and graphene. 85,86 Other notable carbonbased products include; light hydrocarbons, activated carbons, and carbon dots. Typically, CNMs are synthesized through various techniques such as flame (combustion) synthesis, 84 arc discharge, 87 chemical vapor deposition, 88 and laser ablation, 89 for applications in a wide variety of products and processes.…”

Section: Carbon Nanomaterialsmentioning

confidence: 99%

Emerging trends in sustainable treatment and valorisation technologies for plastic wastes in Nigeria: A concise review

Nyakuma

Ivase²

2021

Env Prog and Sustain Energy

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The article presents an overview of the status, challenges, and prospects of current and emerging trends for the sustainable treatment and valorisation technologies of plastic wastes. The proliferation is ascribed to the growing population, living standards, and use of low cost, unbiodegradable, and chemically resistant plastic wastes in Nigeria. This scenario is exacerbated by the lack of comprehensive strategies for the collection, transport, segregation, and management of plastic wastes. Currently, plastic wastes treatment is accomplished by open-air burning, dumping, and landfilling. More advanced technologies, such as thermal (incineration, gasification), chemical (catalytic cracking and selective dissolution), and biological (microbial degradation) methods, are also utilized for treatment and valorisation. However, these high-cost, obsolete, and inefficient technologies result in GHG emissions, toxic fumes, toxins and leachates. Hence, novel technologies for the reuse, recycling, reduction, and valorisation of plastic wastes must emphasize energy, materials, and resource recovery. The article proposes the upcycling of plastic wastes into carbon nanomaterials (carbon microspheres, carbon nanofibers (CNFs), graphene flakes, carbon nanotubes), polymeric composite materials (wood-polyethylene composites, wood-fiber-reinforced plastics), biocrude/bio-oil, fuels, chemicals, and char through solvent/solvothermal treatment and plasma conversion. Solvent/solvothermal treatment can effectively treat and upcycle plastic wastes along with the removal of toxic, recalcitrant and bio-accumulative pollutants such as brominated flame retardants and organophosphorus flame retardants. However, the study identified numerous challenges that currently hamper plastic wastes disposal, management, and valorisation. Hence, sustainable and socially friendly approaches for plastic waste management and valorisation are required to address their short-and long-term impacts on human health, safety and the environment in Nigeria.

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“…These devices can function on different sensing principles, with mechanisms based on capacitance [3][4][5], resistance [6,7], piezoelectrics/triboelectrics [8,9], and transistors [10,11], and with example applications in the areas of biomechanical engineering [12,13], wearable sensors [14,15], and structural health monitoring [16,17]. Flexible sensors can be fabricated using conductive polymers [18,19] and silicone [20,21], sometimes doping the matrix with nanoparticles [22][23][24][25], to improve on electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Soft Elastomeric Capacitor for Angular Rotation Sensing in Steel Components

Liu

Laflamme

et al. 2021

Sensors

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The authors have previously proposed corrugated soft elastomeric capacitors (cSEC) to create ultra compliant scalable strain gauges. The cSEC technology has been successfully demonstrated in engineering and biomechanical applications for in-plane strain measurements. This study extends work on the cSEC to evaluate its performance at measuring angular rotation when installed folded at the junction of two plates. The objective is to characterize the sensor’s electromechanical behavior anticipating applications to the monitoring of welded connections in steel components. To do so, an electromechanical model that maps the cSEC signal to bending strain induced by angular rotation is derived and adjusted using a validated finite element model. Given the difficulty in mapping strain measurements to rotation, an algorithm termed angular rotation index (ARI) is formulated to link measurements to angular rotation directly. Experimental work is conducted on a hollow structural section (HSS) steel specimen equipped with cSECs subjected to compression to generate angular rotations at the corners within the cross-section. Results confirm that the cSEC is capable of tracking angular rotation-induced bending strain linearly, however with accuracy levels significantly lower than found over flat configurations. Nevertheless, measurements were mapped to angular rotations using the ARI, and it was found that the ARI mapped linearly to the angle of rotation, with an accuracy of 0.416∘.

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Carbon nanomaterials based films for strain sensing application—A review

Cited by 70 publications

References 128 publications

E-Skin: The Dawn of a New Era of On-Body Monitoring Systems

E-Skin: The Dawn of a New Era of On-Body Monitoring Systems

Emerging trends in sustainable treatment and valorisation technologies for plastic wastes in Nigeria: A concise review

Soft Elastomeric Capacitor for Angular Rotation Sensing in Steel Components

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