Stretchable graphene and carbon nanofiber capacitive touch sensors for robotic skin applications

With advances in electronics, the concept of flexible electronics has left traditional designs behind. Many concepts, such as sensors, transistors, soft robotics, data, and energy storage devices have begun to find more widespread and flexible areas of use. From this point of view, using environmentally friendly, abundant, and renewable natural materials that reduce carbon emissions in the production and disposal of these components is the first step toward the concept of sustainable flexible electronics. This review deals with the integration of sustainable natural materials obtained from plant, animal, and bacterial sources into sensors, displays, data storage, power generation, and soft robotic systems, with appropriate examples compiled from the last ten years. In addition, limitations in the use of sustainable materials as flexible electronic components and their potential for use in innovative electronic applications in the future are foreseen.

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“…The authors reported that the flexible coatings could offer 10 times more flexural strength in the demonstration of robotic movements. [ 285 ]…”

Section: Sustainable Materials In Flexible Electronicsmentioning

confidence: 99%

“…The authors reported that the flexible coatings could offer 10 times more flexural strength in the demonstration of robotic movements. [285] 4.5. DNA All living organisms, including us as humans, have a unique and scientifically still being investigated carrier of genetic information called deoxyribonucleic acid (DNA).…”

Section: Complex Natural Organic Mixturesmentioning

confidence: 99%

Sustainable Macromolecular Materials in Flexible Electronics

Kılıçarslan

Bozyel

Gökcen

et al. 2022

Macro Materials & Eng

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“…[6,8] Polymer nanocomposites and their associated materials have grabbed researchers and the scientific community's attention after they came into the limelight for many technological applications, including the automobile industry, aerospace, electronics, and robotics, to name a few. [9][10][11] Many investigations have been carried out to explore various fillers such as clay, [12] carbon (amorphous), [13] carbon black, [14] carbon fiber, [15] CNTs, [16,17] and graphene [18][19][20] as reinforcement for synthesizing polymer and hybrid polymer composites. However, carbon black is the most conventionally used filler to improve elastomers' modulus.…”

Section: Introductionmentioning

confidence: 99%

Epoxidized natural rubber/acid functionalized carbon nanotubes composites for enhanced thermo‐mechanical and oxygen barrier performance

Balendran

Yaragalla

2022

Polymer Engineering & Sci

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Herein, acid functionalized carbon nanotubes (FCNTs) reinforced epoxidized natural rubber (ENR 25) composites with 25% epoxidation are studied with particular reference to the effect of FCNTs on microstructural development along with their effect on thermo-mechanical and gas barrier properties. Excellent improvement in tensile strength, that is, 128% and 118%, was observed with the addition 1 and 2 wt% of FCNTs, respectively, without compromising the elongation at break. A 76% improvement in oxygen impermeability was found for 2 wt% of FCNTs. Chemical interactions among FCNTs and ENR 25 altered the composite morphology and led to good dispersion, both of which contribute to the excellent thermo-mechanical and gas barrier properties of the composites. The distribution of the filler inside ENR 25 has been characterized with scanning electron microscopy, which unveiled segregated FCNTs. The obtained experimental gas permeability values were correlated with the well-known Bharadwaj model. The fabricated functional composites could find applications in automobiles, packaging, and other demanding engineering sectors.

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“…Since the first discovery by Andre Geim and Konstantin Novoselov in 2004, graphene has been extensively studied for many applications including, but not limited to, sensing, composites, catalyst, adsorption, supporting materials, and electronic devices due to their novel chemical and physical properties [17][18][19][20][21][22][23]. Among these, the use of graphene as a nanofiller in composites is one of the most promising application fields, which extensively attracts scientists worldwide [24][25][26]. Graphene nanofillers could improve many polymers' thermal, electrical, and mechanical properties, including rubbers [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Dioctyl Phthalate-Modified Graphene Nanoplatelets: An Effective Additive for Enhanced Mechanical Properties of Natural Rubber

et al. 2022

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Graphene has been extensively considered an ideal additive to improve the mechanical properties of many composite materials, including rubbers, because of its novel strength, high surface area, and remarkable thermal and electron conductivity. However, the pristine graphene shows low dispersibility in the rubber matrix resulting in only slightly enhanced mechanical properties of the rubber composite. In this work, graphene nanoplatelets (GNPs) were modified with dioctyl phthalate (DOP) to improve the dispersibility of the graphene in the natural rubber (NR). The distribution of the DOP-modified GNPs in the NR matrix was investigated using scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The effect of the modified GNPs’ contents on the mechanical properties of the GNPs/NR composite was studied in detail. The results showed that the abrasion resistance of the graphene-reinforced rubber composite significantly improved by 10 times compared to that of the rubber without graphene (from 0.3 to 0.03 g/cycle without and with addition of the 0.3 phr modified GNPs). The addition of the modified GNPs also improved the shear and tensile strength of the rubber composite. The tensile strength and shear strength of the NR/GNPs composite with a GNPs loading of 0.3 phr were determined to be 23.63 MPa and 42.69 N/mm, respectively. Even the presence of the graphene reduced the other mechanical properties such as Shore hardness, elongation at break, and residual elongation; however, these reductions were negligible, which still makes the modified GNPs significant as an effective additive for the natural rubber in applications requiring high abrasion resistance.

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Stretchable graphene and carbon nanofiber capacitive touch sensors for robotic skin applications

Cited by 24 publications

References 25 publications

Sustainable Macromolecular Materials in Flexible Electronics

Sustainable Macromolecular Materials in Flexible Electronics

Epoxidized natural rubber/acid functionalized carbon nanotubes composites for enhanced thermo‐mechanical and oxygen barrier performance

Dioctyl Phthalate-Modified Graphene Nanoplatelets: An Effective Additive for Enhanced Mechanical Properties of Natural Rubber

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