Conductive, self-healing, and repeatable graphene/carbon nanotube/polyurethane flexible sensor based on Diels-Alder chemothermal drive

Tu, Hongjun; Zhou, Ming; Gu, Yue; Gu, Yinhua

doi:10.1016/j.compscitech.2022.109476

Cited by 27 publications

(11 citation statements)

References 33 publications

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“…Both have good dispersion and Young's modulus and strain at break of these materials are enhanced. 92–94…”

Section: Dynamic Covalent Bonds and Nanofillersmentioning

confidence: 99%

“…Both have good dispersion and Young's modulus and strain at break of these materials are enhanced. [92][93][94] Rong Sun et al synthesized a new self-healing composite composed of functionalized graphene nanosheets and PU. 95 They reduced water-amine-functionalized graphene oxide to obtain water-amine-functionalized graphene nanosheets, namely, hydroxylated graphene nanosheets (FGN).…”

Section: Da Bonds and Nanofillersmentioning

confidence: 99%

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Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Kang

Xue

et al. 2023

Nanoscale

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“…Both have good dispersion and Young's modulus and strain at break of these materials are enhanced. 92–94…”

Section: Dynamic Covalent Bonds and Nanofillersmentioning

confidence: 99%

Section: Da Bonds and Nanofillersmentioning

confidence: 99%

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Kang

Xue

et al. 2023

Nanoscale

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“…The Diels–Alder (DA) reaction is known as a classically reversible reaction and has been widely studied in intrinsic self-healing polymers. The DA reaction between 2-substituted furan and maleimide (Figure a) is widely used in self-healing epoxy resins, , polyurethanes, − and other polymers , because of its cost-effectiveness, high reactivity, and favorable reversibility. Furfurylamine − and furfuryl alcohol − are the most commonly used 2-substituted furans in these self-healing epoxy resins (SHE).…”

Section: Introductionmentioning

confidence: 99%

Highly Thermal Stable, Stiff, and Recyclable Self-Healing Epoxy Based on Diels–Alder Reaction

Wang,

Chen,

Xing

et al. 2023

ACS Appl. Polym. Mater.

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The low heat resistance of self-healing polymers based on the Diels−Alder (DA) reaction between 2-substituted furans with maleimide has significantly limited their practical applications. To address this limitation, 3-substituted furans instead of 2-substituted furans were used in the reaction with maleimide, which formed a thermally stable conjugated structure in the adduct. As a result, the retro-DA reaction temperature was increased from 120 to 240 °C. Based on such a reaction, a selfhealing epoxy resin (SHE) with exceptional heat resistance was successfully synthesized. In addition to its thermal stability, the SHE exhibited a flexural strength and modulus reaching 141.1 MPa and 4.29 GPa, respectively, which were comparable to those of engineering epoxy resins. Moreover, the SHE demonstrated a remarkable self-healing ability and recycling capacity. The healing efficiency of fracture toughness was found to be as high as 85.4%, and the recovery efficiency of flexural strength reached 89.2% after the sample was crushed into powders and recured.

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“…They are able to translate a variety of deformations into electrical signals, from small deformations such as pulses and heartbeats to significant deformations experienced by human joints during vigorous physical activity. The manufacturer of flexible strain sensors frequently uses the silicone elastomer (PDMS) and polyurethane (PU). − Their shortcomings include a lack of sensitivity and a restricted degree of stretchability. Additionally, these synthetic materials frequently have poor capacity to biodegrade and might produce toxic compounds, increasing environmental concerns.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Biomass-Based Flexible Sensors by Hydrogen-Bond-Enhanced Epoxidized Natural Rubber

Tang,

Yuan,

Zhang

et al. 2023

ACS Appl. Polym. Mater.

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Biomass-based elastomeric materials have been thoroughly researched recently in the area of flexible sensors. Due to its outstanding tensile characteristics, epoxy natural rubber is extremely appealing for applications requiring flexible sensing. However, the poor fracture strength and oxidation resistance ability greatly limit its application. This study found that the introduction of oxidized lignin can greatly improve this bad situation. The maximum elongation improves by 61.51% when the mass ratio of oxidized lignin to ENR is 1:4, and the fracture strength increases by 3.57 times. Furthermore, the material's mechanical performance deterioration was lowered by 38.8% after a month of oxidation at ambient temperature. With exceptional tensile qualities, it was a perfect elastic material for the production of flexible sensors with high sensitivity and large strain. The manufactured flexible sensor performed well, with a linear response of 0.9994 in resistance variation, a quick response (10 ms), durability for over 2000 cycles, and high repeatability for stretching up to 1000%. Such a sustainable biomass-based elastic material, without the need for complex chemical reaction processes and expensive chemical reagents, was anticipated to replace traditional synthetic materials such as silicone rubber and polyurethane in the field of flexible sensor.

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Conductive, self-healing, and repeatable graphene/carbon nanotube/polyurethane flexible sensor based on Diels-Alder chemothermal drive

Cited by 27 publications

References 33 publications

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Highly Thermal Stable, Stiff, and Recyclable Self-Healing Epoxy Based on Diels–Alder Reaction

Fabrication of Biomass-Based Flexible Sensors by Hydrogen-Bond-Enhanced Epoxidized Natural Rubber

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