Elastomer based nanocomposites with reduced graphene oxide nanofillers allow for enhanced tensile and electrical properties

Mazhar, Sumaira; Lawson, Bret P.; Stein, Barry D.; Pink, Maren; Carini, John P.; Polezhaev, Alexander V.; Vlasov, Evgeny; Zulfiqar, Sonia; Sarwar, Muhammad Ilyas; Bronstein, Lyudmila M.

doi:10.1007/s10965-020-2039-3

Cited by 8 publications

(4 citation statements)

References 62 publications

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“…Compared with pure SIS, the tensile strength of the composites increased at a low content of graphene: the tensile strength of the 0.5 wt% graphene/SIS composites increases by 26.4% from 1.4 to 1.77 MPa. Then, the tensile strength consistently decreases when the graphene content exceeds 0.5 wt%, but it remains higher than that of pure SIS [ 26 ]. This may be ascribed to the different dispersed state and interfacial interaction of graphene in SIS matrix.…”

Section: Resultsmentioning

confidence: 99%

Effect of π–π Stacking Interfacial Interaction on the Properties of Graphene/Poly(styrene-b-isoprene-b-styrene) Composites

et al. 2021

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Interfacial interaction is one of the most important factors in the construction of high-performance graphene-based elastomer composites. In this paper, graphene/poly (styrene-b-isoprene-b-styrene) (SIS) composites were prepared with solution mixing followed by an evaporation-induced self-assembly process. Various techniques such as scanning electron microscopy, UV-vis absorption spectra, tensile testing, Shore A hardness, surface resistance, thermal conductivity, and thermogravimetric analysis were conducted to characterize the microstructure and properties of the obtained composites. The results showed that the π–π stacking interfacial interaction between phenyl groups of SIS and graphene play an important role in the properties’ improvement, and the effect of interfacial interaction on the properties was revealed.

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Section: Resultsmentioning

confidence: 99%

Effect of π–π Stacking Interfacial Interaction on the Properties of Graphene/Poly(styrene-b-isoprene-b-styrene) Composites

et al. 2021

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“…Compared to 10 various types of synthetic composite polymers in previous studies, this particular SPI–HBT0.5–GL0.5 film exhibited comparable (even higher) conductivity, which reached 0.912 S/m under a low conductive filler loading (0.5 wt %) and high moisture content (48.2%) (Figure b and Table S5). ,− The conductivity of the poly ( l -lactic acid) (PLLA) polymer (sample 5 in Figure b and Table S6) was as high as 0.96 S/m at a 10% loading of supramolecular polymer-functionalized graphene (SPFG); however, the conductivity decreased to 5.62 × 10 –5 S/m when the loading was 1% (sample 4 in Figure b and Table S6), which was far inferior to the SPI–HBT0.5–GL0.5 film. The conductivity of the SPI–HBT0.5–GL0.5 film was also much higher than that of several biobased conductive composites (such as silk, electrical protein NWs, cellulose, starch, bio-oil, and so on.)…”

Section: Results and Discussionmentioning

confidence: 99%

“Green” Flexible Electronics: Biodegradable and Mechanically Strong Soy Protein-Based Nanocomposite Films for Human Motion Monitoring

Wei

Jiang

et al. 2021

ACS Appl. Mater. Interfaces

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Soy protein isolate (SPI) is envisioned as a promising alternative to fabricate “green” flexible electronics, showing great potential in the field of flexible wearable electronics. However, it is challenging to simultaneously achieve conductive film-based human motion-monitoring strain sensors with reliable fatigue resistance, robust mechanical property, environmental degradability, and sensing capability of human motions. Herein, we prepared a series of SPI-based nanocomposite films by embedding a surface-hydroxylated high-dielectric constant inorganic filler, BaTiO3, (HBT) as interspersed nanoparticles into a biodegradable SPI substrate. In particular, the fabricated film comprising 0.5 wt % HBT and glycerin (GL), namely, SPI–HBT0.5–GL0.5, presents multifunctional properties, including a combination of excellent toughness, tensile strength, conductivity, translucence, recyclability, and excellent thermal stability. Meanwhile, this multifunctional film could be simply degraded in phosphate buffered saline solution and does not cause any pollution to the environment. Attractively, wearable sensors prepared with this particular material (SPI–HBT0.5–GL0.5) displayed excellent biocompatibility, prevented the occurrence of an immune response, and could accurately monitor various types of human joint motions and successfully remain operable after 10,000 cycles. These properties make the developed SPI-based film a great candidate in formulating biobased and multifunctional wearable electronics.

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“…One potential approach is mixing a flexible prepolymer with conductive fillers. However, mixing with additives can deteriorate the flexibility of the sensor, especially in cases where the percolation threshold is high [27,28]. Hence, localizing the conductive component on the surface (e.g.…”

Section: Introductionmentioning

confidence: 99%

3D printed flexible wearable sensors based on triply periodic minimal surface structures for biomonitoring applications

Imanian

Kardan-Halvaei

Nasrollahi

et al. 2022

Smart Mater. Struct.

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Soft piezoresistive wearable conductors have led to a paradigm shift in the monitoring of human bodily motions. Cellular additively manufactured conductors are promising piezoresistive components as they offer mechanical tunability and provide controllable percolation pathways. In the present study, we engineer high surface-area cellular structures with the triply periodic minimal surface (TPMS)-based architectures to tailor their piezoresistive response for use in wearable devices. A simple and economical fabrication process is proposed, wherein a fused deposition modeling (FDM) 3D printing technique is utilized to fabricate flexible thermoplastic polyurethane (TPU) cellular structures. Interconnectivity of TPMS designs enables the coating of a continuous graphene layer over the TPU internal surfaces via a facile dip-coating process. The effects of pore shape on piezoresistivity are studied in four different TPMS structures (i.e., Primitive, Diamond, Gyroid, and I-WP). Mechanical properties of sensors are evaluated through experimental procedures and computation methods using finite element analysis of the Mooney-Rivlin hyperelastic model. The piezoresistive performance of sensors exhibits durability under cyclic compression loading. Finally, we conclude that the Primitive structure offers suitable piezoresistive characteristics for sensing of walking, whereas the Diamond structure presents favorable results for respiration monitoring.

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Elastomer based nanocomposites with reduced graphene oxide nanofillers allow for enhanced tensile and electrical properties

Cited by 8 publications

References 62 publications

Effect of π–π Stacking Interfacial Interaction on the Properties of Graphene/Poly(styrene-b-isoprene-b-styrene) Composites

Effect of π–π Stacking Interfacial Interaction on the Properties of Graphene/Poly(styrene-b-isoprene-b-styrene) Composites

“Green” Flexible Electronics: Biodegradable and Mechanically Strong Soy Protein-Based Nanocomposite Films for Human Motion Monitoring

3D printed flexible wearable sensors based on triply periodic minimal surface structures for biomonitoring applications

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