Enhancement of thermal conductivity in polyamide-6/graphene composites via a “bridge effect” of silicon carbide whiskers

Song, Na; Pan, Haidong; Hou, Xingshuang; Cui, Siqi; Shi, Liyi; Ding, Peng

doi:10.1039/c7ra09094c

Cited by 13 publications

(5 citation statements)

References 48 publications

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“…Figure 5 B shows a peak at 2θ = 25.6° for graphene and PU coating materials, with a d-spacing of 3.46 Å, corresponding to the presence of graphene in the composite material. This also implied that the graphene was coated on PU surfaces in a layered manner [ 44 ]. FTIR confirmed the successful coating of graphene on the surface of PU scaffolds by PDA.…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Mechanical Properties and Aging Resistance of 3D-Printed Polyurethane through Polydopamine and Graphene Coating

Tung,

Lin,

Chen

et al. 2023

Polymers

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Three-dimensional (3D) printing is a versatile manufacturing method widely used in various industries due to its design flexibility, rapid production, and mechanical strength. Polyurethane (PU) is a biopolymer frequently employed in 3D printing applications, but its susceptibility to UV degradation limits its durability. To address this issue, various additives, including graphene, have been explored to enhance PU properties. Graphene, a two-dimensional carbon material, possesses remarkable mechanical and electrical properties, but challenges arise in its dispersion within the polymer matrix. Surface modification techniques, like polydopamine (PDA) coating, have been introduced to improve graphene’s compatibility with polymers. This study presents a method of 3D printing PU scaffolds coated with PDA and graphene for enhanced UV stability. The scaffolds were characterized through X-ray diffraction, Fourier-transform infrared spectroscopy, mechanical testing, scanning electron microscopy, and UV durability tests. Results showed successful PDA coating, graphene deposition, and improved mechanical properties. The PDA–graphene-modified scaffolds exhibited greater UV resistance over time, attributed to synergistic effects between PDA and graphene. These findings highlight the potential of combining PDA and graphene to enhance the stability and mechanical performance of 3D-printed PU scaffolds.

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Section: Resultsmentioning

confidence: 99%

Enhancing the Mechanical Properties and Aging Resistance of 3D-Printed Polyurethane through Polydopamine and Graphene Coating

Tung,

Lin,

Chen

et al. 2023

Polymers

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“…On the contrary, the through‐plane thermal conductivity ( k z ) is much lower (orders of magnitude) compared to k x . [ 31 ]…”

Section: Resultsmentioning

confidence: 99%

In‐situ graphene alignment in self‐sealing stretchable films for efficient thermal interface materials

Clausi

Bayer

2020

Nano Select

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Although graphene nanoplatelets (GnPs) and carbon nanotubes (CNTs) are known to have demonstrated significant potential as functional fillers to improve the electrical and thermal properties of polymers, aside from the state of dispersion, the level of improvement has been found to be strongly correlated with the in situ orientation. However, achieving in situ orientation within a polymer presents significant technological challenges. In this paper, we show a simple and repeatable thermoforming process to fabricate high thermal conductive GnP nanocomposite pads using a self‐sealing stretchable film (parafilm, PF). The pads could be sliced and reoriented into vertical stacks and fused into new pads due to self‐sealing nature of PF. Hybrids pads were also constructed with MWCNTs. Vertically aligned hybrids featured thermal conductivities close to 6 W mK‐1 that could be effectively modeled by Maxwell‐Garnett (MG‐EMA) theory. Vertical alignment also improved bulk (volume) electrical conductivity to 0.1 S cm‐1. Moreover, MWCNTs have exceedingly enhanced the ductility and elongation at break values of GnP nanocomposites that justified their incorporation into the nanocomposites. These hybrids can be easily adapted to various thermal management applications either in the form of freestanding thick pads (1‐3 mm) or thermal coatings due to the self‐sealing nature of the matrix.

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“…Furthermore, raster angle of 8 � printed PA12/GNPs parts showing the reinforcement efficiency. Song et al 88 prepared PA6/graphene (PG) composites by melting, stirring through an internal mixer. They demonstrated the bridge effect of silicon carbide whiskers (SiCw) on the enhancement of thermal conductivity in the experimental results.…”

Section: Melt Blendingmentioning

confidence: 99%

Review on recent progress in synthesis of graphene–polyamide nanocomposites

Madhad

Vasava

2019

Journal of Thermoplastic Composite Materials

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In polymer nanocomposites, graphene is possibly the most promising nanofiller. Graphene produces impressive properties for polymers at very low filler content, which makes it highly interesting in building high-performance materials compared to other classes of polymer nanocomposites. Graphene-modified polymer nanocomposites have attracted much attention in scientific literature because of the need of superior materials with desirable properties such as electrical, mechanical, thermal, flame retardant, and gas barrier. Frequent studies have been attempted to produce graphene–polyamide (G-PA) nanocomposites with novel and improved properties. Based on this review, one can identify the synthesis technique and preparation for G-PA nanocomposites, which can further be useful in numerous applications.

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Enhancement of thermal conductivity in polyamide-6/graphene composites via a “bridge effect” of silicon carbide whiskers

Cited by 13 publications

References 48 publications

Enhancing the Mechanical Properties and Aging Resistance of 3D-Printed Polyurethane through Polydopamine and Graphene Coating

Enhancing the Mechanical Properties and Aging Resistance of 3D-Printed Polyurethane through Polydopamine and Graphene Coating

In‐situ graphene alignment in self‐sealing stretchable films for efficient thermal interface materials

Review on recent progress in synthesis of graphene–polyamide nanocomposites

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