High Thermal and Electrical Conductivity of Template Fabricated P3HT/MWCNT Composite Nanofibers

Smith, Matthew; Singh, Virendra; Kalaitzidou, Kyriaki; Cola, Baratunde A.

doi:10.1021/acsami.6b01845

Cited by 41 publications

(38 citation statements)

References 40 publications

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“…Remarkably, WPCs incorporating 12 wt % CNTs have a minimum volume resistivity of 6 × 10 5 Ω·m. Electrical conductivities of neat polymer composite-incorporating CNTs have shown higher values than those measured in this work, mainly because the presence of wood fibers obstructs the construction of conductive networks [16]. Compared to CNTs, the addition of 3% CB particles did not significantly affect the electrical resistivity of WPC.…”

Section: Resultsmentioning

confidence: 65%

Effect of the Addition of Carbon Nanomaterials on Electrical and Mechanical Properties of Wood Plastic Composites

Zhang

Hao

et al. 2017

Polymers

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Wood Plastic Composites (WPCs) are a new generation of green composites that could optimize the use of harvested trees and increase the entire value chain. In this study, the electrical and mechanical properties of WPCs containing carbon blacks (CB), flake graphite (FG) and carbon nanotubes (CNTs) have been investigated. The electrical property of WPCs is improved significantly owing to the introduction of these carbon nanomaterial fillers. The volume and surface resistivity values of the investigated composites all obviously decreased with the increase in filler content, especially CNTs, which displayed the most satisfactory results. Based on a series of laboratory experiments carried out to investigate the mechanical performance, it can be concluded that the addition of the carbon nanomaterial fillers decreases the mechanical properties of WPCs slightly with the increase in filler content because of the weak interfacial interactions between the fillers and polymer matrix.

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Section: Resultsmentioning

confidence: 65%

Effect of the Addition of Carbon Nanomaterials on Electrical and Mechanical Properties of Wood Plastic Composites

Zhang

Hao

et al. 2017

Polymers

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“…20 Further information regarding the PA measurement technique, model fitting parameters, and sample preparation can be found in the supplementary material and our previous publications. [21][22][23] As illustrated in Figure 1, the thermal conductivity does not significantly change as a function of laser irradiation, and a peak value of approximately 0.7 W/m-K is observed for foams fabricated at 4% duty cycle. Regardless, the LIG foam thermal conductivity is significantly larger than the PI thermal conductivity of 0.15 W/m-K reported by DuPont.…”

mentioning

confidence: 91%

Thermal conductivity enhancement of laser induced graphene foam upon P3HT infiltration

Smith

Luong

Bougher

et al. 2016

Applied Physics Letters

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Significant research has been dedicated to the exploration of high thermal conductivity polymer composite materials with conductive filler particles for use in heat transfer applications. However, poor particle dispersibility and interfacial phonon scattering have limited the effective composite thermal conductivity. Three-dimensional foams with high ligament thermal conductivity offer a potential solution to the two aforementioned problems but are traditionally fabricated through expensive and/or complex manufacturing methods. Here, laser induced graphene foams, fabricated through a simple and cost effective laser ablation method, are infiltrated with poly(3-hexylthiophene) in a step-wise fashion to demonstrate the impact of polymer on the thermal conductivity of the composite system. Surprisingly, the addition of polymer results in a drastic (250%) improvement in material thermal conductivity, enhancing the graphene foam's thermal conductivity from 0.68 W/m-K to 1.72 W/m-K for the fully infiltrated composite material. Graphene foam density measurements and theoretical models are utilized to estimate the effective ribbon thermal conductivity as a function of polymer filling. Here, it is proposed that the polymer solution acts as a binding material, which draws graphene ligaments together through elastocapillary coalescence and bonds these ligaments upon drying, resulting in greatly reduced contact resistance within the foam and an effective thermal conductivity improvement greater than what would be expected from the addition of polymer alone. Published by AIP Publishing. [http://dx

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“…Conventional polymer composites containing carbon-based fillers have shown the maximum /k value of $10 3 (S/m)/(W/mÁK), presented as gray symbols in Figure 1. [1][2][3][4] By replacing them with metallic fillers, the /k could be enhanced while composite density was also increased. The experimental data can be divided into two groups.…”

Section: Introductionmentioning

confidence: 99%

Double-segregated multiwalled carbon nanotube/silicone composites with large electrical to thermal conductivity ratios via in-situ silicone emulsion polymerization

Kim

Lee

Sohn

2020

Journal of Composite Materials

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Polymer composites with a high electrical conductivity ( σ) to thermal conductivity ( k) ratio have been intensively investigated in recent years. While highly conductive materials, such as metallic fillers or conducting polymers, were used to enhance σ, microstructural engineering was used to decrease k by forming porous structures, such as aerogels or 3D networks. These structures, however, were mechanically vulnerable and could only have limited applications. In this study, multiwalled carbon nanotube /silicone composites with a high σ/k ratio were developed by forming a double-segregated multiwalled carbon nanotube network in the porous body of the composites. The unique microstructure of the composites was created by a novel fabrication process: layer-by-layer deposition with in-situ polymerization of silicone emulsion particles dispersed in a water solvent. This novel process yielded very thick films, >200 µm, with high σ/k values, ∼2 × 104 (S/m)/(W/m·K). These high σ/k composites can be used for various applications, such as resistive heating elements, thermoelectric materials, and wearable thermotherapy.

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High Thermal and Electrical Conductivity of Template Fabricated P3HT/MWCNT Composite Nanofibers

Cited by 41 publications

References 40 publications

Effect of the Addition of Carbon Nanomaterials on Electrical and Mechanical Properties of Wood Plastic Composites

Effect of the Addition of Carbon Nanomaterials on Electrical and Mechanical Properties of Wood Plastic Composites

Thermal conductivity enhancement of laser induced graphene foam upon P3HT infiltration

Double-segregated multiwalled carbon nanotube/silicone composites with large electrical to thermal conductivity ratios via in-situ silicone emulsion polymerization

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