Electrically conductive graphene-coated polyurethane foam and its epoxy composites

Xinzhao, Xu; Lin, Guoqing; Liu, Dongyan; Sui, Guoxin; Yang, Rui

doi:10.1016/j.coco.2017.11.003

Cited by 42 publications

(9 citation statements)

References 23 publications

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“…The use of graphene is considered to be one of the most effective methods to increase electrical and thermal conductivity of PUFs composites. Xu Xinzhao et al reported that the high electrical conductivity is due to the 3D networks formed by graphene on the inner surface of PUFs [ 272 ]. Similar to graphene, graphene oxide (GO) is known to be used in EMI applications [ 273 ].…”

Section: Polyurethane Foams Applications and Enhancement Of Propermentioning

confidence: 99%

Polyurethane Foams: Past, Present, and Future

2018

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Polymeric foams can be found virtually everywhere due to their advantageous properties compared with counterparts materials. Possibly the most important class of polymeric foams are polyurethane foams (PUFs), as their low density and thermal conductivity combined with their interesting mechanical properties make them excellent thermal and sound insulators, as well as structural and comfort materials. Despite the broad range of applications, the production of PUFs is still highly petroleum-dependent, so this industry must adapt to ever more strict regulations and rigorous consumers. In that sense, the well-established raw materials and process technologies can face a turning point in the near future, due to the need of using renewable raw materials and new process technologies, such as three-dimensional (3D) printing. In this work, the fundamental aspects of the production of PUFs are reviewed, the new challenges that the PUFs industry are expected to confront regarding process methodologies in the near future are outlined, and some alternatives are also presented. Then, the strategies for the improvement of PUFs sustainability, including recycling, and the enhancement of their properties are discussed.

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Section: Polyurethane Foams Applications and Enhancement Of Propermentioning

confidence: 99%

Polyurethane Foams: Past, Present, and Future

2018

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“…The resulting porous structure allows for various effective surface treatments, which increases drastically the spectrum of properties which can be achieved by using foam-based coatings, i.e. superhydrophobicity [29], [30], antibacterial [31], electrical [32] or fire-safe [33] properties.…”

Section: Discussionmentioning

confidence: 99%

Well-controlled foam-based solid coatings

et al. 2019

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“…Epoxy resins are very conventional and important engineered thermosetting polymers because of their high tensile strength, Young's modulus, good thermal and electrical insulating properties, and wide applications such as adhesives, electronics (excellent 78 electrical insulators), marine and aerospace. The mechanical properties of epoxy could be improved by the introduction of strong fillers and nanofillers through formation of polymer composites and nanocomposites, which could further provide epoxy with unique 80, 81 82 properties including optical, anticorrosive, magnetic properties, [83][84][85] electrical and thermal conductivity. However, owing to the easy agglomeration and large surface energy at nanoscale level, in order to obtain high performance epoxy nanocomposites, the nanofiller dispersion quality and the interfacial interaction between nanofillers 86 and epoxy matrix are two key factors to be solved.…”

Section: Coupling Agentmentioning

confidence: 99%

New Functions of Polyaniline

Gu¹,

Zhang²,

Chong³

et al. 2018

ES Mater.Manuf.

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Conducting polymers, such as polyacetylene (PA), polyaniline (PANI), polypyrrole (PPy), polythiophenes (PTs), and poly(DNTD), have gained more attentions in the last few decades. Among various 3 conducting polymers, PANI with the advantages of easy synthesis, low cost of monomers, good chemical stability, simple protonation/deprotonation process, tunable electrical conductivity and high pseudocapacitance values has become most often studied conducting polymers over the past years with the applications in 4-6 the supercapacitors, electrochromic materials, hydrogen 7-9 10 photoproduction, gas sensors, and environmental remediation. 11 12 13-15 The nitrogen atom in PANI polymer backbone participates in the-π band formation and electrical conduction. PANI is composed of 16 View Article Online amine groups and imine groups repeating units and possesses three oxidation states, which termed as "leucoemeraldine base" (LEB), 17 "emeraldine base" (EB) and "pernigraniline base" (PB) forms, accordingly. Normally, LEB and PB forms are intrinsically 18 insulating, even after doping; only EB form is able to be electrically conductive upon doping/protonation process and can be changed to the emeraldine salt (ES) form. Since these three states of PANI exhibit different colors, in which the LEB form is colorless or light yellow, the EB form-blue, the ES form-green (a symbol of electrical conduction of PANI), and the PB form-violet or black, 19 This makes PANI to act as the electrochromic matters for the smart windows and displays. 10,19 Recently, even some comprehensive reviews are focused on the 20 preparation, processing and applications of PANI, negative 21 22 permittivity of PANI nanocomposites, PANI based biosensors, PANI membrane for separation and purification of gas, liquids, and 23 24 electrolyte solutions, PANI nanofibers, and giant magnetoresistance 16 property in PANI and its nanocomposites. In contrast, this work summarizes the recent discoveries about the new application fields of PANI nanostructures which are not involved in the previous report including environmental remediation, giant magnetoresistance (GMR) sensors, coupling agent for epoxy and nanofillers, metamaterials, and energy storage in details. 2 New Functions of Polyaniline 2.1 Environmental Remediation Owing to the rapid economic and industrial development including metal plating facilities, tanneries, mining operations, batteries, paper 25 industries, fertilizer industries, and pesticides, etc., heavy metal pollution is being a serious environmental problem faced by 26 humans. Cr(VI) is a commonly identified heavy metal contaminant 27 due to its high toxicity and mobility. The US Environmental Protection Agency (EPA) allows a maximum contaminant level Owing to the excellent electrical conductivity and unique chemical structures, conducting polymer polyaniline (PANI) has been widely utilized in many application fields. In this review, the state-of-art current research status on the recent developed new functions of PANI in the applications including env...

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Electrically conductive graphene-coated polyurethane foam and its epoxy composites

Cited by 42 publications

References 23 publications

Polyurethane Foams: Past, Present, and Future

Polyurethane Foams: Past, Present, and Future

Well-controlled foam-based solid coatings

New Functions of Polyaniline

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