Improvement of the mechanical properties and thermal conductivity of poly(ether-ether-ketone) with the addition of graphene oxide-carbon nanotube hybrid fillers

Hwang, Yongseon; Kim, Myeongjin; Kim, Jooheon

doi:10.1016/j.compositesa.2013.08.010

Cited by 86 publications

(40 citation statements)

References 41 publications

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“…It can be seen that although 2.0 and 5.0GO-PEEK exhibited similar or even better flexural modulus compareing to other GO-PEEK composites, they are more prone to fracture at a much lower strain level (ɛf = 0.071 and 0.069, respectively). hybrid fillers enhanced PEEK reported previously [30], indicating the more superior stiffness of our composites [31,32]. According to Fig 3c, the strain at break of the composites varies significantly with different GO content.…”

Section: Fig 2asupporting

confidence: 71%

“…Table 1 summarized some of the recent studies dealing with material systems consist of PEEK and GO. [30] Filler dispersion / distribution and their interfacial interaction with the polymer matrix play a key role in the resulting composite mechanical properties [25,26]. As is shown in Table 1, many researchers have surface functionalized the fillers in order to enhance their dispersion and/or enable stronger filler/matrix interfacial bonding to facilitate load transfer.…”

Section: Introductionmentioning

confidence: 99%

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Super tough graphene oxide reinforced polyetheretherketone for potential hard tissue repair applications

Chen

Guo

et al. 2019

Composites Science and Technology

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Biocompatible polyetheretherketone (PEEK) is a favorable material for hard tissue repair due to its similar elastic modulus to that of the human bone. In this work, graphene oxide (GO) reinforced PEEK nanocomposites with different GO loading have been prepared by injection molding. Mechanical testing reveals that the toughness of the reinforced composite varies with the GO loading, with 0.5% GO giving the greatest elongation at break (86.32% greater than pristine PEEK). The underlying toughening mechanism has been attributed to the well-dispersed GO forming π-π* conjugations at the GO / PEEK interface. These conjugations also acted as the nucleation sites for oriented crystallized region in PEEK. As the GO content increases further (e.g > 0.5%), the fillers tend to agglomerate and would disturb the crystallites of PEEK and serve as stress concentration sites, resulting in decreased toughness. The biocompatibility of the composites has been evaluated in vitro, and the results showed that the addition of GO into PEEK favors the adhesion and spreading of bone marrow stromal stem cells, demonstrating the strong potential of our GO reinforced PEEK composites in applications such as hard tissue repair and replacement.

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Section: Fig 2asupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Super tough graphene oxide reinforced polyetheretherketone for potential hard tissue repair applications

Chen

Guo

et al. 2019

Composites Science and Technology

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“…For example, with only 4.0 wt% GNSs, the tensile strength increased by 45% from 40.5 MPa to 58.7 MPa, and Young's modulus increased by 188% from 0.26 GPa to 0.75 GPa. The enhanced mechanical properties should attributed to the strong interaction between GNSs and the matrix; furthermore, the molecular‐level dispersion of GNSs with high strength into the polymer matrix will also lead to an increase on mechanical properties of the nanocomposites …”

Section: Resultsmentioning

confidence: 99%

In-situ thermal reduction and effective reinforcement of graphene nanosheet/poly (ethylene glycol)/poly (lactic acid) nanocomposites

Huang

Yang

et al. 2014

Polym. Adv. Technol.

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This study aims to achieve a molecule-level dispersion of graphene nanosheets (GNSs) and a maximum interfacial interaction between GNSs and a polymer matrix. GNS-reinforced poly (ethylene glycol) (PEG)/poly (lactic acid) (PLA) nanocomposites are obtained by a facile and environment-friendly preparation method. Graphite oxide and GNSs are characterized by atomic force microscopy, Raman spectroscopy, and X-ray diffraction. Scanning electron microscopy shows that the state of dispersion of the GNS in the PEG/PLA matrix is distribution. The tensile strength and Young's modulus increases by 45% and 188%, respectively, with the addition of 4.0 wt% GNSs. The thermal stability of the GNS-based nanocomposites also improves. Differential scanning calorimetry indicates that GNSs have no remarkable effect on the crystallinity of the nanocomposites. The effective reinforcement of the nanocomposites is mainly attributed to the highly strong molecular-level dispersion of the GNSs in the polymer matrix.

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“…Similar decrease trend of thermal conductivity is also observed in Refs. [167][168][169][170], which is attributed to the increased interfacial thermal resistance caused by aggregation. The second rise of the thermal conductivity may result from the heat transport pathway formed among clusters which are formed by aggregation of fillers.…”

Section: Nanocomposites Without An Inter-filler Networkmentioning

confidence: 99%

Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

673

391

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Polymers are widely used in industry and in our daily life because of their diverse functionality, light weight, low cost and excellent chemical stability. However, on some applications such as heat exchangers and electronic packaging, the low thermal conductivity of polymers is one of the major technological barriers. Enhancing the thermal conductivity of polymers is important for these applications and has become a very active research topic over the past two decades. In this review article, we aim to: 1). systematically summarize the molecular level understanding on the thermal transport mechanisms in polymers in terms of polymer morphology, chain structure and inter-chain coupling; 2). highlight the rationales in the recent efforts in enhancing the thermal conductivity of nanostructured polymers and polymer nanocomposites. Finally, we outline the main advances, challenges and outlooks for highly thermal-conductive polymer and polymer nanocomposites. the inter-chain coupling. Fig. 1 Schematic diagrams of a polymer: (a) the morphology of a polymer consisting of crystalline and amorphous domains; (b) structure of a polymer chain.In addition to engineering the morphology of polymer chains, another common method to enhance the thermal conductivity of polymers is to blend polymers with highly thermal conductive fillers. The progress of nanotechnology over the last two decades not only provides more diverse high thermal conductivity fillers of different material types and topological shapes but also advances the understanding at the nanoscale. Fig. 2 shows a sketch of a polymer nanocomposite to illustrate the thermal transport mechanisms. In general, there are two types of polymer nanocomposites depending on whether nano-fillers form a network or not. When the filler concentration is low, no inter-filler networks could be formed, as shown in Fig. 2(a). The thermal conductivity is essentially determined by the filler-matrix coupling, i.e, interfacial thermal resistance, and the concentration and the geometric shapes of fillers. When the filler concentration is large enough, high conductivity fillers might form thermally conductive networks, as shown in Fig. 2(b). Although nanocomposites with filler network could possess a higher thermal conductivity than that without a network, their thermal conductivity could still be low due to the large inter-filler thermal contact resistance. Recently, three-dimensional fillers, such as carbon and graphene foams, have drawn a lot of attention. The fundamental thermal transport mechanisms and recent synthesis efforts in both types of nanocomposites are reviewed.This review article is organized as follows. In Section 2, we introduce the experimental progress on the enhancement of thermal conductivity by aligning polymer chains, and then review the methods to further tune the thermal conductivity by engineering chain structure and inter-chain coupling, as illustrated in Fig. 3(a). In Section 3, we discuss the thermal conductivity of polymer nanocomposites both with and without inter...

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Improvement of the mechanical properties and thermal conductivity of poly(ether-ether-ketone) with the addition of graphene oxide-carbon nanotube hybrid fillers

Cited by 86 publications

References 41 publications

Super tough graphene oxide reinforced polyetheretherketone for potential hard tissue repair applications

Super tough graphene oxide reinforced polyetheretherketone for potential hard tissue repair applications

In-situ thermal reduction and effective reinforcement of graphene nanosheet/poly (ethylene glycol)/poly (lactic acid) nanocomposites

Thermal conductivity of polymers and polymer nanocomposites

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