Improving thermal durability and mechanical properties of poly(ether ether ketone) with single-walled carbon nanotubes

Ata, Seisuke; Hayashi, Yoshihiro; Thi, Thanh Binh Nguyen; Tomonoh, Shigeki; Kawauchi, Susumu; Yamada, Takeo; Hata, Kenji

doi:10.1016/j.polymer.2019.05.028

Cited by 25 publications

(8 citation statements)

References 22 publications

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“…Of all the fillers under consideration, CNTs have attracted significant attention due to their low density, high tensile strength and elastic modulus. For instance, Ata et al [ 9 ] investigated the mechanical properties of CNT-reinforced PEEK. At 5.0 wt% CNT loading, the tensile strength of the composite increased to 112.0 MPa, a remarkable 24.0% increase from the neat PEEK (~90 MPa).…”

Section: Introductionmentioning

confidence: 99%

Non-Isothermal Crystallization Kinetics of Polyether-Ether-Ketone Nanocomposites and Analysis of the Mechanical and Electrical Conductivity Performance

et al. 2022

Polymers

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High-performance polyether-ether-ketone (PEEK) is highly desirable for a plethora of engineering applications. The incorporation of conductive carbon nanotubes (CNTs) into PEEK can impart electrical conductivity to the otherwise non-conductive matrix, which can further expand the application realm for PEEK composites. However, a number of physical properties, which are central to the functionalities of the composite, are affected by the complex interplay of the crystallinity and presence of the nanofillers, such as CNTs. It is therefore of paramount importance to conduct an in-depth investigation to identify the process that optimizes the mechanical and electrical performance. In this work, PEEK/CNTs composites with different carbon nanotubes (CNTs) content ranging from 0.5 to 10.0 wt% are prepared by a parallel twin-screw extruder. The effects of CNTs content and annealing treatment on the crystallization behavior, mechanical properties and electrical conductivity of the PEEK/CNTs composites are investigated in detail. A non-isothermal crystallization kinetics test reveals a substantial loss in the composites’ crystallinity with the increased CNTs content. On the other hand, mechanical tests show that with 5.0 wt% CNTs content, the tensile strength reaches a maximum at 118.2 MPa, which amounts to a rise of 30.3% compared with the neat PEEK sample after annealing treatment. However, additional annealing treatment decreases the electrical conductivity as well as EMI shielding performance. Such a decrease is mainly attributed to the relatively small crystal size of PEEK, which excludes the conductive fillers to the boundaries and disrupts the otherwise conductive networks.

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Section: Introductionmentioning

confidence: 99%

Non-Isothermal Crystallization Kinetics of Polyether-Ether-Ketone Nanocomposites and Analysis of the Mechanical and Electrical Conductivity Performance

et al. 2022

Polymers

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“…Several polymer composites filled with CNTs, when investigated in recent research, exhibited improved thermal and electrical conductivity. The mechanism of the improvement in properties due to CNTs has been studied [ 16 , 17 , 18 ]. Unlike other fillers, such as carbon black and graphite, even with a relatively low loading of CNTs into the SR matrix, the mechanical, thermal, or electrical properties of the composites may be significantly improved, making CNTs a promising candidate for a filler.…”

Section: Introductionmentioning

confidence: 99%

Effect of Strain on Heating Characteristics of Silicone/CNT Composites

et al. 2021

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In this work, silicone/carbon nanotube (CNT) composites were produced using a spread coating process, followed by morphological investigations and determination of their electrical properties and heating behaviour through the application of electric potential. Composites containing varying amounts of CNT (1–7%) were investigated for their thermal behaviour with the use of an IR camera. Subsequently, thermal behaviour and electrical properties were measured when the samples were stretched (up to 20%). With the 7% CNT composites, which had a conductivity of 106 S/m, it was possible to achieve a temperature of 155 °C at a relatively low voltage of 23 V. For high CNT contents, when the potential was controlled in such a way as to maintain the temperature well below 100 °C, the temperature remained almost constant at all levels of strain investigated. At higher potentials yielding temperatures around 100 °C and above, stretching had a drastic effect on temperature. These results are critical for designing composites for dynamic applications requiring a material whose properties remain stable under strain.

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“…However, the electromagnetic shielding performance of the CPCs largely depends on the intrinsic conductivity, aspect ratio and the content of the fillers. In addition, PEEK is almost insoluble in conventional organic solvent [22]. As a result, PEEK-based composite can only be prepared by melting processing [17,23].…”

Section: Introductionmentioning

confidence: 99%

“…The high-performance electromagnetic shielding composites are obtained, but the processing difficulty still exist especially when the content of MWCNTs is relatively high. To avoid the above problems, another strategy is to design the structure of composite, such as sandwich structure [8,22,25–29]. The advantage of the approach is to avoid the problems of the dispersion and processing caused self-aggregation and high concentration of MWCNTs, and obtain the superior EMI SE at low filler loading [30].…”

Section: Introductionmentioning

confidence: 99%

“…It can be observed that the electromagnetic shielding and mechanical properties of sandwich-structure CNTs/polymer composites cannot be satisfied simultaneously. Because the mechanical performance of the sandwich-like composites is highly depended on the amount of CNTs-paper, and usually single-layer CNTs-paper can result in the best results [22,30,31]. However, in order to pursue high EMI SE, more CNTs-papers are needed as electromagnetic shielding layer, which will obviously weaken the mechanical properties of sandwich-structure CNTs/polymer composites due to the weak interface [32–34].…”

Section: Introductionmentioning

confidence: 99%

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Achieving structurally and functionally integrated electromagnetic shielding composites based on polyetheretherketone by sandwich structure

Mei

Liang

et al. 2021

Jnl of Sandwich Structures & Materials

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This study aims to prepare a structurally and functionally integrated polyetheretherketone/multi-wall carbon nanotubes (PEEK/MWCNTs) electromagnetic shielding composites by sandwich structure. The PEEK ultra-fine powder and MWCNTs mixed by mechanical blending were selected as the core-layer and PEEK-based film acted as the surface-layer. The results indicate that the electromagnetic shielding effectiveness (SE) and mechanical properties of the composites can be controlled by adjusting the ratio of PEEK which was chosen as the binder in the core-layer, the number of the core-layer and the composition of the surface-layer without sacrificing their thermal stability. Moreover, the specific electromagnetic shielding effectiveness (SSE), electrical conductivity, tensile strength and temperature of 5% weight loss (Td5%) of the optimized PEEK/MWCNTs composite reach 79.5 dB/mm, 1.8 S/cm, 93 MPa and 594°C, respectively. The performances of the above composite are obviously superior to those of the recently reported EMI composites. The improvements in the properties should be mainly attributed to the two factors: the dense conductive network formed by MWCNTs in the core-layer, and the good interface adhesion between MWCNTs-MWCNTs in the core-layer as well as between the core-layer and the surface-layer.

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Improving thermal durability and mechanical properties of poly(ether ether ketone) with single-walled carbon nanotubes

Cited by 25 publications

References 22 publications

Non-Isothermal Crystallization Kinetics of Polyether-Ether-Ketone Nanocomposites and Analysis of the Mechanical and Electrical Conductivity Performance

Non-Isothermal Crystallization Kinetics of Polyether-Ether-Ketone Nanocomposites and Analysis of the Mechanical and Electrical Conductivity Performance

Effect of Strain on Heating Characteristics of Silicone/CNT Composites

Achieving structurally and functionally integrated electromagnetic shielding composites based on polyetheretherketone by sandwich structure

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