Thermally stable and high impact toughness chopped PI fiber-reinforced PEEK composites

Yao, Jianan; Yao, Weizhou; Gu, Yangyang; Zhang, Jindong; Yu, Youhai; Chen, Chunhai; Liu, Gang; Li, Hui

doi:10.1177/0954008319895307

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…Without any post-treatment, this value reached 80% of the tensile strength of injection-molding parts. 34 Compared to those of 3D-printed PEEK with heat treatments, 35 the tensile strength of the SCF/PEEK composites increased by 18%.…”

Section: Resultsmentioning

confidence: 99%

Enhancing the mechanical properties of SCF/PEEK composites in FDM via process-parameter optimization

Xing

et al. 2021

High Performance Polymers

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Short-carbon-fiber (SCF)–reinforced poly-ether-ether-ketone (PEEK) is a promising polymer composite material with good biocompatibility, a high strength-to-weight ratio, and low friction properties. In artificial-bone fabrication and other applications with more flexible fabrication demands, fused-deposition modeling (FDM) technology enables the rapid and low-cost fabrication of SCF/PEEK parts with sophisticated structures. Owing to the high viscosity of melting PEEK composites, great challenges, associated with the poor internal interface, need to be overcome before enhanced mechanical properties can be obtained. In this study, key processing parameters and various SCF amounts were studied to investigate their effects on the mechanical properties of PEEK composites. It was revealed that the existence of voids and gaps between the SCF and PEEK led to a decrease in the strength of the composite systems. The FDM processing parameters were tuned to eliminate these defects in the PEEK composites. The tensile strength of the 2% SCF/PEEK sample reached 96.4 MPa, which is comparable to that of PEEK parts prepared by injection molding. Meanwhile, its elastic modulus reached 2.6 GPa, which is 169% higher than that of the bare PEEK sample.

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Section: Resultsmentioning

confidence: 99%

Enhancing the mechanical properties of SCF/PEEK composites in FDM via process-parameter optimization

Xing

et al. 2021

High Performance Polymers

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“…Benefitting from their outstanding advantages, such as high specific strength, fracture toughness and impact resistance, higher repair potential, enhanced possibilities for recycling, costeffective manufacturing process as well as the possibility of automated joining by welding, carbon fiber reinforced thermoplastic composites (CFRTP) are considered as a potential alternative to conventional metal materials and thermoset composites. [1][2][3] Proper joining techniques with high efficiency and reliability could significantly facilitate the application of CFRTP structures. Compared with mechanical fastening and adhesive bonding, welding technology is considered to be a more appropriate and faster assembly route for CFRTP components, which is able to overcome some typical limitations of applying traditional joining methods including weight increase, stress concentration, long production cycle and so on.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat input on temperature characteristics and fusion behavior at bonding interface of CFRTP induction welded joint with carbon fiber susceptor

et al. 2022

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Induction welding is a suitable and promising technique for the assembly of thermoplastic composite structural components. In this work, the simulation and experimental research of induction welding devoted to the quality and efficient bonding of carbon fiber reinforced polyetheretherketone (CF/PEEK) laminates utilizing carbon fiber susceptors is presented. The carbon fiber susceptors that consist of carbon fabric and resin film same as base materials are prepared as heating elements to concentrate the heat generation on the welding interface. A transient three-dimensional finite element model is developed to analyze the heating characteristics and temperature distribution during the welding process. Induction welding experiments are carried out to investigate the effect of heat input on fusion behavior at the bonding interface, focusing on macro appearances, interfacial fusion morphologies and welding defects. The results show that heat distribution at the welding interface is uneven, presenting that the temperature at the edge is higher than at the center. An increase in heat input facilitates the fusion of the joints, which is demonstrated by a smaller relative width of the fusion zone and expander effective bonding area. However, macro and micro welding defects start to appear in joints due to the massive melting, ablation and thermal decomposition of resin, which are caused by excessive heat input. The micro defects dominated by pores are divided into four types according to their positions, sizes, morphologies and causes of formation.

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“…[1][2][3] As a member of thermoplastic composites, CFreinforced polyaryletherketone (CF/PAEK) composites have many other excellent properties such as durability against creep deformation, heating, flame, and chemicals. [4][5][6] When it comes to practical application, weak interface between dispersed fiber phase and continuous resin phase in CF/PAEK reduces the mechanical performance of the composites. 7 The interface in CF/PAEK is significant in transferring external stress from matrix to reinforcing fiber.…”

Section: Introductionmentioning

confidence: 99%

Effect of electrochemical oxidation degree of carbon fiber on the interfacial properties of carbon fiber–reinforced polyaryletherketone composites

Gao

Yang

Liu

et al. 2022

Journal of Reinforced Plastics and Composites

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Electrochemical oxidation of carbon fiber (CF) is used to enhance the interfacial adhesion of CF-reinforced polyaryletherketone (CF/PAEK) composites. The effect of current intensity parameter on surface structure of CF and interfacial properties of the corresponding thermoplastic composites are deeply investigated. The results show that the current intensity in the range of 80 A–300 A does not lead to a decrease in the mechanical property of CFs. When the current intensity is 200 A, CF/PAEK composites have the highest interfacial performance, which is mainly due to the improvement of CF surface roughness, wettability, and oxygen content. In addition, the degree of graphitization of CF surface is also a crucial factor affecting the interfacial properties of CF/PAEK. The higher the content of carboxyl groups, the more disordered the structures exist on the CF surface, which are not conducive to the strong adhesion of CF to PAEK resin. Therefore, balancing the wettability and graphitization degree of the CF surface is the key to enhancing the CF/PAEK interfacial properties by electrochemical treatment techniques.

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Thermally stable and high impact toughness chopped PI fiber-reinforced PEEK composites

Cited by 3 publications

References 25 publications

Enhancing the mechanical properties of SCF/PEEK composites in FDM via process-parameter optimization

Enhancing the mechanical properties of SCF/PEEK composites in FDM via process-parameter optimization

Effect of heat input on temperature characteristics and fusion behavior at bonding interface of CFRTP induction welded joint with carbon fiber susceptor

Effect of electrochemical oxidation degree of carbon fiber on the interfacial properties of carbon fiber–reinforced polyaryletherketone composites

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