Permeability of carbon fibre PEEK composites for cryogenic storage tanks of future space launchers

Flanagan, Michael; Grogan, David M.; Goggins, Jamie; Appel, S.; Doyle, Keith B.; Leen, Seán B.; Brádaigh, Conchúr Ó

doi:10.1016/j.compositesa.2017.06.013

Cited by 65 publications

(36 citation statements)

References 22 publications

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“…Carbon fiber‐reinforced high‐performance thermoplastic polymer composites (CFRTP) have been developed over the past few decades due to its low weight and high mechanical strength . However, the out‐of‐plane properties of CFRTP, such as interlaminar shear strength (ILSS), flexural properties, and mode‐II interlaminar fracture toughness, are not sufficient due to the poor fiber–resin interfacial adhesion, which limit its wide application in aerospace, automotive, marine and other structural materials fields .…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical and electrical properties of carbon fiber/poly(ether ether ketone) laminates via inserting carbon nanotubes interleaves

Wei

Dang

et al. 2019

J of Applied Polymer Sci

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The carbon fiber/(carbon nanotubes/polyetherimide)/poly ether ether ketone (CF/(CNTs/PEI)/PEEK) laminates are prepared by inserting carbon nanotubes/polyetherimide (CNTs/PEI) interleaves into interlaminar region. The mechanical properties and electrical conductivities of the developed laminates are evaluated. The results indicate that the interlaminar shear strength and flexural strength of CF/(CNTs/ PEI)/PEEK laminates are increased by 42.9% and 24.7%, after inserting CNTs2.91/PEI interleaves, respectively. The cross-sectional images of laminates after mechanical tests verify strong fiber-resin adhesion by scanning electron microscope observation. The pertinent mechanism responsible for the improvement of mechanical properties is mechanical interlocking effect of CNTs. After incorporating CNTs/PEI interleaves, the electrical conductivity of laminates is markedly improved due to the formation of conductive pathway. This work suggests that this method is compatible with the preparation process of thermoplastic composites.

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Section: Introductionmentioning

confidence: 99%

Enhanced mechanical and electrical properties of carbon fiber/poly(ether ether ketone) laminates via inserting carbon nanotubes interleaves

Wei

Dang

et al. 2019

J of Applied Polymer Sci

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“…X-ray CT scanning has been used by a number of authors for analysing polymer and composite materials, specifically in the area of void and microcrack mapping [22,32,[59][60][61][62][63][64]. The majority of analyses conducted for COPV applications have centred on epoxy composites with graphite [65,66] and carbon fibres [57,[67][68][69][70], with limited analyses of carbon fibre PEEK composites [59,71], and even less so for LATP CF/PEEK laminates [42,72].…”

Section: X-ray Ct Scanningmentioning

confidence: 99%

Rotational moulding of PEEK polymer liners with carbon fibre/PEEK over tape-placement for space cryogenic fuel tanks

et al. 2017

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PEEK polymers are investigated as replacement materials for metallic liners in composite overwrapped pressure vessels (COPVs) for fuel tank applications in space. A novel, integrally heated, rotational moulding tool has been developed to produce PEEK polymer liners, samples of which have then been overwrapped using CF/PEEK in a laser assisted tapeplacement (LATP) process to produce demonstrator samples of a polymer lined COPV.Helium permeability testing has shown that the designs are capable of resisting leakage to acceptable levels for fuel storage, while X-ray CT scanning and cryogenic cycling have shown that the current design is capable of resisting crack growth over multiple cycles. Nanoindentation testing has shown that the LATP process has created a region of reduced modulus in the PEEK polymer at the surface of the liner where the CF/PEEK has been tapelaid. This laser-affected zone of reduced polymer modulus in the composite interface region has enabled an enhanced resistance to crack growth formations from thermal residual stresses in comparison to hot plate moulded test samples.

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“…PEEK is an emerging thermoplastic with excellent thermal stability and mechanical properties . In recent decades, although PEEK composites have been developed and used in commercial applications such as in electronics , medical transplants , and aerospace industries , there are still interface adhesion and impregnation problems, which are even more severe than polyolefin matrices such as polypropylene (PP) and polyamide (PA) . Ideally, to solve the urgent problem fundamentally and thoroughly, it should be linked directly to the original design of the synthetic polymer and the innovative processing method of carbon fiber‐reinforced thermoplastic composites.…”

Section: Introductionmentioning

confidence: 99%

Higher mechanical performances of CF/PEEK composite laminates via reducing interlayer porosity based on the affinity of functional s‐PEEK

et al. 2019

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Extensive application of carbon fiber-reinforced thermoplastic composites has been severely limited by two essential drawbacks including poor interfacial adhesion and harmful void volume fraction between the fiber and the thermoplastic matrix. These drawbacks are due to the surface inertness and high viscosity of thermoplastic during the forming process, respectively. To address these challenges, we report a strategy in which sulfonated polyetheretherketone (s-PEEK) with strong affinity was successfully obtained as a compatibilizer to modify the interfacial micromechanical properties of carbon fiber (CF) reinforced polyetheretherketone (PEEK) composites. Using optimum mass amount of s-PEEK, the interlaminar shear strength (ILSS) and tensile strength of the improved CF/PEEK composite laminates were 78.6 and 795 MPa, which had been increased more than 45.6% and 11.2% as compared with the original CF/PEEK composite laminates, respectively. The reason was that internal voids and interfacial bonding between CF and PEEK matrix were obviously improved by s-PEEK. The affinity of s-PEEK offered new insights to overcome the poor interfacial adhesion for fabricating structural parts with thermoplastic composites. The functionalized CF/PEEK composites have been successfully applied to fabricate a car interior ornament, well meeting the requirements of lightweight and high strength of automobiles.

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Permeability of carbon fibre PEEK composites for cryogenic storage tanks of future space launchers

Cited by 65 publications

References 22 publications

Enhanced mechanical and electrical properties of carbon fiber/poly(ether ether ketone) laminates via inserting carbon nanotubes interleaves

Enhanced mechanical and electrical properties of carbon fiber/poly(ether ether ketone) laminates via inserting carbon nanotubes interleaves

Rotational moulding of PEEK polymer liners with carbon fibre/PEEK over tape-placement for space cryogenic fuel tanks

Higher mechanical performances of CF/PEEK composite laminates via reducing interlayer porosity based on the affinity of functional s‐PEEK

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