Polyetheretherketone (PEEK) nanocomposites for extreme mechanical and tribological loads

Knör, N.; Gebhard, Andreas; Haupert, F.; Schlarb, Alois K.

doi:10.1007/s11029-009-9071-z

Cited by 24 publications

(18 citation statements)

References 10 publications

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“…These last results suggest that no formation of large agglomerates of HA (which could concentrate the stress and decrease the impact resistance) occurred. Sample NANO‐3 (the nanocomposite of PEEK and 10 wt % HA) injection‐molded at a high Q (conditions 3) had the best impact resistance of all of the samples; this was probably due to high orientation along the samples promoted by the high shear rates.…”

Section: Resultsmentioning

confidence: 83%

Mechanical properties and stem cell adhesion of injection‐molded poly(ether ether ketone) and hydroxyapatite nanocomposites

Rego

Neto

Paula

et al. 2014

J of Applied Polymer Sci

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A nanocomposite of poly(ether ether ketone) (PEEK) with 10 wt % hydroxyapatite (HA) was produced by extrusion and injection molding. Afterward, the samples were thermally treated. Thermal and short‐ and long‐term mechanical characterizations of the samples were made. The adhesion of human adipose stem cells (h‐ASCs) on the samples was also monitored. The ultimate tensile strength (UTS) and elastic modulus values of the nanocomposite were found to be much higher than those of trabecular bone. The impact strength of PEEK was not modified by HA; this suggested that there was no formation of large agglomerates of nanoparticles that could concentrate the stresses. With regard to fatigue life, both the thermally and nonthermally treated nanocomposites did not fail after 106 cycles when maximum stresses of 30 and 50% of the UTS were applied, but they failed when the maximum applied stress was 75% of the UTS and behaved as cortical bone. After 5 days of culturing, the h‐ASCs had a higher proliferation in the nanocomposite than in pure PEEK because of the presence of HA. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41748.

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Section: Resultsmentioning

confidence: 83%

Mechanical properties and stem cell adhesion of injection‐molded poly(ether ether ketone) and hydroxyapatite nanocomposites

Rego

Neto

Paula

et al. 2014

J of Applied Polymer Sci

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“…The bright holes observed on the thin sections indicate the debonding of the agglomerates during the sample preparation. In spite of the utilization of an optimized extrusion process according to Knör et al , there are still potentials to gain better dispersion state of CNTs within the polymer matrix. This formation of agglomerates during the compounding process can impede the effective reinforcing effect of carbon nanotubes.…”

Section: Resultsmentioning

confidence: 99%

Improved weld strength of vibration welded polyoxymethylene/multiwalled carbon nanotubes hybrid nanocomposites

Lin

Schlarb

2016

Polym Eng Sci

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In this study, carbon nanotubes reinforced polyoxymethylene with different filler loadings was joined by using linear vibration welding technique. The tensile properties of vibration welded polyoxymethylene nanocomposites with different carbon nanotube contents were studied as functions of filler loading and weld pressure. The results showed that the addition of carbon nanotubes into polyoxymethylene slightly improved the matrix tensile strength and pronounced decreased the ductility of pure polyoxymethylene. Interestingly, the weld strength of the nanocomposites was also higher than the polymer matrix strength even at high weld pressure of 2 MPa. Possible reasons for this high weld strength are discussed based on the morphological investigations. POLYM. ENG. SCI., 56:636-642,

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“…Organic–inorganic hybrid films represent a class of new advanced materials that combine the flexibility and processability of organic polymers with superior mechanical and thermal stability of inorganic phase. Much research was reported on the fabrication of PEEK nanocomposites by using low‐cost conventional techniques such as extrusion and compression molding . To produce composites exhibiting improved properties, different strategies were used to achieve a good dispersion of nanofiller within the polymer matrix, such as ultrasonication, ball milling, wrapping in compatibilizing agents, polymer functionalization, and covalent grafting.…”

Section: Introductionmentioning

confidence: 99%

Thermal, Electrical, and Gas Transport Properties of New Aromatic Poly(Ether Ether Ketone)/Silica Hybrid Films

Hamciuc¹,

Hamciuc²,

Rusu³

et al. 2017

Polymer Composites

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New hybrid films were prepared through a sol–gel process starting from a poly(ether ether ketone)‐containing pendant carboxyl groups (PEEK‐R) and various alkoxysilanes (tetraethoxysilane, methyltrietoxysilane, and phenyltriethoxysilane) as precursors of the inorganic network. PEEK‐R was synthesized from 4,4′‐difluorobenzophenone and a mixture of phenolphthalein and phenolphthalin. Owing to the presence of polar phthalide and carboxyl groups in the PEEK‐R structure, the hybrid films showed homogeneous morphologies. The films exhibited good thermal stability, having initial decomposition temperature over 440°C and a glass transition of 180–218°C. The contact angle values of film surfaces with water and ethylene glycol increased by the introduction of silica. The dielectric spectroscopy analysis at lower temperature evidenced two secondary relaxation processes, γ and β. At higher temperature, a conductivity relaxation was observed. The thermal activation energy of conductivity was in the range of 0.6–1.02 eV, confirming the electronic conduction via hopping. Gas permeation tests using small molecules (He, N2, O2, and CO2) indicated that hybrid films showed higher permeability than pure polymer film for all tested gases. The permeability increase was accompanied by a slight reduction in selectivity, but CO2/N2 selectivity remained significantly high making this type of hybrid materials promising candidate for gas separation membranes. POLYM. COMPOS., 39:E1544–E1553, 2018. © 2017 Society of Plastics Engineers

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Polyetheretherketone (PEEK) nanocomposites for extreme mechanical and tribological loads

Cited by 24 publications

References 10 publications

Mechanical properties and stem cell adhesion of injection‐molded poly(ether ether ketone) and hydroxyapatite nanocomposites

Mechanical properties and stem cell adhesion of injection‐molded poly(ether ether ketone) and hydroxyapatite nanocomposites

Improved weld strength of vibration welded polyoxymethylene/multiwalled carbon nanotubes hybrid nanocomposites

Thermal, Electrical, and Gas Transport Properties of New Aromatic Poly(Ether Ether Ketone)/Silica Hybrid Films

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