Investigation on polyetheretherketone composite for long term storage of nuclear waste

Ajeesh, G.; Bhowmik, Shantanu; Venugopal, Sivakumar; Varshney, Lalit; Kumar, Virendra; Abraham, Mathew

doi:10.1016/j.jnucmat.2015.11.002

Cited by 17 publications

(7 citation statements)

References 4 publications

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“…Because of these new uses, it becomes necessary to investigate PEEK behaviour towards electronic irradiations. Since its first commercialisation by Imperial Chemical Industries in 1978, numerous studies have focused on the behaviour of PEEK and its composites under different radiation sources like gamma rays [4,5], ultraviolet light [6] or under combined ageing [7,8]. In the specific case of electronic irradiations, Sasuga et al studied the mechanical behaviour evolution of irradiated samples [9,10].…”

Section: Introductionmentioning

confidence: 99%

Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications

Rival

Paulmier

Dantras

2019

Polymer Degradation and Stability

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Polymer materials used in satellite manufacturing are exposed to severe environmental conditions. Irradiation by high-energy electrons induces chemical modifications of macromolecules. Poly-EtherEtherKetone (PEEK) is used in space industry and therefore, its behaviour regarding electronic irradiations has to be studied. Thus, the aim of this work is to investigate the effect of experimental electronic irradiations on the physical and chemical structure of PEEK. In this way, PEEK films were irradiated under high vacuum by a mono-energetic electron beam. Doses deposited are representatives of 15 years in geostationary electronic environment. The study of irradiated samples revealed modifications of the chemical and physical structures. Irradiation predominantly induces cross-linking phenomena in the amorphous phase in front of chain scission phenomena. Irradiation also leads to a decrease in crystallite size and crystallinity ratio.

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Section: Introductionmentioning

confidence: 99%

Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications

Rival

Paulmier

Dantras

2019

Polymer Degradation and Stability

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“…In our previous study [5], the crystallization and melting temperatures of around 292 • C and 340 • C for PEEK were reported. It indicates that the temperature of heated nozzle has to be set higher than 340 • C. However, at around 600 • C, PEEK will decompose accord to the results proposed by Ajeesh et al (2015) [21]. Therefore, two temperatures of the heated nozzle of around 340 • C and 360 • C were set, respectively, in order to make the PEEK filaments melt in the heated nozzle and drop in the form of stalagmites for the building of a 3D object.…”

Section: Resultsmentioning

confidence: 86%

Preparation and Characterization for Antibacterial Activities of 3D Printing Polyetheretherketone Disks Coated with Various Ratios of Ampicillin and Vancomycin Salts

et al. 2019

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In this study, polyetheretherketone (PEEK) materials coated with various ratios of two kinds of antibiotic agents (ampicillin and/or vancomycin salts) were prepared. A modified 3D printer based on fused deposition modeling was employed to prepare PEEK disks. Coating ampicillin and/or vancomycin salts onto the PEEK disks was carried out using the biodegradable poly (lactic-co-glycolic acid) (PLGA) polymer as a binder and a control unit for the drug release in the buffer solution. The effects of various rations of ampicillin and/or vancomycin salts in the PLGA polymer on the PEEK substrates, the release profiles of various drugs, and antibacterial activities of the samples were investigated. Temperature of the heated nozzle in a commerical 3D printer was set at 340 °C. After systemic investigations of the qualities of PEEK disks, a diameter of the heated nozzle of 0.6 mm in the 3D printer was employed for the preparation of PEEK disks. Results of drug release profiles from samples into buffer solution show that the antibacterial activities of samples can continue up to 28 days. In the inhibition zone test of samples, the release amounts of antibiotic agents from the PEEK samples can inhibit S. aureus with activity of over 40% in 30 days tests and most of them can have inhibition activities of higher than 60% during the test. These results showed that a simple and low-cost 3D printing method for the preparation of PEEK/antibiotic agents/PLGA samples can have further applications in biomedical-related technology.

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“…25,26 However, decomposition of the PEEK material was observed at a temperature higher than 580 °C, as shown in the TGA result in Figure S1II, which agrees well with the reports proposed in the literature. 25,27 Therefore, the nozzle temperature of the 3D-printing equipment has to be kept in the range 290.5−580 °C. As proposed in the study by Yang et al (2017), 28 increasing the temperature of the heating nozzle and the holder for the PEEK substrate may increase its crystallinity and therefore improve its printing quality.…”

Section: Resultsmentioning

confidence: 99%

Antibacterial Activity Studies of 3D-Printing Polyetheretherketone Substrates with Surface Growth of 2D TiO₂/ZnO Rodlike Arrays

et al. 2022

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Heterogeneous metal implants have been applied in clinical treatments of skeletal wounds, but their low antibacterial properties and the possibility of a release of metal ions may have harmful influences on the human body. Therefore, a polymer implant with low cost, high safety, an elastic modulus similar to that of human bone, and a good antibacterial property must be produced for orthopedic treatments. In this study, the surface of a 3D-printed polyetheretherketone (PEEK) disk was grown with ZnO/TiO 2 rodlike arrays using a chemical bath deposition. X-ray diffraction patterns and transmission electron microscopy images showed that TiO 2 /ZnO rodlike arrays were deposited onto the PEEK substrate. With the direct absorption of antibiotic agents onto the surface of TiO 2 /ZnO/PEEK samples, their antibacterial performances greater than the values of minimum inhibitory concentration required to inhibit the growth of 90% of Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) remained for around 10 days. The concentration of Zn 2+ ions in a buffer solution is reduced with the coating of a TiO 2 layer on a ZnO rodlike array. The sample with absorption from a mixture containing ampicillin and vancomycin salts with a weight ratio of 1:1 had the best inhibitory effect on the growth of E. coli and S. aureus .

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Investigation on polyetheretherketone composite for long term storage of nuclear waste

Cited by 17 publications

References 4 publications

Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications

Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications

Preparation and Characterization for Antibacterial Activities of 3D Printing Polyetheretherketone Disks Coated with Various Ratios of Ampicillin and Vancomycin Salts

Antibacterial Activity Studies of 3D-Printing Polyetheretherketone Substrates with Surface Growth of 2D TiO₂/ZnO Rodlike Arrays

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Investigation on polyetheretherketone composite for long term storage of nuclear waste

Cited by 17 publications

References 4 publications

Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications

Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications

Preparation and Characterization for Antibacterial Activities of 3D Printing Polyetheretherketone Disks Coated with Various Ratios of Ampicillin and Vancomycin Salts

Antibacterial Activity Studies of 3D-Printing Polyetheretherketone Substrates with Surface Growth of 2D TiO2/ZnO Rodlike Arrays

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Antibacterial Activity Studies of 3D-Printing Polyetheretherketone Substrates with Surface Growth of 2D TiO₂/ZnO Rodlike Arrays