Effects of electron-beam irradiation on surface oxidation of polymer composites

Żenkiewicz, M.; Rauchfleisz, Marta; Czupryńska, J.; Polański, J.; Karasiewicz, Tomasz; Engelgard, W.

doi:10.1016/j.apsusc.2007.05.018

Cited by 25 publications

(15 citation statements)

References 10 publications

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“…An increased wettability, as achieved by glow discharge, could likewise be induced in our experiments [80] by using clinically applied electron-beam sterilization. Our increased wettability of the polymer after e-beam sterilization is in accordance with increased hydrophilicity of the ceramic hydroxyapatite [88] and various (non-resorbable) polymers [89], due to surface oxidation in a dose dependent manner. Since sterilization of the substrate is mandatory before clinical application, the proper technique should be evaluated, since some techniques, like e-beam, can achieve additional positive outcomes for surface functionalization, while care should be taken since the mechanical properties of the polymer can simultaneously be affected.…”

Section: Biocompatibilitymentioning

confidence: 84%

Biodegradable Polymers in Bone Tissue Engineering

et al. 2009

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The use of degradable polymers in medicine largely started around the mid 20th century with their initial use as in vivo resorbing sutures. Thorough knowledge on this topic as been gained since then and the potential applications for these polymers were, and still are, rapidly expanding. After improving the properties of lactic acid-based polymers, these were no longer studied only from a scientific point of view, but also for their use in bone surgery in the 1990s. Unfortunately, after implanting these polymers, different foreign body reactions ranging from the presence of white blood cells to sterile sinuses with resorption of the original tissue were observed. This led to the misconception that degradable polymers would, in all cases, lead to inflammation and/or osteolysis at the implantation site. Nowadays, we have accumulated substantial knowledge on the issue of biocompatibility of biodegradable polymers and are able to tailor these polymers for specific applications and thereby strongly reduce the occurrence of adverse tissue reactions. However, the major issue of biofunctionality, when mechanical adaptation is taken into account, has hitherto been largely unrecognized. A thorough understanding of how to improve the biofunctionality, comprising biomechanical stability, but also visualization and sterilization of the material, together with the avoidance of fibrotic tissue formation and foreign body reactions, may greatly enhance the applicability and safety of degradable polymers in a wide area of tissue engineering applications. This review will address our current understanding of these biofunctionality factors, and will subsequently discuss the pitfalls remaining and potential solutions to solve these problems.

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Section: Biocompatibilitymentioning

confidence: 84%

Biodegradable Polymers in Bone Tissue Engineering

et al. 2009

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“…14 In the present study, however, the A 3400 /A 1300 (calculated peak area ratio between the 3420-3150 and 1395-1330 cm -1 , the latter being the CH 2 bending, the internal standard region) and the A ox /A 1300 (between the carbonyl 1775-1670 and 1395-1330 cm -1 regions) were used to compare the relative extent of the hydroxyl and the carbonyl oxidations present in the samples (Table I) in a manner similar to ISO 5834-4:2005, because the quantitative determination of the individual functional groups based on the FTIR spectra is relatively difficult due to the complex shape of the absorption bands. 15 ESCA Study. Though FTIR/ATR is recognized as a potent method for identifying the changes in the chemical compositions of the polymer surface, the quantitative and the qualitative analyses of the surface oxidation cannot depend solely on FTIR.…”

Section: Resultsmentioning

confidence: 99%

Effect of γ-Ray irradiation on surface oxidation of ultra high molecular weight polyethylene/zirconia composite prepared byin situ ziegler-natta polymerization

et al. 2009

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Novel ultra-high molecular weight polyethylene (UHMWPE)/zirconia composites were previously prepared by the in situ polymerization of ethylene using a Ti-based Ziegler-Natta catalyst supported on to the surface of zirconia, as a bearing material for artificial joints. Tribological tests revealed that a uniform dispersion of zirconia in UHMWPE markedly increased the wear resistance. The effects of zirconia content on the oxidation behavior of the γ-ray-treated UHMWPE/zirconia composite surfaces were examined. The oxidation index that estimates the oxidation degree as the content of total carbonyl compounds was monitored using Fourier transform infrared spectroscopy-attenuated total reflectance. The changes in the surface composition due to the oxidation were confirmed by electron spectroscopy for chemical analysis. The extent of oxidation decreased with increasing zirconia content, which was attributed to the increased crystallinity as well as the decreased polymer portion of the UHMWPE/zirconia composites.

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“…As mentioned earlier, the surface of the recovered reinforcement CF was generally covered by char residue [28] which could be unfavourable chemical groups for strong interfacial interaction. Such chemical groups could act as a barrier, thereby giving weak interactions that could not be improved by the coupling agents investigated in this work.…”

Section: Fibre/ash Content Analysis Of Manufactured Compositesmentioning

confidence: 99%

“…are used as coupling agents or compatibilizers [21,22,27]. The surface of polymer composites and compatibilizer efficiency could be also modified by oxidative effect [28].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the mechanical properties of reinforced LDPE composites made with carbon fibres recovered via solvothermal processing

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et al. 2015

Composites Part B: Engineering

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Carbon fibre was recovered from a thermoset composite via a solvo-thermal process and used as reinforcement in low density polyethylene (LDPE). The oxidized recovered carbon fibres have shown better properties than original non-oxidized fibres. The best interactions between the continuous and dispersed phases were found using 3-aminopropyl-trimetoxysilane and experimentally synthesized polyalkenyl-polymaleic anhydride based polymers. The tensile strength of the prepared composites nearly doubled when 3-aminopropyl-trimetoxysilane was used as compatibilizer, in comparison to the composites prepared without additives. Based on infrared analysis, a chemical reaction has been proposed between -COOH groups of compatibilizers and the -OH groups of the carbon fibre surface for the best composites.

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Effects of electron-beam irradiation on surface oxidation of polymer composites

Cited by 25 publications

References 10 publications

Biodegradable Polymers in Bone Tissue Engineering

Biodegradable Polymers in Bone Tissue Engineering

Effect of γ-Ray irradiation on surface oxidation of ultra high molecular weight polyethylene/zirconia composite prepared byin situ ziegler-natta polymerization

Evaluating the mechanical properties of reinforced LDPE composites made with carbon fibres recovered via solvothermal processing

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