Effect of filler content on scratch behavior and tribological performance of polyester/graphene oxide nanocomposite coating / Nedia Gafsi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1269-1280 Titre : Effect of filler content on scratch behavior and tribological performance of polyester/graphene oxide nanocomposite coating Type de document : texte imprimé Auteurs : Nedia Gafsi, Auteur ; Raquel Verdejo, Auteur ; Mohamed Kharrat, Auteur ; Massimiliano Barletta, Auteur ; Miguel Ángel López-Manchado, Auteur ; Maher Dammak, Auteur Année de publication : 2021 Article en page(s) : p. 1269-1280 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Charges (matériaux) Enrobage (technologie) Essais de résilience Frottements (mécanique) Matériaux hybrides Polyesters Rayures Revêtements organiques Tribologie (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : The influence of 0.5, 0.75, and 1 wt.% of graphene oxide (GrO) in nanocomposite coating on scratch behavior and tribological performance was analyzed. Graphite was oxidized using the Marcano and Tour method to obtain graphite oxide, which is thermally exfoliated at 700°C getting graphene oxide. The transformation of graphite to graphene oxide was evaluated via Raman spectroscopy and X-ray diffraction. Effects of graphene oxide content on the friction and wear behavior of polyester composite coatings were evaluated under dry sliding conditions. Experimental findings showed that the addition of 0.5 wt.% GrO was effective in reducing the friction coefficient of polyester coating. Meanwhile, under the same sliding conditions, the wear results revealed that the polyester coating filled with 1 wt.% GrO has better antiwear ability compared to those filled with 0.5 and 0.75 wt.% GrO. From the scratch analyses, we deduced that coating scratch behavior was highly affected by the amount of fillers inside the polyester matrix. In fact, the best friction characteristic and scratch resistance were observed in the case of polyester coatings filled with the lower amount of GrO, namely 0.5 wt.%. Note de contenu : - EXPERIMENTAL DETAILS : Materials - The synthesizing process of graphene oxide - Physico-chemical characterization methods for matrix and fillers - Tribological and scratch characterization - Methodologies - RESULTS AND DISCUSSION : Fillers characterization - Tribological behavior - Scratch test analysis - Table 1 : Chemical composition and the mechanical properties of aluminum alloyTable 2 Residual depth and scratch hardness versus fillers content for polyester/GrO nanocomposite coatings - Table 2 : Residual depth and scratch hardness versus fillers content for polyester/GrO nanocomposite coatings DOI : https://doi.org/10.1007/s11998-021-00489-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00489-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36431 [article]

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Tribo-mechanical and structural characterizations of LLDPE matrix bio-composite reinforced with almond shell micro-particles : effects of the processing methodology / Mongi Boujelben in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 3 (2024)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 39, N° 3 (2024) . - p. 367-377 Titre : Tribo-mechanical and structural characterizations of LLDPE matrix bio-composite reinforced with almond shell micro-particles : effects of the processing methodology Type de document : texte imprimé Auteurs : Mongi Boujelben, Auteur ; Mohamed Abid, Auteur ; Mohamed Kharrat, Auteur ; Maher Dammak, Auteur Année de publication : 2024 Article en page(s) : p. 367-377 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Composites -- Propriétés mécaniques Coquilles d'amande Etat fondu (matériaux) Mélange Particules (matières) Physique de l'état solide Polyéthylène basse densité linéaire Poudres Renforts (matériaux) Tribologie (technologie) Index. décimale : 668.4 Plastiques, vinyles Résumé : The objective of this research work is to examine the effect of mixing operation in the reinforcement of linear low density polyethylene (LLDPE) with almond shell powder (ASP). Two groups of bio-composites mixed in solid state and melt extrusion state were developed by the standard thermo compression molding process. For each group of bio-composites developed, the mass percentage of ASP was varied from 5 % to 40 %. Tensile and friction tests and micro structural analyzes were carried out. The main results show that the addition of ASP particles: decreases the maximum tensile stress and increases the rigidity of the two types of bio-composites produced. A significant improvement was observed in terms of maximum stress and Young’s modulus of the bio-composites mixed in the molten state compared to those mixed in the solid state. Microscopic observations concluded that the melt-blended ASPs were better covered by the LLDPE matrix and the dispersion was successfully achieved. Friction tests have shown an improvement in tribological performance thanks to the addition of an optimal percentage of ASP equal to 20 % in the case of bio-composites mixed in the molten state. From this research work, it can be concluded that the LLDPE/ASP homogenization method influences the mechanical and tribological properties of bio-composites. Note de contenu : - MATERIALS : ASP bio-fillers - LLDPE matrix - Mixing of bio-charges and matrix - CHARACTERIZATION : Microscopic observation - Mechanical characteristics - Friction and wear test - Morphological characterization of wear traces by SEM-EDX - RESULTS AND DISCUSSION : Microscopic observations - Mechanical results - Tribological results DOI : https://doi.org/10.1515/ipp-2023-4384 En ligne : https://drive.google.com/file/d/1K22_jokwDeuk2x4mTXJWnqtYkXWBOv46/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40878 [article]

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