Tuning the mechanical properties of epoxy-acrylate core-shell nanostructured film via epoxy concentration in the core layer / Eyann Lee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 4 (07/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 4 (07/2024) . - p. 1241-1254 Titre : Tuning the mechanical properties of epoxy-acrylate core-shell nanostructured film via epoxy concentration in the core layer Type de document : texte imprimé Auteurs : Eyann Lee, Auteur ; Zulkifli Mohamad Ariff, Auteur ; Mohamad Danial Shafiq, Auteur ; Raa Khimi Shuib, Auteur ; Muhamad Sharan Musa, Auteur Année de publication : 2024 Article en page(s) : p. 1241-1254 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements Caractérisation Copolymère époxy acrylate Couches minces Nanoparticules Nanostructures Polymérisation en émulsion Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Epoxy-acrylate (EA) core–shell nanoparticles have gained significant attention recently due to their dual unique properties as heterogeneous materials, particularly in coating applications. However, the effect of epoxy (EP) concentration in core layer on mechanical properties is still limited, and the mechanism of how it affects the film's performance is not well understood. In this study, we investigate the effect of varying EP concentration in the core layer on the mechanical properties of nanostructured films containing EA core–shell nanoparticles. The core–shell nanoparticles were synthesized through multistage seeded emulsion polymerization. The transmission electron microscopy (TEM) images revealed similar particle morphology and size in all EA nanoparticles. Differential scanning calorimetry (DSC) analysis confirmed the successful synthesis of core–shell particle morphology with two glass transition temperature (Tg) values (~12 °C and ~ 60 °C) observed for the core and shell layers, respectively. We observed an increase in the Tg values of the shell layer with higher EP content in the core layer. The use of EP-based copolymers raised the Tg values of the shell layer, significantly affecting the film formation behavior and their mechanical properties through interlayer crosslinking. Tensile modulus values for the films ranged from 200 to 500 MPa, marking the highest modulus reported for cast films of EA nanostructured films. Our findings reveal a straightforward and versatile method for producing high-modulus EA nanostructured films with customizable mechanical properties, making the model ideal for enhancing wood coating performance. Note de contenu : - EXPERIMENTAL : Materials - Preparation of polyacrylate seed nanoparticles - Preparation of WEA core-shell nanoparticles - Preparation of EA nanostructured film - Characterizations - RESULTS AND DISCUSSION : Particle's physical properties and morphology - Fourier transform infrared spectroscopy - Interlayer crosslinking mechanism - Film appearance and formation mechanism - Glass transition temperature and thermal stability - Tensile properties - Hardness and adhesion strength - Hydrophilicity and water uptake - Shelf-life stability test DOI : https://doi.org/10.1007/s11998-023-00888-y En ligne : https://drive.google.com/file/d/1nQYW3cAQkWLTs4iWjaqLtxSSASQ9fZTQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41294 [article]

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