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Article

Experimental Study on the Surface Properties of Nanoalumina-Filled Epoxy Resin Nanocomposites

1
CQM—Centro de Química da Madeira, University of Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
2
CEMMPRE, Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, Portugal
3
Department of Civil Engineering and Architecture, Centre of Materials and Building Technologies (C-MADE), University of Beira Interior, 6201-001 Covilhã, Portugal
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(3), 733; https://doi.org/10.3390/app10030733
Received: 3 January 2020 / Revised: 16 January 2020 / Accepted: 18 January 2020 / Published: 21 January 2020
(This article belongs to the Special Issue Polymeric Composites Reinforced with Nanoparticles)
This article presents an experimental study on the surface properties of epoxy resin nanocomposites (EPNCs) manufactured with a thermosetting epoxy resin (EP)–bisphenol A diglycidyl ether (BADGE)–2-[[4-[2-[4-(Oxiran-2-ylmethoxy)phenyl]propan-2-yl]phenoxy]methyl]oxirane) and filled with alumina nanoparticles (NPs). The NPs consist of pretreated (with a silane agent) alpha alumina with irregular shapes and a 100 nm maximum size. Three weight fractions of NPs were studied: 1, 3, and 5 wt. (%). Two different epoxy (EP) resins were manufactured, one cured and postcured with bis (4-aminophenyl) methane (DDM); and another one cured with 3-dodec-2-enyloxolane-2,5-dione (DDSA) + 8-methyl-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione (MNA). The wettability and the surface roughness of the obtained EPNCs were studied through the measurement of contact angles and topographic images obtained with atomic force microscopy (AFM), respectively. Significant influence of both the loading of NPs and used curing agents was observed. EPNCs cured with DDM were shown to be hydrophobic for 0, 1, and 3 wt. (%) and hydrophilic for 5 wt. (%). Maximum surface roughness was observed for 5 wt. (%). EPNCs cured with DDSA+MNA were shown to be hydrophilic for 0 and 1 wt. (%) and hydrophobic for 3 and 5 wt. (%). The surface roughness decreased as the weight fraction of NPs increased until 3 wt. (%), and then increased for 5 wt. (%). View Full-Text
Keywords: epoxy resin nanocomposites; nano-alumina; curing agents; contact angle; surface roughness epoxy resin nanocomposites; nano-alumina; curing agents; contact angle; surface roughness
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MDPI and ACS Style

Pinto, D.; Amaro, A.M.; Bernardo, L. Experimental Study on the Surface Properties of Nanoalumina-Filled Epoxy Resin Nanocomposites. Appl. Sci. 2020, 10, 733. https://doi.org/10.3390/app10030733

AMA Style

Pinto D, Amaro AM, Bernardo L. Experimental Study on the Surface Properties of Nanoalumina-Filled Epoxy Resin Nanocomposites. Applied Sciences. 2020; 10(3):733. https://doi.org/10.3390/app10030733

Chicago/Turabian Style

Pinto, Deesy, Ana M. Amaro, and Luís Bernardo. 2020. "Experimental Study on the Surface Properties of Nanoalumina-Filled Epoxy Resin Nanocomposites" Applied Sciences 10, no. 3: 733. https://doi.org/10.3390/app10030733

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