RT Journal Article
T1 Effect of gold nanoparticles on the physical properties of an epoxy resin
A1 Fraga López, Francisco
A1 Jiménez Carrillo, María Lisbeth
A1 Vázquez Tato, María del Pilar
A1 Seijas Vázquez, Julio Antonio
A1 Meijide del Río, Francisco Ángel
A1 Vázquez Tato, José
A1 Jover Ramos, Aida
K1 Bisphenol A Diglycidyl Ether (DGEBA)
K1 M-xylylenediamine
K1 Gold nanoparticles
K1 Epoxy resin
K1 Glass transition temperature
K1 Degree of conversion
AB The effect of doping the bisphenol A diglycidyl ether (DGEBA)/m-xylylenediamine (mXDA) system with gold nanoparticles (AuNP) has been studied with differential scanning calorimetry (DSC), thermogravimetric analysis, dynamic mechanical analysis (DMA), and dielectric analysis (DEA). The evolved heat (DHt), the glass transition temperature (Tg), and the associated activation energies of this relaxation process have been determined. Below a certain concentration of AuNPs (=8.5%, in mg AuNP/g epoxy matrix), Tg decreases linearly with the concentration of AuNPs, but above it, Tg is not affected. The degree of conversion a of this epoxy system was analyzed by the semiempirical Kamal’s model, evidencing that diffusion correction is required at high values of a. Activation energy values suggest that AuNPs can cause some impediments at the beginning of the crosslinking process (n-order mechanism). The slight difference between the initial decomposition temperature, as well as the temperature for which the degradation rate is at a maximum, for both systems can be accepted to be within experimental error. Mechanical properties (tension, compression, and bending tests) are not affected by the presence of AuNPs. Dielectric measurements show the existence of a second Tg at high temperatures, which was analyzed using the Tsagarapoulos and Eisenberg model of the mobility restrictions of network chains bound to the filler.
PB MDPI
YR 2023
FD 2023
LK http://hdl.handle.net/10347/33790
UL http://hdl.handle.net/10347/33790
LA eng
NO Fraga-López, F., Carrillo, L. J., Vázquez-Tato, M. P., Seijas, J. A., Meijide, F., Vázquez Tato, J. & Jover, A. (2023). Effect of gold nanoparticles on the physical properties of an epoxy resin. International Journal of Molecular Sciences, 24(6), 5638-. https://doi.org/10.3390/ijms24065638
NO This research has been supported by Ministerio de Ciencia y Tecnología (Project MAT2017-86109P), Spain.
DS Minerva
RD 29 abr 2026