Effect of carbonaceous nanofillers and triblock copolymers on the toughness of epoxy resin

Lavoratti, Alessandra; Zattera, Ademir J.; Amico, Sandro Campos

doi:10.1007/s00289-020-03375-1

Cited by 4 publications

(1 citation statement)

References 31 publications

(58 reference statements)

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“…These findings were in accordance with literature data, reporting that the incorporation of a plasticizer into an epoxy matrix results to a reduced storage modulus (Figure 25). 32–36 …”

Section: Resultsmentioning

confidence: 99%

Manufacturing technology and dynamic mechanical investigation of moisture‐resistant Luffa cylindrica‐reinforced epoxy composites

Papanicolaou

Zaoutsos

Anastasiou

2021

J of Applied Polymer Sci

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Natural fiber (NF)‐reinforced thermosetting composites exhibit excellent properties but, due to the usually hygroscopic nature of the fibers, these composites may suffer from the effects of moisture absorption. Luffa cylindrica is a NF, potentially useful in the manufacture of composite materials, but it is highly hygroscopic. A technology is developed for the fabrication of moisture‐resistant L. cylindrica‐reinforced epoxy composites and the various parameters that affect the process are investigated using long‐term moisture absorption experiments and dynamic mechanical analysis of dry and moist specimens. The technology concludes to a L. cylindrica‐reinforced bilayer matrix made of a first linseed oil‐modified precured epoxy and a final unmodified epoxy layer. This composite offers a reduced water absorbance by 33% and an almost identical Tg compared to the non‐modified epoxy reinforced with L. cylindrica. The same technology is used to manufacture water‐resistant L. cylindrica‐reinforced composites from both, environmentally friendly, matrix and reinforcement.

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“…These findings were in accordance with literature data, reporting that the incorporation of a plasticizer into an epoxy matrix results to a reduced storage modulus (Figure 25). 32–36 …”

Section: Resultsmentioning

confidence: 99%

Manufacturing technology and dynamic mechanical investigation of moisture‐resistant Luffa cylindrica‐reinforced epoxy composites

Papanicolaou

Zaoutsos

Anastasiou

2021

J of Applied Polymer Sci

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Effect of graphene nanoplatelets on mechanical and impact properties of an aramid/glass-reinforced epoxy composite

2022

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This study aims to characterize and evaluate the effects of graphene nanoplatelets (GnPs) added to the epoxy matrix and the fiber stacking sequence on the mechanical and impact responses of carbon/aramid hybrid composites. For this purpose, Aramid/Glass/Aramid and Glass/Aramid/Glass stacking sequences as well as full Aramid and Glass fiber configurations were used in an epoxy matrix with various contents (0.1, 0.25, 0.5 wt%) of GnPs. Tensile and flexural tests were conducted per mechanical characterization and low-velocity impact (LVI) tests with 30 J impact energy were performed by a drop-weight impact test. According to results, aramid fiber location has a significant effect on the peak load values, absorbed energy, and displacement of the hybrid composites. In addition, the inclusion of 0.25 wt% GnPs into the epoxy matrix increased the LVI properties of pure glass and hybrid fiber-reinforced composites. However, the incorporation of GnPs into the epoxy matrix caused a deterioration in the LVI properties of the aramid fiber-reinforced composite plates. Moreover, the best increase in the mechanical properties of pure and hybrid fiber-reinforced composites was obtained by adding 0.1 and 0.25% wt% GnPs into the epoxy matrix.

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Epoxy resin/graphene nanoplatelets composites applied to galvanized steel with outstanding microwave absorber performance

Oliveira

Lavoratti

Pereira

et al. 2022

Journal of Polymer Engineering

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The necessity of new electromagnetic interference shielding materials has expanded scientific research, especially with regard to microwave frequency range (X-band). In this context, polymer-based composites with nanoparticles – such as graphene – are promising electromagnetic interference shielding materials. In this work, epoxy resin/graphene nanoplatelets (NPG) composites with 0.10, 0.25 and 0.5% w/w were developed and applied to galvanized steel substrates. Dynamic-mechanical tests showed that the addition of NGPs increased the resin rigidity due to molecular restrictions of the organic chains imposed by the NPG. With the increase of the NPG concentration to 0.50%, the impact strength and the adhesion of the composites significantly decreased due to the formation and propagation of large cracks, followed by delamination. The epoxy resin sample containing 0.25% NPG presented the best microwave absorber performance with an increase of 48% in the attenuated energy and 80% in the reflection loss, respectively. Moreover, this sample extended the microwave absorption range to 10 GHz.

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Effect of carbonaceous nanofillers and triblock copolymers on the toughness of epoxy resin

Cited by 4 publications

References 31 publications

Manufacturing technology and dynamic mechanical investigation of moisture‐resistant Luffa cylindrica‐reinforced epoxy composites

Manufacturing technology and dynamic mechanical investigation of moisture‐resistant Luffa cylindrica‐reinforced epoxy composites

Effect of graphene nanoplatelets on mechanical and impact properties of an aramid/glass-reinforced epoxy composite

Epoxy resin/graphene nanoplatelets composites applied to galvanized steel with outstanding microwave absorber performance

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