Fabrication and mechanical properties of phenolic foam reinforced with graphene oxide

Abstract

In this article, samples of phenolic foam reinforced with graphene oxide were prepared. Gel time of resole was tested to choose the appropriate foaming agent. Friability and Mechanical properties of the composite were tested. Dynamic mechanical analysis (DMA) was employed to study the mechanical properties in varied temperatures. The results show that gel time is increased 68.2% by using of 0.5% graphene oxide; n-hexane is more fitting as blowing agent for graphene oxide reinforced phenolic foam; Impact toughness increase along with the graphene oxide content. It is not obvious when the amount is lower than 0.3% and there is a sudden enhancement when the amount reaches 0.

Enhancing the electrical conductivity of polyetherimide‐based foams by simultaneously increasing the porosity and graphene nanoplatelets dispersion

“…Ultrasonication has been proven useful in promoting the formation of an electrically conductive network in polymer nanocomposites containing carbon‐based nanoparticles at lower nanoparticle concentrations . Therefore, as enhancement of the electrical conductivity was one of the main goals of this work, high‐power sonication was used prior to foaming to improve the dispersion and avoid reagglomeration of GnP stacks.…”

Lignin particle- and wood flour-reinforced phenolic foams: Friability, thermal stability and effect of hygrothermal aging on mechanical properties and morphology

“…Zhou et al [27] reinforced a phenolic foam with up to 0.9 wt.% of graphene and graphene oxide. The friability of the phenolic foam was slightly increased by incorporating 0.9 wt.% of graphene and significantly decreased (by 30%) with the addition of 0.9 wt.% of graphene oxide.…”

Foaming resol resin modified with polyhydroxylated cardanol and its application to phenolic foams

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