Effects of dispersion techniques of carbon nanofibers on the thermo-physical properties of epoxy nanocomposites

Prolongo, S.G.; Buron, Marie-Pierre; Gude, M.R.; Chaos-Morán, R.; Campo, M.; Ureña, A.

doi:10.1016/j.compscitech.2008.05.015

Cited by 97 publications

(46 citation statements)

References 28 publications

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“…They had an average diameter of 9.5 nm and were 1 (am in length. These data, provided by the manufacturer, match the characterization performed in previous works [15,16]. Epoxy resin was obtained from a basic diglycidilether bisphenol A (DGBEA) monomer (Araldite LY556) cured with an aromatic amine (Araldite XB3473), both purchased from Huntsman.…”

Section: Sample Preparationmentioning

confidence: 72%

Joule effect self-heating of epoxy composites reinforced with graphitic nanofillers

et al. 2016

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Self-heating of conductive nanofilled resins due to the Joule effect is interesting for numerous applications, including computing, self-reparation, self-post-curing treatment of resins, fabrication of adhesive joints, de-icing coatings and so on. In this work, we study the effect ofthe nature and amount of graphitic nanofiller on the self-heating of epoxy composites.The addition of graphitic nanofillers induced an increase in the thermal conductivity ofthe epoxy resins, directly proportional to the nanofiller content. Percolation was not observed because ofthe heat transport through phonons. In contrast, the electrical conductivity curves present a clear percolation threshold, due to the necessity of an electrical percolation network. The electrical threshold is much lower for composites reinforced with carbon nanotubes (CNTs, 0.1 wt.%) than for the resin filled with graphene nanoplatelets (GNPs, 5 %). This fact is due to their very different specific areas.The composites filled with CNTs reach higher temperatures than the ones reinforced with GNPs, applying low electrical voltage because of their higher electrical conductivity. In contrast, the self-heating is more homogeneous for the GNP/epoxy resins due to their higher thermal conductivity. It was also confirmed that the self-heating is repetitive in several cycles, reaching the same temperature when the same voltage is applied.M S. G. Prolongo

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Section: Sample Preparationmentioning

confidence: 72%

Joule effect self-heating of epoxy composites reinforced with graphitic nanofillers

et al. 2016

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“…According to the procedure optimized in a previous work [15], CNTs were first dispersed in chloroform, by magnetic stirring at 45ºC for 30min, before adding the monomer epoxy. This DGEBA-CNT-chloroform mixture was stirred with high shear mechanical mixer at 45ºC for 30 min and then was sonicated for 45 min at the same temperature.…”

Section: Fabrication Of Cnt/epoxy Compositesmentioning

confidence: 99%

Improving the flexural and thermomechanical properties of amino-functionalized carbon nanotube/epoxy composites by using a pre-curing treatment

Prolongo

Gude

Ureña

2011

Composites Science and Technology

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Please cite this article as: Prolongo, S.G., Gude, M.R., Ureña, A., Improving the flexural and thermomechanical properties of amino-functionalized carbon nanotube/epoxy composites by using a pre-curing treatment, Composites Science and Technology (2011), doi: 10.1016/j.compscitech.2011 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ABSTRACT:A prior thermal (pre-curing) treatment of mixtures of epoxy monomer and amino-functionalized carbon nanotubes (CNTs) was used to promote a chemical reaction between the matrix and the reinforcement, favouring the formation of a strong interface. Samples of epoxy resin and different weight percentages of amino-functionalized multi-walled CNTs were prepared with and without the pre-curing treatment (150ºC, 1 hour). The degree of dispersion of the nanofiller was better when this pre-curing treatment was used. This allowed a higher CNT content while keeping a high sample homogeneity. Without the pre-curing step, the addition of CNTs increases both the flexural strength and strain to failure by 45%. Moreover, with the pre-curing step, the nanocomposite with 0.25 wt % CNTs presents an increase of flexural strength by 58% and strain to failure by 68% regard to neat epoxy

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“…This increase seems be associated with the worse dispersion of the nanofiller into the adhesive. It was demonstrated, in works published in Composites Science and Technology (Prolongo et al, 2008;, that the epoxy nanocomposites with 0.25 wt % presented a suitable dispersion of filler, although at high magnifications, it was possible to observe that the nanofibers tend to be tangled. However, at relative higher nanofibers contents, it was observed the appearance of large agglomerates, with one or more microns of diameters.…”

Section: Adhesives Reinforced With Carbon Nanofibersmentioning

confidence: 99%

“…For it, numerous alternatives have been proposed (Xie et al, 2005;Vaisman et al, 2006;Prolongo et al, 2008) such as the use of solvents and surfactants to disperse rightly the CNTs with the epoxy monomer. Other www.intechopen.com proposals are based on the application of high mixing forces, using high shear mechanical mixers or ultrasonic.…”

Section: Adhesives Reinforced With Carbon Nanotubesmentioning

confidence: 99%

Nanoreinforced Adhesives

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2010

Nanofibers

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Effects of dispersion techniques of carbon nanofibers on the thermo-physical properties of epoxy nanocomposites

Cited by 97 publications

References 28 publications

Joule effect self-heating of epoxy composites reinforced with graphitic nanofillers

Joule effect self-heating of epoxy composites reinforced with graphitic nanofillers

Improving the flexural and thermomechanical properties of amino-functionalized carbon nanotube/epoxy composites by using a pre-curing treatment

Nanoreinforced Adhesives

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