Role of fibre–matrix interface and fibre direction on dielectric behaviour of epoxy composites

Kchaou, B.; Turki, C.; Salvia, Michelle; Fakhfakh, Z.; Tréheux, D.

doi:10.1016/j.compscitech.2003.10.016

Cited by 22 publications

(33 citation statements)

References 8 publications

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“…We can think that the incorporation of fibres or the creation of the fibre/matrix interface supports this phenomenon of delocalization of the charges and, consequently, the reduction in the polarization energy. Such a phenomenon has the effect of increasing the mechanical properties as seen previously for composites with epoxy matrix reinforced with glass fibres E [18]. In addition, a drying of fibres before the introduction into the composite is favourable.…”

Section: Mirror and Induced Current Methods (Icm)mentioning

confidence: 55%

“…-X-ray diffraction analysis of materials shows that the presence of hemp fibres modifies the lattice parameter of polypropylene in composite materials due to internal stresses. -As for continuous E-glass fibres [18], tests performed on hemp fibre reinforced composites prove that hemps fibres modify the dielectric response of the polymeric matrix. The fibres, or more probably the fibres/matrix interfaces, allow a diffusion of the electric charges which delocalizes the polarization energy.…”

Section: Discussionmentioning

confidence: 99%

“…In fact, both mechanical and dielectric catastrophic effects could be due to the trapping-detrapping of electric charges on intrinsic or extrinsic structural defects [13,14]. Previous papers have shown the significant role of the fibre/matrix interface (glass fibre E/epoxy matrix), on the motion of the electric charges related to the interface nature: a material that favours the diffusion of electric charges along interfaces has better mechanical and tribological properties [17,18]. In this study, this approach is applied and focuses on composites with isotactic polypropylene (iPP) organic matrix reinforced by hemp natural fibres, fabricated by a new dry impregnation process.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and dielectric characterization of hemp fibre reinforced polypropylene (HFRPP) by dry impregnation process

Kechaou¹,

Salvia²,

Beaugiraud³

et al. 2010

Express Polym. Lett.

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Abstract. Natural fibres such as jute, coir, sisal, bamboo and pineapple are known to have high specific strength and can be effectively used in composites in various applications. The use of hemp fibres to reinforce the polymer aroused great interest and expectations amongst scientists and materials engineers. In this paper, composites with isotactic polypropylene (iPP) matrix and hemp fibres were studied. These materials were manufactured via the patented FIBROLINE process based on the principle of the dry impregnation of a fibre assembly with a thermoplastic powder (iPP), using an alternating electric field. The aim of this paper is to show the influence of fibre/matrix interfaces on dielectric properties coupled with mechanical behaviours. Fibres or more probably the fibre/matrix interfaces allow the diffusion of electric charges and delocalise the polarisation energy. In this way, damages are limited during mechanical loading and the mechanical properties of the composites increase. The structure of composite samples was investigated by X-ray and FTIR analysis. The mechanical properties were analysed by quasistatic and dynamic tests. The dielectric investigations were carried out using the SEMME (Scanning Electron Microscope Mirror Effect) method coupled with the measurement of the induced current (ICM).

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Section: Mirror and Induced Current Methods (Icm)mentioning

confidence: 55%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical and dielectric characterization of hemp fibre reinforced polypropylene (HFRPP) by dry impregnation process

Kechaou¹,

Salvia²,

Beaugiraud³

et al. 2010

Express Polym. Lett.

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“…In addition, the importance of these interfaces on the trapping or on the diffusion of the electric charges was previously demonstrated [1]. In this context, tribological studies, which associate the mechanical and the electric effects (tribo-electrification), must make it possible to correlate friction coefficient and wear with the role of the electric charges.…”

Section: Introductionmentioning

confidence: 96%

Dielectric and friction behaviour of unidirectional glass fibre reinforced epoxy (GFRE)

Kchaou

Turki

Salvia

et al. 2008

Wear

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“…The interfaces between particles and matrix material play a significant role in the relative permittivity [1][2][3]. It has been shown experimentally that the electric performance of a particle can be improved with surface modification [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Interface properties influence the effective dielectric constant of composites

Chatzigeorgiou

Javili

Steinmann

2015

Philosophical Magazine

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Erlangen-Nuremberg, Egerlandstr. 5, 91058 Erlangen, Germany In this work we propose a micromechanics model, based on the composite spheres assemblage method, for studying the electrostatic behaviour of particle and porous composites when the interface between the particle (or the pore) and the matrix has its own independent behaviour. Examples from experimental results in porous media and particle composites are utilized to demonstrate the model's capabilities. The current model shows a better agreement with experiments compared with other available studies. Furthermore, it is shown that the interface dielectric constant is independent of the experiments which prove its nature as a material parameter.

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Role of fibre–matrix interface and fibre direction on dielectric behaviour of epoxy composites

Cited by 22 publications

References 8 publications

Mechanical and dielectric characterization of hemp fibre reinforced polypropylene (HFRPP) by dry impregnation process

Mechanical and dielectric characterization of hemp fibre reinforced polypropylene (HFRPP) by dry impregnation process

Dielectric and friction behaviour of unidirectional glass fibre reinforced epoxy (GFRE)

Interface properties influence the effective dielectric constant of composites

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