Electrochemical oxidation of carbon fibres

Adsorption of the electrolyte and its effect on interfacial adhesion

L. Százdi, János Gulyás, B. Pukánszky

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A preliminary study indicated the adsorption of sodium hydroxide electrolyte to carbon fibre oxidised in a continuous anodic electrochemical process. The adhesion of the oxidised fibres to epoxy resin decreased with increasing amount of adsorbed NaOH. In this study, experiments were carried out to confirm the preliminary observations. Bundles of fibres were soaked in water and both the solution and the fibre were analysed. The results proved that sodium hydroxide is removed slowly from the fibre surface, more than 20 h is needed to create a relatively clean surface. The adsorbed NaOH blocks reactive groups and hinders coupling between the matrix and the fibre. Its removal increases both the chemical and the electrochemical activity of the fibre and leads to a significant improvement of interfacial adhesion.

Original languageEnglish
Pages (from-to)1361-1365
Number of pages5
JournalComposites Part A: Applied Science and Manufacturing
Volume33
Issue number10
DOIs
Publication statusPublished - Oct 2002

Fingerprint

Electrochemical oxidation
Electrolytes
Carbon fibers
Adhesion
Adsorption
Fibers
Sodium Hydroxide
Sodium
Epoxy Resins
Epoxy resins
carbon fiber
Water
Experiments

Keywords

  • A. Carbon fibre
  • B. Fragmentation
  • B. Interface/interphase
  • D. Surface analysis

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

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title = "Electrochemical oxidation of carbon fibres: Adsorption of the electrolyte and its effect on interfacial adhesion",
abstract = "A preliminary study indicated the adsorption of sodium hydroxide electrolyte to carbon fibre oxidised in a continuous anodic electrochemical process. The adhesion of the oxidised fibres to epoxy resin decreased with increasing amount of adsorbed NaOH. In this study, experiments were carried out to confirm the preliminary observations. Bundles of fibres were soaked in water and both the solution and the fibre were analysed. The results proved that sodium hydroxide is removed slowly from the fibre surface, more than 20 h is needed to create a relatively clean surface. The adsorbed NaOH blocks reactive groups and hinders coupling between the matrix and the fibre. Its removal increases both the chemical and the electrochemical activity of the fibre and leads to a significant improvement of interfacial adhesion.",
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T2 - Adsorption of the electrolyte and its effect on interfacial adhesion

AU - Százdi, L.

AU - Gulyás, János

AU - Pukánszky, B.

PY - 2002/10

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N2 - A preliminary study indicated the adsorption of sodium hydroxide electrolyte to carbon fibre oxidised in a continuous anodic electrochemical process. The adhesion of the oxidised fibres to epoxy resin decreased with increasing amount of adsorbed NaOH. In this study, experiments were carried out to confirm the preliminary observations. Bundles of fibres were soaked in water and both the solution and the fibre were analysed. The results proved that sodium hydroxide is removed slowly from the fibre surface, more than 20 h is needed to create a relatively clean surface. The adsorbed NaOH blocks reactive groups and hinders coupling between the matrix and the fibre. Its removal increases both the chemical and the electrochemical activity of the fibre and leads to a significant improvement of interfacial adhesion.

AB - A preliminary study indicated the adsorption of sodium hydroxide electrolyte to carbon fibre oxidised in a continuous anodic electrochemical process. The adhesion of the oxidised fibres to epoxy resin decreased with increasing amount of adsorbed NaOH. In this study, experiments were carried out to confirm the preliminary observations. Bundles of fibres were soaked in water and both the solution and the fibre were analysed. The results proved that sodium hydroxide is removed slowly from the fibre surface, more than 20 h is needed to create a relatively clean surface. The adsorbed NaOH blocks reactive groups and hinders coupling between the matrix and the fibre. Its removal increases both the chemical and the electrochemical activity of the fibre and leads to a significant improvement of interfacial adhesion.

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KW - B. Interface/interphase

KW - D. Surface analysis

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