Interfacial features of polyamide 6 composites filled with oxidation modified carbon fibres

2009 ◽  
Vol 223 (9) ◽  
pp. 2135-2141 ◽  
Author(s):  
J Li
Keyword(s):  
Carbon Fibre ◽  
Surface Treatment ◽  
Photoelectron Spectroscopy ◽  
Interfacial Adhesion ◽  
Fibre Surface ◽  
Polyamide 6 ◽  
Ozone Treatment ◽  
Carbon Fibres ◽  
Air Oxidation ◽  
Pull Out

Polyacrylonitrile (PAN)-based carbon fibres were surface treated by ozone modification method and air-oxidation treatment. The interfacial properties of carbon fibre reinforced polyamide 6 (CF/PA6) composites were investigated by means of the single fibre pull-out tests. The surface characteristics of carbon fibres were characterized by X-ray photoelectron spectroscopy (XPS). As a result, it was found that interfacial shear strength values of the composites with ozone-treated carbon fibre are greatly increased. XPS results show that ozone treatment increases the amount of carboxyl groups on the carbon fibre surface, thus the interfacial adhesion between carbon fibre and PA6 matrix is effectively promoted. The effect of surface treatment of carbon fibres on the tribological properties of CF/PA6 composites was comparatively investigated. Experimental results revealed that surface treatment can effectively improve the interfacial adhesion between carbon fibre and PA6 matrix. Thus the wear resistance was significantly improved.

Correlation Between Fibre Surface Energetics and Fibre-Matrix Adhesion in Carbon Fibre Reinforced Peek Composite

1989 ◽  
Vol 170 ◽  
Author(s):  
D J Hodge ◽  
B A Middlemiss ◽  
J A Peacock
Keyword(s):  
Carbon Fibre ◽  
Surface Treatment ◽  
Photoelectron Spectroscopy ◽  
Interfacial Strength ◽  
Fibre Surface ◽  
Work Of Adhesion ◽  
Carbon Fibres ◽  
Matrix Adhesion ◽  
Peek Composite ◽  
Fibre Matrix

AbstractSurface energies of carbon fibres at different levels at surface treatment have been determined by a wetting force technique and related to fibre-matrix adhesion in carbon fibre reinforced PEEK composite. The effect of oxidative surface treatment on the surface free energy is detailed, along with the changes in surface oxygen and nitrogen content, as determined by X-ray photoelectron spectroscopy (XPS). The work of adhesion has been calculated for the carbon fibres and thermoplastic, which correlate well with experimental determination of interfacial strength. The technique can therefore be used to predict adhesion levels in fibre reinforced composites.

scholarly journals Electrolytic Surface Treatment for Improved Adhesion between Carbon Fibre and Polycarbonate

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2253 ◽  
Author(s):  
Jan Henk Kamps ◽  
Luke Henderson ◽  
Christina Scheffler ◽  
Ruud van der Heijden ◽  
Frank Simon ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Surface Treatment ◽  
Photoelectron Spectroscopy ◽  
Surface Characteristics ◽  
Fibre Surface ◽  
Single Fibre ◽  
Optimum Level ◽  
Pull Out ◽  
Force Displacement ◽  
Fibre Matrix

To achieve good mechanical properties of carbon fibre-reinforced polycarbonate composites, the fibre-matrix adhesion must be dialled to an optimum level. The electrolytic surface treatment of carbon fibres during their production is one of the possible means of adapting the surface characteristics of the fibres. The production of a range of tailored fibres with varying surface treatments (adjusting the current, potential, and conductivity) was followed by contact angle, inverse gas chromatography and X-ray photoelectron spectroscopy measurements, which revealed a significant increase in polarity and hydroxyl, carboxyl, and nitrile groups on the fibre surface. Accordingly, an increase in the fibre-matrix interaction indicated by a higher interfacial shear strength was observed with the single fibre pull-out force-displacement curves. The statistical analysis identified the correlation between the process settings, fibre surface characteristics, and the performance of the fibres during single fibre pull-out testing.

The effect of carbon fibre surface oxidation on the friction and wear properties of polytetrafluoroethylene composites under oil-lubricated conditions

2009 ◽  
Vol 224 (1) ◽  
pp. 195-200
Author(s):  
J Li ◽  
Y H Su
Keyword(s):  
Tribological Properties ◽  
Photoelectron Spectroscopy ◽  
Interfacial Adhesion ◽  
Large Scale ◽  
Surface Oxidation ◽  
Fibre Surface ◽  
Ozone Treatment ◽  
Air Oxidation ◽  
Wear Properties ◽  
Ptfe Composites

In this study, the effect of air oxidation and ozone surface treatment of carbon fibres (CFs) on tribological properties of CF-reinforced polytetrafluoroethylene (PTFE) composites under oil-lubricated condition was investigated. Experimental results revealed that ozone-treated CF-reinforced PTFE (CF/PTFE) composite had the lowest friction coefficient and wear compared with untreated and air-oxidated composites. An X-ray photoelectron spectroscopy study of the CF surface showed that, after ozone treatment, oxygen concentration was obviously increased, and the amount of oxygen-containing groups on CF surfaces was largely increased. The increase in the amount of oxygen-containing groups enhanced interfacial adhesion between CF and PTFE matrix. With strong interfacial adhesion of the composite, CFs were strongly bonded with PTFE matrix, and large-scale rubbing-off of PTFE was prevented; therefore, the tribological properties of the composite was improved.

scholarly journals Influence of Phenolic Resin Surface Treatment Agent on Interfacial Adhesion of Carbon Fibre Reinforced Epoxy Resin Composites

2007 ◽  
Vol 16 (6) ◽  
pp. 096369350701600 ◽  
Author(s):  
Chao Wang ◽  
Jing Wang ◽  
Yongan Niu
Keyword(s):  
Carbon Fibre ◽  
Surface Treatment ◽  
Epoxy Resin ◽  
Photoelectron Spectroscopy ◽  
Interfacial Adhesion ◽  
Phenolic Resin ◽  
Resin Matrix ◽  
Resin Composites ◽  
Treatment Agent ◽  
Epoxy Resin Composites

To enhance the interfacial adhesion between carbon fibre and epoxy resin matrix, phenolic resin surface treatment agent has been carried out. The influence of phenolic resin treatment agent on interfacial adhesion of carbon fibre reinforced epoxy resin composites were investigated by interlaminar shear strength, atomic force microscopy, X-ray photoelectron spectroscopy and scanning electron microscopy. The results indicated that the interfacial adhesion was improved greatly after carbon fibre treated by phenolic resin surface treatment agent.

The thermal expansion behaviour of polyamide composites filled with surface modified carbon fibre

2009 ◽  
Vol 223 (10) ◽  
pp. 2383-2389 ◽  
Author(s):  
L Jian ◽  
Y Xiaohua
Keyword(s):  
Thermal Expansion ◽  
Carbon Fibre ◽  
Interfacial Adhesion ◽  
Surface Oxidation ◽  
Carbon Fibres ◽  
Air Oxidation ◽  
Thermal Expansion Behaviour ◽  
Oxidation In Air ◽  
Surface Modified ◽  
Expansion Behaviour

A comparison was made of the effects of coupling regents (RES) surface modification and air oxidation on the improvement of the interfacial adhesion of carbon fibres in reinforced polyamide (PA) composites. Results showed that RES modification greatly strengthens the adhesion between the reinforcement and matrix and is superior to improvements produced by surface oxidation in air. The optimum interfacial adhesion was reached at 0.3 wt% RES concentration. The thermal expansion behaviours of the carbon fibre reinforced PA (CF—PA) composite also showed that RES modification improved the interfacial adhesion.

scholarly journals The influence of Carbon Fibre Surface Treatment on Fibre-Fibre Interactions in Multi-Fibre Microcomposites

1994 ◽  
Vol 3 (6) ◽  
pp. 096369359400300 ◽  
Author(s):  
P.W.J. van den Heuvel ◽  
Y.J.W. van der Bruggen ◽  
T. Peijs
Keyword(s):  
Carbon Fibre ◽  
Surface Treatment ◽  
Uniaxial Tension ◽  
Fracture Process ◽  
Fibre Surface ◽  
Carbon Fibres ◽  
Fibre Failure ◽  
Treated Carbon ◽  
Fibre Matrix

Multi-fibre microcomposites were used to study the influence of fibre/matrix adhesion on the fracture process of composites in uniaxial tension. In addition to in-situ microscopic observations, results were quantitatively described using an interaction criterion. In the case of surface treated carbon fibres, fibre-fibre interaction or so-called coordinated fibre failure takes place at inter-fibre spacings of less than nine fibre diameters. Moreover, it was found that the level of fibre surface treatment, i.e. the amount of debonding, significantly influences the amount of fibre-fibre interaction.

A Novel Approach to the Functionalisation of Pristine Carbon Fibre Using Azomethine 1,3-Dipolar Cycloaddition

2015 ◽  
Vol 68 (2) ◽  
pp. 335 ◽  
Author(s):  
Linden Servinis ◽  
Thomas R. Gengenbach ◽  
Mickey G. Huson ◽  
Luke C. Henderson ◽  
Bronwyn L. Fox
Keyword(s):  
Carbon Fibre ◽  
Photoelectron Spectroscopy ◽  
Cycloaddition Reaction ◽  
Fibre Surface ◽  
Single Fibre ◽  
Dipolar Cycloaddition ◽  
Force Microscopy ◽  
Atomic Force ◽  
Novel Approach ◽  
The Matrix

We demonstrate the utilisation of an azomethine 1,3-dipolar cycloaddition reaction with carbon fibre to graft complex molecules onto the fibre surface. In an effort to enhance the interfacial interaction of the fibre to the matrix, the functionalised fibres possessed a pendant amine that is able to interact with epoxy resins. Functionalisation was supported by X-ray photoelectron spectroscopy and the grafting process had no detrimental effects on tensile strength compared with the control (untreated) fibres. Also, microscopic roughness (as determined by atomic force microscopy) and fibre topography were unchanged after the described treatment process. This methodology complements existing methodology aimed at enhancing the surface of carbon fibres for advanced material applications while not compromising the desirable strength profile. Single-fibre fragmentation tests show a statistically significant decrease in fragment length compared with the control fibres in addition to transverse cracking within the curing resin, both of which indicate an enhanced interaction between fibre and resin.

scholarly journals Improved Mechanical Properties of Copoly(Phthalazinone Ether Sulphone)s Composites Reinforced by Multiscale Carbon Fibre/Graphene Oxide Reinforcements: A Step Closer to Industrial Production

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 237 ◽  
Author(s):  
Nan Li ◽  
Xiuxiu Yang ◽  
Feng Bao ◽  
Yunxing Pan ◽  
Chenghao Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Carbon Fibre ◽  
Photoelectron Spectroscopy ◽  
Fibre Surface ◽  
Homogeneous Distribution ◽  
Matrix Interface ◽  
Atomic Force ◽  
Hybrid Fibre ◽  
Interlaminar Shear

The properties of carbon fibre (CF) reinforced composites rely heavily on the fibre-matrix interface. To enhance the interfacial properties of CF/copoly(phthalazinone ether sulfone)s (PPBES) composites, a series of multiscale hybrid carbon fibre/graphene oxide (CF/GO) reinforcements were fabricated by a multistep deposition strategy. The optimal GO loading in hybrid fibres was investigated. Benefiting from the dilute GO aqueous solution and repeated deposition procedures, CF/GO (0.5%) shows a homogeneous distribution of GO on the hybrid fibre surface, which is confirmed by scanning electron microscopy, atomic force microscope, and X-ray photoelectron spectroscopy, thereby ensuring that its PPBES composite possesses the highest interlaminar shear strength (91.5 MPa) and flexural strength (1886 MPa) with 16.0% and 24.1% enhancements, respectively, compared to its non-reinforced counterpart. Moreover, the incorporation of GO into the interface is beneficial for the hydrothermal ageing resistance and thermo-mechanical properties of the hierarchical composite. This means that a mass production strategy for enhancing mechanical properties of CF/PPBES by regulating the fiber-matrix interface was developed.

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