The influence of fibre surface treatment on the formation of an interphase in CFRP

Peters, P.W.M.; Albertsen, H.

doi:10.1007/bf00400893

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…Other plasmas (not necessarily oxidizing) that are also effective involve nitrogen [5], acrylonitrile [5] and trim ethyl silane [11]. Oxidation by solution methods involves wet oxidation [18,19], such as acid treatments [6,20,21]. Plasma treatments are useful for epoxy as well as thermoplastic matrices [6,[13][14][15][16].…”

Section: Interface Engineeringmentioning

confidence: 99%

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Science of composite materials

Chung

2003

Engineering Materials and Processes

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Composite materials are those containing more than one phase such that the different phases are artificially blended together. They are not multiphase materials in which the different phases are formed naturally by reactions, phase transformations or other phenomena.A composite material typically consists of one or more fillers (fibrous or particulate) in a certain matrix. A carbon fiber composite is one in which at least one of the fJ.llers is composed of carbon fibers, either short or continuous, unidirectional or multidirectional, woven or non-woven. The matrix is usually a polymer, a metal, a carbon, a ceramic or a combination of different materials. Except for sandwich composites, the matrix is three-dimensionally continuous, whereas the fJ.ller can be three-dimensionally discontinuous or continuous. Carbon fiber fJ.llers are usually three-dimensionally discontinuous, unless the fibers are three-dimensionally interconnected by weaving or by the use of a binder such as carbon.The high strength and modulus of carbon fibers make them useful as a reinforcement for polymers, metals, carbons and ceramics, even though they are brittle. Effective reinforcement requires good bonding between the fibers and the matrix, especially for short fibers. For an ideally unidirectional composite (i.e., one containing continuous fibers all in the same direction) containing fibers of much higher modulus than that of the matrix, the longitudinal tensile strength is quite independent of the fiber-matrix bonding, but the transverse tensile strength and the flexural strength (for bending in longitudinal or transverse directions) increase with increasing fiber-matrix bonding. On the other hand, excessive fiber-matrix bonding can cause a composite with a brittle matrix (e.g., carbon and ceramics) to become more brittle, as the strong fiber-matrix bonding causes cracks to propagate in a straight line in a direction perpendicular to the fiber-matrix interface, without being deflected to propagate along this interface. In the case of a composite with a ductile matrix (e.g., metals and polymers), a crack initiating in the brittle fiber tends to be blunted when it reaches the ductile matrix, even when the fiber-matrix bonding is strong. Therefore, an optimum degree of fiber-matrix bonding (i.e., not too strong and not too weak) is needed for brittle-matrix composites, whereas a high degree of fiber-matrix bonding is preferred for ductile-matrix composites.The mechanisms of fiber-matrix bonding include chemical bonding, interdiffusion, van der Waals bonding and mechanical interlocking. Chemical

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Section: Interface Engineeringmentioning

confidence: 99%

“…18 During curing, usually performed in the presence of heat and pressure, a thermoset resin hardens gradually owing to the completion of polymerization and the associated cross-linking of the polymer molecules.…”

Section: Polymer-matrix Composites 221 Introductionmentioning

confidence: 99%

Science of composite materials

Chung

2003

Engineering Materials and Processes

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“…As a flexible layer which is typically applied on CF surface, the sizing agent acts an important role on the application of CF, which endows CF with high processing stability and surface quality 17,18 . On the other hand, many research studies 19–22 prove the relevance of sizing process and the improvement of interfacial properties of composites. For example, Yuan et al 23 synthesized semi‐aliphatic polyimide as CF sizing agent, and the interlaminar shear strength (ILSS) and flexural strength of CF/PEEK raised by 23.8% and 7.8%.…”

Section: Introductionmentioning

confidence: 99%

Effects of polyetherimide sizing involving carbon nanotubes on interfacial performance of carbon fiber/polyetheretherketone composites

Liu

Zhao

Fan

et al. 2021

Polymers for Advanced Techs

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The interaction between carbon fiber (CF) and thermoplastic resin presents weakened characteristic, which can be problematic of composites in structural applications. Therefore, it is of great significance to research techniques of CF surface modification to strengthen the interface of composites. Herein, based on the optimization of emulsion composition, polyetherimide (PEI) sizing involving carbon nanotubes (CNTs) was applied on CF surface to enhance the interface of CF/polyetheretherketone (PEEK) composites. The surface morphology, chemical characteristic, and surface energy of modified CF illustrate the effectiveness of this method, and the micro as well as macro interfacial properties of as‐prepared modified CF/PEEK demonstrate the increased tendency. This work may shed some light on industrialized application of the sizing agent for CF reinforced high‐performance engineering plastic composites.

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“…As indispensable reinforcing materials used in advanced composites, carbon fibers (CF) have a series of excellent properties, including high specific strength and modulus, excellent thermal, fatigue, and chemical corrosion resistance [1][2][3]. CF reinforced composites are suitable for applications such as satellites, launch vehicles, or aircrafts, for reducing weight or improving mechanical performance [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sizing Agents on Surface Properties of T800 Grade CF and Thermal Aging Time on Mechanical Properties of T800 Grade CF/Epoxy Composites

Yang

Zhao

Liu

et al. 2021

International Journal of Polymer Science

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This paper investigates the effect of sizing agent molecular weight on carbon fiber (CF) surface properties and the effect of thermal aging time on mechanical properties of CF/epoxy composites. The surface properties of three CCF800 CF samples with varying sizing agent molecular weight were characterized by surface morphology, surface roughness, chemical functional groups, and element composition. The results showed that the sample with low molecular weight exhibited low roughness and high proportion of activated carbon atoms. The flexural strength, flexural modulus, and interlaminar shear strength of CCF800/5228 composites were measured at 25°C and 150°C by thermal ageing time 0, 100 h, 250 h, 500 h, and 1000 h. The results showed that the thermal aging time up to 1000 h had little effect on the flexural modulus, and the interlaminar shear performance at 150°C showed a trend of increasing at the beginning and then decreasing.

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The influence of fibre surface treatment on the formation of an interphase in CFRP

Cited by 10 publications

References 9 publications

Science of composite materials

Science of composite materials

Effects of polyetherimide sizing involving carbon nanotubes on interfacial performance of carbon fiber/polyetheretherketone composites

Effect of Sizing Agents on Surface Properties of T800 Grade CF and Thermal Aging Time on Mechanical Properties of T800 Grade CF/Epoxy Composites

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