Optimization of interfacial properties of carbon fiber/epoxy composites via a modified polyacrylate emulsion sizing

Yuan, Xiaomin; Zhu, Bo; Cai, Xiaoqing; Liu, Jianjun; Qiao, Ke; Yu, Junwei

doi:10.1016/j.apsusc.2016.12.234

Cited by 117 publications

(64 citation statements)

References 34 publications

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“…Carbon fiber composites exhibit enhanced mechanical performances, such as extremely high strength and modulus, good stiffness, and creep resistance etc. [1][2]. However, according to the literature [3], due to lack of fiber-matrix strong chemical bonding, the application of stress to the carbon fiber composite results in poor mechanical properties, e.g.…”

Section: Introductionmentioning

confidence: 99%

Assessing the integrity of CFRPs through nanomechanical mapping: the effect of CF surface modification

2018

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Abstract. The purpose of this study is to assess the effect of CF surface modification in enhancement of the wetting properties of carbon fibers in order to improve the adhesion force between the fiber and the polymer matrix; for this, the integrity of CFRPs through nanomechanical mapping was evaluated. The surface of commercial carbon fibers was functionalized through cyclic voltammetry in aqueous electrolyte solutions of H2SO4, in the presence of acrylic acid, methacrylic acid, acrylonitrile and Nvinylpyrrolidone monomers. The produced surface modified carbon fibers were embedded in epoxy resin. Elastic modulus nanoindentation mapping was performed in order for elastic modulus to be calculated, as a qualitative assessment of fibre -matrix interaction. For this, a grid protocol was set up for the integrity assessment of CFRPs through nanomechanical mapping.

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Section: Introductionmentioning

confidence: 99%

Assessing the integrity of CFRPs through nanomechanical mapping: the effect of CF surface modification

2018

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“…For further investigation of the interfacial phase structures of CFRPs, the phase imaging and force modulation microscopy are adopted to study the stiffness of various phases in unidirectional carbon fiber/epoxy composites, which allows a qualitative statement about the local modulus of sample surface using an oscillating cantilever tip that indents into the sample surface . The force modulation images obtained from the cross‐section of the composites reinforced by differently sized carbon fibers are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, carbon fibers are primarily preferred for carbon fiber reinforced polymer (CFRP) usage if there is an effective interface between the fibers and the matrix. However, due to the chemical inertness on carbon fiber surface , it is necessary to further apply surface treatments such as oxidation , plasma , radiation , and grafting to obtain a favorable interfacial adhesion. Remarkably, among these methods, sizing plays an important role for improving the interfacial properties of CFRPs .…”

Section: Introductionmentioning

confidence: 99%

“…Notice that sizing emulsion with multimodal PSD can usually increase the up limit of solid content in sizing since small particles are able to fit into the interstices between large particles . Furthermore, if the difference on particle diameters and volume percentage is in a reasonable range, small particles will efficiently pack into the voids among the large particles, thus increasing the maximum packing factor of particles . Motivated by this, the PSD of an emulsion can be controlled by different strategies such as varying emulsion preparation conditions and system composition .…”

Section: Introductionmentioning

confidence: 99%

“…In our previous work, we have adopted 2,2,2‐trifluoroethyl acrylate and polydimethylsiloxane to modify polyacrylate and successfully prepared a waterborne polyacrylate sizing agent containing multiphase polymeric system . In this article, we continue to use this self‐made sizing agent.…”

Section: Introductionmentioning

confidence: 99%

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Effects of particle size and distribution of the sizing agent on carbon fiber/epoxy composites interfacial adhesion

et al. 2017

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This article aims to study the effects of particle size and distribution (PSD) of sizing agent on surface physical and chemical properties of the carbon fiber. Five kinds of sizing agents with various PSD named P‐1 to P‐5 sizing were applied in order to investigate the influences on interfacial properties between the carbon fiber and the matrix. The surface characteristics of carbon fibers were investigated to determine morphology, chemical composition, surface energy, interfacial thickness, and interlaminar shear strength (ILSS). The results revealed that, as the particle size decreasing, the O1s/C1s composition ratios, surface energy and the interfacial thickness show a growing trend whereas the surface roughness reduces mildly. Similarly, the ILSS of the carbon fiber/epoxy composites have also increased by more than 8% with the decreased particle size. This demonstrates that small particle size with multimodal PSD in sizing is advantageous for effective wetting and force transition in the interfacial adhesion. Actually, when the mean particle size is around 110 nm (P‐3 sizing), the emulsion droplets can repair the surface irregularity and hold back excessive stress most remarkably, leading to optimal contributions to the improvement of ILSS. Based on these results, a mechanism concerning particle arrangement in sizing and interfacial strengthening in carbon fiber/epoxy composites was proposed, which provided a reasonable explanation to analyze the effects of PSD in sizing and interfacial bonding. POLYM. COMPOS., 39:E2036–E2045, 2018. © 2017 Society of Plastics Engineers

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Constructing “Soft‐Stiff” Structure on the Surface of Carbon Fiber to Enhance the Interfacial Properties of Its Epoxy Composites

Wen

Liu

et al. 2022

Adv Materials Inter

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A “soft‐stiff” structure is equipped onto carbon fiber (CF) surface by hydrothermal and self‐assembly methods, in which MnO2 nanosheets and natural polysaccharide chitosan (CS) act as “stiff” phase and “soft” phase, respectively, leading to strong interfacial phase in CF/epoxy composite. The roughness, polar functional group content, and wettability of the CF surface are significantly promoted by this protocol. Moreover, the unique structure also serves as a buffer area to relieve stress concentration and change the direction of crack propagation, thus enhancing the interfacial properties of the composites. The strengthening effect of the “soft‐stiff” structure is verified by interlaminar shear strength (ILSS) and flexural strength tests, which are improved by 47.4% and 48.2%, respectively compared with pristine CF/epoxy composites. This work provides a potential reinforcement strategy to access high‐performance CF composites.

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Optimization of interfacial properties of carbon fiber/epoxy composites via a modified polyacrylate emulsion sizing

Cited by 117 publications

References 34 publications

Assessing the integrity of CFRPs through nanomechanical mapping: the effect of CF surface modification

Assessing the integrity of CFRPs through nanomechanical mapping: the effect of CF surface modification

Effects of particle size and distribution of the sizing agent on carbon fiber/epoxy composites interfacial adhesion

Constructing “Soft‐Stiff” Structure on the Surface of Carbon Fiber to Enhance the Interfacial Properties of Its Epoxy Composites

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