Resin impregnation and interfacial adhesion behaviors in carbon fiber/epoxy composites: Effects of polymer slip and normalized surface free energy with respect to the sizing agents

Lim, Su Hyun; On, Seung Yoon; Kim, Hyoungsoo; Bang, Yun Hyuk; Kim, Seong Su

doi:10.1016/j.compositesa.2021.106424

Cited by 20 publications

(9 citation statements)

References 37 publications

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“…On the basis of the Mori-Tanaka method, each inclusion is considered to be embedded in an infinite matrix under the average stress σ m or average strain ε m of the matrix. The average strain of reinforcement can be expressed as 38,39 ε r ¼ A r : ε m (1) in which A r denotes the strain-concentration tensor specified by…”

Section: Micromechanics Of Graphene-contained Hybrid Compositesmentioning

confidence: 99%

“…This is due to their excellent specific strength and stiffness, good thermal characteristics, and high fatigue endurance. [1][2][3][4] The advanced engineering structures utilized in severe environments demand higherperformance composite materials. So variations in the design and type of composite materials should be very fast in order to satisfy the necessities.…”

Section: Introductionmentioning

confidence: 99%

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Elastic modulus and Poisson’s ratio of graphene nanoplatelet/glass fiber-reinforced polymer hybrid composites subjected to off-axis loading

Hassanzadeh-Aghdam

Jamali

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Effective elastic properties of the graphene nanoplatelet (GNP)/unidirectional glass fiber (GF)-reinforced polyimide composites subjected to off-axis loading are predicted using a closed-form hierarchical micromechanical approach. The effects of volume fraction, agglomeration and non-flat structure of GNPs, graphene/polymer interfacial region, and fiber volume fraction on the off-axis elastic modulus and off-axis Poisson’s ratio are investigated. In order to verify the accuracy of the present micromechanical method, predictions are compared with the experimental data. Adding GNPs into the polymeric resin increases the elastic modulus of all off-axis coupons. When flat GNPs are uniformly dispersed in the polyimide resin, much more improvement in the off-axis elastic properties is achieved. The results indicate that agglomeration and non-flat structure of the GNP can drastically decrease the off-axis elastic modulus. It is observed that the off-axis elastic response of hybrid composites may be sensitive to the material property and thickness of the interfacial region.

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Section: Micromechanics Of Graphene-contained Hybrid Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elastic modulus and Poisson’s ratio of graphene nanoplatelet/glass fiber-reinforced polymer hybrid composites subjected to off-axis loading

Hassanzadeh-Aghdam

Jamali

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…However, in their papers, they did not further explore the relationship between these parameters and the specific surface area and composite interfacial property. Interfacial shear strength (IFSS) is usually tested to evaluate the composite interfacial property by the micro-droplet debonding test [ 32 , 33 , 34 , 35 ]. The calculation of IFSS needs the contact area of interface.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Fiber Surface Microstructure on Composite Interfacial Property Based on Image Quantitative Characterization Technique

2021

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The surface roughness (Ra) and composite interfacial property of carbon fiber (CF) are considered to be mainly affected by the microstructure of the CF surface. However, quantitative characterization of the CF surface microstructure is always a difficulty. How the CF surface microstructure affects the interfacial property of CF composites is not entirely clear. A quantitative characterization technique based on images was established to calculate the cross-section perimeter and area of five types of CFs, as well as the number (N), width (W) and depth (D) of grooves on these CF surfaces. The CF composite interfacial shear strength (IFSS) was tested by the micro-droplet debonding test and modified by the realistic perimeter. The relationship between the groove structure parameter and the Ra, specific surface area and composite interfacial property was discussed in this article. The results indicated that the CF cross-section perimeter calculated by this technique showed strong consistency with the CF specific surface area and composite interfacial property. At last, the composite interface bonding mechanism based on defect capture was put forward. This mechanism can be a guiding principle for CF surface modification and help researchers better understand and establish interface bonding theories.

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“…14−16 The physical and chemical properties of the fibers can be tuned through the modification of the sizing layer. 17 These sized fibers show radically improved performance and handling compared to the unsized ones. 18,19 Sizing at the molecular level is also, in principle, possible for single-walled CNTs (SWNTs) by wrapping polymer-like molecular fragments around them in a noncovalent yet stable manner.…”

mentioning

confidence: 99%

“…Due to their structural and chemical similarity with CNTs, the introduction of carbon fibers as polymer fillers faced similar problems yet has been remarkably successful. With the objective of improving interfacial adhesion, many commercial fibers are now coated with a sizing layer consisting of polymeric materials. − The physical and chemical properties of the fibers can be tuned through the modification of the sizing layer . These sized fibers show radically improved performance and handling compared to the unsized ones. , …”

mentioning

confidence: 99%

Interlocking Matrix and Filler for Enhanced Individualization and Reinforcement in Polymer–Single-Walled Carbon Nanotube Composites

Villalva,

Rapakousiou,

Monclús

et al. 2023

ACS Nano

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Poor individualization and interfacial adhesion prevent single-walled carbon nanotube (SWNT)–polymer composites from reaching outstanding mechanical properties. With much larger diameters, but common structural features (high aspect ratio and absence of functional groups for covalent or supramolecular attachment with the polymer), carbon fibers face similar problems, which are addressed by covering the fibers with a thin layer of polymer. This sizing strategy has allowed carbon fibers to become the filler of choice for the highest performing materials. Inspired by this, here we investigate the use of the mechanical bond to wrap SWNTs with a layer of polymeric material to produce SWNTs mechanically interlocked with a layer of polymer. We first validate the formation of mechanically interlocked nanotubes (MINTs) using mixtures of SWNTs of relatively large average diameter (1.6 ± 0.4 nm), which are commercially available at reasonable prices and therefore could be technologically relevant as polymer fillers. We then design and synthesize by ring-opening metathesis polymerization (ROMP) a polymer decorated with multiple U-shaped molecules, which are later ring-closed around the SWNTs using metathesis. The obtained hybrids contain a high degree of individualized SWNTs and exhibit significantly increased mechanical properties when compared to the matrix polymer. We envision that this strategy could be employed to produce SWNTs interlocked with polymer layers with various designs for polymer reinforcement.

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Resin impregnation and interfacial adhesion behaviors in carbon fiber/epoxy composites: Effects of polymer slip and normalized surface free energy with respect to the sizing agents

Cited by 20 publications

References 37 publications

Elastic modulus and Poisson’s ratio of graphene nanoplatelet/glass fiber-reinforced polymer hybrid composites subjected to off-axis loading

Elastic modulus and Poisson’s ratio of graphene nanoplatelet/glass fiber-reinforced polymer hybrid composites subjected to off-axis loading

Effect of Carbon Fiber Surface Microstructure on Composite Interfacial Property Based on Image Quantitative Characterization Technique

Interlocking Matrix and Filler for Enhanced Individualization and Reinforcement in Polymer–Single-Walled Carbon Nanotube Composites

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