Effect of Functional Groups on Interfacial Adhesion Properties of PEEK/Carbon Fiber Composites

2014 ◽  
Vol 598 ◽  
pp. 66-72 ◽  
Author(s):  
Umut Yapıcı ◽  
Lei Pan ◽  
Fei Xu ◽  
Jia Meng Cao
Keyword(s):  
Carbon Fiber ◽  
Functional Groups ◽  
Photoelectron Spectroscopy ◽  
Interfacial Properties ◽  
Chemical Compositions ◽  
Carbon Fiber Composites ◽  
Adhesion Properties ◽  
Piranha Solution ◽  
Chemical Solutions ◽  
Interlaminar Shear

In our work, we aimed to improve the interfacial properties of the Polyetheretherketone (PEEK) polymer/carbon fiber (CF) by treating the fibers with wet chemical method, a higly oxidative chemical solutions called piranha solution and chromate solution. The changes of the surface funtional groups, chemical compositions and structures of the carbon fibers were characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR),surface morphology was studied by scanning electron microscopy (SEM), mechanical interfacial properties of the composites was evaluated by means of interlaminar shear strength (ILSS) tests. The results indicated that graphitic carbon was the major carbon functional component on the carbon fiber surfaces and other functional groups were also presented, such as C–O, C-OH, C = O. Consequently, these introductions of oxygen functional groups onto the carbon fiber surfaces led to an improvement of the ILSS of the composites.

Effects of Different Sizing Agents on the Interfacial Properties of Carbon Fibers

2015 ◽  
Vol 813 ◽  
pp. 202-209
Author(s):  
Qing Bo Zhang ◽  
Kai Qiang Sui ◽  
Li Liu ◽  
Da Wei Jiang ◽  
Guang Shun Wu ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Photoelectron Spectroscopy ◽  
Surface Characteristic ◽  
Surface Functional Group ◽  
Carbon Fiber Composites ◽  
Force Microscopy ◽  
Atomic Force ◽  
Interlaminar Shear ◽  
Sizing Agents

In this work, carbon fibers were sized with three different sizing agents in order to improve the performances of carbon fibers and the interface of carbon fibers composites. The surface characteristic was investigated by scanning electron microscopy (SEM), atomic force microscopy (AFM), at the same time, the single fiber strengths and weibull distributions were also studied in order to understand the effect of different sizing agents on carbon fibers. The interlaminar shear strength (ILSS) of the composites was also measured to study the effect of fiber coatings on the interface of the composites. X-ray photoelectron spectroscopy (XPS) was also used to analyze the element composition of carbon fiber modified by different sizing agents. This investigation shows that different sizing agents could give a different composition of surface functional group for carbon fiber, which is crucial to the interfacial performance of carbon fiber composites.

Improvement of Interfacial Adhesion in PP/PS Blends Enhanced with Polyethylene-Polyamine Surface Treated Carbon Fiber

2014 ◽  
Vol 1061-1062 ◽  
pp. 170-174
Author(s):  
Jian Li
Keyword(s):  
Contact Angle ◽  
Carbon Fiber ◽  
Photoelectron Spectroscopy ◽  
Interfacial Adhesion ◽  
Morphological Changes ◽  
Water Contact ◽  
Polyethylene Polyamine ◽  
Adhesion Behavior ◽  
Interlaminar Shear ◽  
Treated Carbon

The effects of surface treatment of a carbon fiber (CF) by Polyethylene-polyamine (PEPA) on the interfacial adhesion behavior and morphology of polypropylene/polystyrene (PP/PS) matrix blends filled CF composites were investigated. Effects of surface treated a commercial CF on mechanical properties are studied. Contact angle was measured to examine the changes in wettability of the carbon fiber. The chemical and morphological changes were characterized by using X-ray photoelectron spectroscopy (XPS). PP/PS/CF composites were fabricated with and without PEPA treatment, and their interlaminar fracture toughnesses were compared. The results showed that the interlaminar shear strength (ILSS) of composites has been greatly improved filled PEPA modification CF. The water contact angle of resin sample decreased 50% after addition of PEPA surface treated CF.

Surface and Composite Interface of Carbon Fiber Modified by Grafting of Diethanolamine

2009 ◽  
Vol 79-82 ◽  
pp. 497-500 ◽  
Author(s):  
Lei Chen ◽  
Zhi Wei Xu ◽  
Jia Lu Li ◽  
Xiao Qing Wu ◽  
Li Chen
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Functional Groups ◽  
Carbon Fibers ◽  
Irradiation Dose ◽  
Interlaminar Shear Strength ◽  
Epoxy Composites ◽  
Composite Interface ◽  
Γ Ray ◽  
Interlaminar Shear

The γ-ray co-irradiation method was employed to study the effect of diethanolamine modification on the surface of carbon fiber (CF) and the interfacial properties of CF/epoxy composites. Compared with the original carbon fiber, the surface of modified fibers became rougher. The amount of oxygen-containing functional groups was increased and the nitrogen element was detected after irradiation grafting. The interlaminar shear strength (ILSS) of composites reinforced by carbon fibers irradiated in diethanolamine solution was increased and then decreased as the irradiation dose increased. The ILSS of CF/epoxy composites was enhanced by 16.1% at 200kGy dose, compared with that of untreated one. The γ-ray irradiation grafting is expected to be a promising method for the industrialized modification of carbon fibers.

scholarly journals Effect of Graphene Additive on Flexural and Interlaminar Shear Strength Properties of Carbon Fiber-Reinforced Polymer Composite

2020 ◽  
Vol 4 (4) ◽  
pp. 162
Author(s):  
Mohamed Ali Charfi ◽  
Ronan Mathieu ◽  
Jean-François Chatelain ◽  
Claudiane Ouellet-Plamondon ◽  
Gilbert Lebrun
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Interlaminar Shear Strength ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Adhesion Properties ◽  
Reinforced Polymer ◽  
Interlaminar Shear

Composite materials are widely used in various manufacturing fields from aeronautic and aerospace industries to the automotive industry. This is due to their outstanding mechanical properties with respect to their light weight. However, some studies showed that the major flaws of these materials are located at the fiber/matrix interface. Therefore, enhancing matrix adhesion properties could significantly improve the overall material characteristics. This study aims to analyze the effect of graphene particles on the adhesion properties of carbon fiber-reinforced polymer (CFRP) through interlaminar shear strength (ILSS) and flexural testing. Seven modified epoxy resins were prepared with different graphene contents. The CFRP laminates were next manufactured using a method that guarantees a repeatable and consistent fiber volume fraction with a low porosity level. Short beam shear and flexural tests were performed to compare the effect of graphene on the mechanical properties of the different laminates. It was found that 0.25 wt.% of graphene filler enhanced the flexural strength by 5%, whilst the higher concentrations (2 and 3 wt.%) decreased the flexural strength by about 7%. Regarding the ILSS, samples with low concentrations (0.25 and 0.5 wt.%) demonstrated a decent increase. Meanwhile, 3 wt.% slightly decreases the ILSS.

Enhanced interfacial properties of carbon fiber composites via aryl diazonium reaction “on water”

2014 ◽  
Vol 316 ◽  
pp. 366-372 ◽  
Author(s):  
Yuwei Wang ◽  
Linghui Meng ◽  
Liquan Fan ◽  
Lichun Ma ◽  
Meiwei Qi ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Interfacial Properties ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Diazonium Reaction

Improving the interfacial properties of carbon fibers/vinyl ester composites by vinyl functionalization on the carbon fiber surface

RSC Advances ◽  
2016 ◽  
Vol 6 (35) ◽  
pp. 29428-29436 ◽  
Author(s):  
Xiuping Zhang ◽  
Liu Liu ◽  
Ming Li ◽  
Yanjie Chang ◽  
Lei Shang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Vinyl Ester ◽  
Interfacial Adhesion ◽  
Fiber Surface ◽  
Interfacial Properties ◽  
Resin Composites ◽  
Vinyl Ester Resin ◽  
Adhesion Properties ◽  
Carbon Fiber Surface

APMA functionalized CFs can significantly improve the interfacial adhesion properties of the carbon fiber reinforced vinyl ester resin composites.

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