Uniform modification of carbon fibers surface in 3-D fabrics using intermittent electrochemical treatment

Cao, Hailin; Huang, Yudong; Zhang, Zhiqian; Sun, Jvtao

doi:10.1016/j.compscitech.2005.02.018

Cited by 77 publications

(35 citation statements)

References 25 publications

(11 reference statements)

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“…To improve the wettability of carbon fibers and interfacial adhesion of composites, several techniques have been applied on carbon fibers for surface treatment, including plasma, [6,7] electrochemical oxidation, [8,9] wet chemical [10,11] and thermal treatment. [12 -14] These treatments on carbon fibers improved interfacial wetting and adhesion force of the final composites to some extent, but they had the drawbacks of high cost, high energy consumption, and significant loss in single-fiber strength.…”

Section: Introductionmentioning

confidence: 99%

The effect of surface modification with nitric acid on the mechanical and tribological properties of carbon fiber‐reinforced thermoplastic polyimide composite

2009

Surface & Interface Analysis

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Polyacrylamideacrylate (PAN)-based carbon fibers were submitted to nitric acid oxidation treatments to improve the interfacial adhesion of the carbon fiber (CF)-reinforced polyimide (CF/PI) composite. The carbon fiber surfaces were characterized by X-ray photoelectron spectroscopy (XPS). Nitric acid oxidation not only affects the oxygen concentration but also produces an appreciable change in the nature of the chemical functions, namely the conversion of hydroxy-type oxygen into carboxyl functions. Nitric acid oxidation treatment modifies the element constituting the fiber, the nitrogen concentration being about 1.2 times higher at the fiber external surface compared to the untreated one. The mechanical and tribological properties of the polymide (PI) composites reinforced by the carbon fibers treated with nitric acid oxidation were investigated. Results showed that the tensile strength of the CF/PI composites improved remarkably due to nitric acid treatment along with enhancement in friction and wear performance.

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Section: Introductionmentioning

confidence: 99%

The effect of surface modification with nitric acid on the mechanical and tribological properties of carbon fiber‐reinforced thermoplastic polyimide composite

2009

Surface & Interface Analysis

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“…The film thickness and functionality of the formed coating can control with electrochemical coating method using method parameters (current density, potential, monomer concentration, and temperature, etc. ) [28][29][30][31][32][33]. It is well known that while CF is obtained, it is sized with various adding (sizing) compounds.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Sizing Compound on the Electropolymerization of Pyrrole and the Impedance of Carbon Fiber Coated With Poly(pyrrole)

Dolaş¹,

Giray²,

Saraç³

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Carbon Fiber (CF) is used as a strengthening material in resin composites having high performance in most industrial areas due to the fact that it has mechanical properties such as low weight, high durability, and toughness. The mechanical performances of composite materials depend on the features of fiber and matrix which composed them. The one of methods which improves the features of fiber surface is the coating on fiber surface with thin film. When the fiber was coated with electropolymer, the mechanical durability of the composite was increased. In this study, carbon fibers were electrochemically coated with polypyrrole (PPy) in the presence of sizing compound (SC) based on epoxy. During the process, it was investigated that how current, obtained coating weights and impedance data, especially capacitance, changed by the amount of SC. For this reason, different amounts of SC (%0; % 0.18; %1.8 v/v) was added into the electrolyte solution (0.1 M NaClO4-ACN) including 0.1 M Pyrrole (Py). Coating process was carried out by using Constant Potential or Cyclic Voltammetry Techniques. Other techniques for investigations were gravimetrical analysis, electrochemical impedance spectroscopy, Fourier Transform Infrared Spectroscopy (FT-IR) and Light Microscopy. At the end of the coating, the weight of coating and specific capacitance (Csp) values were 0.8 mg/g and 114 µF for % 0 of SC 10 mg/g and 57 µF for %0.18 of SC and 1.73 mg/g and 166 µF for %1.8 of SC, respectively. As a result, the coating weight and capacitance data (especially, Csp,) of carbon fiber coated with PPy were inversely changed with the amount of SC added into electrolyte.

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“…A fuel cell is a power generation module that converts the chemical energy stored in the fuels and oxidants directly into power using a non-burning electrochemical reaction (Barbir 2005). Among the various fuel cells, the proton exchange membrane fuel cell (PEMFC) has been considered as an alternative power source for transport and stationary and portable fields (Barbir and Yazici 2008;Meidanshahi and Karimi 2012).…”

Section: Introductionmentioning

confidence: 99%

“…A gas diffusion layer (GDL) is embedded between the catalyst layer and the gas flow channel in a PEMFC, providing a channel for the transport of fuel and the transmission of current. The GDL mostly functions as (i) a gas diffuser, (ii) a current collector, and (iii) a physical support, thus determining the catalyst utilization and the overall performance (Mathias et al2003;Williams et al 2004;Barbir 2005). A GDL typically consists of a macroporous substrate.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Modiﬁcation and Dispersion of Short Carbon Fiber and the Properties of Composite Papers as Gas Diffusion Layer for Proton Exchange Membrane Fuel Cell (PEMFC)

Hu¹,

Liu²,

Lin³

et al. 2014

BioResources

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Short carbon fibers (SCF) were modified with oxidation and coupling treatment to improve their water-wettability and bonding properties. Four types of dispersants were studied and discussed. Short carbon fibers/plant fiber (PF) composite papers were prepared by papermaking techniques. Scanning electron microscopy (SEM) and tests to determine zeta potential, absorbance, tensile index, and conductivity were carried out to investigate the modified effect of SCF and the interfacial properties. Modification experimental results showed that the surface grooves were deepened and new superficial grooves were generated by the liquid acid oxidation. The reaction with the silane coupling agent provided higher density and more uniform distribution on the SCF surface than that of organic titanate, and it obviously increased the roughness and the absolute value of zeta potential. After modification, the hydrophilic properties and dispersion in aqueous solutions were improved, the SCFs could form a good mechanical grip with plant fibers, and the conductivity and physical strength of SCF/PF composite papers were enhanced. It was shown that there was obvious adhesive binding at the fiber overlap nodes by the SEM analysis. It was confirmed that the improvement of physical properties of composite paper can be ascribed to the interfacial enhancement.

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Uniform modification of carbon fibers surface in 3-D fabrics using intermittent electrochemical treatment

Cited by 77 publications

References 25 publications

The effect of surface modification with nitric acid on the mechanical and tribological properties of carbon fiber‐reinforced thermoplastic polyimide composite

The effect of surface modification with nitric acid on the mechanical and tribological properties of carbon fiber‐reinforced thermoplastic polyimide composite

The Effect of Sizing Compound on the Electropolymerization of Pyrrole and the Impedance of Carbon Fiber Coated With Poly(pyrrole)

Interfacial Modiﬁcation and Dispersion of Short Carbon Fiber and the Properties of Composite Papers as Gas Diffusion Layer for Proton Exchange Membrane Fuel Cell (PEMFC)

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