Applicability of FT-IR Techniques and Goniometry on Characterization of Carbon Fiber Surfaces

Oliveira, Mauro Santos de; Diniz, Milton Faria; Dutra, Rita de Cássia Lazzarini; Massi, M.; Otani, C.

doi:10.5028/jatm.v8i1.537

Cited by 14 publications

(3 citation statements)

References 26 publications

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“…No prominent peaks were observed for the s-CF and d-CF, due to high concentration of carbon. 24 However, stretching vibration of C–H of methyl and methylene groups in the range of 2800–2980 cm −1 for s-CF, and C = C stretching vibration centred around 1668 cm −1 , were observed for the s-CF 25 and d-CF. The feeble peak at 3671 cm −1 and around 1020 cm −1 are attributed to the O-H groups on the surface due to ambient atmospheric moisture for both s-CF and d-CF.…”

Section: Resultsmentioning

confidence: 96%

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Interfacial shear strength of surface functionalized and functionalized CNT coated carbon fiber: A single fiber fragmentation study

Gogoi,

Shankar,

Rawat

et al. 2023

Journal of Thermoplastic Composite Materials

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The compatibility among nonpolar thermoplastics like polypropylene (PP) and carbon fibers (CF) having traditional sizing or coating is challenging. In this study, facile and effective surface functionalization of CF and its subsequent coating with functionalized carbon nanotubes (CNTs) were carried out to obtain improved interfacial shear strength (IFSS) which was validated by the single fiber fragmentation test (SFFT). Functional groups, -COOH, -OH, and -NH2, were separately grafted on the CF surface using different chemical routes. Additionally, ultrasonic assisted electrophoretic deposition (EPD) technique was used to coat -COOH, -OH, and -NH2 functionalized CNTs on the sized and surface functionalized CFs. Attenuated total reflection-infrared spectroscopy (ATR-IR), X-ray photoelectron spectroscopy (XPS), and field emission scanning electron microscopy (FE-SEM) images confirmed the successful surface functionalization and coating on CF. Neat PP and a blend of PP and maleic anhydride-grafted-styrene ethylene butylene styrene (MA-g-SEBS) were used as two different base polymer matrixes in preparing a total of 26 different SFFT samples. Silane functionalized CF coated with amine functionalized CNTs using ultrasonic assisted EPD process showed IFSS of ∼29 MPa which was an impressive ∼758% higher than pristine CF and highest among all the surface modified CFs. Interestingly, this translated into useful increase of ∼13% in single fiber tensile strength of functionalized and treated CF over and above that of as received CF.

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Section: Resultsmentioning

confidence: 96%

“…No prominent peaks were observed for the s-CF and d-CF, due to high concentration of carbon. 24 Figure 3. Preparation of SFFT sample represented by: (i) initially thin sheets of PP or its blend with MA-g-SEBS were prepared using a hot press.…”

Section: Atr-irmentioning

confidence: 99%

Interfacial shear strength of surface functionalized and functionalized CNT coated carbon fiber: A single fiber fragmentation study

Gogoi,

Shankar,

Rawat

et al. 2023

Journal of Thermoplastic Composite Materials

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“…Infrared Using Synchrotron Radiation. Infrared based synchrotron radiation provides an efficient technique to characterize chemical compounds crosswise surfaces to determine the sample's chemical composition [93,94]. Synchrotron radiation (SR) is the intense light produced by a synchrotron [95][96][97].…”

Section: Concept Of Infrared Spectroscopy-based Synchrotron Radiationmentioning

confidence: 99%

Worthwhile Relevance of Infrared Spectroscopy in Characterization of Samples and Concept of Infrared Spectroscopy-Based Synchrotron Radiation

Odularu

2020

Journal of Spectroscopy

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The study explores the nitty-gritty of infrared spectroscopy. Firstly, the review gives a concise history of infrared discovery and its location in the electromagnetic spectrum. Secondly, the infrared spectroscopy is reported for its mechanism, principles, sample preparation, and application for absence and presence of functional groups determination in both ligands and coordination compounds. Thirdly, it helps in purity determination of unknown samples. Additional studies regarding this study entail infrared spectroscopy-based synchrotron radiation. It serves as a giant microscope to give detailed information of samples under investigation compared to the conventional infrared instrument. Infrared will continue to be useful to both chemical and pharmaceutical industries, in order to make chemical products and manufactured drugs put on wholesome integrity.

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Method and experimental characterization of the surface free energy of carbon fibers used in composite systems

et al. 2021

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Surface treatments are known to affect the interfacial properties in composite systems, including some mechanical properties, as well as the ease of handling. In this study, a simple surface free energy (SFE) characterization technique is proposed to assess the effect of fiber surface treatments on the wetting behavior and SFE of carbon fibers. Several fiber surface treatments were applied.Commercially available T300 carbon fibers from a unidirectional tape were desized and then subjected to nitric acid oxidation as well as air plasma oxidation. Functionalization of the fiber surface was confirmed via X-ray photoelectron spectroscopy. Oxidation led to enhanced surface roughness as confirmed by measurements of the fibers' surface area using the Brunauer, Emmett, and Teller method. However, the wetting behavior of the fibers does not follow either the Wenzel or the Cassie-Baxter equations, possibly due to the dominant effect of the chemical interactions and the chemical heterogeneity of the fiber surface. It is shown that the polar component of the treated fibers' SFE increases while the dispersive component remains unaffected. The increase of

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Applicability of FT-IR Techniques and Goniometry on Characterization of Carbon Fiber Surfaces

Cited by 14 publications

References 26 publications

Interfacial shear strength of surface functionalized and functionalized CNT coated carbon fiber: A single fiber fragmentation study

Interfacial shear strength of surface functionalized and functionalized CNT coated carbon fiber: A single fiber fragmentation study

Worthwhile Relevance of Infrared Spectroscopy in Characterization of Samples and Concept of Infrared Spectroscopy-Based Synchrotron Radiation

Method and experimental characterization of the surface free energy of carbon fibers used in composite systems

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