Synthesis and Characterization of Carbon Fibers and their Application in Wood Composites

Khan, Tanveer Ahmed; Gupta, Arun; Madusari, Sylvia; Jose, Rajan; Mahmood, Nasir; Kumar, Anuj

doi:10.15376/biores.8.3.4171-4184

Cited by 20 publications

(16 citation statements)

References 16 publications

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“…During static test, the surface against the loading roller was subjected to compressive stress and the other surface was subjected to tensile stress, the addition of carbon fiber with excellent mechanical properties enhanced the compressive and tensile strength of CF-reinforced composite (He 2010). MOR for mixed boards had no obvious difference when the proportion of carbon fiber was increased from 10 wt.% to 40 wt.%, which is consistent with another research report (Khan et al 2013). However, the MOR decreased rapidly for a sample with 50 wt.% carbon fiber; the reason for this observation may be due to the agglomeration of carbon fibers within the composite matrix.…”

Section: Static Test Analysissupporting

confidence: 89%

Dynamic Analysis of Carbon Fiber-Reinforced Wood Composites Based on Finite Element Model

Zhang¹,

Liu²,

Sun³

2015

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Carbon fibers were pretreated by ultrasonic agitation and then were used to manufacture carbon fiber-reinforced wood composites (CFRWCs). The modulus of rupture (MOR) and the modulus of elasticity (MOE) for the CFRWCs were measured. The effects of the compounding pattern and proportion of carbon fiber on the dynamic performance were investigated by dynamic thermomechanical analysis (DMA) and finite element analysis (FEA). Finite element modeling was performed to simulate composite dynamic analysis using ANSYS commercial software. DMA results showed that the critical parameters for the mixed boards appeared to initially increase and then decrease as the content of carbon fiber increased. ANSYS simulations showed that the first-order natural frequency increased for single-sided and two-sided boards as the composite's carbon fiber content increased, whereas it initially increased and then decreased for mixed boards. In general, the mixed board with 20 wt.% carbon fiber had maximum dynamic performances. ANSYS simulation results were very close to those of the static test, which demonstrated that the finite element model was accurate.

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Section: Static Test Analysissupporting

confidence: 89%

Dynamic Analysis of Carbon Fiber-Reinforced Wood Composites Based on Finite Element Model

Zhang¹,

Liu²,

Sun³

2015

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“…Carbon fibers and carbon nanofibers, as the most important reinforcements, are widely employed in composites (He 2010). In addition, they have many features, such as high electrical conductivity (Bal 2010;Al-Saleh et al 2013;Chawla et al 2013), good mechanical properties (Al-Saleh and Sundararaj 2011), and low thermal expansivity (Chen and Ting 2002;Poveda et al 2012;Khan et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Multiscale Analysis on Electrical Properties of Carbon Fiber-Reinforced Wood Composites

Zhu¹,

Sun²

2015

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Carbon fiber was selected as a reinforcement for the manufacture of composite materials. Electrical properties of carbon fiber reinforced wood composites (CFRWCs) were studied by multiscale analysis, which is an all-rounded method to analyze CFRWCs from the macroscopic area to the microcosmic field. It was found that the insulated wood fiber materials could conduct electricity after adding a certain proportion of carbon fibers. The dielectric constants and the capacitances of CFRWCs increased gradually with increasing carbon fiber content in the composites from 55 wt.% to 75 wt.% when a certain condition prevails. However, the loss tangents and the surface resistivities of CFRWCs decreased as the carbon fiber content was increased continuously. The data of surface resistivity represented a negative growth situation with increasing temperature from 20 C to 120 C and exhibited a negative temperature coefficient (NTC) effect. The movement of electrons was also analyzed due to temperature rise.

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“…[3][4][5] At present, three precursors, polyacrylonitrile bers, pitch bers and viscose bers, can be employed to produce carbon bers in industry, where polyacrylonitrile bers are in a dominant position. However, polyacrylonitrile (PAN) homopolymer can't be used to prepare high strength carbon ber in industry, owing to its poor stabilization such as high initiation temperature and rapid heat release.…”

Section: 2mentioning

confidence: 99%

Poly(acrylonitrile-co-2-methylenesuccinamic acid) as a potential carbon fiber precursor: preparation and stabilization

et al. 2017

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A novel bifunctional comonomer 2-methylenesuccinamic acid (MLA) was synthesized to prepare poly(acrylonitrile-co-2-methylenesuccinamic acid) [P(AN-co-MLA)] copolymers, which can improve the stabilization of polyacrylonitrile significantly as a carbon fiber precursor. The structure and stabilization of P(AN-co-MLA) copolymers with different monomer feed ratios of AN/MLA were characterized by elemental analysis (EA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Reactivity ratio studies shows that MLA possesses higher reactivity than AN, resulting in higher MLA content in P(AN-co-MLA) copolymers than in the feed. The molecular weight and conversion of copolymer decrease gradually with the increase of MLA content in the feed. Comparing with PAN homopolymer, P(AN-co-MLA) copolymer has two or even three exothermic peaks, and the initial temperature of P(AN-co-MLA) copolymer is ca. 70 C lower than that of PAN, which broadens the exothermic peak. The DH/DT reduces from 34.01 J g À1 C À1 to less than 17.67 J g À1 C À1, confirming that the incorporation of MLA can avoid centralized heat release effectively.In addition, the extent of stabilization increases as the MLA content in P(AN-co-MLA) copolymer increases under the same heat treatment conditions. The activation energy (E a ) calculation shows cyclization E a of P(AN-co-MLA) reduces from ca. 168 kJ mol À1 to ca. 110 kJ mol À1, it is concluded that synthesized comonomer MLA can significantly improve stabilization of PAN, which is conducive to the preparation of high performance carbon fiber.

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Synthesis and Characterization of Carbon Fibers and their Application in Wood Composites

Cited by 20 publications

References 16 publications

Dynamic Analysis of Carbon Fiber-Reinforced Wood Composites Based on Finite Element Model

Dynamic Analysis of Carbon Fiber-Reinforced Wood Composites Based on Finite Element Model

Multiscale Analysis on Electrical Properties of Carbon Fiber-Reinforced Wood Composites

Poly(acrylonitrile-co-2-methylenesuccinamic acid) as a potential carbon fiber precursor: preparation and stabilization

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