The Reinforcement Ability of Plasma‐Etched Carbon Nanofibers on Mechanical Properties of C‐Epoxy Composites

Krushnamurty, K.; Reddy, Pappireddy Manoj Kumar; Srikanth, I.; Prasad, Pinnelli S. R.; Ghosal, Partha; Subrahmanyam, Ch.

doi:10.1002/ppap.201400014

Cited by 12 publications

(7 citation statements)

References 21 publications

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“…Among the various composites, glass fiber reinforced epoxy composites (Eglass-epoxy) are widely used in civilian applications like automobile bodies, strengthening of walls, slabs to new building frames and bridges and ship hulls. In defense applications glass-epoxy composites are used as armor tiles for protecting various vehicles [3][4][5]. There is a need to enhance mechanical and impact properties of glass epoxy composites as it will enable realizing light weight structures for both civilian and defense applications [6].…”

Section: Introductionmentioning

confidence: 99%

Effect Of Nanoclay On The Toughness Of Epoxy And Mechanical, Impact Properties Of E-glass-epoxy Composites

et al. 2015

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Organically modified montimorillonite nanoclay was added to the epoxy and E-glass-epoxy composites. The influence of nanoclay content (varied between 0 to 5wt %) on the relative crosslink density and the fracture toughness of the epoxy matrix was studied. Differential scanning calorimetry (DSC) indicated that the amino functional groups present on the nanoclay react with the epoxy matrix to increase the crosslink density of about 13 and 18% at 3 and 5wt% addition, respectively. The toughness of the epoxy composites increased by 25% at 3wt% addition of nanoclay, whereas, it decreases at 5wt%. Flexural strength and tensile strength of the E-glass-epoxy composites were found to increase by 12% and 11% respectively at 3wt% addition of nanoclay, while at 5wt% addition these properties decreased due to the matrix embrittlement. Interestingly matrix embrittlement is found to be beneficial in increasing the impact resistance due to spallation of embrittled matrix that ensures the dissipation of the impact energy. 5wt% nanoclay addition increases the impact strength by 29% and reduces the back face bulge of composite by 31%. These results may lead to the design and realization of glass-epoxy composites with better impact strength.design and realization of glass-epoxy composites with better impact strength.

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Section: Introductionmentioning

confidence: 99%

Effect Of Nanoclay On The Toughness Of Epoxy And Mechanical, Impact Properties Of E-glass-epoxy Composites

et al. 2015

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“…Plasma reactor used for the plasma functionalization of MWCNTs was explained elsewhere [8]. Plasma reactor used for the plasma functionalization of MWCNTs was explained elsewhere [8].…”

Section: Plasma Treatment Of Mwcnts: Plasma Functionalization Ofmentioning

confidence: 99%

“…Therefore a surface modification is necessary to overcome these drawbacks and improve the function of MWCNTs [5]. There is a considerable success in improving the interface compatibility of MWCNTs with polymers by using chemical functionalization methods [7][8][9]. There is a considerable success in improving the interface compatibility of MWCNTs with polymers by using chemical functionalization methods [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…6 There has been considerable success in improving the interface compatibility of MWCNTs with polymers by using chemical functionalization methods. [7][8][9] However, these chemical functionalization (HNO 3 treatment) methods would generate toxic substances, damage the essential nanotube structure and are generally too lengthy with possible problems of environmental pollution. 10 Only a few research groups have attempted alternate environmental friendly functionalization methods like ozone treatment and plasma treatment to generate active functional groups on MWCNTs surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Fast and clean functionalization of MWCNTs by DBD plasma and its influence on mechanical properties of C–epoxy composites

Krushnamurty

Srikanth²,

Rao

et al. 2015

RSC Adv.

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Multiwalled carbon nanotubes (MWCNTs) were functionalized under helium/air plasma and the surface characteristics were compared with that of chemical functionalization. Changes in surface functional groups of MWCNTs due to plasma/chemical treatment were estimated by using temperature programmed decomposition (TPD), elemental analysis, Raman spectroscopy and BET surface area analysis. Raman spectroscopic studies highlighted that chemical functionalization increases the degree of disorder for MWCNTs when compared to plasma treatment. TPD also confirmed that air plasma treatment leads to the highest number of acidic groups on the surface that decomposes to evolve carbon dioxide. The modified MWCNTs were used as additional reinforcements to fabricate carbon fiber reinforced plastics (CFRPs). It has been observed that air plasma treated MWCNTs improved the tensile and flexural strength of C-epoxy composites significantly as compared to conventional chemical functionalization, whereas the best performance of air plasma treated MWCNTs is due to higher acid functional groups on the surface, which improves interface compatibility between the MWCNTs to the epoxy matrix.

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“…There is a necessity to improve these properties of E-glass-epoxy composites, to make these more successful for different applications. Throughout the years, numerous analysts are investigating the likelihood of using different added substances such as nanoclay (NC), carbon nanofiber, carbon nanotubes and so on to upgrade the tensile, flexural characteristics and impact resistance of the E-glass-epoxy composites (Krushnamurty et al , 2014; Qi et al , 2006; Richardson et al , 2011; Xu and Hoa, 2008; Zhou et al , 2008). Among all these, amino-functionalized montmorillonite NC has a better compatibility with both E-glass and epoxy.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanoclay, glass fiber volume and orientation on tensile strength of epoxy-glass composite and optimization using Taguchi method

Zade

Babu

Srinadh

2018

WJE

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Purpose The purpose of this study is to manufacture test boards for re-enacting plant or field situations where vacuum chamber for expelling gas bubbles and autoclave equipment would not be accessible. This research focuses on the examination and enhancement of tensile strength for the nanocomposites consisting of uniaxial glass fiber mats, nanoclay (NC) and epoxy. Design/methodology/approach The parameters considered are the weight content of Cloisite 15A NC, the volume of glass fiber (Vgf) and the direction of glass fibers (θ). The composites are made by hand lay-up technique and tested according to ASTM D 638 standard. Taguchi L9 orthogonal array is used to design the experiments. Findings The results imply that the orientation of fibers exhibited high significance with a p-value of 0.001 for the upgrade of strength. NC percentage and the volume of fiber have a low effect as the p-values obtained were 0.375 and 0.294. Confirmation tests were performed at the optimal levels of parameters and the outcomes were in the permissible range of the anticipated values of S/N ratio and mean tensile strength. The negligible effect of nanoclay is due to the lack of infusion of resin into the d-spacing of clay layers due to the low configuration settings of mixing conditions which was confirmed by XRD studies. The negligible effect of glass fiber volume is due to the void content and lack of stress transfer between fibers uniformly due to the void content and improper mixing of nanoclay. Research limitations/implications The limitation of this study is that a low-speed mechanical stirrer was used to mix NC in the epoxy and the mixture was not subjected to vacuum and ultrasonication for degassing and deagglomeration. Practical implications These composites can be used as substitute materials in place of metallic parts in the aerospace and automobile sector. These composites can be used in civil structures instead of steel and concrete, which have low strength-to-weight ratio and where the requirement of strength is in the range of 60 to 390 MPa. Social implications The composites can be used in a variety of applications, for example, structural works, automotive panels and low-cost housing. Originality/value This research gives an idea about the combined contribution of NC, Vgf and “θ” to the improvement of tensile strength of the glass-epoxy composite.

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The Reinforcement Ability of Plasma‐Etched Carbon Nanofibers on Mechanical Properties of C‐Epoxy Composites

Cited by 12 publications

References 21 publications

Effect Of Nanoclay On The Toughness Of Epoxy And Mechanical, Impact Properties Of E-glass-epoxy Composites

Effect Of Nanoclay On The Toughness Of Epoxy And Mechanical, Impact Properties Of E-glass-epoxy Composites

Fast and clean functionalization of MWCNTs by DBD plasma and its influence on mechanical properties of C–epoxy composites

Effect of nanoclay, glass fiber volume and orientation on tensile strength of epoxy-glass composite and optimization using Taguchi method

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