Synergistic effect of carbon fabric and multiwalled carbon nanotubes on the fracture, wear and dynamic load response of epoxy-based multiscale composites

Kumar, Pradip; Jayanarayanan, Karingamanna; Deeraj, B.D.S.; Joseph, Kuruvilla; Balachandran, Meera

doi:10.1007/s00289-021-03742-6

Cited by 16 publications

(21 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crystallization behavior of base polymer will be changed due to the incorporation of conducting nanofillers 7 . The incorporation of nanofillers into the polymer matrix also improves mechanical properties of the composites 8–11 …”

Section: Introductionmentioning

confidence: 99%

Polyvinylidene fluoride‐natural graphite flexible composite films: Formation of graphite nanosheets, electroactive phase, analysis of electrical and thermal properties

Ayyappan

Menon

Sabu

et al. 2022

Polymers for Advanced Techs

View full text Add to dashboard Cite

Solution blending technique has been employed to synthesize polyvinylidene fluoride (PVDF)‐natural graphite composite films. The surface tension of the solvent has been observed to play an important role in the reduction of graphite particle size and their dispersion in the polymer matrix as N‐N‐dimethylacetamide (DMAc) employed PVDF‐x wt% natural graphite (x = 3, 5) films exhibit higher conductivity than that of N‐N‐dimethylformamide (DMF) employed films of same composition. The dispersion of probe sonicated graphite particles in PVDF matrix has been observed to be better when DMAc solvent is used in comparison to DMF employed composite as revealed by optical microscope images. The electrical percolation threshold in PVDF‐natural graphite composites is identified below 0.5 wt% natural graphite due to remarkable reduction in the particle size of graphite which improved the network formation between them. FESEM analysis confirms the formation of graphite nanosheets. The coexistence of non‐polar α and electroactive γ phases of PVDF in the composites is confirmed by FTIR, XRD, and DSC analyses. Maximum fraction of γ phase, as calculated from FTIR, is 88% in PVDF‐3 wt% natural graphite composite. Thermal annealing of PVDF‐3 wt% natural graphite at 120°C for 5 h results in enhanced electroactive γ phase in the nanocomposite. The onset degradation temperature of PVDF is increased by 4°C in PVDF‐5 wt% natural graphite suggesting enhanced thermal stability of the composite. Room temperature I–V characteristics of PVDF‐x wt% natural graphite (x = 5, 7) composite supports space charge limited conduction to be the dominant mechanism of charge transport.

show abstract

Section: Introductionmentioning

confidence: 99%

Polyvinylidene fluoride‐natural graphite flexible composite films: Formation of graphite nanosheets, electroactive phase, analysis of electrical and thermal properties

Ayyappan

Menon

Sabu

et al. 2022

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…A schematic representation of single end notch bending test (SENB) is shown in Figure 4. Equations to calculate K IC equation 3 and G IC equation 4 are given below 33

K_{normalIC} = \begin{array}{l} \frac{4 P}{B} goodbreak\times \sqrt{\frac{normalπ}{W}} [1.6 {(\frac{a}{W})}^{\frac{1}{2}} - 2.6 {(\frac{a}{W})}^{\frac{3}{2}} \\ + 12.3 {(\frac{a}{W})}^{\frac{5}{2}} - 21.2 {(\frac{a}{W})}^{\frac{7}{2}} + 21 {(\frac{a}{W})}^{\frac{9}{2}}] \end{array}

G_{IC} = \frac{{K_{IC}}^{2}}{E}

where P is load (kN), W is thickness of the sample, a is the depth of the notch, B is the breadth of the sample, and E is the Young's modulus.…”

Section: Resultsmentioning

confidence: 99%

“…They undergo elastic deformation while shearing due to bridging effect of MWCNTs offering resistance to particle chipping. 33 Abrasive wear does not form effective transfer films leading to plowing of the specimen surface. Plowing or tire marks exposes the inner layers of the sample without protective layers on the counterface leading to erosion of the sample.…”

Section: Wear Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Synergistic behavior of dual filler system (n‐Si₃N₄/COOH‐MWCNT) on the mechanical, tribological, curing, and corrosion characteristics of epoxy hybrid nanocomposites

Bhagavatula

Painkal

Rasana

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Epoxy hybrid nanocomposites reinforced with silicon nitride nanoparticles (SiN) and carboxylic acid‐modified multiwalled carbon nanotubes (COOH‐MWCNT) were prepared by hand layup. These hybrid nanocomposites have not undergone thorough investigation in the fields of mechanical, tribological, and corrosion‐resistant characteristics. The 0.25/0.5 SiN/MWCNT hybrid nanocomposite displayed improvement in elongation by 190% and fracture toughness by 360%. The effect of dual filler system on the wear and friction properties of the composite was investigated. The influence of silicon nitride and hybrid fillers the curing characteristics of epoxy was examined using Fourier transform infrared spectroscopy (FTIR). From differential scanning calorimetry (DSC), it was found that the use of dual fillers in the epoxy system reduced the residual heat of reaction and curing time by 15%. In a highly corrosive environment (3.5% NaCl), TAFEL polarization showed that 0.5/0.5 SiN/MWCNT epoxy hybrid coating on mild steel (MS) increased protection against corrosion by 30%. The dispersion of nanofillers and their interactions were verified using high‐resolution transmission electron microscopy (HR‐TEM). The morphology of the fracture, wear, and corroded surfaces were examined by field emission scanning electron microscopy (FE‐SEM). SiN manifested a synergistic effect with MWCNTs making it a superior reinforcement at very low content.

show abstract

“…Conducting carbon nanostructures are being focused on in this regard. Carbon nanostructures in binary or hybrid polymer composites can affect crystallization behavior 19 and mechanical properties 20–22 …”

Section: Introductionmentioning

confidence: 99%

Polyvinylidene fluoride‐poly(vinyl acetate)‐natural graphite blend nanocomposites: Investigations of electroactive phase formation, electrical, thermal, and wetting properties

Menon

Sabu

Ramanujam

2022

Polymers for Advanced Techs

View full text Add to dashboard Cite

Solution blended polyvinylidene fluoride (PVDF)‐20 wt% poly(vinyl acetate) (PVAc)‐natural graphite (NtGr) blend nanocomposites exhibit a very low electrical percolation threshold of less than 0.5 wt% NtGr due to the formation of graphite nanosheets. The electroactive gamma phase induced with and without NtGr in PVDF‐20 wt% PVAc blend film is confirmed by X‐ray diffraction, fourier transform infrared spectroscopy, and differential scanning calorimetry analyzes. The onset degradation temperature corresponding to PVDF in PVDF‐20 wt% PVAc blend nanocomposites is increased by 27°C when 1 wt% NtGr is incorporated into the blend, suggesting enhanced thermal stability of blend nanocomposites. Due to an increase in surface roughness of PVDF‐20 wt% PVAc‐3 wt% NtGr as evidence by field emission scanning electron microscopy analysis, the water contact angle increases to 141.6° from 83.44° for PVDF‐20 wt% PVAc blend. AC conductivity analysis suggests hopping conduction in PVDF‐20 wt% PVAc‐x wt% NtGr (x = 1, 3, 5) blend nanocomposites. The interjunction capacitance increases with graphite loading in the blend.

show abstract

Synergistic effect of carbon fabric and multiwalled carbon nanotubes on the fracture, wear and dynamic load response of epoxy-based multiscale composites

Cited by 16 publications

References 61 publications

Polyvinylidene fluoride‐natural graphite flexible composite films: Formation of graphite nanosheets, electroactive phase, analysis of electrical and thermal properties

Polyvinylidene fluoride‐natural graphite flexible composite films: Formation of graphite nanosheets, electroactive phase, analysis of electrical and thermal properties

Synergistic behavior of dual filler system (n‐Si₃N₄/COOH‐MWCNT) on the mechanical, tribological, curing, and corrosion characteristics of epoxy hybrid nanocomposites

Polyvinylidene fluoride‐poly(vinyl acetate)‐natural graphite blend nanocomposites: Investigations of electroactive phase formation, electrical, thermal, and wetting properties

Contact Info

Product

Resources

About

Synergistic effect of carbon fabric and multiwalled carbon nanotubes on the fracture, wear and dynamic load response of epoxy-based multiscale composites

Cited by 16 publications

References 61 publications

Polyvinylidene fluoride‐natural graphite flexible composite films: Formation of graphite nanosheets, electroactive phase, analysis of electrical and thermal properties

Polyvinylidene fluoride‐natural graphite flexible composite films: Formation of graphite nanosheets, electroactive phase, analysis of electrical and thermal properties

Synergistic behavior of dual filler system (n‐Si3N4/COOH‐MWCNT) on the mechanical, tribological, curing, and corrosion characteristics of epoxy hybrid nanocomposites

Polyvinylidene fluoride‐poly(vinyl acetate)‐natural graphite blend nanocomposites: Investigations of electroactive phase formation, electrical, thermal, and wetting properties

Contact Info

Product

Resources

About

Synergistic behavior of dual filler system (n‐Si₃N₄/COOH‐MWCNT) on the mechanical, tribological, curing, and corrosion characteristics of epoxy hybrid nanocomposites