Thermal properties of multi-walled carbon nanotubes-graphite nanosheets/epoxy nanocomposites

Ramana, G. Venkata; Padya, Balaji; Srikanth, Vadali Venkata Satya Siva; Jain, Pradeep

doi:10.1063/1.4810058

Cited by 8 publications

(14 citation statements)

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“…The composite film was examined by FESEM to investigate the surface interaction and homogeneity of MWCNT in agarose‐chitosan (Agr‐Ch) matrix. A micrograph of Agr‐Ch‐MWCNT composite film (Figure A) showed uniform black dots on the surface indicating that the MWCNTs were completely adhered to the Agr‐Ch surface and were free of agglomeration . Furthermore, FESEM of the cross section of the film (Figure B) showed well‐blended of MWCNTs within the Agr‐Ch film suggesting good dispersion and adhesion of MWCNTs in the matrix and convincing toward the high active sites on the sorbent itself.…”

Section: Resultsmentioning

confidence: 98%

Solid‐phase microextraction based on an agarose‐chitosan‐multiwalled carbon nanotube composite film combined with HPLC–UV for the determination of nonsteroidal anti‐inflammatory drugs in aqueous samples

Ibrahim

Sanagi

Hanapi

et al. 2018

J of Separation Science

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We describe the preparation, characterization, and application of a composite film adsorbent based on blended agarose-chitosan-multiwalled carbon nanotubes for the preconcentration of selected nonsteroidal anti-inflammatory drugs in aqueous samples before determination by high performance liquid chromatography with ultraviolet detection. The composite film showed a high surface area (4.0258 m /g) and strong hydrogen bonding between the multiwalled carbon nanotubes and agarose/chitosan matrix, which prevent adsorbent deactivation and ensure long-term stability. Several parameters, such as sample pH, addition of salt, extraction time, desorption solvent, and concentration of multiwalled carbon nanotubes in the composite film were optimized using a one-factor-at-time approach. The optimum extraction conditions obtained were as follows: isopropanol as conditioning solvent, 10 mL of sample solution at pH 2, extraction time of 30 min, stirring speed of 600 rpm, 100 μL of isopropanol as desorption solvent, desorption time of 5 min under ultrasonication, and 0.4% w/v of composite film. Under the optimized conditions, the calibration curve showed good linearity in the range of 1-500 ng/mL (r = 0.997-0.999), and good limits of detection (0.89-8.05 ng/mL) were obtained with good relative standard deviations of < 4.59% (n = 3) for the determination of naproxen, diclofenac sodium salt, and mefenamic acid drugs.

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Section: Resultsmentioning

confidence: 98%

Solid‐phase microextraction based on an agarose‐chitosan‐multiwalled carbon nanotube composite film combined with HPLC–UV for the determination of nonsteroidal anti‐inflammatory drugs in aqueous samples

Ibrahim

Sanagi

Hanapi

et al. 2018

J of Separation Science

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“…Viscosity studies in the past reveal significant information on the increase in viscosity due to the reinforcement of nano fillers. 15 The percentage of nano filler in the epoxy matrix was limited to 1% by weight due to the increase in viscosity. Higher percentage of nano fillers caused agglomerations.…”

Section: Mfi Studiesmentioning

confidence: 99%

Influence of surface activated carbon nano fiber on thermo-mechanical properties of high performance polymeric nano composites

Ajeesh

Bhowmik

Venugopal

et al. 2016

Journal of Composite Materials

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This investigation highlights the influence of plasma modified carbon nano fiber (CNF) on the various properties of poly ether ketone (PEK). CNFs were modified with oxygen plasma under low pressure to enhance the interfacial adhesion between the reinforcement and matrix. Significant changes are evident in the elemental composition of oxygen and carbon on the plasma modified CNFs as observed by X-ray photo electron spectroscopy. Based on results from compression and tensile strength, significant change in the mechanical properties of the composites is observed. Dynamic mechanical thermal analysis (DMTA) reveals that the storage modulus increases on reinforcing modified CNF in PEK. The increase in modulus is noticeable only up to 1.5% wt reinforcement of CNF, while higher percentage of reinforcement leads to decline in properties. DMTA studies also clearly shows that the dispersion of CNF is not uniform after 1.5% of CNF reinforcement. However, differential scanning calorimeter and thermo gravimetric analysis studies reveal that the thermal properties of the CNF reinforced composite do not vary significantly. Thermal conductivity results show a substantial increase in the thermal conductivity of polymeric composites on increasing the reinforcements. Transmission electron microscopy (TEM) analysis reveals that there is uniform dispersion of CNF in PEK. TEM also clearly shows that higher percentage of CNF leads to agglomeration. Physico-chemical analysis indicates that the contact angle increases on increasing the reinforcements. These findings would be highly useful to make way for PEK composites for high temperature and high strength application.

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“…In order to examine the impact on the electrical conductivity the wider range of 0.0–5.0 wt.% was applied in [ 10 ]. As far as mechanical properties are concerned, lower concentrations were investigated: 0.0–1.0 wt.% in [ 58 ], 1.0 wt.% in [ 59 ], 0.1–0.9 wt.% in [ 15 ], 0.0–0.5 wt.% in [ 42 , 60 , 61 ] (and also in [ 62 ] but the paper also cites studies for 5.0 wt.%), 0.3 wt.% in [ 63 ] (for of carboxyl functionalized MWCNTs), 0.025–0.2 wt.% in [ 46 ] and 0.2 wt.% in [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of MWCNTs on Wear Behavior of Epoxy Resin for Aircraft Applications

Mucha¹,

Krzyżak²,

Kosicka

et al. 2020

Materials

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The aim of the study is to assess the effect of multi-walled carbon nanotubes (MWCNTs) on the wear behavior of MWCNT-doped epoxy resin. In this study, a laminating resin system designed to meet the standards for motor planes was modified with MWCNTs at mass fractions from 0.0 wt.% to 2.0 wt.%. The properties of the carbon nanotubes were determined in Raman spectroscopy and HR-TEM. An examination of wear behavior was conducted on a linear abraser with a visual inspection on an optical microscope and SEM imaging, mass loss measurement, and evaluation of the wear volume on a profilometer. Moreover, the mechanical properties of MWCNTs/epoxy nanocomposite were evaluated through a tensile test and Shore D hardness test. The study shows that the best wear resistance is achieved for the mass percentage between 0.25 wt.% and 0.5 wt.%. For the same range, the tensile strength reaches the highest values and the hardness the lowest values. Together with surface imaging and a topography analysis, this allowed describing the wear behavior in the friction node and the importance of the properties of the epoxy nanocomposite.

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Thermal properties of multi-walled carbon nanotubes-graphite nanosheets/epoxy nanocomposites

Cited by 8 publications

References 0 publications

Solid‐phase microextraction based on an agarose‐chitosan‐multiwalled carbon nanotube composite film combined with HPLC–UV for the determination of nonsteroidal anti‐inflammatory drugs in aqueous samples

Solid‐phase microextraction based on an agarose‐chitosan‐multiwalled carbon nanotube composite film combined with HPLC–UV for the determination of nonsteroidal anti‐inflammatory drugs in aqueous samples

Influence of surface activated carbon nano fiber on thermo-mechanical properties of high performance polymeric nano composites

Effect of MWCNTs on Wear Behavior of Epoxy Resin for Aircraft Applications

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