Multiwall carbon nanotube/epoxy composites produced by a masterbatch process

Wichmann, Malte H.G.; Sumfleth, Jan; Fiedler, Bodo; Gojny, Florian H.; Schulte, Karl

doi:10.1007/s11029-006-0050-3

Cited by 73 publications

(44 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Highly concentrated CNT/resin mixtures (masterbatches) are nowadays widely used both at laboratory and industrial scales to facilitate the processing of nanocomposite materials [26][27][28]. Although the increased viscosity of the CNT masterbatch can limit diffusion and sedimentation of CNTs by restricting the Brownian motions, reduced distances between the nanotubes at high loadings can give rise to the strong attractive forces, leading to further agglomeration of CNTs during sufficiently long storage periods.…”

Section: Results and Discussion 31 Masterbatch (Stage 1)mentioning

confidence: 99%

Evolution of carbon nanotube dispersion in preparation of epoxy-based composites: From a masterbatch to a nanocomposite

Aravand¹,

Lomov²,

Verpoest³

et al. 2014

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. The state of carbon nanotube (CNT) dispersion in epoxy is likely to change in the process of composite production. In the present work CNT dispersion is characterized at different stages of nanocomposite preparation: in the original masterbatch with high CNT concentration, after masterbatch dilution, in the process of curing and in the final nanocomposite. The evaluation techniques included dynamic rheological analysis of the liquid phases, optical, environmental and charge contrast scanning electron microscopy, electrochemical impedance spectroscopy and dynamic mechanical analysis. The evolution of the CNT dispersion was assessed for two CNT/epoxy systems with distinctly different dispersion states induced by different storage time. Strong interactions between CNT clusters were revealed in the masterbatch with a longer storage time. Upon curing CNT clusters in this material formed a network-like structure. This network enhanced the elastic behaviour and specific conductivity of the resulting nanocomposite, leading to a partial electrical percolation after curing.

show abstract

Section: Results and Discussion 31 Masterbatch (Stage 1)mentioning

confidence: 99%

Evolution of carbon nanotube dispersion in preparation of epoxy-based composites: From a masterbatch to a nanocomposite

Aravand¹,

Lomov²,

Verpoest³

et al. 2014

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…If a good state of dispersion is reached, the mechanical properties should benefit from a higher loading fraction. Furthermore, the electrical conductivity of the nanocomposites also increases with increasing CNT content 37 . Figure 4 shows the elastic modulus (G') as function of time for all formulations CNT-epoxy mixtures.…”

Section: Rheological Propertiesmentioning

confidence: 94%

“…CNT has been reported to improve the mechanical properties of nanostructured composites 16,37,42,43,59,60 . However, the reported weight or volume fractions were much higher (50-100 times) than the ones used in this study.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

“…Considering high aspect ratio and good dispersion, nanotubes can reach conductivity thresholds at lower loading levels and can create networks that facilitate the electron transport. In addition to the aspect ratio and the dispersion, several studies have shown that various processing parameters affect the properties of the resulting nanostructured composites 27,30,[35][36][37][38][39][40] . The processes of covalent and noncovalent functionalization have been suggested as one of the options for better dispersion of nanotubes 27,[41][42][43] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanostructured composites based on carbon nanotubes and epoxy resin for use as radar absorbing materials

et al. 2013

View full text Add to dashboard Cite

Nanostructured polymer composites have opened up new perspectives for multifunctional materials. In particular, carbon nanotubes (CNTs) present potential applications in order to improve mechanical and electrical performance in composites with aerospace application. The combination of epoxy resin with multiwalled carbon nanotubes results in a new functional material with enhanced electromagnetic properties. The objective of this work was the processing of radar absorbing materials based on formulations containing different quantities of carbon nanotubes in an epoxy resin matrix. To reach this objective the adequate concentration of CNTs in the resin matrix was determined. The processed structures were characterized by scanning electron microscopy, rheology, thermal and reflectivity in the frequency range of 8.2 to 12.4 GHz analyses. The microwave attenuation was up to 99.7%, using only 0.5% (w/w) of CNT, showing that these materials present advantages in performance associated with low additive concentrations.

show abstract

“…Lu [3] del to predict t ggested that th sensitive to siz modulus to be a, and the bulk used an atomic mechanical p sile strength an and 270-950 G ellent mechani meter ratio m inforcement. R sites has focuse ience and Eng [8][9][10][11][12].…”

Section: Introducmentioning

confidence: 99%

Enhancement of Elastic Modulus of Epoxy Resin with Carbon Nanotubes

Srivastava¹

2011

WJNSE

View full text Add to dashboard Cite

Multiwall carbon nanotube/epoxy composites produced by a masterbatch process

Cited by 73 publications

References 27 publications

Evolution of carbon nanotube dispersion in preparation of epoxy-based composites: From a masterbatch to a nanocomposite

Evolution of carbon nanotube dispersion in preparation of epoxy-based composites: From a masterbatch to a nanocomposite

Nanostructured composites based on carbon nanotubes and epoxy resin for use as radar absorbing materials

Enhancement of Elastic Modulus of Epoxy Resin with Carbon Nanotubes

Contact Info

Product

Resources

About