Effect of functionalization on the thermo-mechanical and electrical behavior of multi-wall carbon nanotube/epoxy composites

Guadagno, Liberata; Vivo, Biagio De; Bartolomeo, Antonio Di; Lamberti, Patrizia; Sorrentino, Andrea; Tucci, Vincenzo; Vertuccio, Luigi; Vittoria, Vittoria

doi:10.1016/j.carbon.2011.01.017

Cited by 240 publications

(173 citation statements)

References 35 publications

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“…Allaoui and El Bouina [36], have summarized some of the available results in a review paper. Most of the reported results suggest an increase or almost no change in the T g values [16,19,[37][38][39][40][41] while some reductions have also been reported [42,43]. Such inconsistent results are attributed to a complex simultaneous influence of various parameters such as aspect ratio, functionality, packing density and purity (presence of metallic catalysts) of the nanotubes.…”

Section: Solid (Cured) Nanocomposite (Stage 4)mentioning

confidence: 96%

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.

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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.

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Section: Solid (Cured) Nanocomposite (Stage 4)mentioning

confidence: 96%

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.

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“…25 Guadagno et al studied the COOH functionalized MWCNT reinforced epoxy composites using DMA and reported a constant value or decrement in storage modulus. 26 Amr et al studied the acid functionalized MWCNT reinforced polystyrene composite using DSC and reported that acid functionalized MWCNT act as a plasticizer.…”

mentioning

confidence: 99%

Depression in glass transition temperature of multiwalled carbon nanotubes reinforced polycarbonate composites: effect of functionalization

et al. 2015

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Functionalized multiwalled carbon nanotubes (a-MWCNTs) and non-functionalized MWCNTs were melt mixed with polycarbonate polymer by utilizing twin screw micro compounder having a back flow channel to obtain nanocomposites with varying composition from 0.5 to 10 wt% MWCNT and 2 wt% a-MWCNT. Mechanical properties of composite samples were studied using dynamic mechanical analyzer, flexural and tensile tests. Both DMA and flexural and tensile tests suggest formation of continuous network of CNT-polymer that is supported by measured storage modulus for different loading of MWCNT and a-MWCNT. The composite sample showed lower glass transition temperature (T g ) as compared to pure PC. Effect of functionalization of MWCNTs on T g of its of polycarbonate composites is studied and showed higher T g depression in functionalized MWCNTs compared to non functionalized MWCNTs based composites over pure polycarbonate. In DMA, lowering of height of tan delta peak indicates that polymer in composite material participating in T g was reduced along with loading of MWCNT, consistent with immobilization of polymer material present at the CNT interface.Effect of functionalization on morphology was investigated using scanning electron microscope and confirms the better interaction in case of a-MWCNTs compare to MWCNTs based composites. Further, Raman spectroscopic analysis indicates higher interaction between a-MWCNT and PC matrix as compared to as synthesized MWCNT.

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“…SEM reveals the presence of stress concentration in the matrix of fractured epoxy due to agglomeration of MWCNTs. With increasing concentration of MWCNTs, modification of the roughness of the fractured surface was observed mainly in the areas of the CECs where the crack propagation initiated, which is common in brittle epoxy resin fractures [31,35,36]. The spectral, microstructure, and electrical conductivity data reveal the capability of SCC to provide well dispersed MWCNT/epoxy formulations up to a filler concentration of 0.2 at applied supercritical processing conditions within 1h without sonication [18,29,31].…”

Section: Resultsmentioning

confidence: 97%

Modifications of mechanical, thermal, and electrical characteristics of epoxy through dispersion of multi-walled carbon nanotubes in supercritical carbon dioxide

Zaidi¹,

Joshi²,

Kumar³

et al. 2013

Carbon letters

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A supercritical carbon dioxide (SCC) process of dispersion of multi-walled carbon nanotubes (MWCNTs) into epoxy resin has been developed to achieve MWCNT/epoxy composites (CECs) with improved mechanical, thermal, and electrical properties. The synthesis of CECs has been executed at a MWCNT (phr) concentration ranging from 0.1 to 0.3 into epoxy resin (0.1 mol) at 1800 psi, 90°C, and 1500 rpm over 1 h followed by curing of the MWCNT/epoxy formulations with triethylene tetramine (15 phr). The effect of SCC treatment on the qualitative dispersion of MWCNTs at various concentrations into the epoxy has been investigated through spectra analyses and microscopy. The developed SCC assisted process provides a good dispersion of MWCNTs into the epoxy up to a MWCNT concentration of 0.2. The effects of SCC assisted dispersion at various concentrations of MWCNTs on modification of mechanical, thermal, dynamic mechanical thermal, and tribological properties and the electrical conductivity of CECs have been investigated.

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Effect of functionalization on the thermo-mechanical and electrical behavior of multi-wall carbon nanotube/epoxy composites

Cited by 240 publications

References 35 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

Depression in glass transition temperature of multiwalled carbon nanotubes reinforced polycarbonate composites: effect of functionalization

Modifications of mechanical, thermal, and electrical characteristics of epoxy through dispersion of multi-walled carbon nanotubes in supercritical carbon dioxide

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