Effect of silane treatment of carboxylic-functionalized multi-walled carbon nanotubes on the thermal properties of epoxy nanocomposites

Zhou, Ting; Wang, X.; Liu, X. H.; Lai, Jinmei

doi:10.3144/expresspolymlett.2010.28

Cited by 35 publications

(22 citation statements)

References 25 publications

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“…DSC is often used to study the effect of nanofillers on the cure behaviors of epoxy resin [11,16,[25][26][27]. In present work, dynamic kinetic studies based on Kissinger and Flynn-Wall-Ozawa (FWO) models [26][27][28] were utilized to investigate the DGEBA/ CTBN/MWCNT-COOHs nanocomposites.…”

Section: Cure Behaviorsmentioning

confidence: 99%

Carboxyl-terminated butadiene-acrylonitrile-toughened epoxy/carboxyl-modified carbon nanotube nanocomposites: Thermal and mechanical properties

Wang¹,

Wang²,

Yin³

et al. 2012

Express Polym. Lett.

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Section: Cure Behaviorsmentioning

confidence: 99%

Carboxyl-terminated butadiene-acrylonitrile-toughened epoxy/carboxyl-modified carbon nanotube nanocomposites: Thermal and mechanical properties

Wang¹,

Wang²,

Yin³

et al. 2012

Express Polym. Lett.

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“…Before stored in desiccators, COOH-MWCNTs were dried at 110°C for 24 h in vacuum to eliminate the agglomeration caused by hygroscopic absorption, as well as removing planar water, which would hinder the interaction between coupling agent and COOH-MWCNTs. Micrographs of the rod-shaped COOH-MWCNTs and the COOH-MWCNT/epoxy composite can be seen in our previous work [31]. The starting material for GNPs was graphite intercalation compound (GIC) particles (500 µm), i.e.…”

Section: Experimental 21 Materialsmentioning

confidence: 99%

Improving the thermal conductivity of epoxy resin by the addition of a mixture of graphite nanoplatelets and silicon carbide microparticles

Zhou¹,

Cheng²,

Wang³

et al. 2013

Express Polym. Lett.

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111

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Graphene nanosheet (GNS), a single layer of hexagonally arrayed sp 2 -bonded carbon, has attracted increasing attention recently due to its excellent thermal, electrical and mechanical properties. However, manufacturing GNS-filled composites has been very challenging due to the difficulties in large-scale production of GNSs and their dispersion in matrices. GNSs tend to form irreversible agglomerates or even restack to form graphite through van der Waals interactions during the processing of bulk-quantity GNSs, especially in the drying process [1]. Carbon nanotube (CNT), another type of widely studied and applied high-performance carbon-based nanofiller, also has great challenges in composite applications especially due to its expensive production cost. Instead of trying to discover easier large-scale processes for GNSs or lower cost processes for CNTs, an alternative type of carbon-based nanofiller with comparable properties, which can be produced more easily and cost-effectively in large quantities, has also recently been emphasized. Abstract. In this work, an alternative type of carbon-based nanofiller, graphite nanoplatelets (GNPs) with comparable properties, easier and lower-cost production, were used to improve the thermal conductivity of an epoxy. By adding 12 wt% GNPs or 71.7 wt% silicon carbide microparticles (micro-SiCs) to epoxy, the thermal conductivity reached maxima that were respectively 6.3 and 20.7 times that of the epoxy alone. To further improve the thermal conductivity a mixture of the two fillers was utilized. The utilized GNPs are characterized by two-dimensional (2-D) structure with high aspect ratio (~447), which enables GNPs effectively act as heat conductive bridges among 3-D micro-SiCs, thus contributes considerably to the formation of a more efficient 3-D percolating network for heat flow, resulting in higher thermal conductivity with relatively lower filler contents which is important for decreasing the density, viscosity and improving the processability of composites. A thermal conductivity, 26.1 times that of epoxy, was obtained with 7 wt% GNPs + 53 wt% micro-SiCs, thus not only break the bottleneck of further improving the thermal conductivity of epoxy composites but also broaden the applications of GNPs.

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“…They reported that MWCNTs had an accelerating effect in the initial curing stage, whereas in the later curing stage, MWCNTs prevented from the occurrence of vitrification [20]. However, carboxylic functionalization of MWCNTs did not change the autocatalytic cure reaction mechanism of epoxy nanocomposites and had catalytic effect on the curing process [21,22]. Jana and Zhong [23] found that expanded graphite (EG) did not significantly impede the cure reaction of epoxy.…”

mentioning

confidence: 99%

“…Differential scanning calorimetry (DSC) may be considered as one of the most interesting techniques for kinetic analysis of cure reactions of thermosetting systems [13][14][15]. Numerous studies on cure kinetics of epoxy in presence of carbon-based nanofillers have been investigated [16][17][18][19][20][21][22][23][24][25]. Recently, Allaoui and El Bounia [16] had reviewed the influence of CNTs on the cure kinetics of epoxy resin.…”

mentioning

confidence: 99%

“…Abdalla et al [19] investigated the effect of carboxyl and fluorine surface modification of multiwalled carbon nanotubes (MWCNTs) on the cure behavior of epoxy resins with the modified CNTs, and reported that the activation energy and rate constant were not affected by the fluorine modification whereas the resins with carboxylated MWCNTs exhibited an increase in the activation energy and a lower rate constant for the cure reaction. Zhou et al [20][21][22] studied the effects of MWCNTs and carboxylic functionalization of MWCNTs on the cure reaction of epoxy. They reported that MWCNTs had an accelerating effect in the initial curing stage, whereas in the later curing stage, MWCNTs prevented from the occurrence of vitrification [20].…”

mentioning

confidence: 99%

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Effects of graphene oxides on the cure behaviors of a tetrafunctional epoxy resin

Qiu¹,

Wang²,

Wang³

et al. 2011

Express Polym. Lett.

137

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The influence of graphene oxides (GOs) on the cure behavior and thermal stability of a tetrafunctional tetraglycidyl-4,4’-diaminodiphenylmethane cured with 4,4’-diaminodiphenylsulfone was investigated by using dynamic differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The dynamic DSC results showed that the initial reaction temperature and exothermal peak temperature decreased with the increase of GO contents. Furthermore, the addition of GO increased the enthalpy of epoxy cure reaction. Results from activation energy method showed that activation energies of GO/epoxy nanocomposites greatly decreased with the GO content in the latter stage, indicating that GOs significantly hindered the occurrence of vitrification. The oxygen functionalities, such as hydroxyl and carboxyl groups, on the surface of GOs acted as catalysts and facilitated the curing reaction and the catalytic effect increased with the GO contents. TGA results revealed that the addition of GOs decreased the thermal stability of epoxy

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Effect of silane treatment of carboxylic-functionalized multi-walled carbon nanotubes on the thermal properties of epoxy nanocomposites

Cited by 35 publications

References 25 publications

Carboxyl-terminated butadiene-acrylonitrile-toughened epoxy/carboxyl-modified carbon nanotube nanocomposites: Thermal and mechanical properties

Carboxyl-terminated butadiene-acrylonitrile-toughened epoxy/carboxyl-modified carbon nanotube nanocomposites: Thermal and mechanical properties

Improving the thermal conductivity of epoxy resin by the addition of a mixture of graphite nanoplatelets and silicon carbide microparticles

Effects of graphene oxides on the cure behaviors of a tetrafunctional epoxy resin

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