Magnetically processed carbon nanotube/epoxy nanocomposites: Morphology, thermal, and mechanical properties

Abdalla, M. Sebawe; Dean, Derrick; Theodore, Merlin; Fielding, Jennifer; Nyairo, Elijah; Price, Gary E.

doi:10.1016/j.polymer.2009.05.059

Cited by 152 publications

(90 citation statements)

References 50 publications

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“…[55][56][57][58] Among these studies, well-ordered polymer/carbon nanotube (CNT) nanocomposites have attracted considerable attention due to their excellent mechanical and electronic properties. [55,59] In the hydrogel field, an anisotropic, fluorescent, thermoresponsive hydrogel material that was based on magnetically oriented Eu(III)-multiwalled CNTs (MWCNTs) was reported by Maggini et al [57] In their work, they fabricated oriented Eu(III)-MWCNT frameworks by utilizing their intrinsic anisotropic magnetic susceptibilities and then further controlled the alignment of the CNT frameworks via a magnetic field (Figure 2b). Such an oriented nanocomposite structure exhibits anisotropic emission properties in the final hybrid hydrogel material.…”

Section: Magnetic Fieldsmentioning

confidence: 99%

Bioinspired Nanocomposite Hydrogels with Highly Ordered Structures

et al. 2017

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In the human body, many soft tissues with hierarchically ordered composite structures, such as cartilage, skeletal muscle, the corneas, and blood vessels, exhibit highly anisotropic mechanical strength and functionality to adapt to complex environments. In artificial soft materials, hydrogels are analogous to these biological soft tissues due to their “soft and wet” properties, their biocompatibility, and their elastic performance. However, conventional hydrogel materials with unordered homogeneous structures inevitably lack high mechanical properties and anisotropic functional performances; thus, their further application is limited. Inspired by biological soft tissues with well‐ordered structures, researchers have increasingly investigated highly ordered nanocomposite hydrogels as functional biological engineering soft materials with unique mechanical, optical, and biological properties. These hydrogels incorporate long‐range ordered nanocomposite structures within hydrogel network matrixes. Here, the critical design criteria and the state‐of‐the‐art fabrication strategies of nanocomposite hydrogels with highly ordered structures are systemically reviewed. Then, recent progress in applications in the fields of soft actuators, tissue engineering, and sensors is highlighted. The future development and prospective application of highly ordered nanocomposite hydrogels are also discussed.

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Section: Magnetic Fieldsmentioning

confidence: 99%

Bioinspired Nanocomposite Hydrogels with Highly Ordered Structures

et al. 2017

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“…This allows a lower loading of nanoparticles to be used, thus decreasing the composite cost and likelihood of re-agglomeration. In this paper, two techniques of alignment are discussed: (i) electric field [25,26,37,61]; and (ii) a magnetic field [62][63][64][65][66][67][68][69] alignment.…”

Section: Post-dispersion: Alignment Of Nanoparticlesmentioning

confidence: 99%

“…In the case of a magnetic field, a magnetic (nano) particles has to be bonded/functionalised on the nano-reinforcement to increase the interaction with the field. Several techniques have been developed to functionalise the nanoparticles, for example, using magnetite as magnetic material [67][68][69], which has some advantages as low cost, easy fabrication process, and avoid more oxidation.…”

Section: Alignment By a Magnetic Fieldmentioning

confidence: 99%

Effect of pre and Post-Dispersion on Electro-Thermo-Mechanical Properties of a Graphene Enhanced Epoxy

Poutrel

Wang

et al. 2016

Appl Compos Mater

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Graphene nanoplatelet (GNP) modified epoxy nanocomposites are becoming attractive to aerospace due to possible improvements in their mechanical, electrical and thermal properties at no weight cost. The process of obtaining reliable material systems provides many challenges, especially at larger scale (a volume effect). This paper reports on the main fabrication stages of GNP-based epoxy composites, namely (i) pre-dispersion, (ii) dispersion, and (iii) post-dispersion. Each stage is developed to show the interest and potential it delivers for property enhancement. Chemical modification of GNP is presented; functionalisation by Triton X-100 shows elastic modulus improvements of the epoxy at low particle content (≤3%). The post-dispersion step as an alignment of GNP into the epoxy by an electrical field is discussed. The electrical conductivity is below the simulated percolation threshold and an improvement of the thermal diffusivity of 220% when compared to non-oriented GNP epoxy sample is achieved. The work demonstrates how the addition of functionalised graphene platelets to an epoxy resin will allow it to act as electrical and thermal conductor rather than as insulator

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“…The carbon nanotubes (CNTs) are used in advanced polymeric matrix composites to further improve the properties. CNT/epoxy nanocomposites were previously fabricated and studied for creep behavior [3], thermal and mechanical properties [4], morphology [5], cure behavior [6], effect of interfacial chemistry on molecular mobility [7], damping capacity in a broad temperature range [8], doping of nano-particles (titania) for synergistic effects in the multiphase nanocomposites [9], electrical and thermal conduction mechanisms [10], influence of cup-stacked CNTs [11], and effect of silane functionalization on the properties of CNT/epoxy nanocomposites [12].…”

Section: Introductionmentioning

confidence: 99%