A low resistance boron-doped carbon nanotube–polystyrene composite

Watts, Paul; Hsu, Wen Kuang; Chen, George; Fray, Derek J.; Kroto, Harold W.; Walton, D. R. M.

doi:10.1039/b102989b

Cited by 91 publications

(46 citation statements)

References 23 publications

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“…As a result, the nanocomposites based on simple polymer-pristine nanotube blends prepared by highspeed mixing and/or ultrasonication have shown limited strength enhancement as compared with conventional composites, and their mechanical properties are noticeably below the highly anticipated potential. [7][8][9] To resolve these problems, there is growing research effort in understanding the interface between CNT and matrix. Functionalization of CNTs, which permits directly tailoring of the chemical and physical properties of nanotubes according to their specific applications, is envisaged as an ideal cut-in point and has therefore been extensively investigated.…”

mentioning

confidence: 99%

Phenolic Resin-MWNT Nanocomposites Prepared through an in situ Polymerization Method

Cui

Yan

Liu

et al. 2008

Polym J

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A simple but effective in situ polymerization method has been developed to prepare phenolic resin-based nanocomposites with pristine or carboxylated multi-walled carbon nanotubes (MWNTs) as fillers. As revealed by scanning electron microscopy, the nanotubes are well-dispersed in and strongly adhered to the phenolic resin. The resultant nanocomposites have thus obtained the improved thermostabilities. As compared to pristine MWNT-filled nanocomposite, the carboxylated MWNT-filled one has shown more improved thermostability, resulting from the higher dispersion quality of functionalized nanotubes. The related mechanisms have been analyzed qualitatively. To achieve the similar effects, however, more mixing energy should be deposited on the melt mixture in the melt-mixing process. These indicate that phenolic resin-MWNT nanocomposites with high performance may be realized by adoption of pertinent preparation method and moderate functionalized nanotubes.KEY WORDS: Phenolic Resin / MWNT / In situ Polymerization / Nanocomposite / Dispersion Behavior / Thermal Properties / Due to their excellent mechanical property and high aspect ratio, carbon nanotubes (CNTs) are increasingly considered to be unique reinforcement fillers for making polymer-based nanocomposites. [1][2][3][4][5][6] In order to achieve strength enhancement as high as possible, homogeneous dispersion of CNTs and strong interaction between CNT and surrounding matrix are generally required.7 However, the pristine nanotubes are usually bundled due to strong van de Waals interactions, thus making their dispersibility in most of polymer matrices rather poor. Otherwise, intrinsically smooth surface and chemical inertness of the nanotubes lead to their weak adhesion to polymer matrix. As a result, the nanocomposites based on simple polymer-pristine nanotube blends prepared by highspeed mixing and/or ultrasonication have shown limited strength enhancement as compared with conventional composites, and their mechanical properties are noticeably below the highly anticipated potential. [7][8][9] To resolve these problems, there is growing research effort in understanding the interface between CNT and matrix. Functionalization of CNTs, which permits directly tailoring of the chemical and physical properties of nanotubes according to their specific applications, is envisaged as an ideal cut-in point and has therefore been extensively investigated.10-15 Strength enhancement of the functionalized nanotube-filled nanocomposites was generally achieved. However, these functionalization techniques more or less rely on wet chemistry. Toxicity of chemicals and damage to nanotubes are issues which must be addressed. Comparatively, it may be easier and more direct as well as environment friendly for a given polymer matrix to prepare its nanocomposites by adopting a pertinent preparation method. At least, as having been proven, it is feasible for certain polymer matrix. 8,[16][17][18][19][20] In this work, taking phenolic resin as a matrix example, we have also addressed this iss...

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confidence: 99%

Phenolic Resin-MWNT Nanocomposites Prepared through an in situ Polymerization Method

Cui

Yan

Liu

et al. 2008

Polym J

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“…Due to the extraordinarily large aspect ratio of SWCNTs, up to 1,000, nanotubes tend to agglomerate to form ropes or bundles by means of intrinsic Van der Waals attraction [24]. One rope can contain hundreds of nanotubes, but the nanotubes can readily slide relative to each other due to the low shear modulus of the bundles [25][26][27]. This fact prevents good dispersion of nanotubes in the matrix and not only limits the reinforcing capabilities of the CNTs, but it can actually degrade the initial properties of the bulk matrix material alone.…”

Section: Obstacles To Accurate Experimentationmentioning

confidence: 99%

Coarse Molecular-Dynamics Analysis of Structural Transitions in Solid Materials

2010

Multiscale Modeling

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“…In response to this limitation, polymer-carbon nanotube composites have been proposed. These composites have only shown moderate strength enhancements when compared to other carbon fiber composite materials [4][5][6] due to a lack of uniform nanotube connectivity throughout the polymer matrix.…”

Section: Multifunctional Nanocomposite Filmsmentioning

confidence: 99%

Nanocomposite Sensing Skins for Distributed Structural Sensing

Lynch¹,

Loh

Hou³

et al. 2009

Nanotechnology in Construction 3

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Abstract. The operational safety of civil engineered structures can be jeopardized by structural deterioration (e.g., corrosion) and damage (e.g., yielding, cracking). Structural health monitoring has been proposed to provide engineers with sensors and algorithms that can detect structural degradation in a timely manner for costeffective correction. In this paper, a thin film material engineered at the nanoscale is proposed for distributed sensing of metallic structures. Assembled from single wall carbon nanotubes (SWNT) and polymers, the thin film's electrical properties are designed to change in response to external stimulus such as strain or tearing. Electrical impedance tomographic (EIT) conductivity imaging is adopted to make a measurement of the film conductivity over its complete surface area. The end result is a true distributed sensor offering engineers with impressive twodimensional maps from which strain and damage can be observed in fine detail.

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A low resistance boron-doped carbon nanotube–polystyrene composite

Cited by 91 publications

References 23 publications

Phenolic Resin-MWNT Nanocomposites Prepared through an in situ Polymerization Method

Phenolic Resin-MWNT Nanocomposites Prepared through an in situ Polymerization Method

Coarse Molecular-Dynamics Analysis of Structural Transitions in Solid Materials

Nanocomposite Sensing Skins for Distributed Structural Sensing

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