Non-covalent functionalization of multi walled carbon nanotubes and their application for conductive composites

Xu, Likun; Wong, Siew Yee; Tjiu, Wuiwui Chauhari; Lyons, Benjamin P.; Oh, Sue Ann; He, Chaobin

doi:10.1016/j.carbon.2008.02.022

Cited by 37 publications

(28 citation statements)

References 6 publications

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“…Covalent functionalization can be carried out with, for example, polymers [88], by carboxylation and nitration for increasing sorption characteristics [89], by covalent functionalization with e caprolactam or L alanine for increased biocompatibility [90], and by the formation of an ester linkage between lipase and MWCNTs for biocatalyst and biosensor activities [91]. Noncovalent functionalization of MWCNTs is less reported; functionalization by pyrene-PEG molecules through pi-pi stacking [92] and by adsorption of H 2 NCH 2 CH 2 ONa [93] has been reported. Even though not yet common in hybrid membrane technology, such modifications are thought highly important because progress in carbon nanotubes enhanced membranes is to be expected from these modified and/or tuned materials.…”

Section: Categories Of Carbon Nanotubesmentioning

confidence: 99%

The Separation Power of Nanotubes in Membranes: A Review

Bruggen

2012

ISRN Nanotechnology

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Research on mixed matrix membranes in which nanoparticles are used to enhance the membrane's performance in terms of flux, separation, and fouling resistance has boomed in the last years. This review probes on the specific features and benefits of one specific type of nanoparticles with a well-defined cylindrical structure, known as nanotubes. Nanotube structures for potential use in membranes are reviewed. These comprise mainly single-wall carbon nanotubes (SWCNTs) and multiwall carbon nanotubes (MWCNTs), but also other structures and materials, which are less studied for membrane applications, can be used. Important issues related to polymer-nanotube interactions such as dispersion and alignment are outlined, and a categorization is made of the resultant membranes. Applications are reviewed in four different areas, that is, gas separation, water filtration, drug delivery, and fuel cells.

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Section: Categories Of Carbon Nanotubesmentioning

confidence: 99%

The Separation Power of Nanotubes in Membranes: A Review

Bruggen

2012

ISRN Nanotechnology

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“…The combination of CNTs with various functional groups makes them suitable in number of areas of applied research, including such as polymerreinforcement [18], electronic-based components [19,20], chemical and biological sensors [21,22], energy storage [23,24] and catalysis [25]. The development of functionalized CNTs in the area of catalysis involves various methods of opening, coating, filling and attaching CNTs with foreign metal oxides through either ionic [26,27] or covalent bonding interactions [28,29].…”

Section: Carbon Nanotubes (Cnts)mentioning

confidence: 99%

“…Involves the non-covalent attachment by molecular adsorption or the wrapping of various functional materials around the surface of CNTs [23,24,27,45] Known as chemical functionalization which involves oxidative treatment reaction to introduce defect sites on the C=C graphitic networks by the formation of surface active groups on the sidewall or end parts of the tube through the use of chemical reagents:…”

Section: Covalent Functionalization Non-covalent Functionalization Rementioning

confidence: 99%

Utilization of Carbon Nanotubes as a Support Material in Metal-Based Catalyst Systems: Applications in Catalysis

Pahmy¹,

Mohamed

2012

ENG

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Carbon nanotubes (CNTs), which were discovered in 199, have emerged as one of the most distinctive classes of carbon-allotrope materials. They exhibit various fascinating physical, electronic and mechanical properties, which have stimulated significant interest among researchers. CNT researchers have focused on exploring and deploying CNTs in the area of synthesis and implementing them in numerous applications, such as nanoelectronic devices, compositereinforcement material, catalyst supports, etc. Their combination of light weight, nanoscale diameter, mesoporous structure, high aspect ratio, high thermal conductivity and high stability render them as effective support materials. This review focuses on the applications of CNTs combined with various metal-based particles in the field of catalysis. The effects of the incorporation of CNTs into catalyst systems are discussed in terms of the catalytic activity, reaction selectivity and reaction pathway. The remarkable properties of CNTs that fulfil the requirements of support catalysts are also discussed. Patents relevant to the topic have been discussed.

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“…Compared with SWCNTs, MWCNTs are lower cost, better availability and always conductive, which make them attractive materials for fabricating conductive polymer-based composites [4][5][6]. It is worth pointing out that the electronic properties of the perfect MWCNTs are rather similar to those of the perfect SWCNTs, because the coupling between the cylinders is weak in MWCNTs [1].…”

Section: Introductionmentioning

confidence: 99%

“…Incorporation of nanotubes into polymer can potentially provide structural materials with dramatically increased modulus and strength [4][5][6]. Meanwhile, the low-loading levels and the nearly one-dimensional electronic structure of the MWCNTs allow improved conductivity to be achieved, while avoiding or minimising the deterioration of the original properties of polymer, such as mechanical properties and the low-melt flow viscosity needed for material processing.…”

Section: Introductionmentioning

confidence: 99%