Mechanical properties of carbon nanotube paper in ionic liquid and aqueous electrolytes

Whitten, Philip G.; Spinks, Geoffrey M.; Wallace, Gordon G.

doi:10.1016/j.carbon.2005.02.038

Cited by 105 publications

(66 citation statements)

References 29 publications

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“…For example, buckypapers obtained from dispersions containing SWNTs and surfactants exhibited Young's moduli that fall between 0.5 and 2.3 GPa, tensile strengths within the range 4.7-33 MPa, and ductility ranging from 1-2.5%. 8,[25][26][27] The similarity between the mechanical properties of the buckypapers examined here may be due to the similar size of the dispersants present in the membrane. Consistent with this hypothesis are the results of a recent study that showed that the tensile strength of buckypapers made from SWNTs was significantly improved only when high molecular mass dispersants, such as proteins or polysaccharides, were incorporated into the membranes.…”

Section: Physical Propertiesmentioning

confidence: 81%

Synthesis, properties and water permeability of SWNT buckypapers

et al. 2012

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The ability of macrocyclic ligands to facilitate formation of dispersions of single-walled carbon nanotubes (SWNTs) was investigated using a combination of absorption spectrophotometry and optical microscopy. Vacuum filtration of aqueous dispersions containing SWNTs and various macrocyclic ligands (derivatised porphyrin, phthalocyanine, cyclodextrin and calixarene) afforded self-supporting membranes known as buckypapers. Microanalytical data and energy dispersive X-ray spectra were obtained for these buckypapers and provided evidence for retention of the macrocyclic ligands within the structure of the membranes. The electrical conductivities of the membranes varied between 30 ± 20 and 220 ± 60 S cm−1, while contact angle analysis revealed they all possessed hydrophilic surfaces. The mechanical properties of buckypapers prepared using macrocyclic ligands as dispersants were shown to be comparable to that of a benchmark material prepared using the surfactant Triton X-100 (Trix). Incorporation of the macrocyclic ligands into SWNT buckypapers was found to increase their permeability up to ten-fold compared to buckypapers prepared using Trix. No correlation was observed between the water permeability of the membranes and the average size of either their surface or internal pores. However, the water permeability of the membranes was found to be inversely dependent on their surface area. The ability of macrocyclic ligands to facilitate formation of dispersions of single-walled carbon nanotubes (SWNTs) was investigated using a combination of absorption spectrophotometry and optical microscopy. Vacuum filtration of aqueous dispersions containing SWNTs and various macrocyclic ligands (derivatised porphyrin, phthalocyanine, cyclodextrin and calixarene) afforded selfsupporting membranes known as buckypapers. Microanalytical data and energy dispersive X-ray spectra were obtained for these buckypapers and provided evidence for retention of the macrocyclic ligands within the structure of the membranes. The electrical conductivities of the membranes varied between 30 AE 20 and 220 AE 60 S cm À1

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Section: Physical Propertiesmentioning

confidence: 81%

Synthesis, properties and water permeability of SWNT buckypapers

et al. 2012

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“…Ionic liquid (IL), a kind of fascinating molten salt with nearly zero vapor pressure and high thermal stability [5][6][7], has demonstrated high affinity toward various kinds of solid, such as carbon nanotubes [8][9][10][11][12][13][14], silica [15][16][17] and clays [18]. Various interactions, including cation-π interaction [8][9][10][11]19], van der Waal forces [13], delocalized electron interaction [14] and hydrogen bonding [16,18] have been well acknowledged and therefore subjected to a plenty of applications [14,[16][17][18][20][21][22][23][24][25][26]. Thanks to these interactions, ILs with specific structure can be employed as possible interfacial modifiers for various filled polymer composites.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of novel functional liquid and its application as a modifier in SBR/silica composites

Lei¹,

Tang²,

Guo³

et al. 2010

Express Polym. Lett.

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Abstract.A novel functional ionic liquid (IL), 1-methylimidazolium methacrylate (MimMa), was synthesized for modifying styrene butadiene rubber (SBR)/silica composites. MimMa was found to be readily polymerized via the initiated radical mechanism and could be analogously grafted onto rubber chains during vulcanization. Substantial hydrogen bonding between polymerized MimMa (poly(MimMa)) and silica can facilitate the silica dispersion and improve the SBR/silica interfacial bonding. Filler networking, curing behavior, silica dispersion and mechanical performance of the modified SBR/silica composites were studied. With a low concentration of MimMa, remarkable improvements in the interfacial interactions and mechanical properties were achieved which was attributed to the improved silica dispersion and strengthened interfacial bonding induced by MimMa. A modified interphase structure was accordingly proposed and related to the mechanical performance of the modified SBR/silica composites.

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“…The advantage of using activated carbon and GCB adsorbents in SPE methods is their high adsorption abilities with respect to nonpolar and polar analytes; but they also show irreversible adsorption and low recoveries for some analytes [7]. Therefore, a new kind of SPE disk is required that combines the merits of C 18 and GCB/activated carbon adsorbents.…”

Section: Introductionmentioning

confidence: 99%

“…There are several reports on the use of CNT sheets in the fields of electronics and material science [14][15][16][17][18][19][20][21][22][23][24]. A CNT sheet, also called "bucky paper," is typically prepared by the vacuum filtration of a certain volume of CNT suspension through a filter [14,22].…”

Section: Introductionmentioning

confidence: 99%

“…CNT sheets can be readily assembled from SWCNTs, but are much more difficult to produce consistently from the more rigid MWCNTs [22]. SWCNT sheets have shown suitable mechanical properties and have been used as alternative actuators [14][15][16][17], electrolytes [18,19], artificial muscles [20], and sensors [21]. The SWCNT sheet possesses a much larger specific surface area than the SWCNT particles, and a sheet (47 mm in diameter) made from~30 mg of SWCNTs is typically 60 μm in thickness with a specific surface area of~700 m 2 /g [22].…”

Section: Introductionmentioning

confidence: 99%

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A new solid-phase extraction disk based on a sheet of single-walled carbon nanotubes

et al. 2008

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A new kind of solid-phase extraction disk based on a sheet of single-walled carbon nanotubes (SWCNTs) is developed in this study. The properties of such disks are tested, and different disks showed satisfactory reproducibility. One liter of aqueous solution can pass through the disk within 10-100 min while still allowing good recoveries. Two disks (DD-disk) can be stacked to enrich phthalate esters, bisphenol A (BPA), 4-n-nonylphenol (4-NP), 4-tert-octylphenol (4-OP) and chlorophenols from various volumes of solution. The results show that SWCNT disks have high extraction ability for all analytes. The SWCNT disk can extract polar chlorophenols more efficiently than a C 18 disk from water solution. Unlike the activated carbon disk, analytes adsorbed by the new disks can be eluted completely with 8-15 mL of methanol or acetonitrile. Finally, the DD-disk system is used to pretreat 1000-mL real-world water samples spiked with BPA, 4-OP and 4-NP. Detection limits of 7, 25, and 38 ng L −1 for BPA, 4-OP, and 4-NP, respectively, were achieved under optimized conditions. The advantages of this new disk include its strong adsorption ability, its high flow rate and its easy preparation.

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Mechanical properties of carbon nanotube paper in ionic liquid and aqueous electrolytes

Cited by 105 publications

References 29 publications

Synthesis, properties and water permeability of SWNT buckypapers

Synthesis, properties and water permeability of SWNT buckypapers

Synthesis of novel functional liquid and its application as a modifier in SBR/silica composites

A new solid-phase extraction disk based on a sheet of single-walled carbon nanotubes

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