Geometric control and tuneable pore size distribution of buckypaper and buckydiscs

Whitby, Raymond L. D.; Fukuda, Toshio; Maekawa, Toru; James, Stuart L.; Mikhalovsky, Sergey V.

doi:10.1016/j.carbon.2008.02.028

Cited by 151 publications

(109 citation statements)

References 25 publications

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“…The calculated porosity I = 0.67 corresponds well to the published values for MWCNT networks [10]. Mechanical properties of manufactured structures were followed in the course of twelve compression and relaxation cycles with cyclic accumulation of residual strain.…”

Section: Resultsmentioning

confidence: 58%

Stress-strain Hysteresis of a Carbon Nanotube Network as Polymer Nanocomposite Filler under Cyclic Deformation

Slobodian¹,

Sáha²,

Zatloukal³

2011

AIP Conference Proceedings

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Abstract.A network of entangled multiwall carbon nanotubes is an assembly of non-bonded and randomly oriented units whose mechanical behavior is affected by their buckling, compression and slippage at contact points. Slippage and irreversible nanotube rearrangements are evidenced by the hysteresis in the stress-strain curves during loading and unloading cycles. To model the mechanical behavior, a nonlinear rheological model is proposed as a combination of the elastic and the friction stresses and a kinetic equation.

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Section: Resultsmentioning

confidence: 58%

Stress-strain Hysteresis of a Carbon Nanotube Network as Polymer Nanocomposite Filler under Cyclic Deformation

Slobodian¹,

Sáha²,

Zatloukal³

2011

AIP Conference Proceedings

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“…1.8 g/cm 3 [8]. Also, the network porosity corresponds to the published values for MWNT networks [9].…”

Section: Resultsmentioning

confidence: 72%

Effect of compressive strain on electric resistance of multi-wall carbon nanotube networks

Slobodian

Riha

Lengálová

et al. 2011

Journal of Experimental Nanoscience

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The network of entangled multi-wall carbon nanotubes is shown as a conductor whose resistance is sensitive to compressive strain, both in the course of strain growth and when loading/unloading cycles are imposed. If the compression is applied, the resistance decrease is up to 25% at the maximum applied deformation. The experimental data are analysed using the Weibull distribution model and a contact network model to get an estimate of the contact resistance between carbon nanotubes and the formation of contacts in the course of compression.

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“…Water vapour is very likely to be absorbed by PSf co-polymers and cause swelling of the structure [31,58,59] while only adsorption should occur in the case of the CNTs due to the inability of water to penetrate the crystalline graphene network [60]. Although strong swelling and permanent structural parameters changes of CNT BPs was reported in the case of immersion/drying in alcohol mixtures [61], it is highly unlikely in the case of water due to the hydrophobic nature of the CNTs [45]. Recent work on the use of functionalized CNTs as RH detectors did not present any swelling [62] and the BP structure therefore appears as very stable to water.…”

Section: Membrane Supports With Aromatic Poly(amide) Filmmentioning

confidence: 99%

Fabrication of thin film composite poly(amide)-carbon-nanotube supported membranes for enhanced performance in osmotically driven desalination systems

Dumée

Lee

Sears

et al. 2013

Journal of Membrane Science

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Cite this article as: Ludovic Dumée, Judy Lee, Kallista Sears, Blaise Tardy, Mikel Duke and Stephen Gray, Fabrication of thin film composite poly(amide)-carbon-nanotube supported membranes for enhanced performance in osmotically driven desalination systems, Journal of Membrane Science, http://dx.doi.org/10. 1016/j.memsci.2012.09.026 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe search for lower energy consumption desalination systems has been driving research in the past decade towards the investigation of osmotically driven membrane processes, such as forward osmosis (FO) or osmotic distillation (OD). Despite similarities with reverse osmosis (RO) membranes, thin film composite (TFC) for FO membranes require careful design to reduce salt concentration polarization formation within the large pores composing the supporting layer. An investigation of a novel, highly stable, robust support made solely of carbon nanotubes (CNTs), which could find applications in both RO and FO was undertaken. TFC membranes were fabricated by interfacially polymerizing for the first time a dense poly(amide) (PA) layer on selfsupporting bucky-papers (BPs) made of hydroxyl-functionalized entangled CNTs. These hydrophilic supports exhibited low contact angle with water (< 20 o ), high water uptake capacity (17 wt%), large porosity (> 90%), making it a promising material when compared with poly(sulfone) (PSf), the traditional polymer used to fabricate TFC membrane supports in RO. In addition, the impact of the support hydrophilicity on the stability of the interfacially polymerized film and on water adsorption was investigated by oxygen-plasma treating various potential support materials, exhibiting similar geometrical properties. The morphology and salt diffusion of both CNT BP and PSf supports were investigated, and the novel BP-PA composite membranes were found to be superior to commercially available TFC membranes. KeywordsCarbon nanotube bucky-paper; forward osmosis; thin film composite membrane; poly(amide) interfacial polymerization 3

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Geometric control and tuneable pore size distribution of buckypaper and buckydiscs

Cited by 151 publications

References 25 publications

Stress-strain Hysteresis of a Carbon Nanotube Network as Polymer Nanocomposite Filler under Cyclic Deformation

Stress-strain Hysteresis of a Carbon Nanotube Network as Polymer Nanocomposite Filler under Cyclic Deformation

Effect of compressive strain on electric resistance of multi-wall carbon nanotube networks

Fabrication of thin film composite poly(amide)-carbon-nanotube supported membranes for enhanced performance in osmotically driven desalination systems

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