Understanding the synthesis of directly spinnable carbon nanotube forests

Huynh, Chi; Hawkins, Stephen C.

doi:10.1016/j.carbon.2009.11.032

Cited by 156 publications

(109 citation statements)

References 28 publications

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“…A mixture of Helium (95%) -Acetylene (5%) was used as the carbon feedstock and heated to between 650 and 750°C. The CNTs typically have an outer diameter of ~10-15 nm (Figure 2Figure 2) and length of 150-300 µm [18].…”

Section: Materials and Processingmentioning

confidence: 99%

“…The images were analysed using the software, ISIS and the edge-pores were not taken in consideration for the calculations. The minimum, mean and maximum average pore size distributions were calculated using Feret's approach [13][14][15][16][17][18][19][20]. In this method, 3 diameters are calculated for each pore, corresponding namely to the minimum, the mean and the maximum pore size, which gives information on pore shape distribution.…”

Section: Pore Sizementioning

confidence: 99%

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Characterization and evaluation of carbon nanotube Bucky-Paper membranes for direct contact membrane distillation

Dumée

Sears

Schütz

et al. 2010

Journal of Membrane Science

305

130

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Self-supporting carbon nanotube (CNT) Bucky-Papers have unique structural and surface properties which can be utilised in many applications. In this work we characterised pure selfsupporting CNT membranes, where CNTs were held together only by Van der Waals forces, and evaluated their potential and performance in direct contact membrane distillation. The membranes were found to be highly hydrophobic (contact angle of 113°), highly porous (90%), and to exhibit a thermal conductivity of 2.7 kW/m 2 •h. We demonstrate, as a proof of concept, that self-supporting CNT Bucky-Paper membranes can be used for desalination in a direct contact membrane distillation setup with 99% salt rejection and a flux rate of ~12 kg/m 2 *h at a water vapour partial pressure difference of 22.7kPa. Ageing of the membranes by delamination, factor limiting their performance, is also reported but work is currently done to address this issue by investigating composite material structures.

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Section: Materials and Processingmentioning

confidence: 99%

Section: Pore Sizementioning

confidence: 99%

Characterization and evaluation of carbon nanotube Bucky-Paper membranes for direct contact membrane distillation

Dumée

Sears

Schütz

et al. 2010

Journal of Membrane Science

305

130

View full text Add to dashboard Cite

show abstract

“…A mixture of Helium (95%) -Acetylene (5%) was used as the carbon feedstock and heated to between 650 and 750°C. The CNTs typically have an outer diameter of ~10-15 nm and length of 150-300 µm [10].…”

Section: A Carbon Nanotube Growthmentioning

confidence: 99%

Carbon nanotube based composite membranes for water desalination by membrane distillation

Dumée

Sears

Schütz

et al. 2010

Desalination and Water Treatment

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Abstract-New technologies are required to improve desalination efficiency and increase water treatment capacities. One promising low energy technique to produce potable water from either sea or sewage water is Membrane Distillation (MD). However, to be competitive with other desalination processes, membranes need to be designed specifically for the MD process requirements. Here we report on the design of Carbon Nanotube (CNT) based composite material membranes for Direct Contact Membrane Distillation (DCMD). The membranes have been thoroughly characterized and also tested in a DCMD setup under different feed temperatures and test conditions. We demonstrate that Bucky-paper membranes can be used for purification of synthetic seawater via the DCMD process and, most importantly, that the composite Bucky-paper (BP) structures show improved lifetime and performance compared to their self-supporting BP counterparts.

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“…It should be noted that most nanotube arrays are not spinnable. In order to investigate their spinnability, nanotube arrays grown with increasing growth times from 10 to 180 min were first compared as model materials (Huynh & Hawkins, 2010;Sun & Peng, unpublished results). It was found that the prolonged growth time dramatically decreased the spinnability of the arrays, and the arrays grown longer than 30 min did not show good spinnability.…”

Section: Carbon Nanotube Sheetsmentioning

confidence: 99%