Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30358
Title: Polymer nanowire arrays with high thermal conductivity and superhydrophobicity fabricated by a nano-molding technique
Authors: Cao, BY
Kong, J
Xu, Y
Yung, KL 
Cai, A
Issue Date: 2013
Publisher: Taylor & Francis Inc
Source: Heat transfer engineering, 2013, v. 34, no. 2-3, p. 131-139 How to cite?
Journal: Heat Transfer Engineering 
Abstract: High thermal conductivity is helpful for thermal control and management, and superhydrophobicity can benefit fluid friction reduction and liquid droplet control in micro-/nanodevices. We report on a nano-molding technique that can prepare polyethylene nanowire arrays with high thermal conductivity (more than 10W/m-K) and superhydrophobicity (contact angle >150). The thermal conductivities of the fabricated high-density polyethylene nanowire arrays with diameters of 100nm and 200nm, measured by a laser flash method, are about 2 orders of magnitude higher than their bulk counterparts. The estimated thermal conductivity of a single high-density polyethylene nanowire is as high as 26.5W/m-K at room temperature, while the thermal conductivity of low-density polyethylene nanowire is a little smaller. The self-organized surfaces of polymer nanowire arrays are found to have micro-to-nanoscale hierarchical nanostructures, and have superhydrophobicity of greater than 150 contact angles for water. We also measure the wettability of organic liquids, including glycerin, ethanol, paraffin liquid, and methyl silicone oil. We find glycerin gives hydrophobic wettability, but the others give hydrophilic wettabilities. This technique is promising for fabrication due to the advantages of simple fabrication, high quality, low cost, and mass production.
URI: http://hdl.handle.net/10397/30358
ISSN: 0145-7632
DOI: 10.1080/01457632.2013.703097
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