Polymer nanowire arrays with high thermal conductivity and superhydrophobicity fabricated by a nano-moulding technique

Bing Yang Cao, Jie Kong, Yan Xu, Kai Leung Yung, An Cai

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

High thermal conductivity and superhydrophobicity are highly desired for micro/nanofluidic devices. Good thermal conductivity is helpful for thermal control and managements. Superhydrophobicity can benefit fluid friction reduction and liquid droplet control. We report on an improved nano-moulding technique which can prepare polymer (high density polyethylene/HDPE) nanowire arrays with high thermal conductivity (more than 10W/mK) and superhydrophobicity (contact angle >150°). The thermal conductivities of the fabricated high-density polyethylene (HDPE) nanowire arrays with diameters of 100 nm and 200 nm, measured by a laser flash method, are about 2 orders of magnitude higher than their bulk counterparts. The estimated thermal conductivity of a single HDPE nanowire is as high as 26.5 W/mK at room temperature. The self-organized surfaces of polymer nanowire arrays are found to have micro-to-nanoscale hierarchical nanostructures, and have superhydrophobicity of >150°. contact angles. This technique is promising for fabrication of micro/nanofluidics devices due to the advantages of simple fabrication, high-quality, low-cost, and mass-production.
Original languageEnglish
Title of host publicationASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011
Pages489-495
Number of pages7
Volume2
DOIs
Publication statusPublished - 1 Dec 2011
EventASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011 - Edmonton, AB, Canada
Duration: 19 Jun 201122 Jun 2011

Conference

ConferenceASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011
Country/TerritoryCanada
CityEdmonton, AB
Period19/06/1122/06/11

ASJC Scopus subject areas

  • Process Chemistry and Technology

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