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Carbon Nanotube Assisted Electrical Treeing for Vascular Network Synthesis

Published online by Cambridge University Press:  31 January 2011

Kristopher D. Behler  and
Eric D. Wetzel
Kristopher D. Behler
Affiliation:
kristopher.behler@arl.army.milkbehler@gmail.com, U. S. Army Research Laboratory, Composites and Hybrid Materials Branch, Aberdeen Proving Grounds, Maryland, United States
Eric D. Wetzel
Affiliation:
eric.wetzel@us.army.mil, U. S. Army Research Laboratory, Composites and Hybrid Materials Branch, Aberdeen Proving Grounds, Maryland, United States
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Abstract

Electrical treeing (ET) is a stepwise dielectric breakdown process that generates a branched, hollow network of tubules in the dielectric between the electrode and ground. In this study, the controlled growth of electrical trees (ETs) in epoxies is demonstrated as a technique for fabricating synthetic vascular systems in engineering materials. A number of experimental conditions are explored, including AC versus DC voltage and geometric arrangement of the electrode and ground. AC growth tends to induce highly branched, “bush-like” trees while DC growth tends to produce lower-order branched structures. In addition, treating electrode surfaces with multi-walled carbon nanotubes (MWCNTs) is shown to promote ET initiation, most likely due to enhancements in the local electric field intensity. The utility of these structures for vascular applications is demonstrated by filling the channels with dyed liquids.

Keywords

polymerbiomimetic (assembly)fluidics
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1204: Symposium K – Nanotubes and Related Nanostructures-2009 , 2009 , 1204-K18-38
Copyright
Copyright © Materials Research Society 2010

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