Moisture Condensation Behavior of Hierarchically Carbon Nanotube-Grafted Carbon Nanofibers

Title
Moisture Condensation Behavior of Hierarchically Carbon Nanotube-Grafted Carbon Nanofibers
Authors
육지호
Keywords
carbon nanotubes, carbon nanofibers, hierarchical surface, scale difference, rapid dry, moisture
Issue Date
2013
Publisher
ACS APPLIED MATERIALS & INTERFACES
Series/Report no.
ACS APPLIED MATERIALS & INTERFACES; vol.5 no.21 startpage 11115 endpage 11122
Abstract
Hierarchical micro/nanosurfaces with nanoscale roughness on microscale uneven substrates have been the subject of much recent research interest because of phenomena such as superhydrophobicity. However, an understanding of the effect of the difference in the scale of the hierarchical entities, i.e., nanoscale roughness on microscale uneven substrates as opposed to nanoscale roughness on (a larger) nanoscale uneven surface, is still lacking. In this study, we investigated the effect of the difference in scale between the nano- and microscale features. We fabricated carbon nanotube-grafted carbon nanofibers (CNFs) by dispersing a catalyst precursor in poly (acrylonitrile) (PAN) solution, electrospinning the PAN/catalyst precursor solution, carbonization of electrospun PAN nanofibers, and direct growth of carbon nanotubes (CNTs) on the CNFs. We investigated the relationships between the catalyst concentrations, the size of catalyst nanoparticles on CNFs, and the sizes of CNFs and CNTs. Interestingly, the hydrophobic behavior of micro/nano and nano/nano hierarchical surfaces with water droplets was similar; however a significant difference in the water condensation behavior was observed. Water condensed into smaller droplets on the nano/nano hierarchical surface, causing it to dry much faster.
URI
dx.doi.org/10.1021/am403348q
http://dspace.inha.ac.kr/handle/10505/32948
ISSN
1944-8244
Appears in Collections:
College of Engineering(공과대학) > Applied Organic Materials Engineering (유기응용재료공학) > Local Access Journal, Report (유기응용재료공학 논문, 보고서)

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