Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34109
PIRA download icon_1.1View/Download Full Text
Title: Temperature-dependent gas transport performance of vertically aligned carbon nanotube/parylene composite membranes
Authors: Zhang, L
Yang, J
Wang, X
Zhao, B
Zheng, G 
Issue Date: 2014
Source: Nanoscale research letters, 2014, v. 9, 448, p. 1-8
Abstract: A novel composite membrane consisting of vertically aligned carbon nanotubes (CNTs) and parylene was successfully fabricated. Seamless filling of the spaces in CNT forests with parylene was achieved by a low-pressure chemical vapor deposition (CVD) technique and followed with the Ar/O2 plasma etching to expose CNT tips. Transport properties of various gases through the CNT/parylene membranes were explored. And gas permeances were independent on feed pressure in accordance with the Knudsen model, but the permeance values were over 60 times higher than that predicted by the Knudsen diffusion kinetics, which was attributed to specular momentum reflection inside smooth CNT pores. Gas permeances and enhancement factors over the Knudsen model firstly increased and then decreased with rising temperature, which confirmed the existence of non-Knudsen transport. And surface adsorption diffusion could affect the gas permeance at relatively low temperature. The gas permeance of the CNT/parylene composite membrane could be improved by optimizing operating temperature.
Keywords: Carbon nanotube
Composite membrane
Gas transport
Parylene
Publisher: Springer New York LLC
Journal: Nanoscale Research Letters 
ISSN: 1931-7573
DOI: 10.1186/1556-276X-9-448
Rights: © 2014 Zhang et al.; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproductionin any medium, provided the original work is properly credited.
The following publication Zhang, L., Yang, J., Wang, X., Zhao, B., & Zheng, G. (2014). Temperature-dependent gas transport performance of vertically aligned carbon nanotube/parylene composite membranes. Nanoscale Research Letters, 9, 448, 1-8 is available at https://dx.doi.org/10.1186/1556-276X-9-448
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
Zhang_Temperature-Dependent_Gas_Transport.pdf1.47 MBAdobe PDFView/Open
Open Access Information
Status open access
File Version Version of Record
Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page views

137
Last Week
1
Last month
Citations as of Mar 24, 2024

Downloads

89
Citations as of Mar 24, 2024

SCOPUSTM   
Citations

18
Last Week
0
Last month
0
Citations as of Mar 28, 2024

WEB OF SCIENCETM
Citations

13
Last Week
0
Last month
0
Citations as of Mar 28, 2024

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.