Oxygen Diffusion into Multiwalled Carbon Nanotube Doped Polystrene Latex Films Using Fluorescence Technique
Loading...
Date
2013
Authors
Yargı, Önder
Ugur, Saziye
Pekcan, Önder
Journal Title
Journal ISSN
Volume Title
Publisher
Springer/Plenum Publishers
Abstract
This study examines the oxygen diffusion into polystyrene (PS) latex/multiwalled carbon nanotube (MWNT) nanocomposite films (PS/MWNT) consisting of various amounts of MWNT via steady state fluorescence technique (SSF). PS/MWNT films were prepared from the mixture of MWNT and pyrene (P)-labeled PS latexes at various compositions at room temperature. These films were then annealed at 170 A degrees C above glass transition (T-g) temperature of PS. Fluorescence quenching measurements were performed for each film separately to evaluate the effect of MWNT content on oxygen diffusion. The Stern-Volmer equation for fluorescence quenching is combined with Fick's law for diffusion to derive the mathematical expressions. Diffusion coefficients (D) were produced and found to be increased from 1.1 x 10(-12) to 41 x 10(-12) cm(2)s(-1) with increasing MWNT content. This increase was explained via the existence of large amounts of pores in composite films which facilitate oxygen penetration into the structure.
Description
Keywords
Carbon nanotubes, Fluorescence, Diffusion, Oxygen, Quenching, Composite film
Turkish CoHE Thesis Center URL
Citation
6
WoS Q
N/A
Scopus Q
N/A
Source
Volume
23
Issue
3
Start Page
357
End Page
366