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Wettability Investigation of UV/O-3 and Acid Functionalized MWCNT and MWCNT/PMMA Nanocomposites by Contact Angle Measurement

Title
Wettability Investigation of UV/O-3 and Acid Functionalized MWCNT and MWCNT/PMMA Nanocomposites by Contact Angle Measurement
Author
Hussain, Manwar
Keywords
SITU BULK-POLYMERIZATION; WALLED CARBON NANOTUBES; INTERFACIAL TENSIONS; DISPERSION FORCES; COMPOSITES; SURFACE; PMMA; ADDITIVITY; BLACK; FILMS
Issue Date
2015-01
Publisher
HINDAWI PUBLISHING CORPORATION
Citation
JOURNAL OF NANOMATERIALS, v. 2015. Article ID 130270
Abstract
The dispersion state of individual MWCNT in the polymer matrix influences the mechanical, thermal, and electrical properties of the resulting composite. One method of obtaining a good dispersion state of MWCNT in a polymer matrix is to functionalize the surface of MWCNT using various treatments to enhance the surface energy and increase the dispersibility of MWCNT. In this study, wettability and surface energy of UV/O-3 and acid-treated multiwall carbon nanotubes (MWCNTs) and its polymethyl methacrylate (PMMA) polymer nanocomposites were measured using contact angle analysis in various solvent media. Contact angle analysis was based on ethylene glycol-water-glycerol probe liquid set and data was further fitted into geometric mean (Fowkes), van Oss-Chaudhury-Good (GvOC), and Chang-Qing-Chen (CQC) models to determine both nonpolar and acid base surface energy components. Analysis was conducted on MWCNT thin films subjected to different levels of UV/O-3 and acid treatments as well as their resulting MWCNT/PMMA nanocomposites. Contact angle analysis of thin films and nanocomposites revealed that the total surface energy of all samples was well fitted with each other. In addition, CQC model was able to determine the surface nature and polarity of MWCNT and its nanocomposites. Results indicated that the wettability changes in the thin film and its nanocomposites are due to the change in surface chemistry. Finally, electrical properties of nanocomposites were measured to investigate the effect of surface functionality (acid or basic) on the MWCNT surfaces.
URI
https://www.hindawi.com/journals/jnm/2015/130270/http://hdl.handle.net/20.500.11754/35651
ISSN
1687-4110; 1687-4129
DOI
10.1155/2015/130270
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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