Size dependent aqueous dispersibility of carboxylated multiwall carbon nanotubes
Document Type
Article
Publication Date
10-1-2012
Abstract
The size dependent colloidal behavior of aqueous dispersions of carboxylated multiwall carbon nanotubes (c-MWCNTs) is presented. The presence of carboxylic groups provided electrostatic stabilization in water, where the size affected agglomeration. While aspect ratio did not show any definite correlation, the hydrophobicity indices (HI), zeta potential and aggregation kinetics showed dependence on the length of the c-MWCNTs where the shorter c-MWCNTs showed significantly lower HI values, smaller particle aggregates, higher zeta potential values and higher critical coagulation concentrations (ccc) in the presence of electrolytes. Although the diameter of the short c-MWCNTs did not appear to influence their aggregation behavior, the longer c-MWCNTs showed a dependence on diameter where stability decreased with increasing CNT diameter. © 2012 The Royal Society of Chemistry.
Identifier
84866979311 (Scopus)
Publication Title
Journal of Environmental Monitoring
External Full Text Location
https://doi.org/10.1039/c2em30405h
e-ISSN
14640333
ISSN
14640325
PubMed ID
22972403
First Page
2772
Last Page
2779
Issue
10
Volume
14
Grant
R01GM085218
Fund Ref
National Institute of General Medical Sciences
Recommended Citation
Ntim, Susana Addo; Sae-Khow, Ornthida; Desai, Chintal; Witzmann, Frank A.; and Mitra, Somenath, "Size dependent aqueous dispersibility of carboxylated multiwall carbon nanotubes" (2012). Faculty Publications. 18080.
https://digitalcommons.njit.edu/fac_pubs/18080
