Effects of polymer wrapping and covalent functionalization on the stability of MWCNT in aqueous dispersions
Document Type
Article
Publication Date
3-15-2011
Abstract
The colloidal behavior of aqueous dispersions of functionalized multiwall carbon nanotubes (F-CNTS) formed via carboxylation and polymer wrapping with polyvinyl pyrrolidone (PVP) is presented. The presence of polymer on the nanotube surface provided steric stabilization, and the aggregation behavior of the colloidal system was quite different from its covalently functionalized analog. Based on hydrophobicity index, particle size distribution, zeta potential as well as the aggregation kinetics studied using time-resolved dynamic light scattering, the PVP wrapped CNT was somewhat less prone to agglomeration. However, its long-term stability was lower, and this was attributed to the partial unwrapping of the polyvinyl pyrrolidone layer on the CNT surface. © 2010 Elsevier Inc.
Identifier
79551473550 (Scopus)
Publication Title
Journal of Colloid and Interface Science
External Full Text Location
https://doi.org/10.1016/j.jcis.2010.12.052
ISSN
00219797
PubMed ID
21236442
First Page
383
Last Page
388
Issue
2
Volume
355
Grant
RC2ES018810
Fund Ref
National Institute of Environmental Health Sciences
Recommended Citation
Ntim, Susana Addo; Sae-Khow, Ornthida; Witzmann, Frank A.; and Mitra, Somenath, "Effects of polymer wrapping and covalent functionalization on the stability of MWCNT in aqueous dispersions" (2011). Faculty Publications. 11422.
https://digitalcommons.njit.edu/fac_pubs/11422
