BROWSE

Related Researcher

Author's Photo

Chae, Han Gi
Polymer nano-composites and Carbon Fiber Laboratory (P&C Lab)
Research Interests
  • Polymer Physics/ Processing, Carbon Nano-materials, Ultra high performance/ multifuctional nano-composites, Smart textile/ fiber

ITEM VIEW & DOWNLOAD

Probe diffusion of single-walled carbon nanotubes in semidilute solutions of polyacrylonitrile homo- and copolymers: Effects of topological constraints and polymer/Nanorod interactions

Cited 3 times inthomson ciCited 6 times inthomson ci
Title
Probe diffusion of single-walled carbon nanotubes in semidilute solutions of polyacrylonitrile homo- and copolymers: Effects of topological constraints and polymer/Nanorod interactions
Author
Xiao, ZhiweiGupta, MurariBaltas, GeorgeLiu, TaoChae, Han GiKumar, Satish
Keywords
Single-walled carbon nanotube; Polyacrylonitrile; Semidilute solution
Issue Date
2012-10
Publisher
ELSEVIER SCI LTD
Citation
POLYMER, v.53, no.22, pp.5069 - 5077
Abstract
With varying the molecular weight, copolymer chemical structure and concentration, the probe diffusion behavior of single-walled carbon nanotubes (SWCNTs) in N, N-dimethylacetamide (DMAc) solutions of polyacrylonitrile (PAN) was studied by dynamic light scattering (DLS) technique. In combination with the systematic viscosity property investigation for PAN/DMAc system, the probe diffusion results provided insight to understand the interactions between PAN and SWCNTs. It was found that, due to depletion interaction, the SWCNT diffusion positively deviates from the Stokes–Einstein (SE) relation in PAN homopolymer solutions. However, in PAN copolymer solution, the SWCNT diffusion mostly obeys the SE relation, which was speculated as a result of hydrogen-bonding formation between the carboxylic acid functional groups in PAN copolymers and on purified SWCNTs. Moreover, due to the unique features of SWCNT probes – very long, extremely rigid, and adjustable bundle diameter, the SWCNT probe diffusion unambiguously revealed the topological constraints of polymer network responsible for the retardation of thin rod diffusion. Quantitative analysis indicated that the correlation length rather than the “tube” diameter of polymer liquid is the critical length scale to dictate the diffusion retardation of SWCNTs in polymer solutions.
URI
Go to Link
DOI
10.1016/j.polymer.2012.09.006
ISSN
0032-3861
Appears in Collections:
MSE_Journal Papers
Files in This Item:
2-s2.0-84867090038.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

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

MENU