TY - JOUR
T1 - The dispersion stability of multi-walled carbon nanotubes in the presence of poly(styrene/α-methyl styrene/acrylic acid) random terpolymer
AU - Woo, Hyuck Chang
AU - In, Woo Cheong
AU - Sang, Eun Shim
AU - Choe, Soonja
PY - 2006/10
Y1 - 2006/10
N2 - Aqueous dispersions of pristine and functionalized (COOH- and NH 2-) multi-walled, carbon nanotubes (MWNTs) were prepared by using three types of surfactants: sodium dodecyl sulfate (SDS, anionic), PEO-PPO-PEO (Pluronic P84, non-ionic), and poly(styrene/α-methyl styrene/acrylic acid) random terpolymer, i.e., alkali-soluble resin (ASR). The aggregate size, ζ-potential, and storage stability of the MWNT aqueous dispersions were investigated by using dynamic light scattering and the turbidity method at room temperature. The exfoliation of the MWNT aggregates was determined by a UV-visible spectrophotometer and the morphology of the surfactant-coated MWNTs was observed by transmission electron microscopy (TEM). In all cases, ASR showed better dispersion stability with the smallest aggregate size, compared with the other surfactants, because of its unique molecular structure, i.e., randomly incorporated carboxylic acid groups and planar phenyl groups that can be irreversibly and effectively adsorbed on the MWNT surface. A predominantly-exfoliated morphology of MWNTs was observed in the presence of ASR from the strong intensity of the UV-vis spectrum at 263 nm.
AB - Aqueous dispersions of pristine and functionalized (COOH- and NH 2-) multi-walled, carbon nanotubes (MWNTs) were prepared by using three types of surfactants: sodium dodecyl sulfate (SDS, anionic), PEO-PPO-PEO (Pluronic P84, non-ionic), and poly(styrene/α-methyl styrene/acrylic acid) random terpolymer, i.e., alkali-soluble resin (ASR). The aggregate size, ζ-potential, and storage stability of the MWNT aqueous dispersions were investigated by using dynamic light scattering and the turbidity method at room temperature. The exfoliation of the MWNT aggregates was determined by a UV-visible spectrophotometer and the morphology of the surfactant-coated MWNTs was observed by transmission electron microscopy (TEM). In all cases, ASR showed better dispersion stability with the smallest aggregate size, compared with the other surfactants, because of its unique molecular structure, i.e., randomly incorporated carboxylic acid groups and planar phenyl groups that can be irreversibly and effectively adsorbed on the MWNT surface. A predominantly-exfoliated morphology of MWNTs was observed in the presence of ASR from the strong intensity of the UV-vis spectrum at 263 nm.
KW - Alkali-soluble resin
KW - Dispersion stability
KW - Multi-walled carbon nanotubes
KW - Terpolymer
KW - Ultrasonication
UR - http://www.scopus.com/inward/record.url?scp=33750902954&partnerID=8YFLogxK
U2 - 10.1007/bf03218722
DO - 10.1007/bf03218722
M3 - Article
AN - SCOPUS:33750902954
SN - 1598-5032
VL - 14
SP - 545
EP - 551
JO - Macromolecular Research
JF - Macromolecular Research
IS - 5
ER -