TY - JOUR
T1 - The effect of CNT functionalization on electrical and relaxation phenomena in MWCNT/chitosan composites
AU - Zarate-Triviño, D. G.
AU - Prokhorov, E.
AU - Luna-Bárcenas, G.
AU - Mendez-Nonell, J.
AU - González-Campos, J. B.
AU - Elizalde-Peña, E.
AU - Mota-Morales, Josué D.
AU - Santiago-Jacinto, P.
AU - Terrones, M.
AU - Gómez-Salazar, S.
AU - Nuño-Donlucas, S. M.
AU - Sanchez, I. C.
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - The effect of the type of CNT (functionalized and non-functionalized) on the dielectric relaxation phenomena and conductivity of MWCNT/chitosan (MWCNT/CS) was investigated. Composites were prepared by the solvent cast method by homogeneously dispersing CNT into a CS matrix. FTIR analysis suggests the formation of hydrogen bonding in functionalized-MWCNT/CS whereas the CS remains unaffected in non-functionalized films. In the low conductivity region, the α-relaxation process associated with a glass transition in CS is affected by the MWCNT; the Vogel temperature increases due to a decrease of the water content. The σ-relaxation exhibits a typical Arrhenius-type temperature dependence that is independent on the moisture content. Strong interfacial interactions of functionalized-MWCNT with the CS matrix are responsible for high values of the contact resistance Rc between individual CNT. Conversely, non-functionalized MWCNTs exhibit a typical 3D percolation threshold at ca. 4 wt %.
AB - The effect of the type of CNT (functionalized and non-functionalized) on the dielectric relaxation phenomena and conductivity of MWCNT/chitosan (MWCNT/CS) was investigated. Composites were prepared by the solvent cast method by homogeneously dispersing CNT into a CS matrix. FTIR analysis suggests the formation of hydrogen bonding in functionalized-MWCNT/CS whereas the CS remains unaffected in non-functionalized films. In the low conductivity region, the α-relaxation process associated with a glass transition in CS is affected by the MWCNT; the Vogel temperature increases due to a decrease of the water content. The σ-relaxation exhibits a typical Arrhenius-type temperature dependence that is independent on the moisture content. Strong interfacial interactions of functionalized-MWCNT with the CS matrix are responsible for high values of the contact resistance Rc between individual CNT. Conversely, non-functionalized MWCNTs exhibit a typical 3D percolation threshold at ca. 4 wt %.
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U2 - 10.1016/j.matchemphys.2015.02.041
DO - 10.1016/j.matchemphys.2015.02.041
M3 - Article
AN - SCOPUS:84924626391
SN - 0254-0584
VL - 155
SP - 252
EP - 261
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
ER -