Conductive carbon-nanotube/polymer composites: Spectroscopic monitoring of the exfoliation process in water

Grossiord, Nadia; Loos, Joachim; Meuldijk, J.; Regev, Oren; Miltner, HE; Mele, Bruno Van; Koning, CE Cor

doi:10.1016/j.compscitech.2006.01.035

Cited by 39 publications

(31 citation statements)

References 12 publications

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“…UV-vis absorbance decreases until a critical surfactant concentration is reached, which corresponds to the minimum amount of surfactant required to optimally cover the external surface of Ag nanoparticles present in the solution. As reported in the literature [24], a further increase of surfactant concentration does not result in higher absorbance values as a ''plateau" was reached. It should be noted that in this work all nanocomposites were produced using a surfactant/Ag nanoparticle weight ratio of 1, which is well in the plateau region of Fig.…”

Section: Influence Of Surfactant Addition On Ag Nanoparticles and Sismentioning

confidence: 65%

Morphological analysis of self-assembled SIS block copolymer matrices containing silver nanoparticles

Peponi

Tercjak

Torre

et al. 2008

Composites Science and Technology

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Section: Influence Of Surfactant Addition On Ag Nanoparticles and Sismentioning

confidence: 65%

Morphological analysis of self-assembled SIS block copolymer matrices containing silver nanoparticles

Peponi

Tercjak

Torre

et al. 2008

Composites Science and Technology

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“…CNT Exfoliation: All sonication processes, as well monitoring by UV-Vis spectroscopy, were carried out using the conditions described in [91]. For each type and batch of CNTs, the concentration of surfactant was chosen so as to individualize all of the CNTs which could be debundled by the sonication-driven debundling process (see method A in [92]).…”

Section: Methodsmentioning

confidence: 99%

“…Sonication was stopped when the maximum exfoliation of the CNTs was reached, as monitored by UV-Vis absorbance. [43,44,91] High shear mixing using the Ultra-Turrax allowed the CNT films to be finely split in the solution so that shorter sonication times were required to obtain a dispersion of maximally individualized CNTs [10].…”

Section: Methodsmentioning

confidence: 99%

High‐Conductivity Polymer Nanocomposites Obtained by Tailoring the Characteristics of Carbon Nanotube Fillers

Grossiord

Loos

Laake

et al. 2008

Adv Funct Materials

219

120

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We present a detailed study of the influence of carbon nanotube (CNT) characteristics on the electrical conductivity of polystyrene nanocomposites produced using a latex‐based approach. We processed both industrially‐produced multi‐wall CNT (MWCNT) powders and MWCNTs from vertically‐aligned films made in‐house, and demonstrate that while the raw CNTs are individualized and dispersed comparably within the polymer matrix, the electrical conductivity of the final nanocomposites differs significantly due to the intrinsic characteristics of the CNTs. Owing to their longer length after dispersion, the percolation threshold observed using MWCNTs from vertically‐aligned films is five times lower than the value for industrially‐produced MWCNT powders. Further, owing to the high structural quality of the CNTs from vertically‐aligned films, the resulting composite films exhibit electrical conductivity of 103 S m−1 at 2 wt% CNTs. On the contrary, composites made using the industrially‐produced CNTs exhibit conductivity of only tens of S m−1. To our knowledge, the measured electrical conductivity for CNT/PS composites using CNTs from vertically‐aligned films is by far the highest value yet reported for CNT/PS nanocomposites at this loading.

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“…As we have previously reported, calculations were based on the interaction between the thiol group of DT and the Ag surface. [17,37,44] The surfactant/Ag nanoparticle weight ratio of 1.0 was found to be the optimum concentration for the production of nanocomposite films. Before analysing the morphology of nanocomposites, neat SBS block copolymer and DT/SBS films were analyzed in order to verify that DT did not change the block copolymer nanostructure.…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembling of SBS Block Copolymers as Templates for Conductive Silver Nanocomposites

Peponi

Tercjak

Gutierrez

et al. 2008

Macro Materials & Eng

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Novel nanocomposites based on conductive Ag nanoparticles and a self‐assembled polystyrene‐block‐polybutadiene‐block‐polystyrene (SBS) block copolymer were investigated. Good confinement of the nanoparticles into polystyrene microphase was achieved by the addition of DT as surfactant. The polymeric matrix kept its hexagonal order packed cylindrical structure up to 7 wt.‐% content of Ag nanoparticles. An electrostatic force microscopy (EFM) analysis of well‐dispersed metal‐organic hybrid Ag/SBS films was used to characterize the electric behavior of the conductive nanocomposites.magnified image

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Conductive carbon-nanotube/polymer composites: Spectroscopic monitoring of the exfoliation process in water

Cited by 39 publications

References 12 publications

Morphological analysis of self-assembled SIS block copolymer matrices containing silver nanoparticles

Morphological analysis of self-assembled SIS block copolymer matrices containing silver nanoparticles

High‐Conductivity Polymer Nanocomposites Obtained by Tailoring the Characteristics of Carbon Nanotube Fillers

Self‐Assembling of SBS Block Copolymers as Templates for Conductive Silver Nanocomposites

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