Transparent and Conductive Polyethylene Oxide Film by the Introduction of Individualized Single‐Walled Carbon Nanotubes

Jung, Yong Chae; Muramatsu, Hiroyuki; Park, Ki Chul; Shimamoto, Daisuke; Kim, Jin Hee; Hayashi, T.; Song, Sung Moo; Kim, Yoong Ahm; Endo, Morinobu; Dresselhaus, M. S.

doi:10.1002/marc.200900446

Cited by 6 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Poor interfacial adhesion, lack of transfer of their properties, agglomeration and low uniformity of SWNT distribution are the biggest challenges when dealing with nanotube-reinforced polymer composites. 3 Achieving an optimum nanotubes dispersion and/or individualization in a nanocomposite material is of a great importance, since its final properties (e.g., mechanical or electrical performance) can be dramatically enhanced 4 and also because new features may arise, such as optical transparency, 5 which may provide unique applications to these materials.…”

Section: Introductionmentioning

confidence: 99%

Solvent-Free Preparation of High-Toughness Epoxy−SWNT Composite Materials

González‐Domínguez

Ansón‐Casaos

Díez‐Pascual

et al. 2011

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Multicomponent nanocomposite materials based on a high-performance epoxy system and single-walled carbon nanotubes (SWNTs) have been prepared. The noncovalent wrapping of nitric acid-treated SWNTs with a PEO-based amphiphilic block copolymer leads to a highly disaggregated filler with a boosted miscibility in the epoxy matrix, allowing its dispersion without organic solvents. Although direct dispersion of acid-treated SWNTs results in modestly improved epoxy matrix mechanical properties, the incorporation of wrapped SWNTs produces a huge increase in toughness (276% improvement at 0.5 wt % loading) and impact strength (193% at 0.5 wt % loading) with no detrimental effect on the elastic properties. A synergistic effect between SWNTs and the block copolymer is revealed on the basis of tensile and impact strength results. Atomic force microscopy has been applied, obtaining stiffness mappings that identify nanostructure features responsible of the dynamic mechanical behavior. The electrical percolation threshold is greatly reduced, from 0.31 to 0.03 wt % SWNTs when block copolymer-wrapped SWNTs are used, and all the measured conductivity values increased up to a maximum of 7 orders of magnitude with respect to the baseline matrix (1 wt % wrapped-SWNTs loading). This approach provides an efficient way to disperse barely dispersible SWNTs without solvents into an epoxy matrix, and to generate substantial improvements with small amounts of SWNTs.

show abstract

Section: Introductionmentioning

confidence: 99%

Solvent-Free Preparation of High-Toughness Epoxy−SWNT Composite Materials

González‐Domínguez

Ansón‐Casaos

Díez‐Pascual

et al. 2011

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Especially, it was revealed that polymer/CNTs nanocomposites exhibit dramatically enhanced thermal, mechanical, and electrical properties as compared with those of the pristine polymer. [6][7][8][9][10][11] However, the following two prerequisites must be satisfied to realize the desired performance: (i) the homogeneous dispersion of the CNTs throughout the polymer matrix and (ii) strong polymer-CNTs interfacial adhesion. [12][13][14][15] Polymeric foams (or porous polymeric materials) are used in many applications because of their excellent strength-to-weight ratio, good thermal and sound insulation properties, flexibility for generating the desired morphologies to meet specific applications, materials savings, etc.…”

Section: Introductionmentioning

confidence: 99%

Synthetic Aliphatic Biodegradable Poly(Butylene Succinate)/MWNT Nanocomposite Foams and Their Physical Characteristics

Lim

Lee

Jang

et al. 2011

Journal of Macromolecular Science, Part B

View full text Add to dashboard Cite

Synthetic aliphatic biodegradable poly(butylene succinate) (PBS) nanocomposites with multiwalled carbon nanotube (MWNT) were investigated to study the effects of the preparation method and MWNTs on physical characteristics of biodegradable polymer nanocomposite foams. PBS nanocomposites were prepared by the solution blending and melt mixing methods. Nanocomposites of PBS/MWNT were also prepared by the SOAM method, where the solution-blended nanocomposites were further mixed in the melt state. The dispersion of MWNTs in the PBS matrix was characterized by FT-Raman spectroscopy, field-emission scanning electron microscopy (FE-SEM), and field-emission transmission electron microscopy (FE-TEM). The mechanical and thermal properties of the PBS nanocomposites were measured using a universal test machine (UTM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). Nanocomposite foams with high-density closed cells were prepared by using a chemical blowing agent (CBA) that acted as a cell-nucleating agent. The effects of the foaming conditions and MWNTs on the blowing ratio, cell size distribution, and morphology of the expanded PBS foams were investigated. The effect of the CBA content on the blowing ratio, cell size distribution, and morphology was also investigated.

show abstract