Kim WD et al. (2012), Three-dimensional heterostructure of metallic n...

ECB-ART-42385

Nanoscale Res Lett 2012 Mar 29;71:202. doi: 10.1186/1556-276X-7-202.

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Three-dimensional heterostructure of metallic nanoparticles and carbon nanotubes as potential nanofiller.

Kim WD , Huh JY , Ahn JY , Lee JB , Lee D , Hong SW , Kim SH .

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The effect of the dimensionality of metallic nanoparticle-and carbon nanotube-based fillers on the mechanical properties of an acrylonitrile butadiene styrene (ABS) polymer matrix was examined. ABS composite films, reinforced with low dimensional metallic nanoparticles (MNPs, 0-D) and carbon nanotubes (CNTs, 1-D) as nanofillers, were fabricated by a combination of wet phase inversion and hot pressing. The tensile strength and elongation of the ABS composite were increased by 39% and 6%, respectively, by adding a mixture of MNPs and CNTs with a total concentration of 2 wt%. However, the tensile strength and elongation of the ABS composite were found to be significantly increased by 62% and 55%, respectively, upon addition of 3-D heterostructures with a total concentration of 2 wt%. The 3-D heterostructures were composed of multiple CNTs grown radially on the surface of MNP cores, resembling a sea urchin. The mechanical properties of the ABS/3-D heterostructured nanofiller composite films were much improved compared to those of an ABS/mixture of 0-D and 1-D nanofillers composite films at various filler concentrations. This suggests that the 3-D heterostructure of the MNPs and CNTs plays a key role as a strong reinforcing agent in supporting the polymer matrix and simultaneously serves as a discrete force-transfer medium to transfer the loaded tension throughout the polymer matrix.

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Genes referenced: LOC100887844

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References [+] :

Kim, Tailoring the carbon nanostructures grown on the surface of Ni-Al bimetallic nanoparticles in the gas phase. 2011, Pubmed, Echinobase

	Figure 1. Schematic diagram for the preparation of polymer-CNT composite thin films.
	Figure 2. SEM and TEM images. (a) SEM and (b) TEM images of SU-CNTs, SEM images of (c) acid-treated SU-CNTs (i.e., metal core removed) and (d) Ni-Al bimetallic nanoparticles, and (e) photograph and (f) SEM image of ABS/SU-CNT composite thin film prepared by hot pressing.
	Figure 3. Thermogravimetric analysis of SU-CNTs.
	Figure 4. Strain-stress curve and the evolution of tensile strength. (a) Strain-stress curve of pure ABS, ABS/SU-CNTs (2 wt%), ABS/MNPs/CNTs (2 wt%), and (b) the evolution of tensile strength of ABS polymer composites with SU-CNTs or a mixture of MNPs/CNTs as a function of filler concentration.