Surfactant-based dispersant for multiwall carbon nanotubes to prepare ceramic composites by a sol-gel method.
Summary of "Surfactant-based dispersant for multiwall carbon nanotubes to prepare ceramic composites by a sol-gel method."
A dispersant for multiwall carbon nanotubes (MWCNTs) is proposed that fulfils the requirements of creating a uniform dispersion in the matrix and obtaining a good interface between CNTs and the matrix, and is soluble in generic nonpolar solvents. This dispersant is based on a long chain surfactant, called in this work dabcosil stearate, containing a stearate-based 18-carbon alkyl chain as an anion, and a silsesquioxane containing a bridged, positively charged 1,4-diazoniabicyclo[2.2.2]octane group. It provides not only a very good dispersion medium for the MWCNTs, but also a very good interface between MWCNTs and ceramic matrices, such as alumina and zirconia, prepared by the sol-gel method.
Affiliation
Instituto de Física, Universidade Federal do Rio Grande do Sul , PO Box 15051, CEP 91501-970 Porto Alegre, RS Brazil.
Journal Details
This article was published in the following journal.
Name: Langmuir : the ACS journal of surfaces and colloids
ISSN: 1520-5827
Pages: 1447-52
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22145715
- DOI: http://dx.doi.org/10.1021/la203056f
Medical and Biotech [MESH] Definitions
Soot
A dark powdery deposit of unburned fuel residues, composed mainly of amorphous CARBON and some HYDROCARBONS, that accumulates in chimneys, automobile mufflers and other surfaces exposed to smoke. It is the product of incomplete combustion of carbon-rich organic fuels in low oxygen conditions. It is sometimes called lampblack or carbon black and is used in INK, in rubber tires, and to prepare CARBON NANOTUBES.
Nanotubes
Nanometer-sized tubes composed of various substances including carbon (CARBON NANOTUBES), boron nitride, or nickel vanadate.
Nanotubes, Carbon
Nanometer-sized tubes composed mainly of CARBON. Such nanotubes are used as probes for high-resolution structural and chemical imaging of biomolecules with ATOMIC FORCE MICROSCOPY.
Nanotubes, Peptide
NANOTUBES formed from cyclic peptides (PEPTIDES, CYCLIC). Alternating D and L linkages create planar rings that self assemble by stacking into nanotubes. They can form pores through CELL MEMBRANE causing damage to cells.
Pulmonary Surfactant-associated Protein C
A pulmonary surfactant associated protein that plays a role in alveolar stability by lowering the surface tension at the air-liquid interface. It is a membrane-bound protein that constitutes 1-2% of the pulmonary surfactant mass. Pulmonary surfactant-associated protein C is one of the most hydrophobic peptides yet isolated and contains an alpha-helical domain with a central poly-valine segment that binds to phospholipid bilayers.
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