Carbon/polymer nanocomposite for electronic applications: Dispersion properties of carbon based nanoparticles in aqueous environment and toxicological impacts

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Abstract

Polymeric matrices filled with carbon nanoparticles are commonly employed in the fabrication of chemical sensors. When carbon/polymer nanocomposite come into contact with a substance, that is chemically compatible with the polymeric matrix, its conductivity gradually decreases with the exposure to the substance. This change In the nanocomposite electric properties is at the base of chemical sensors functioning. Because of their fascinating electric, thermal and mechanical properties, carbon based nanoparticles are most widely used In the preparation of nanocomposites for numerous applications. The potential risks of their widespread use, as well as their possible positive impact are just beginning to take place. An adequate physical and chemical characterization of the materials Is required In order to investigate the toxicological properties of nanomaterials. The dynamics of dispersion, the rate of dissolution, the characteristics of nanoparticles aggregates are all relevant to the behaviour of, and responses to, nanoparticles In biological and ecological systems. Moreover, the dispersion of nanoparticles In aqueous media and the stability of these preparations is a critical step in performing toxicological tests. In this work we investigate the dissolution behaviour and the aggregation kinetic of various form of carbon nanoparticles in aqueous environment. The dissolution and evolution of the aggregation state of MWCNTs, SWCNTs functionalized with water soluble polymer and carbon black nanoparticles in PBS solution (Phosphate Buffered Saline) has been observed. Nanoparticles were characterized with nitrogen sorption experiments with a surface area and pore analyzer, SEM measurements and periodically checked for dissolution, with absorbance measurements, and DLS analysis. Different kinetics of nanoparticles aggregation have been observed for CB and MWCNTs with respect to SWCNTs. The stability of the aqueous dispersions has been tested. © 2008 American Institute of Physics.
Original languageEnglish
DOIs
Publication statusPublished - 2008
Event4th International Conference on Times of Polymers (TOP) and Composites - , Italy
Duration: 1 Jan 2008 → …

Conference

Conference4th International Conference on Times of Polymers (TOP) and Composites
CountryItaly
Period1/1/08 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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