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The Morphology of Laser-Synthesized Carbon Nano-Fillers: the Influence on Polymer-Based Composites

The Morphology of Laser-Synthesized Carbon Nano-Fillers: the Influence on Polymer-Based Composites. Lavinia Gavrila-Florescu 1* , Ion Sandu 1 1 National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, Bucharest, Romania

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The Morphology of Laser-Synthesized Carbon Nano-Fillers: the Influence on Polymer-Based Composites

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  1. The Morphology of Laser-Synthesized Carbon Nano-Fillers: the Influence on Polymer-Based Composites Lavinia Gavrila-Florescu1*, Ion Sandu1 1National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, Bucharest, Romania *IMT-Bucharest, 126A, Erou Iancu Nicolae street, 077190, PO-BOX 38-160, 023573, Bucharest, Romania MOTIVATION Carbon nanoparticles are considered high-potential filler materials for the improvement of mechanical and physical polymer properties; the focus of the work was to drive these materials into a regime where they can favorably interact with the matrix. GENERAL FEATURES OF CARBON NANOPOWDER SYNTHESIZED BY LASER-INDUCED PYROLYSIS • Coalescence in bigger particles. Agglomeration occurs already in the flame. • Bending through the graphite nano-ribbons • Size depends on gas composition and experimental parameters (10-60 nm) MAIN CARBON POWDER MORPHOLOGIES Fullerene-like (C6H6/C2H4/N2O) Carbon nano-ribbons (C2H2/SF6) C/F=3 TURBOSTRATIC (C2H2/SF6) TURBOSTRATIC (C6H6/C2H4) TESTS FOR POSSIBLE APPLICATIONS • Laser induced pyrolysis  morphologically different carbon nanopowders with specific chemical properties; Experimental confirmation by their particular behavior during interaction with different chemical and biological systems;  Electrical conduction of polymer/carbon composite strongly influenced by electrical resistivity of filler * sample’s density: 1.2 g/cm3 Ohmic behavior Resistivity vs carbon content 1/d002 and La vs (C/F)at ratio Resistance vs soot structure and morphology CONCLUSIONS  characteristics of the obtained nanocomposite are affected by properties and dispersion of the addition material;  the morphology of the carbon nanopowder depends on both gas mixture and experimental parameters;  optimal concentration of the filler was around 2% (wt);  better results obtained by addition of laser-synthesized carbon nanopowder;  the additional reinforcement with carbon/glass fibers led to an important enhancement of mechanic characteristics;  the studies are in progress. Acknowledgement: Some of the results were obtained in the frame of the Project POSDRU/89/1.5/S/63700.

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