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Featured researches published by O. Valentino.


VIII INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology | 2016

Influence of the nanotube oxidation on the rheological and electrical properties of CNT/HDPE composites

Maria Rossella Nobile; Elvira Somma; O. Valentino; George P. Simon; Heinz-Christoph Neitzert

Rheological and electrical properties of nanocomposites based on multi-walled carbon nanotubes (MWNTs) and high density polyethylene (HDPE), prepared by melt mixing in a micro-twin screw extruder, have been investigated. The effect of MWNT concentration (0.5 and 2.5 wt %) and nanotube surface treatment (oxidative treatment in a tubular furnace at 500°C for 1 hr in a 95% nitrogen, 5% oxygen atmosphere) has been analyzed. It has been found that the sample conductivity with oxidation of the nanotubes decreases more than 2 orders of magnitude.Scanning electron microscopy showed good adhesion and dispersion of nanotubes in the matrix, independently of the surface treatment. Electrical and rheological measurements revealed that the oxidative treatment, causing some reduction of the MWNT quality, decreases the efficiency of the nanotube matrix interaction.


Physica E-low-dimensional Systems & Nanostructures | 2008

Influence of the polymer structure and nanotube concentration on the conductivity and rheological properties of polyethylene/CNT composites

O. Valentino; Maria Sarno; N. G. Rainone; Maria Rossella Nobile; Paolo Ciambelli; Heinz C. Neitzert; George P. Simon


Macromolecular Symposia | 2007

Rheological and Structure Investigation of Melt Mixed Multi-Walled Carbon Nanotube/PE Composites

Maria Rossella Nobile; George P. Simon; O. Valentino; Melanie Morcom


Polymer Engineering and Science | 2017

The effect of the nanotube oxidation on the rheological and electrical properties of CNT/HDPE nanocomposites

Maria Rossella Nobile; O. Valentino; Melanie Morcom; George P. Simon; Giovanni Landi; Heinz-Christoph Neitzert


24th Annual Meeting of the Polymer Processing Society (PPS-24) | 2008

Monitoring of the sample electrical conductivity during temperature cycling of polyethylene/CNT composites

Heinrich Christoph Neitzert; N. G. Rainone; O. Valentino; Maria Rossella Nobile; Maria Sarno; Paolo Ciambelli


7th International Conference on Nanostructured Polymers and Nanocomposites | 2012

PTC elements based on high density polyethylene loaded with multi-walled carbon nanotubes

Heinz-Christoph Neitzert; O. Valentino; Maria Sarno; Maria Rossella Nobile; Paolo Ciambelli


Archive | 2009

Influence of MWNT on the physical properties of Polyethylene nanocomposites

Paolo Ciambelli; Maria Sarno; Heinrich Christoph Neitzert; Maria Rossella Nobile; Elvira Somma; O. Valentino


Archive | 2012

Proprietà reologiche e cristallizzazione indotta da flusso in nanocompositi a matrice polimerica e nanotubi in carbonio a parete multipla

Maria Rossella Nobile; O. Valentino; R. Iervolino; Elvira Somma


VI Convegno Nazionale sulla Scienza e Tecnologia dei Materiali | 2007

RHEOLOGICAL PROPERTIES AND CONDUCTIVITY OF POLYETHYLENE/CNT COMPOSITES

Maria Rossella Nobile; Paolo Ciambelli; Heinrich Christoph Neitzert; N. G. Rainone; Maria Sarno; George P. Simon; O. Valentino


Polymers in Nanotechnology 1st workshop of NanomateS-University of Salerno | 2007

Electrical and rheological properties of Polyethylene/CNT composites

Maria Sarno; Paolo Ciambelli; Maria Rossella Nobile; O. Valentino; N. G. Rainone; Heinrich Christoph Neitzert; George P. Simon

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L. Bove

University of Salerno

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