News Column

Studies from Federal University Update Current Data on Nanocomposites

February 28, 2014

By a News Reporter-Staff News Editor at Science Letter -- A new study on Nanocomposites is now available. According to news reporting from Porto Alegre, Brazil, by NewsRx journalists, research stated, "The aim of this work was to characterize poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) nanocomposites with halloysite nanotube (HNT) filler, both natural HNT and HNT modified with different functionalized organosilanes. Nanocomposites with 3 wt.% HNT were obtained by melt processing in a twin screw co-rotating extruder."

The news correspondents obtained a quote from the research from Federal University, "The nanocomposites were characterized in terms of their morphology and thermal and mechanical properties. TEM images provided evidence of the nanocomposite formation. The incorporation of modified HNT altered the mechanical properties of the material depending on the silane functional group responsible for interacting with the polymer. The HNT modified with aminosilanes did not exhibit the expected reinforcing effect. It is possible that the amino group reacted with the carbonyl group of PHBV, changing its chemical structure and thus its final properties."

According to the news reporters, the research concluded: "A thermo-mechanical study and TGA results corroborated these findings, indicating a lower viscosity and a decrease in the degradation temperatures of the polymer in the presence of aminosilane-modified HNT."

For more information on this research see: The effects of silane coupling agents on the properties of PHBV/halloysite nanocomposites. Applied Clay Science, 2014;87():311-319. Applied Clay Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Applied Clay Science -

Our news journalists report that additional information may be obtained by contacting L.N. Carli, Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil. Additional authors for this research include T.S. Daitx, G.V. Soares, J.S. Crespo and R.S. Mauler (see also Nanocomposites).

Keywords for this news article include: Brazil, Porto Alegre, South America, Nanotechnology, Emerging Technologies

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Source: Science Letter

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