Publications by authors named "Gea Prioglio"
A one-pot, two-step process was developed for the preparation of pyrrole compounds from 2,5-dimethylfuran. The first step was the acid-catalyzed ring-opening reaction of 2,5-dimethylfuran (DF), leading to the formation of 2,5-hexanedione (HD). A stoichiometric amount of water and a sub-stoichiometric amount of sulfuric acid were used by heating at 50 °C for 24 h.
View Article and Find Full Text PDFHexagonal Boron Nitride as Filler for Silica-Based Elastomer Nanocomposites.
Nanomaterials (Basel)
December 2023
Article Synopsis
- Two-dimensional hexagonal boron nitride (hBN) is gaining interest due to its impressive mechanical strength, thermal conductivity, and lubricating properties, making it a candidate for enhancing composite materials.
- This study shows that using functionalized hBN can effectively replace silica in elastomer composites, improving their rheological and mechanical properties.
- Techniques like FT-IR and SEM-EDS confirmed the successful functionalization of hBN and a reduction in the number of stacked layers, leading to composite materials that performed better in terms of rigidity and thermal balance compared to those with traditional silica.
Article Synopsis
- Researchers reduced the hysteresis in elastomer composites for tires by functionalizing carbon black (CB) with sulfur-containing pyrrole compounds that react with elastomer chains.
- The functionalization was achieved using bio-based chemicals with high yields, resulting in a process characterized by efficient carbon use.
- The modified carbon blacks improved tire performance by increasing rigidity, reducing energy loss by about 10% at 70 °C, and enhancing tensile properties, especially with 66% replacement of traditional CB.
Elastomer composites with low hysteresis are of great importance for sustainable development, as they find application in billions of tires. For these composites, a filler such as silica, able to establish a chemical bond with the elastomer chains, is used, in spite of its technical drawbacks. In this work, a furnace carbon black (CB) functionalized with polar groups was used in replacement of silica, obtaining lower hysteresis.
View Article and Find Full Text PDFThe ultimate properties and resistance to fracture of nanocomposites based on poly(1,4--isoprene) from (natural rubber, NR) and a high surface area nanosized graphite (HSAG) were improved by using HSAG functionalized with 2-(2,5-dimethyl-1H-pyrrol-1-yl)propane-1,3-diol (serinol pyrrole) (HSAG-SP). The functionalization reaction occurred through a domino process, by simply mixing HSAG and serinol pyrrole and heating at 180 °C. The polarity of HSAG-SP allowed its dispersion in NR latex and the isolation of NR/HSAG-SP masterbatches via coagulation.
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