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Ida Palazzo,Marialuigia Raimondo,Giovanna Della Porta,Liberata Guadagno,Ernesto Reverchon 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.90 No.-
Supercritical emulsions extraction (SEE-C) technology was used to produce PMMA/diglycidyl ether ofbisphenol A microcapsules acting as a health-monitoring element. A comparison between SEE-C andsolvent evaporation was carried out. Best results were obtained using SEE-C: spherical microcapsuleswith a smooth surface and a mean size of 220 nm, with an encapsulation efficiency up to 79%, wereobtained. SEE-C capsules preserve their stability for the entire time frame analyzed (30 days). Impact tests were carried out on strips of carbonfiber reinforced composites coated with an aqueouspaint in which capsules were previously dispersed: dye leaking associated with capsules breaking wasevidenced.
Pasquale Longobardi,Annaluisa Mariconda,Elisa Calabrese,Marialuigia Raimondo,Carlo Naddeo,Luigi Vertuccio,Salvatore Russo,Generoso Iannuzzo,Liberata Guadagno 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.54 No.-
A stable initiator for ROMP reactions, suitably designed to be embedded in structural resins, has been synthetized. It rapidly polymerizes cyclic olefins in reactive environments. The thermal stability and chemical inertness towards oxirane rings allow its employment in the form of molecular complex in epoxy precursors thus reducing the amount of initiator in structural self-healing materials of 90% wt/wt, simultaneously preserving the catalytic activity at high temperatures (180–200 C) also in presence of the aromatic primary amine (DDS). NMR and FTIR spectroscopy highlighted a relevant initiator stability able to fulfill industrial requirements. Self-healing efficiency has been found to be 103%.