sc7b02292_si_001.pdf (1.79 MB)
Development of Sustainable Thermosets from Cardanol-based Epoxy Prepolymer and Ionic Liquids
journal contribution
posted on 2017-08-11, 20:43 authored by Thi Khanh Ly Nguyen, Sébastien Livi, Bluma G. Soares, Guilherme M. O. Barra, Jean-François Gérard, Jannick Duchet-RumeauIn
this work, the development of new biobased epoxy networks using phosphonium-based
ionic liquids combined with dicyanamide and phosphinate counteranions
as initiators of epoxy prepolymers was compared with a biobased epoxy–amine
system. Ionic liquids (ILs) displayed high reactivity toward cardanol-based
epoxy prepolymers, and the obtained biobased epoxy/IL networks highlighted
a glass transition temperature of around 30 °C, an excellent
thermal stability higher than 450 °C and higher hydrophobic behavior
compared to biobased epoxy–amine networks. In addition, the
use of a cardanol-based epoxy prepolymer as a modifier of epoxy/IL
networks was also investigated. In this case, the final properties
of epoxy/IL networks were improved by the presence of biobased epoxy
compounds, especially their surface energy as well as their fracture
toughness (+180%), suggesting a new way to develop partially biobased
epoxy coatings.