Ionic Liquid (IL) Compatibilization of Macropore‐Infused Nanocomposite Emulsion Thermosets (MINETs) for Structural Ion Transport

ABSTRACT Macropore‐infused nanocomposite emulsion thermosets (MINETs) offer a novel approach for multifunctional monoliths and carbon fiber composites (CFCs), leveraging tunable porosity and material compatibility to meet the demands of aerospace and energy applications. Using 1‐ethyl‐3‐methylimidazolium tetrafluoroborate (EMIMBF 4 ) and a propylene glycol‐ionic liquid (IL) triblock copolymer surfactant, we successfully stabilized an epoxy‐IL emulsion with compatibility with particles such as silica, super‐activated carbon (SAC), and graphene. Optimal surfactant levels (5.11% for SAC and graphene and 3.46% for silica) facilitated continuous IL phases, enhancing porosity and ionic conductivity, as confirmed by mass loss, mercury porosimetry, and ionic conductivity analyses. SEM revealed well‐defined nanostructures, while resin content adjustments highlighted a balance between mechanical integrity and conductivity. These advancements provide a strong foundation for integrating IL‐MINETs into multifunctional composites for structural power storage and flame‐resistant materials, with significant potential in aerospace and renewable energy systems. Ongoing work focuses on fluorinated IL surfactants to enhance conductivity and stability, as well as designing layered MINET composites for multifunctional applications.