Abstract: Methods of forming a tape-like carbon nanotube (CNT) prepreg that may enhance the shear, transverse and axial mechanical properties of composite articles fabricated using the prepreg. Particularly, tape-like prepregs in which a CNT reinforcement material may be impregnated with a thermosetting resin and thermally latent ionic liquid cure agent. Prepregs may be formed of carbon nanotube reinforcement with specific alignment in one direction and continuous high degree of stretch to yield high tenacity and modulus. The CNT prepreg may have a specific cross-sectional aspect ratio between the prepreg width and the thickness that may result in enhanced shear and transverse strength combined with enhanced axial strength where applied to composite materials.

Abstract: Epoxy resin formulations and processes for producing composites via low temperature, isothermal infusion, the composites exhibiting performance characteristics suitable for aerospace materials and applications thereof, the formulations comprising: Type-1 anionic formulations; Type-2 anionic formulations; Type-2 anionic formulations with toughener; and cationic formulations. The composites include an epoxy resin formulation and one or more composite fiber materials, the composites formed via an isothermal infusion and cure process in which infusion and cure temperatures of the epoxy resin are about the same, are less than about 100° C., and cure time is less than about one hour. The composites have a glass transition temperature (Tg)?150° C. and a storage modulus ?3 GPa.

Abstract: Various embodiments provide multi-layered self-healing materials, capable of repairing puncture damage. The multi-layered self-healing materials, capable of repairing puncture damage of the various embodiments may be constructed by sandwiching a reactive (e.g., oxygen sensitive) liquid monomer formulation between two solid polymer panels, such as a polymer panel of Barex 210 IN (PBG) serving as the front layer panel and a polymer panel of Surlyn® 8940 serving as the back layer panel. The various embodiments may provide methods to produce multi-layered healing polymer systems. The various embodiments may provide a two-tier, self-healing material system that provides a non-intrusive capability to mitigate mid to high velocity impact damage in structures.

Abstract: Various embodiments provide multi-layered self-healing materials, capable of repairing puncture damage. The multi-layered self-healing materials, capable of repairing puncture damage of the various embodiments may be constructed by sandwiching a reactive (e.g., oxygen sensitive) liquid monomer formulation between two solid polymer panels, such as a polymer panel of Barex 210 IN (PBG) serving as the front layer panel and a polymer panel of Surlyn® 8940 serving as the back layer panel. The various embodiments may provide methods to produce multi-layered healing polymer systems. The various embodiments may provide a two-tier, self-healing material system that provides a non-intrusive capability to mitigate mid to high velocity impact damage in structures.