Abstract: The present disclosure is generally directed to a method of curing an ionic liquid epoxy mixture using an electromagnetic signal. First, an ionic liquid epoxy resin comprising ionic liquid epoxide monomers and, optionally, diluent epoxy resins and powdered fillers, is combined with a curing agent to form an ionic liquid epoxy mixture. The mixture is then applied as a coating onto a surface of a material. The coating is placed in contact with a second surface of the same material or a surface of another material. An electromagnetic signal, which in some instances is a microwave signal, is applied to the coating. Following application of the signal, the ionic liquid epoxide monomers polymerize and the mixture cures, adhering the surfaces together. Alternately, the epoxy mixture is applied to a surface and cured with microwaves to form a protective coating as in cladding or paint.

Abstract: The present invention relates to a method for the continuous production of low thermal conductivity endless filament yarns with a compact, homogeneous structural morphology. The presently disclosed methods utilize safe and recyclable ionic liquids to produce carbon fiber precursors from cellulose. The fibers are produced by the carbonization of cellulose carbon fiber precursors. The precursor fiber filaments have an increased tear resistance with simultaneously sufficient elongation, a round or crenulated cross-section, and homogeneous fiber morphology. The filament yarns exhibit performance characteristics similar to those produced from traditional viscose rayon. The resulting fibers are especially suited for aerospace applications in composite materials used at the limits of high temperatures, for instance in structures found in rocket nozzles or atmospheric reentry heat shields on spacecraft.

Abstract: The present invention relates to a method for the continuous production of low thermal conductivity endless filament yarns with a compact, homogeneous structural morphology. The presently disclosed methods utilize safe and recyclable ionic liquids (IL) to produce carbon fiber precursors from cellulose. The fibers are produced by the carbonization of cellulose carbon fiber precursors. The precursor fiber filaments have an increased tear resistance with simultaneously sufficient elongation, a round or crenulated cross-section, and homogeneous fiber morphology. The filament yarns exhibit performance characteristics similar to those produced from traditional viscous rayon. The resulting fibers are especially suited for aerospace applications in composite materials used at the limits of high temperatures, for instance in structures found in rocket nozzles or atmospheric reentry heat shields on spacecraft.