For high strength purposes, however, other literature studies have established that much smaller carbon fiber diameters (typically less than 10 μm) are desired. For chemically modified kraft lignin, other studies have reported its blending with synthetic resins to increase the bio-derived component of matrices, or to reduce its Tg to enable melt blending [10]. However, carbon fibers produced from prior lignin-based studies in the literature have exhibited relatively low tensile properties, with published strengths of 660 MPa or lower