The concept of using carbon black (CB), a by-product of the pyrolysis of methane and biomass, was sparked by the growing interest in producing sustainable composites. CB finds versatile applications among which it can serve as an adsorbent in wastewater treatment, but faces challenges due to its low dispersibility, caused by low surface polarity and agglomeration. Surface functionalization is a common approach to enhance material polarity. Silanes are typically coupled to carbon´s surface to alter its chemistry by serving as coupling agents which are forming bridges between an inorganic material (carbon) and a polymer matrix (e.g., epoxy). This work focuses on the modification of the surface of carbon black (CSC), employing amino- and glycidoxyorganosilanes (APTMS and GPTMS). The process includes (1) solvothermal and plasma oxidation of CB, followed by (2) a reduction using lithium aluminium hydride (LiAlH4). This yields a transformation of C=O to -OH groups that can react with organosilanes and create stable Si-O-C bonds. The modified carbon black was characterized and used in the production of composites with bisphenol-A-diglycidyl ether (BADGE), where the resin acted as a binder for the carbon particles. The mechanical properties of these composites were assessed.