 The study examined the mechanical properties of carbon fiber reinforced polymer composites enhanced with carbon nanofibers. It found that the composites with sycamine resin and 0.75 weight percent CNFs showed improved bending stress and bending stiffness compared to those without CNFs. Additionally, the composites with sycamine resin and 0.75 weight percent CNFs exhibited greater resistance to strain rate sensitivity than those without CNFs. Furthermore, the study found that the composites with sycamine resin and 0.75 weight percent CNFs were more resistant to environmental conditions such as hydrochloric acid, sodium hydroxide, water, and temperature than those without CNFs. Finally, the study concluded that the addition of CNFs did not improve the performance of the composites when exposed to aggressive environments. This article was authored by Paolo Santos, Abilio P. Silva, and Paolo N. Biris.