Surface Modification of Carbon Nanotubes in Silicone–Polyurethane for Improved Mechanical and Anticorrosion Properties

Carbon nanotubes (CNT) were dispersed into homemade silicone–polyurethane (SPU) resin in order to enhance their mechanical and anticorrosion ability. Before mixing with SPU, CNT modified by four different approaches improve dispersion the surface of covered SiO2–TiO2 nanoparticles, -NH2 groups, epoxy groups or isocyanate respectively. The structures CNTs checked XRD, FTIR, SEM. After being SPU form a composite coating, one nanoparticles exhibited best properties chemical resistance (low water absorption), its corrosion current density (icorr) was only 9.246 × 10−9 A cm2, which is orders magnitude lower than icorr value coating unmodified (1.599 10−5 A/cm2). This may be because nanoparticle increased roughness surface, can resin.