Characterization of composite materials with recycled wind turbine blade additives using atomic force microscopy

The European Union's efforts to increase the share of renewable energy translate into a growing number of wind farms. Post-operation wind turbines become increasing waste. Recycling wind turbine blades is a challenge due to the materials used (composites) and high costs. The article examines the influence of recyclate from wind turbine blades (derived from mechanical recycling) on the image of topography and Lateral Force Microscopy (LFM) in atomic force microscopy (AFM). Upon adding the recycled material, an increase in surface roughness is observed despite its prior polishing. The Young's modulus determined from force spectroscopy (AFM mode) indicated a small difference in values between the matrix and reinforcement areas. This proves the significant influence of the primary and secondary interphase on the properties of secondary composites, which is an area for further research.