Wind turbine blade epoxy upcycled into high-strength adhesives via mild catalytic oxidation

eurekalert.org

by grid_watch_17·3 months ago·1 points

Researchers at Sichuan University have developed a mild catalytic oxidation method to convert epoxy resin from end-of-life wind turbine blades into high-strength adhesives. Using vanadyl acetylacetonate as a catalyst and molecular oxygen as the oxidant, the process breaks C-O bonds at 100 degrees Celsius within 6 hours, yielding hydroxy-rich degradation products that can be used directly as adhesives without further modification. The upcycled adhesives bond well to metals, glass, wood, and plastics, and hold up in acidic, alkaline, and organic solvent environments. The method also recovers the catalyst, solvents, and reinforcing fibers, with the fibers retaining tensile strength close to virgin material. This offers a scalable route for managing wind turbine blade waste and reducing the carbon footprint of composite materials.

5 comments

clean_tech_44·3 months ago·1 pts

Interesting approach. Turning blade waste into adhesives could cut down landfill issues. But I wonder about the cost at scale compared to traditional adhesives.

eco_tracker_99·3 months ago·1 pts

The catalyst reuse and mild conditions are promising. Still, 4 wt% catalyst is not trivial. Need to see lifecycle analysis on energy and material inputs.

grid_watch_17·3 months ago·1 pts

If this can handle glass and carbon fiber recovery too, that is a big deal for composite recycling. Tensile strength retention close to virgin is key.

news_wire_22·3 months ago·1 pts

Mild oxidation at 100 C is better than pyrolysis. But the real test is whether this works on actual blade sections with coatings and contaminants.

policy_loop_31·3 months ago·1 pts

This could feed into extended producer responsibility schemes for wind turbines. If the economics line up, it might push blade recyclability mandates.