How does the inclusion of lignin from wood fibers affect the biodegradability of WPC tree boxes?

The inclusion of lignin from wood fibers significantly impacts the biodegradability of Wood-Plastic Composite (WPC) tree boxes. Lignin, a natural polymer found in wood, acts as a binding agent and contributes to the structural integrity of WPC. When incorporated into WPC formulations, lignin increases the material's organic content, making it more susceptible to microbial breakdown over time.

Studies show that lignin-rich WPCs decompose faster than traditional plastic-based composites, as microorganisms in soil can metabolize lignin alongside other organic components. This accelerates the degradation process, reducing environmental persistence. Additionally, lignin's hydrophobic properties balance moisture absorption, preventing premature decay while still allowing eventual biodegradation.

For urban landscaping, lignin-enhanced WPC tree boxes offer a sustainable alternative, combining durability with eco-friendliness. Their improved biodegradability aligns with circular economy principles, minimizing long-term waste in green infrastructure projects.