Valorization of Cork Waste in Particleboards Production with Innovative Binder

Area of Science:

• Materials Science
• Sustainable Engineering
• Waste Valorization

Background:

• Global cork production exceeds 300,000 tons annually, with over 85% from Europe.
• A significant portion of cork waste (around 30%) is landfilled or used for low-value energy production, failing to utilize its potential.
• Cork's unique properties present an opportunity for valorization in higher-value applications like particleboard manufacturing.

Purpose of the Study:

• To assess the feasibility of producing novel particleboards from cork waste for construction, building, and furniture sectors.
• To develop and evaluate an innovative, environmentally friendly binder system for cork particleboards.
• To investigate the impact of this novel binder on particleboard properties, including hydrophobicity, density, thermal insulation, and mechanical performance.

Main Methods:

• Manufacture of novel particleboards using cork waste.
• Development of a new binder system comprising a diisocyanate and ammonium bicarbonate.
• Characterization of particleboard properties, focusing on hydrophobicity, density, thermal insulation, and mechanical strength.
• Analysis of material composition to achieve a balance between desired functionalities and performance.

Main Results:

• The novel binder, composed solely of solid components, simplified the mixing process compared to conventional resins.
• Particleboards exhibited increased hydrophobicity, reduced density, and enhanced thermal insulation performance.
• The use of inexpensive inorganic salts in the binder formulation reduced the required amount of diisocyanate.
• A trade-off was observed, with improvements in insulation and hydrophobicity accompanied by a deterioration in mechanical performance.

Conclusions:

• Cork waste can be effectively valorized into particleboards with desirable properties like enhanced hydrophobicity and thermal insulation.
• The novel binder system offers an innovative and potentially more sustainable alternative to conventional resins.
• Careful adjustment of material composition is crucial to achieve the optimal balance between density, mechanical properties, and other functionalities for specific applications.