MAPP Compatibilized Recycled Woodchips Reinforced Polypropylene Composites with Exceptionally High Strength and...

Area of Science:

• Materials Science
• Sustainable Engineering

Background:

• Wood chips are abundant byproducts with limited low-value applications.
• There is a need for sustainable and cost-effective building materials to replace conventional options like Medium Density Fiber (MDF) boards and gypsum tiles.

Purpose of the Study:

• To develop and characterize polypropylene composites reinforced with untreated wood chips.
• To evaluate the impact of maleated polypropylene (MAPP) as a compatibilizer on the composite properties.
• To assess the potential of these composites as replacements for existing building materials.

Main Methods:

• Wood chips were used directly as reinforcement in polypropylene matrices.
• Composites were fabricated using compression molding, incorporating up to 90% wood chips.
• Maleated polypropylene (MAPP) was added at varying percentages (1-5% w/w) as a compatibilizer.
• Mechanical, acoustic, and thermal properties of the developed composites were investigated.

Main Results:

• Composites with up to 90% wood chip content were successfully produced.
• The addition of 5% MAPP resulted in up to a 300% increase in tensile properties.
• Composites exhibited superior tensile properties compared to commercial Medium Density Fiber boards and gypsum ceiling tiles.
• Thermal conductivity remained unchanged, while sound absorption decreased with MAPP addition.

Conclusions:

• Wood chip reinforced polypropylene composites, particularly with MAPP, demonstrate high performance.
• These composites offer a sustainable, eco-friendly, and low-cost alternative to conventional building materials.
• The utilization of wood waste in composite development promotes resource efficiency and circular economy principles.