Polysaccharide Composite Films Utilising Wood Waste

Area of Science:

• Materials Science
• Polymer Science
• Biotechnology

Background:

• Polysaccharide biopolymers offer sustainable alternatives to conventional plastics.
• Valorization of waste materials like wood dust is crucial for a circular economy.
• Investigating natural fillers can enhance biopolymer properties for diverse applications.

Purpose of the Study:

• To evaluate the impact of raw waste pine wood dust on starch-based biopolymer film properties.
• To characterize the mechanical, surface, barrier, and physical properties of the resulting biocomposites.
• To assess the suitability of these novel materials for industrial applications.

Main Methods:

• Biocomposite films were prepared using the casting method with varying percentages of pine wood dust (0-25%).
• Material characterization included composition analysis, particle size distribution, atomic force microscopy (AFM), contact angle goniometry, and uniaxial tensile testing.
• Barrier properties, water solubility index, and color were also evaluated.

Main Results:

• Increased wood dust content led to a higher Young's modulus and decreased maximum strain, indicating enhanced stiffness.
• Wood dust addition did not alter the hydrophilic surface properties of the films.
• Barrier properties, water solubility, and color were affected by the wood dust content.

Conclusions:

• Pine wood dust effectively modifies the functional parameters of polysaccharide biopolymer films.
• The resulting bio-sourced composites are non-toxic and environmentally neutral.
• These materials show potential for applications in the packaging and agriculture industries.