Functional Starch-Based Biopolymer Coatings for Sustainable Packaging Applications

Area of Science:

• Materials Science
• Biopolymer Engineering
• Sustainable Chemistry

Background:

• Synthetic polymer coatings in the graphics industry present environmental challenges due to non-biodegradability.
• Starch, an abundant biopolymer, is a potential alternative but suffers from poor mechanical properties.
• Developing functional, stable, and biodegradable coatings is crucial for environmental sustainability.

Purpose of the Study:

• To investigate the functional properties of starch-based biopolymer coatings.
• To evaluate the impact of D-sorbitol and bioactive components (trans-ferulic acid, L-ascorbic acid) on coating performance.
• To assess the mechanical stability and UV protection capabilities of enhanced starch coatings.

Main Methods:

• Starch-based coatings were formulated with D-sorbitol and bioactive compounds.
• Mechanical properties were assessed using tensile strength, elongation at break, burst strength, and folding endurance.
• UV protection was evaluated by monitoring the color change of thermochromic pigments using spectrophotometric analysis after UV irradiation.

Main Results:

• The addition of D-sorbitol and bioactive components significantly improved the mechanical properties of starch-based coatings.
• Coatings demonstrated enhanced burst strength and folding endurance.
• UV protection potential was quantitatively assessed, indicating improved performance with additive combinations.

Conclusions:

• Starch-based biopolymer coatings enhanced with D-sorbitol and bioactive components offer improved mechanical stability and UV protection.
• These enhanced coatings represent a promising biodegradable alternative to synthetic polymers in the graphics industry.
• The study highlights the potential of functionalizing biopolymers for demanding industrial applications.