Bio- and Fossil-Based Polymeric Blends and Nanocomposites for Packaging: Structure⁻Property Relationship

Area of Science:

• Polymer Science and Engineering
• Materials Science
• Sustainable Packaging

Background:

• Biodegradable polymers offer environmental benefits but often require property modification for practical applications.
• Blending synthetic polymers with bio-based or biodegradable polymers is a strategy to enhance material characteristics and reduce costs.
• The focus is on blends where at least one component is bio-based or biodegradable, excluding fully bio-based blends.

Purpose of the Study:

• To review the potential of blending commodity and bio-based/biodegradable polymers for packaging.
• To analyze the functional behavior of these blends in packaging applications, including compostability and barrier properties.
• To investigate the impact of bio-based nanofillers on the properties of nanocomposite systems.

Main Methods:

• Literature review focusing on polymer blends for packaging.
• Analysis of blend properties: compostability, gas/water/light barrier, migration, and antioxidant performance.
• Investigation of bio-based nanofillers in synthetic and biodegradable polymer matrices.

Main Results:

• Blending synthetic polymers with biodegradable ones can modulate disintegrability rates and lower product costs.
• Functional properties such as barrier performance and antioxidant activity are significantly influenced by blend composition.
• Bio-based nanofillers can enhance the overall performance of nanocomposite systems.

Conclusions:

• Blending synthetic and bio-based/biodegradable polymers is a viable approach to develop advanced packaging materials.
• Careful selection of components and nanofillers allows for tailored properties for specific packaging needs.
• Further research into these blends can lead to more sustainable and cost-effective packaging solutions.