Invention Reference Number
A novel approach enables the upcycling of polyethylene terephthalate (PET) waste into dynamically bonded vitrimer materials with superior recyclability and mechanical performance. By incorporating bio-based dynamic crosslinkers, these materials offer enhanced durability, high tensile strength and self-healing properties. The technology provides an alternative to traditional plastics, making it ideal for applications in advanced manufacturing, composites, and 3D printing while supporting circular economy initiatives.
Description
This innovative technology transforms PET waste into high-performance vitrimer materials by integrating bio-based dynamic crosslinkers with plastic waste-derived macromonomers. These vitrimers exhibit flame retardancy, impact resistance, healability and thermal reprocessability, allowing for efficient recycling and repair without performance degradation. Their dynamic covalent bonds enable chemical recyclability, providing an environmentally friendly alternative to conventional thermoset plastics. The material demonstrates excellent mechanical strength when incorporated into composite structures, including glass fiber – and carbon fiber – reinforced polymers, while also enabling the recovery of carbon and glass fibers at end-of-life. Additionally, the low glass transition temperature facilitates easy extrusion-based 3D printing, broadening its applicability across various industries.
Benefits
- Offers high mechanical strength, flame retardancy, and self-healing properties
- Supports lower-cost material development by upcycling plastic waste
- Enables efficient recycling and reusability without compromising performance
Applications and Industries
- Advanced composites: Enhances mechanical properties in aerospace, automotive, and construction applications
- 3D printing: Provides high-performance, recyclable materials for additive manufacturing
- Wearable electronics: Enables durable and flexible material solutions for next-generation devices
- Sealants and coatings: Demonstrates shock absorbing and self-healing behaviors for robust coatings and adhesives
- Structural additives: Contributes flame retardant behaviors for use as an additive in structural materials
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051.
