POS9-0796
Vanillin-Derived Polyimine Covalent Adaptive Networks with Self-Healing, Reprocessability, and Closed-Loop Chemical Recycling
Topic
S9. Polymer Technology for Sustainability
When and Where
Oct 1, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Jinkee HONG
Ki Su KIM
Presenter(s)
Chetna Tewari (Convergence Research Center for Recyclable Air mobility Materials and Platform, Korea Institute of Science and Technology (KIST))
Co-Author(s)
Abstract
The development of sustainable polymer materials requires network architectures that can maintain the mechanical robustness of thermosets while enabling repair, reprocessing, and end-of-life recovery. Covalent adaptive networks (CANs) have emerged as an attractive platform to address these challenges through the incorporation of dynamic covalent bonds. In this study, we report a series of bio-based polyimine networks derived from vanillin-based dialdehyde monomers and diamine crosslinkers. A family of vanillin-derived dialdehydes containing different alkyl spacer lengths was synthesized to investigate the influence of molecular structure on network properties. The resulting polyimines exhibited nearly complete self-healing at near-ambient temperatures, allowing recovery of structural integrity without external stimuli or harsh processing conditions. In addition to being efficiently reprocessed by hot pressing, the networks also demonstrated closed-loop chemical recycling capability through the selective depolymerization of the polymer matrix, enabling the high-efficiency recovery of the original building blocks. By combining renewable feedstocks, dynamic covalent chemistry, intrinsic self-healing, thermal reprocessability, and efficient monomer recovery, this work demonstrates a viable strategy for the development of circular polymer materials and sustainable covalent adaptive networks.
Keywords: Bio-based Polyimines, covalent adaptive network, self-healing, reprocessing, closed loop recycling.
Keywords: Bio-based Polyimines, covalent adaptive network, self-healing, reprocessing, closed loop recycling.
