POS7-0774
Highly Aligned Dynamic Covalent Nanolaminates for Advanced Flame Retardancy
Topic
S7. Innovations in Polymeric Composites: From Design and Processing to Industrial Applications
When and Where
Sep 30, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Heesuk KIM
Jinhye BAE
Presenter(s)
Minjeong Shin (Department of Polymer Science and Engineering, Pusan National University)
Co-Author(s)
Abstract
Bio-inspired nacre-mimetic nanocomposites have attracted considerable attention for flame-retardant applications because highly aligned inorganic layers can effectively suppress mass transport and improve thermal resistance through barrier effects. However, although such layered architectures provide enhanced flame retardancy, they offer limited capability to actively dissipate thermal energy during fire exposure. Incorporating thermally responsive dynamic covalent networks presents an attractive strategy to introduce additional thermal-buffering functionality through reversible bond dissociation.
Herein, we report nacre-inspired nanocomposite film composed of highly aligned synthetic silicate nanosheets and a Diels–Alder (DA) based polymer network. Furan–maleimide and anthracene–maleimide adducts were incorporated into the organic matrix to introduce reversible covalent crosslinks, while the silicate nanosheets provided a long-range ordered laminated architecture.
The nanocomposite films were fabricated through solution-assembly and exhibited well-defined layered organization, as confirmed by SEM and XRD analyses. TGA analysis demonstrated enhanced thermal stability, characterized by delayed thermal degradation and increased residual mass compared with the corresponding organic matrix. During torch test, the aligned inorganic layers restricted the evolution of degradation products, whereas thermally activated retro-Diels–Alder reactions absorbed heat through endothermic bond dissociation. As a result, the nanocomposite films exhibited enhanced self-extinguishing behavior and delayed thermal propagation. This work highlights the potential of dynamic covalent nanolaminates as flame-resistant materials that combine barrier-driven protection with active thermal buffering to improve thermal stability and suppress fire propagation.
Herein, we report nacre-inspired nanocomposite film composed of highly aligned synthetic silicate nanosheets and a Diels–Alder (DA) based polymer network. Furan–maleimide and anthracene–maleimide adducts were incorporated into the organic matrix to introduce reversible covalent crosslinks, while the silicate nanosheets provided a long-range ordered laminated architecture.
The nanocomposite films were fabricated through solution-assembly and exhibited well-defined layered organization, as confirmed by SEM and XRD analyses. TGA analysis demonstrated enhanced thermal stability, characterized by delayed thermal degradation and increased residual mass compared with the corresponding organic matrix. During torch test, the aligned inorganic layers restricted the evolution of degradation products, whereas thermally activated retro-Diels–Alder reactions absorbed heat through endothermic bond dissociation. As a result, the nanocomposite films exhibited enhanced self-extinguishing behavior and delayed thermal propagation. This work highlights the potential of dynamic covalent nanolaminates as flame-resistant materials that combine barrier-driven protection with active thermal buffering to improve thermal stability and suppress fire propagation.
