Multiscale Interfacial Engineering of Ferric‐Ion‐Coordinated Polydopamine‐Coated Geopolymer Reinforced Epoxy/Polyurethane Adhesives for High Strength and Freeze–Thaw Durability
Structural adhesives used in wet–cold environments are vulnerable to moisture ingress, ice expansion, and thermal mismatch. Here, a low‐loading ferric‐ion (Fe 3+ )‐coordinated polydopamine (PDA)‐coated geopolymer (GP), denoted Fe 3+ ‐PDA@GP, was introduced into an epoxy/polyurethane (EP/PU) adhesive to construc...