摘要
Developing epoxy resins (EP) simultaneously with high fire safety, mechanical strength and corrosion resistance using ammonium polyphosphate (APP) is imperative yet remains challenging, due to its limited flame-retardant efficiency, poor interfacial compatibility with the epoxy matrix, and lack of anti-corrosion ability. Although various sophisticated modifications of APP have been attempted to address this issue, the results remain unsatisfactory, and these modifications inevitably rely on auxiliary agents and complex procedures. Herein, a versatile ionic liquid, [DEA]D-ATA, readily synthesized via the neutralization of phosphoryl amitrole (D-ATA) and diethanolamine (DEA), serves as a curing agent, corrosion inhibitor, and flame-retardant synergist, and is demonstrated to simultaneously enhance the interfacial adhesion of APP within epoxy matrix via an in-situ cation exchange. Notably, the resulting [DEA]D-ATA/APP/EP composites exhibit significantly improved flame retardancy, reduced smoke release and toxic gases production, enhanced mechanical strengths and corrosion resistance relative to APP/EP cured by DEA. Specifically, the optimized [DEA]D-ATA/APP/EP attains a limiting oxygen index (LOI) of 31.8% and a UL-94 V-0 rating, with a peak heat release rate (pHRR) of 335.2 kW/m 2 and total smoke production (TSP) of 11.7 m 2 , while retaining a tensile strength of 65.9 MPa, an impact strength of 14.2 kJ/m 2 , and an impedance modulus |Z| 0.01 Hz of 10 6 Ω·cm 2 after 30-day immersion in 3.5 wt% NaCl solution. These results collectively demonstrate that this strategy effectively alleviates the performance degradation typically associated with APP-based flame-retardant epoxy composites. Overall, this ionic liquid-mediated synergistic approach, integrating interfacial regulation, fire safety enhancement, and corrosion resistance improvement, offers a straightforward and effective route to multifunctional high-performance EP composites.
危险品化学品经营许可证（带存储）