Phosphotungstic Acid Intercalated MgAlLa Ternary Layered Double Hydroxides as High-Efficiency Additives for Epoxy Resin: Synergistic Enhancement of Flame Retardancy and Smoke Suppression DOI Open Access
Wensheng Zhao, Jiao Jin,

Zhaoxu Guang

et al.

Coatings, Journal Year: 2025, Volume and Issue: 15(5), P. 523 - 523

Published: April 27, 2025

The inherent flammability and toxic smoke emission of epoxy resins (EPs) pose significant challenges to their advanced engineering applications. To address this limitation, we developed a novel flame-retardant additive through the organic modification layered double hydroxides (LDHs) using ternary MgAlLa hydrotalcite structure intercalated with phosphotungstic acid (PWA). This innovative design established synergistic mechanism by combining catalytic carbonization effect lanthanum radical scavenging capability PWA. optimized MgAlLa-PWA/EP composite demonstrated remarkable flame retardancy suppression improvements, exhibiting 77.9% 62.4% reductions in peak heat release rate (pHRR) total (THR), respectively, compared pure EP. Particularly noteworthy was 72.6% decrease (TSR), accompanied elevation limiting oxygen index (LOI) value 26.8% achievement UL-94 V-0 rating. Microstructural analysis revealed that modified formed continuous uniform layer increased density during combustion, effectively inhibiting exchange, diffusion, transfer. study provides strategy for designing multi-element LDHs high-efficiency

Language: Английский

Phosphotungstic Acid Intercalated MgAlLa Ternary Layered Double Hydroxides as High-Efficiency Additives for Epoxy Resin: Synergistic Enhancement of Flame Retardancy and Smoke Suppression DOI Open Access
Wensheng Zhao, Jiao Jin,

Zhaoxu Guang

et al.

Coatings, Journal Year: 2025, Volume and Issue: 15(5), P. 523 - 523

Published: April 27, 2025

The inherent flammability and toxic smoke emission of epoxy resins (EPs) pose significant challenges to their advanced engineering applications. To address this limitation, we developed a novel flame-retardant additive through the organic modification layered double hydroxides (LDHs) using ternary MgAlLa hydrotalcite structure intercalated with phosphotungstic acid (PWA). This innovative design established synergistic mechanism by combining catalytic carbonization effect lanthanum radical scavenging capability PWA. optimized MgAlLa-PWA/EP composite demonstrated remarkable flame retardancy suppression improvements, exhibiting 77.9% 62.4% reductions in peak heat release rate (pHRR) total (THR), respectively, compared pure EP. Particularly noteworthy was 72.6% decrease (TSR), accompanied elevation limiting oxygen index (LOI) value 26.8% achievement UL-94 V-0 rating. Microstructural analysis revealed that modified formed continuous uniform layer increased density during combustion, effectively inhibiting exchange, diffusion, transfer. study provides strategy for designing multi-element LDHs high-efficiency

Language: Английский

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