Transition metal-substituted polyoxometalate-ionic liquids with remarkable flame retardancy performance

Ying Zeng; Yeqin Feng; Junhao Zhang; Carsten Streb; Zhimin Wang; Hongjin Lv; Guo Yu Yang

doi:10.1039/d4mh00099d

Transition metal-substituted polyoxometalate-ionic liquids with remarkable flame retardancy performance

Ying Zeng, Yeqin Feng, Junhao Zhang, Carsten Streb^*, Zhimin Wang, Hongjin Lv^*, Guo Yu Yang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The development of effective and novel flame retardants has been attracting considerable attention in extenuating the fire threat of flammable polymer materials including the widely-used epoxy resins. In this work, we pioneeringly report the construction of transition-metal-substituted polyoxometalate-ionic liquids (tmsPOM-ILs) as effective flame retardants, which consist of tetra-metal-containing POMs ([M₄(H₂O)₂(PW₉O₃₄)₂]¹⁰⁻, M₄P₂, M = Ni, Cu) anions and tetra-n-heptylammonium [(n-C₇H₁₅)₄N⁺, THPA] cations. The resulting tmsPOM-ILs exhibited remarkably improved fire-safety of the epoxy resin (EP) matrix and even at a loading amount of as low as 3 wt%, the flame retardancy efficiency was even higher than that of commercial flame retardants (aluminum hydroxide (ATH), triphenyl phosphate (TPP), and decabromodiphenyl ethane (DBDPE)). Physicochemical and mechanistic studies revealed that the remarkable flame retardancy performance of the tmsPOM-ILs reported is due to their excellent epoxy matrix compatibility and remarkable catalytic charring ability. This work opens up a brand-new research direction of developing next-generation compatible and effective tmsPOM-based molecular flame retardants at the molecular level.

Original language	English
Pages (from-to)	3604-3612
Number of pages	9
Journal	Materials Horizons
Volume	11
Issue number	15
DOIs	https://doi.org/10.1039/d4mh00099d
Publication status	Published - 8 May 2024

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title = "Transition metal-substituted polyoxometalate-ionic liquids with remarkable flame retardancy performance",

abstract = "The development of effective and novel flame retardants has been attracting considerable attention in extenuating the fire threat of flammable polymer materials including the widely-used epoxy resins. In this work, we pioneeringly report the construction of transition-metal-substituted polyoxometalate-ionic liquids (tmsPOM-ILs) as effective flame retardants, which consist of tetra-metal-containing POMs ([M4(H2O)2(PW9O34)2]10−, M4P2, M = Ni, Cu) anions and tetra-n-heptylammonium [(n-C7H15)4N+, THPA] cations. The resulting tmsPOM-ILs exhibited remarkably improved fire-safety of the epoxy resin (EP) matrix and even at a loading amount of as low as 3 wt%, the flame retardancy efficiency was even higher than that of commercial flame retardants (aluminum hydroxide (ATH), triphenyl phosphate (TPP), and decabromodiphenyl ethane (DBDPE)). Physicochemical and mechanistic studies revealed that the remarkable flame retardancy performance of the tmsPOM-ILs reported is due to their excellent epoxy matrix compatibility and remarkable catalytic charring ability. This work opens up a brand-new research direction of developing next-generation compatible and effective tmsPOM-based molecular flame retardants at the molecular level.",

author = "Ying Zeng and Yeqin Feng and Junhao Zhang and Carsten Streb and Zhimin Wang and Hongjin Lv and Yang, {Guo Yu}",

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year = "2024",

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doi = "10.1039/d4mh00099d",

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AU - Zeng, Ying

AU - Feng, Yeqin

AU - Zhang, Junhao

AU - Streb, Carsten

AU - Wang, Zhimin

AU - Lv, Hongjin

AU - Yang, Guo Yu

PY - 2024/5/8

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N2 - The development of effective and novel flame retardants has been attracting considerable attention in extenuating the fire threat of flammable polymer materials including the widely-used epoxy resins. In this work, we pioneeringly report the construction of transition-metal-substituted polyoxometalate-ionic liquids (tmsPOM-ILs) as effective flame retardants, which consist of tetra-metal-containing POMs ([M4(H2O)2(PW9O34)2]10−, M4P2, M = Ni, Cu) anions and tetra-n-heptylammonium [(n-C7H15)4N+, THPA] cations. The resulting tmsPOM-ILs exhibited remarkably improved fire-safety of the epoxy resin (EP) matrix and even at a loading amount of as low as 3 wt%, the flame retardancy efficiency was even higher than that of commercial flame retardants (aluminum hydroxide (ATH), triphenyl phosphate (TPP), and decabromodiphenyl ethane (DBDPE)). Physicochemical and mechanistic studies revealed that the remarkable flame retardancy performance of the tmsPOM-ILs reported is due to their excellent epoxy matrix compatibility and remarkable catalytic charring ability. This work opens up a brand-new research direction of developing next-generation compatible and effective tmsPOM-based molecular flame retardants at the molecular level.

AB - The development of effective and novel flame retardants has been attracting considerable attention in extenuating the fire threat of flammable polymer materials including the widely-used epoxy resins. In this work, we pioneeringly report the construction of transition-metal-substituted polyoxometalate-ionic liquids (tmsPOM-ILs) as effective flame retardants, which consist of tetra-metal-containing POMs ([M4(H2O)2(PW9O34)2]10−, M4P2, M = Ni, Cu) anions and tetra-n-heptylammonium [(n-C7H15)4N+, THPA] cations. The resulting tmsPOM-ILs exhibited remarkably improved fire-safety of the epoxy resin (EP) matrix and even at a loading amount of as low as 3 wt%, the flame retardancy efficiency was even higher than that of commercial flame retardants (aluminum hydroxide (ATH), triphenyl phosphate (TPP), and decabromodiphenyl ethane (DBDPE)). Physicochemical and mechanistic studies revealed that the remarkable flame retardancy performance of the tmsPOM-ILs reported is due to their excellent epoxy matrix compatibility and remarkable catalytic charring ability. This work opens up a brand-new research direction of developing next-generation compatible and effective tmsPOM-based molecular flame retardants at the molecular level.

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Transition metal-substituted polyoxometalate-ionic liquids with remarkable flame retardancy performance

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