14 June 2024
MOF-based flame retardants: Progress and prospects

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Understanding MOF-based Flame Retardants: A Comprehensive Review

Metal-organic frameworks (MOFs) have emerged as a promising avenue for flame retardant research since their first introduction in 2017. These materials offer unique physicochemical properties that can be tailored through targeted design, making them versatile for various applications. However, challenges persist in enhancing the flame-retardant efficiency of MOFs and broadening their scope of use. Researchers are delving into innovative methods to address these issues, with a particular focus on coordination bond cleavage for structurally modifying MOFs.

Challenges and Progress in MOF-based Flame Retardants

The effectiveness of MOFs as standalone flame retardants is limited due to factors such as the presence of flammable ligands, low flame-retardant element content, and inefficient utilization of their microporous structure. To overcome these limitations, researchers are exploring post-synthesis strategies like ion exchange, ligand replacement, and acid/base etching. These approaches have expanded the potential applications of MOFs and paved the way for enhancing their flame-retardant properties.

Coordination Bond Cleavage: A Key Strategy for MOF Modification

A significant advancement in the field of flame retardancy involves the use of coordination bond cleavage to tailor the structure of MOFs. This method enables researchers to modify MOFs without disrupting their fundamental chemistry, leading to the development of efficient flame retardants. By strategically breaking coordination bonds, researchers can enhance the flame-retardant performance of MOFs and explore new avenues for functionalization in polymer nanocomposites.

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Future Prospects and Applications of MOF-based Flame Retardants

The future of MOF-based flame retardants looks promising, with ongoing research focusing on enhancing their structural properties and flame-retardant efficiency. Strategies such as template derivatization, ion/ligand exchange, and encapsulation offer novel ways to functionalize MOFs for improved flame retardancy. By leveraging the unique properties of MOFs, researchers aim to develop highly efficient flame retardant materials with diverse applications in polymer composites and beyond.

Links to additional Resources:

1. https://pubs.acs.org/doi/10.1021/acs.chemmater.2c02496 2. https://www.nature.com/articles/s41427-022-00478-x 3. https://onlinelibrary.wiley.com/doi/10.1002/adfm.202201663

Related Wikipedia Articles

Topics: Metal-organic frameworks, Flame retardants, Coordination bond cleavage

Metal–organic framework
Metal–organic frameworks (MOFs) are a class of porous polymers consisting of metal clusters (also known as SBUs) coordinated to organic ligands to form one-, two-, or three-dimensional structures. The organic ligands included are sometimes referred to as "struts" or "linkers", one example being 1,4-benzenedicarboxylic acid (BDC). More formally, a metal–organic...
Read more: Metal–organic framework

Flame retardant
The term flame retardant subsumes a diverse group of chemicals that are added to manufactured materials, such as plastics and textiles, and surface finishes and coatings. Flame retardants are activated by the presence of an ignition source and prevent or slow the further development of flames by a variety of...
Read more: Flame retardant

Dehydrohalogenation
In chemistry, dehydrohalogenation is an elimination reaction which removes a hydrogen halide from a substrate. The reaction is usually associated with the synthesis of alkenes, but it has wider applications.
Read more: Dehydrohalogenation

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