Graphene phosphonic acid as an efficient flame retardant
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- Graphene phosphonic acid as an efficient flame retardant
- Kim, Min-Jung; Jeon, In-Yup; Seo, Jeong-Min; Dai, Liming; Baek, Jong-Beom
- Issue Date
- AMER CHEMICAL SOC
- ACS NANO, v.8, no.3, pp.2820 - 2825
- We report the preparation of graphene phosphonic acid (GPA) via a simple and versatile method and its use as an efficient flame retardant. In order to covalently attach phosphorus to the edges of graphene nanoplatelets, graphite was ball-milled with red phosphorus. The cleavage of graphitic C-C bonds during mechanochemical ball-milling generates reactive carbon species, which react with phosphorus in a sealed ball-mill crusher to form graphene phosphorus. Subsequent opening of the crusher in air moisture leads to violent oxidation of graphene phosphorus into GPA (highest oxidation state). The GPA is readily dispersible in many polar solvents, including neutral water, allowing for solution (spray) coating for high-performance, nontoxic flame-retardant applications.
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