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    Layer-by-Layer Assembly Fabrication of Porous Boron Nitride Coated Multifunctional Materials for Water Cleaning

    Year: 2017

    Journal: Adv. Mater. Interfaces, Volume 4, AUG 21

    Authors: Liu, Dan; Zhang, Mingwen; He, Li; Chen, Ying; Lei, Weiwei

    Organizations: Australian Research Council; Australian Research Council [DE150101617, DE140100716]; Deakin University

    Keywords: boron nitride nanosheets; flame-retardant; layer-by-layer; melamine sponges; oil absorption

    Cleanup of oil spills and industrial discharge of organic solvents is a global challenge. However, development of the ideal materials for water remediation with a high separation efficiency and low risk of fire is still rather sparse because the material needs to be superhydrophobic/superoleophilic and also flame-retardant. Here, a novel coating material of porous boron nitride nanosheets (BNNSs) and a layer-by-layer assembly technology for tailoring inexpensive cotton fabric and melamine sponge with these desired properties are reported. The BNNS-coated cotton fabric and melamine sponge exhibit high oil/water separation efficiency, selective absorption capacity of oil and organic solvents, and excellent recyclability. Furthermore, the coated materials show an efficient flame-retardant effect which completely stops melamine sponge melt dripping upon exposure to the direct flame from a butane blowtorch within 52 s. The integrated advantages of the high porosity, low water adhesion, compressibility, strong fire-resistance, simple operation, and commercial availability enable the porous BNNS-coated cotton fabric and melamine sponge to satisfy various practical oil/water separation requirements.
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