Abstract
A superhydrophobic and flame-retardant filter paper was prepared by a simple immersion process intended for effective oil-water separation. Superhydrophobicity and flame retardancy were achieved via a magnesium hydroxide (Mg(OH)2) nanostructure formed on the filter paper surface and subsequent polydimethylsiloxane (PDMS) treatment. The surface chemical composition, phase structure, morphology, and wettability of the as-prepared paper were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffractometry (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), and water contact angle (WCA) measurement. The as-prepared paper effectively separated both immiscible oil-water mixtures and oil-in-water emulsions while exhibiting good reusability and flame retardancy. Therefore, this study provided a simple method to prepare multifunctional filter paper, with promising potential applications in oily water treatment.
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