One-pot In Situ Synthesis of Hollow Layered Double Hydroxide–Ammonium Polyphosphate Nanoshells toward Flame Retardant

A novel approach to synthesize nanostructure composites of layered double hydroxide–ammonium polyphosphate (LDH–APP) is reported. hollow LDH–APP nanoshells were synthesized by simply mixing precursor solutions and systematically characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and Brunauer–Emmett–Teller (BET) techniques. The as-fabricated LDH–APP–PP (polypropylene) composites using hollow LDH–APP nanoshells as nanofiller show excellent flame-retardant performance, which is much better than that of LDH–PP. It is expected that such a kind of LDH–APP composite materials may have potential applications in the field of industrial flame-retardant.