A novel stearic-pillared MgAl layered double hydroxide (S-Mo/LDH) containing MoO_x nanoparticles was successfully prepared by calcination-reconstruction, where MoO_x nanoparticles were decorated onto the surface of the S-Mo/LDH by reducing the MoO₄²⁻-pillared LDH precursor (Mo-LDH). The microstructures, bonding states and surface properties were investigated by XRD, SEM, FT-IR, BET/BJH, WAC and TG-DTG, which confirmed that the interlayer MoO₄²⁻ anion was grafted onto the brucite sheets to form MoO_x nanoparticles during the calcination process of the Mo-LDH, and stearic anions were intercalated into the interlayers of the S-Mo/LDH. The performances of the flame-retardancy were improved by combining these properties of the individual materials of stearic, parent LDH and MoO_x nanoparticles. In comparison to the Mo-LDH, the S-Mo/LDH demonstrated a more homogeneous dispersion in polypropylene (PP) matrix due to surface hydrophobicity. The incorporation of the S-Mo/LDH filter at 20 g∙100 g⁻¹ loading provided an excellent fire resistance towards PP matrix, giving the high limited oxygen index (28.6%), vertical burning UL94 (V-0) and reduced total heat release (71.6% reduction in PHRR relative to neat PP). These remarkable properties indicated that the approach to improve flame retardancy of PP was a cost-effective, feasible and highly effective way.

通过煅烧-重构成功地制备了一种新型的含有MoO _x纳米颗粒的硬脂柱状MgAl层状双氢氧化物（S-Mo / LDH），其中通过还原MoO ₄ ²将MoO _x纳米颗粒装饰在S-Mo / LDH的表面^--柱状LDH前体（Mo-LDH）。通过XRD，SEM，FT-IR，BET / BJH，WAC和TG-DTG对微观结构，键合状态和表面性能进行了研究，证实了层间MoO ₄ ^2-阴离子被接枝到水镁石板上形成了MoO _x。Mo-LDH的煅烧过程中会形成纳米颗粒，而硬脂酸阴离子会插入S-Mo / LDH的中间层中。通过组合硬脂酸，母体LDH和MoO _x纳米颗粒的各个材料的这些性能，提高了阻燃性能。与Mo-LDH相比，由于表面疏水性，S-Mo / LDH在聚丙烯（PP）基质中表现出更均匀的分散性。以20 g∙100 g ^-1的比例包含S-Mo / LDH过滤器负载可为PP基体提供出色的耐火性，从而具有较高的极限氧指数（28.6％），垂直燃烧UL94（V-0）和减少的总热量释放（相对于纯PP而言，PHRR降低了71.6％）。这些卓越的性能表明，提高PP阻燃性的方法是一种经济有效，可行且高效的方法。