Constructing 3D Polyphosphazene Nanotube@Mesoporous Silica@Bimetallic Phosphide Ternary Nanostructures via Layer-by-Layer Method: Synthesis and Applications

摘要: A novel ternary nanostructure polyphosphazene nanotube (PZS)@ mesoporous silica (M-SiO2)@bimetallic phosphide (CoCuP) was facilely fabricated, using PZS as the template, where large amount of cetyltrimethylammonium bromide molecules were anchored to via a similar layer-by-layer assembly strategy, and then uniform M-SiO2 shells can be formed successfully by Hyeon's coating method. Subsequently, three-dimensional (3D) on basis bimetallic interconnected with PZS@M-SiO2 synthesized convenient, mild hydrothermal route. It is noted that incorporating well-designed PZS@M-SiO2@CoCuP led significant decrease fire hazard thermoplastic polyurethane (TPU), is, 58.2% 19.4% reductions in peak heat release rate total release, respectively, well lower toxic hydrogen cyanide carbon monoxide yield accompanied higher graphitized char layer. In case TPU/PZS@M-SiO2@CoCuP system, storage modulus at -97 °C dramatically improved 62.6%, glass transition temperature shifted value, compared those pure TPU. The enhanced safety mechanical property for TPU composites ascribed tripartite cooperative effect from respective parts (CoCuP M-SiO2) plus PZS.