Effect of nano Ni/CNTs on thermal decomposition and combustion properties of AP/HTPB propellants

Nano Ni/CNTs composite catalyst was prepared by chemical liquid deposition.The morphology,microstructure and composition of nano Ni/CNTs were characterized by means of SEM,XRD and XPS.The catalysis of nano Ni/CNTs on thermal decomposition of AP and AP/HTPB propellant was investigated by means of DSC.The effects of nano Ni/CNTs on the burning rate and pressure exponent of AP/HTPB propellant were analyzed.The results show that nano Ni can be coated uniformly on the surface of CNTs,nano Ni/CNTs can make thermal decomposition peak temperature of AP and AP/HTPB propellant fall and total apparent decomposition heat increase obviously.In addition,it can improve burning rate and reduce pressure exponent of AP/HTPB propellant effectively.Under the same content,nano Ni/CNTs possesses the better catalytic property and positive synergistic effect compared with pure CNTs and nano Ni.