Enhanced the thermal conductivity of hydroxyl-terminated polybutadiene (HTPB) composites by graphene-silver hybrid

The heat conductivity affects the burning rate of propellant much, which would influence the properties of power propellant. In this work, hydroxyl-terminated polybutadiene (HTPB) was employed as a model propellant matrix, and series of composites were fabricated by introducing Graphene-Silver (GNs-Ag) hybrid as fillers to improve the heat conductivity of HTPB. GNs-Ag hybrids were prepared via chemical reduction of silver onto the graphene nanosheets, and the effect of preparation conditions on the fabrication of GNs-Ag were studied systematically. With the addition 0.5 wt% of GNs-Ag hybrid, the GNs-Ag/HTPB composites had a 52.6% increase in thermal conductivity compared with that of neat HTPB. The mechanical properties and thermal stability of the GNs-Ag/ HTPB nanocomposites were also sightly improved.

Automated summary

The addition of Graphene-Silver (GNs-Ag) hybrids as fillers significantly increased the thermal conductivity of HTPB, improving the mechanical properties and thermal stability of the composites.