In
this work, flowerlike nickel 2-methylimidazole metal–organic
framework (Ni-MOF) was prepared by a solvothermal method. Vertically
aligned Ni-MOF was fabricated from graphene oxide (GO) solution in
the same way. The combination of GO and Ni-MOF (GOF) obviously suppressed
the agglomeration of Ni-MOF sheets. As-synthesized, GOF has bigger
pore volume and specific surface area, which are beneficial for volatile
degradation products adsorption. It is noteworthy that the addition
of GOF obviously reduced the fire hazard of polystyrene (PS). More
than 33% decrease in the peak heat release rate for the PS/GOF composite
was obtained when the content of the additives is only 1.0 wt %. Meanwhile,
the reductions of total smoke and CO production were also prominent
during the combustion of PS/GOF, respectively 21% and 52.3% decreases
compared with that of pure PS. The synergism effects between layered
GO and porous Ni-MOF realized the improved performances of PS. Thus,
this work paves a feasible pathway to design efficient flame retardants
for enhancing fire safety of polymers
