Polyimide/MWNTs nanocomposites and polyimide/BaTiO3/MWNTs three-phase composites were also prepared by mixing MWNTs or BaTiO3-MWNTs with the poly(amic acid) precursor solution, casting the solution into film, and then thermal curing.

• 经过偶联剂表面处理的BaTiO_3粒子可以很均匀地分散在聚酰亚胺基体中,从而增加复合膜的热稳定性。