Fabricating high thermal conductivity rGO/polyimide nanocomposite films via a freeze-drying approach.

ABSTRACT: The preparation of polymeric composite materials with low filler content as well as high thermal conductivity has been an important subject for the field of polymer material research. During our recent investigation on polyimide (PI), it was found that poly(amic acid) (PAA) solution (in dimethylacetamide, DMAc) could crystallize at low temperature. When adding reduced graphene oxide (rGO) as the thermal conductive fillers in the PAA solution, it was also found that the crystallization process of PAA would impel the rGO to rearrange in order and form an aligned thermal conductive network. To retain the rGO network structure, the freeze-drying technique was used to remove the solvent. Subsequently, through a thermal imidization process the final rGO/PI films containing a 3D rGO network could

SUBMITTER: Wei S 

PROVIDER: S-EPMC9081100 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature