Anomalous polyimide nanoparticles prepared from blending of unlike polymers

Gufan Zhao, Takayuki Ishizaka, Hitoshi Kasai, Masatoshi Hasegawa, Hachiro Nakanishi, Hidetoshi Oikawa

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Anomalous polyimide (PI) nanoparticles with controllable morphology, i.e., porous hollow structures, hollow structures, or bowl-like structures, were fabricated by blending a second polymer with poly(amic acid) (PAA, the precursor of PI) through the reprecipitation method and subsequent imidization. The phase separation between PAA and the porogen induced the formation of various hollow PI nano-particles. The hollow morphology was mainly affected by the compatibility/ interaction between PAA and the porogen. Hollow PI nanoparticles with superficial pores (ca. 30 nm), smooth surface, or holes in their surfaces can be obtained by selecting a suitable porogen, respectively.

Original languageEnglish
Pages (from-to)9-17
Number of pages9
JournalMolecular Crystals and Liquid Crystals
Issue number1
Publication statusPublished - 2009 Jan 1


  • Bowl-like nanoparticles
  • Hollow nanoparticles
  • Polyimide
  • Polymer blend
  • Porous hollow nanoparticles
  • Reprecipitation method


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