Introducing porosity into polyimide nanoparticles

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

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)


    Novel porous polyimides (PIs) having diameters of several hundred nanometers have been fabricated successfully from precursor poly(amic acid) (PAA) derivatives with poly(acrylic acid) (PAS) as the porogen, using a reprecipitation method and subsequent imidization. The superficial high porosity with deep pores was introduced when using a more compatible combination of PAA and the porogen, i.e., PI (BPDA-PDA) and PAS rather than PI (10FEDA-4FMPD and PAS); the pore sizes ranged from 20 to 100 nm. The resulting porous PI nanoparticles had thermally stabilities (determined from their 5% weight loss temperatures at 400 °C) similar to those of corresponding PI nanoparticles lacking porous structures. Microphase separation within the PAA nanoparticles after reprecipitation induced the porous surface structure, the properties of which were influenced by the molecular weight of PAS and the chemical structure of PAA. These unique porous PI nanoparticles have great potential for application as low-k materials in next-generation technologies.

    Original languageEnglish
    Pages (from-to)3171-3175
    Number of pages5
    JournalJournal of Nanoscience and Nanotechnology
    Issue number6
    Publication statusPublished - 2008 Jun 1


    • Low-K material
    • Poly(acrylic acid)
    • Polyimide
    • Porous nanoparticles
    • Reprecipitation method

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Biomedical Engineering
    • Materials Science(all)
    • Condensed Matter Physics


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