The preparation of size-controllable hollow polyimide microspheres by surface imidization of electrosprayed droplets

Jin Young Park, Hyun Min Jung, Yu Min Park, Byoung Gak Kim, Jong Chan Won, Haksoo Han, Yong Seok Kim

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5 Citations (Scopus)


Hollow polyimide (PI) microspheres are prepared through an electrospraying process, followed by surface imidization. The precipitation of droplets at the interface between two immiscible liquids provides a scaffold for the formation of a thin layer while an in situ imidization reaction prevents the irreversible deformation of the hollow shell. This strategy easily yields robust hollow structures of PI microspheres. The electrospray process permitts the sizes of the hollow PI microspheres to be controlled through adjustments to the flow rate and concentration of the poly(amic acid) (PAA) solution. The electrospraying approach described here may be the most facile means yet reported for obtaining size-controlled hollow PI particles without the need for additives or surfactants. Size-controllable hollow polyimide microspheres are prepared by surface imidization of electrosprayed droplets. A designed ES system is formulated based on certain solubility considerations, then a reactive system is applied using a thermal imidization reaction at the interfaces on droplet surfaces.

Original languageEnglish
Pages (from-to)424-429
Number of pages6
JournalMacromolecular Materials and Engineering
Issue number4
Publication statusPublished - 2014 Apr


All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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