Water sorption behavior in polyimide thin films controlled by inorganic additives

Jinuk Kwon, Jinyoung Kim, Dongmyung Park, Jongchul Seo, Patrick Han, Haksoo Han

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We investigated the decreased water diffusivity depending on the content and size of carbon black (CB) added to polyimide (PI) in order to synthesize composite films (PI-CB). CBs with different diameters were used: N110 (CB1, 11-19 nm), N326 (CB2, 26-30 nm) and N660 (CB3, 49-60 nm). The water diffusion coefficient of PI-CB decreased with increasing CB content from 2.67·10-9 for pure PI films to 0.22·10-9 cm2/s for PI-CB films containing 40 wt% CB1. Moreover, the decrease in water diffusivity with increasing CB content exhibited a linear relationship. The water diffusivity of PI-CB increased with the increasing size of CB at the same CB content. The water uptake of PI-CB had a linear relationship depending on the CB content, similar to water diffusivity; the water uptake of composite films decreased by 73% (from 3.67% to 0.98%) for PI-CB1 (40 wt%) films as compared to PI films. In addition, the water uptake varied not only with the CB content, but also by the size of the CB surface area. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)431-435
Number of pages5
JournalMacromolecular Research
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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