Abstract
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 language | English |
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Pages (from-to) | 431-435 |
Number of pages | 5 |
Journal | Macromolecular Research |
Volume | 22 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2014 Apr |
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry