Water sorption behaviors of poly(propylene carbonate)/exfoliated graphite nanocomposite films

Dowan Kim, Insoo Kim, Jongchul Seo, Haksoo Han

Research output: Contribution to journalArticle

Abstract

In order to apply eco-friendly poly(propylene carbonate) (PPC) into barrier packaging materials, six different PPC/exfoliated graphite (EFG) nanocomposite films with different EFG were successfully prepared by a solution blending method. Their water sorption behavior was gravimetrically investigated as a function of the EFG content and interpreted with respect to their chemical structure and morphology. The water sorption isotherms were reasonably well fitted by Fickian diffusion model, regardless of morphological heterogeneities. With increasing the EFG content, the diffusion coefficient and water uptake decreased from 12.5 × 10-10cm2sec-1 to 7.2 × 10-10cm2 sec-1 and from 8.9 wt% to 4.2 wt%, respectively, which indicates that the moisture resistance capacity of PPC was greatly enhanced by incorporating EFG into PPC. The enhanced water barrier property of the PPC/EFG nanocomposite films with the high aspect ratio EFG makes them potential candidates for versatile packaging applications. However, to maximize the performance of the nanocomposite films, further researches are required to increase the compatibility of EFG in the PPC matrix.

Original languageEnglish
Pages (from-to)621-627
Number of pages7
JournalApplied Chemistry for Engineering
Volume24
Issue number6
DOIs
Publication statusPublished - 2013 Dec

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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