Low permeability biomedical polyurethane nanocomposites

Ruijian Xu, Evangelos Manias, Alan J. Snyder, James Runt

Research output: Contribution to journalArticlepeer-review

98 Scopus citations


In this article we describe our continuing research on a novel nanocomposite approach for reducing gas permeability through biomedical polyurethane membranes. Nanocomposites were prepared using commercially available poly(urethane urea)s (PUU) and two organically modified layered silicates (OLS). Wide-angle X-ray diffraction experiments showed that the silicate layer spacing in the nanocomposites increased significantly compared with the neat OLS, signifying the formation of intercalated PUU/OLS structures. The nanocomposite materials exhibit increased modulus with increasing OLS content, while maintaining polymer strength and ductility. Water vapor permeability was reduced by about fivefold at the highest OLS contents, as a result of PUU/inorganic composite formation.

Original languageEnglish (US)
Pages (from-to)114-119
Number of pages6
JournalJournal of Biomedical Materials Research - Part A
Issue number1
StatePublished - Jan 1 2003

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Biomaterials
  • Biomedical Engineering
  • Metals and Alloys


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