✦ LIBER ✦

Low permeability biomedical polyurethane nanocomposites

✍ Scribed by Xu, Ruijian ;Manias, Evangelos ;Snyder, Alan J. ;Runt, James

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 115 KB
Volume: 64A
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.a.10377

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✦ Synopsis

Abstract

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. © 2002 Wiley Periodicals, Inc. J Biomed Mater Res 64A: 114–119, 2003

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