Low permeability biomedical polyurethane nanocomposites
Low permeability biomedical polyurethane nanocomposites
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DOI：
10.1002/jbm.a.10377
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发表时间：
2003-01-01
影响因子：
4.9
通讯作者：
Runt, J
中科院分区：
文献类型：
--
作者：
Xu, RJ;Manias, E;Runt, J
在这篇文章中，我们描述了我们继续研究一种新的纳米复合材料的方法，通过生物医学聚氨酯膜降低气体渗透性。使用市售的聚（氨基甲酸酯脲）（PUU）和两种有机改性的层状硅酸盐（OLS）制备纳米复合材料。广角X-射线衍射实验表明，在纳米复合材料中的硅酸盐层间距显着增加相比，纯OLS，表明形成插层PUU/OLS结构。纳米复合材料表现出随着OLS含量增加而增加的模量，同时保持聚合物强度和延展性。水蒸气渗透率降低了约五倍，在最高的OLS含量，作为PUU/无机复合材料形成的结果。(C)2002 Wiley Periodicals，Inc.
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. (C) 2002 Wiley Periodicals, Inc.