Paper Title:
Tailoring Mechanical Behavior of PVA-Bioactive Glass Hybrid Foams
  Abstract

Porous scaffolds have been developed in many forms and materials, but few have reached the combination of adequate physical, biological and mechanical properties. In previous works hybrid foams bioactive glass polyvinyl alcohol (PVA) were prepared by the sol-gel process for application as scaffold for bone tissue engineering. We observed that synthesis parameters such as PVA hydrolysis grade, PVA solution concentration, and PVA content in the hybrids affected both synthesis results and structural characteristics of the obtained foams. A marked change in foaming behavior occurs for PVA contents around 60%. In this work we analyze the effect of different compositions and synthesis parameters on the mechanical behavior of PVA-bioative glass foams. The compression tests showed that an increase of PVA fraction changes the mechanical behavior due to different mechanisms leading to cell collapse. For hybrids with lower PVA contents (20 to 30%) the cell collapse is due to brittle crushing. For intermediate polymer content (40-60%) the contribution of plastic yielding in the plateau region increases and it becomes the predominant mechanism of cell collapse for samples with higher polymer content (70-80%).

  Info
Periodical
Key Engineering Materials (Volumes 361-363)
Main Theme
Edited by
Guy Daculsi and Pierre Layrolle
Pages
289-292
DOI
10.4028/www.scientific.net/KEM.361-363.289
Citation
H. S. Costa, A. A. R. de Oliveira, R.L. Oréfice, H. S. Mansur, M. Pereira, "Tailoring Mechanical Behavior of PVA-Bioactive Glass Hybrid Foams", Key Engineering Materials, Vols. 361-363, pp. 289-292, 2008
Online since
November 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Marivalda Pereira, Najat Al-Saffar, Jamuna Selvakumaran, Larry L. Hench
Abstract:Hybrid bioactive glass-polyvinyl alcohol foams for use as scaffolds in tissue engineering were developed through the sol-gel route. Hybrids...
589
Authors: Marivalda Pereira, Showan N. Nazhat, Julian R. Jones, Larry L. Hench
Abstract:The possibility of enhancing mechanical properties by incorporation of polymeric components to sol-gel derived materials is extremely...
757
Authors: Peter Quadbeck, Günther Stephani, Kerstin Kümmel, Joerg Adler, Gisela Standke
Abstract:Open-celled metal foams were synthesized using a replication technique. Therefore a reticulated polyurethane template was coated by a slurry...
1005
Authors: Agda Aline Rocha de Oliveira, R.L. Oréfice, Herman S. Mansur, Marivalda Pereira
Abstract:Bioactive glass/polymer hybrids are promising materials for biomedical applications because they combine the bioactivity of these...
555
Authors: Wei Min Zhao, Hui Zhang, Hai Peng Li, Zhi Feng Wang, Yang Zhao, Rui Zhao, Bo Young Hur
Abstract:Using Al powder as thickening agent and CaCO3 powder as foaming agent, Al foams with above 85% porosity, pore sizes between 1mm and 4mm and...
70