ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Porous scaffolds have been developed in many forms and materials, but few havereached the combination of adequate physical, biological and mechanical properties. In previousworks hybrid foams bioactive glass polyvinyl alcohol (PVA) were prepared by the sol-gel processfor application as scaffold for bone tissue engineering. We observed that synthesis parameters suchas PVA hydrolysis grade, PVA solution concentration, and PVA content in the hybrids affectedboth synthesis results and structural characteristics of the obtained foams. A marked change infoaming behavior occurs for PVA contents around 60%. In this work we analyze the effect ofdifferent compositions and synthesis parameters on the mechanical behavior of PVA-bioative glassfoams. The compression tests showed that an increase of PVA fraction changes the mechanicalbehavior 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 predominantmechanism of cell collapse for samples with higher polymer content (70-80%)
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.289.pdf
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