Document Detail


Fabrication and characterization of hierarchically organized nanoparticle-reinforced nanofibrous composite scaffolds.
MedLine Citation:
PMID:  20691289     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Two different techniques were used to fabricate nanoparticle-reinforced nanofibrous scaffolds with different organizations of the minerals. First, a three-dimensional (3D) cylindrical nanofibrous scaffold made of poly-L-lactide and poly(L-lactide)/collagen (1:1) was fabricated using a modified electrospinning method. An alternating dipping method and a flow version of it were used to mineralize the 3D scaffolds. Flow mineralization was found to significantly improve the distribution of the mineral nanoparticles throughout the 3D nanofibrous scaffold, while mineral nanoparticles were found only on the periphery of the static mineralized scaffold. As a result of the mineral nanoparticle distribution, the compressive strength and modulus of the flow mineralized scaffold was found to be significantly greater than that of the static mineralized scaffold, despite having a lower mineral content. Energy-dispersive X-ray analysis and X-ray diffraction studies suggest that the mineral was composed of heterogeneous phases of calcium phosphates. This study demonstrates the importance of hierarchical and deliberate organization of the nanocomponents to optimize the mechanical properties, as is often found in nature.
Authors:
W E Teo; S Liao; C Chan; S Ramakrishna
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-08-04
Journal Detail:
Title:  Acta biomaterialia     Volume:  7     ISSN:  1878-7568     ISO Abbreviation:  Acta Biomater     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-11-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101233144     Medline TA:  Acta Biomater     Country:  England    
Other Details:
Languages:  eng     Pagination:  193-202     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Affiliation:
Department of Mechanical Engineering, National University of Singapore, Singapore. weeeong@yahoo.com
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