@article {15321,
	title = {Alkaline treatments to render starch based biodegradable polymers self-mineralizable},
	journal = {Journal of Tissue Engineering and Regenerative Medicine},
	volume = {1},
	year = {2007},
	month = {2007-01-08 00:00:00},
	pages = {425-435},
	publisher = {Wiley Periodicals, Inc. J},
	abstract = {

The present research aims to develop a new route for surface functionalization of biodegradable polymers. The method is based on a wet chemistry modification, resulting in etching and/or hydrolysis in order to increase the amount of polar groups, such as hydroxyl (-OH) and carboxylic (-COOH) groups on the surface of the polymer. The polymer used as substrate was a corn starch-ethylene vinyl alcohol biodegradable blend (SEVA-C). For that purpose it was used in two different types of activation: (a) calcium hydroxide solution [Ca(OH)(2)] and (b) sodium hydroxide solution (NaOH). These treatments lead to the formation carboxylic acid-rich SEVA-C surfaces. Then, the samples were soaked in simulated body fluid (SBF) for different time periods of time until 7 days. After 1 day in SBF, the surface of SEVA-C was fully covered with spherulite particles. As the soaking time increased, the particles increased and coalesced, leading to the formation of a dense and uniform layer. Furthermore, thin-film X-ray diffraction confirms that the layer formed on the surface of the polymer was an apatite-like layer. These results suggest that this rather simple treatment is a good method for surface functionalization and subsequent mineral nucleation and growth on biodegradable polymeric surfaces to be used for bone-related applications. Copyright (c) 2008 John Wiley \& Sons, Ltd.

}, keywords = {apatite, bioactivity, biodegradable polymer, functional groups, simulated body fluid (SBF), starch-based polymers}, doi = {10.1002/term.54}, url = {http://onlinelibrary.wiley.com/doi/10.1002/term.54/abstract}, author = {Leonor, I. B. and Kim, H. - M. and Balas, F. and Kawashita, M. and Reis, R. L. and Kokubo, T. and Nakamura, T.} }

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