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Effect of Solvent on Porous PLA/HA Scaffolds Preparation Using Novel Solid H2O2 Porogen

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Abstract:

Hydroxyapatite/polymer scaffolds with proper biomechanical properties and stable 3-D porous structure were fabricated by combining gas foaming with solvent-casting/particle-leaching technique, in which novel solid H2O2 were used as a porogen. During the manufacturing process, we found that the porosity, compressive strength and microstructure of the composites are varied from each other while different solvents (dichloromethane, acetone, chloroform and 1,4-dioxane) were used. Porosities of the specimens increase from 72±5 to 87±5% in accordance with the increase of boiling point from 39.75 to 101.32 °C, while compressive strength decreased (4.8±0.7- 0.5±0.3 MPa). Interactions of HA/solvent and PLA/solvent together with evaporation dynamic tests of different solvents were investigated. The results show that the evaporation rate of the solvents is the most important factor affecting the final properties of the scaffolds.

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Periodical:

Key Engineering Materials (Volumes 342-343)

Pages:

49-52

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.342-343.49

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Online since:

July 2007

Authors:

Yi Wang, Hong Song Fan, Xian Tao Wen, Yu Mei Xiao, Zhong Wei Gu, Xing Dong Zhang

Keywords:

Gas Foaming, Hydroxyapatite (HAP), Macrostructure, Mechanical Property, Particle Leaching, Poly(lactic acid) (PLA), Porous Scaffold

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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