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Polyester fibers can be rendered calcium phosphate-binding by surface functionalization with bisphosphonate groups.
Journal of Biomedical Materials Research. Part A 2017 August
Fibers are often used as structural elements to improve the mechanical properties of materials such as brittle ceramic matrices by facilitating the dissipation of energy. However, this energy dissipation is mainly controlled by the interface between the two components, and a poorly designed fiber-matrix interface strongly reduces the efficacy of fiber reinforcement. Here, we present a versatile approach to control the affinity of biocompatible fibers to calcium-containing matrices to maximize the efficacy of reinforcement of calcium phosphates-based bioceramics by means of polymeric fibers. To this end, polyester fibers of tunable length were produced by electrospinning and aminolysis, followed by covalent attachment of alendronate, a bisphosphonate molecule with strong calcium-binding affinity, to the surface of the fibers. The proposed method allowed for selective control over the amount of alendronate conjugation, thereby improving the affinity of polyester fibers toward calcium phosphate bioceramics. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 2335-2342, 2017.
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