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Bioactivity and Viscoelastic Characterization of Chitosan/Bioglass® Composite Membranes
Author(s) -
Caridade Sofia G.,
Merino Esther G.,
Alves Natália M.,
Mano João F.
Publication year - 2012
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.201200036
Subject(s) - membrane , apatite , simulated body fluid , viscoelasticity , chitosan , composite number , dynamic mechanical analysis , composite material , materials science , chemical engineering , modulus , immersion (mathematics) , chemistry , mineralogy , scanning electron microscope , polymer , mathematics , biochemistry , engineering , pure mathematics
Membranes of chitosan (CTS) and composite membranes of CTS with bioglass are prepared by solvent casting. The composite membranes are shown to induce the precipitation of apatite upon immersion in SBF. The biomineralization process is followed by measuring the variation of the viscoelastic properties of the membranes immersed in SBF, both online and offline. Non‐conventional DMA is used to measure the change in the storage modulus, E ′, and the loss factor, tan δ , as a function of the immersion in SBF. A simple model is used to estimate the E ′ of the apatite layer formed in vitro that is about 130 MPa. This work shows that innovate mechanical tests can be useful to characterize the mechanical performance of composites under physiological conditions.