The viscoelastic response of electrospun poly(vinyl alcohol) mats.
Journal of the mechanical behavior of biomedical materials
MetadataShow full item record
Waheed, S., Butcher, A., & Oyen, M. (2018). The viscoelastic response of electrospun poly(vinyl alcohol) mats.. Journal of the mechanical behavior of biomedical materials, 77 383-388. https://doi.org/10.1016/j.jmbbm.2017.09.029
Native biological tissues are viscoelastic materials that undergo time-dependent loading in vivo. It is therefore crucial to ensure that biomedical materials have a suitable viscoelastic response for a given application. In this study, the viscoelastic properties of electrospun poly(vinyl alcohol) are investigated using tensile load relaxation testing. A five-parameter generalised Maxwell constitutive model is found to characterise the experimental response. The effect of polymer concentration and electrospinning voltage on model parameters is investigated in detail. The stiffness coefficients for the relaxation process appear to be dependent on the electrospinning conditions used whereas the time constants remain relatively unchanged. It is also observed that the stiffness parameters are linearly correlated with the equilibrium modulus, indicating that a single underlying material property dictates the relaxation moduli. Lastly, it is found that the viscoelastic model parameters are not predicted by the fibre diameter. These results provide an important understanding in designing electrospun mats with desired time-dependent properties.
Ethanol, Polyvinyl Alcohol, Polyvinyl Chloride, Polymers, Biocompatible Materials, Microscopy, Electron, Scanning, Materials Testing, Viscosity, Elasticity, Stress, Mechanical, Tensile Strength, Pressure
Embargo Lift Date
External DOI: https://doi.org/10.1016/j.jmbbm.2017.09.029
This record's URL: https://www.repository.cam.ac.uk/handle/1810/275230
Attribution 4.0 International
Licence URL: http://creativecommons.org/licenses/by/4.0/
Recommended or similar items
The following licence files are associated with this item: