What is it about?
The biphasic properties of poly(vinyl alcohol) (PVA) freeze-thawing (FT) gel were largely changed after long immersion in water. So, the influence of changes in permeability and elastic modulus with aging of FT gel on friction and biphasic behaviors of PVA hydrogels as artificial cartilage was evaluated by biphasic finite element analysis.
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Why is it important?
Our study indicates that frictional behavior of PVA FT gels with aging can be improved by lowering of permeability with aging for FT gel. However, excessive hardening prevents the improvement. It is expected that hybrid gels as cast-drying (CD) on aged FT with appropriate elastic modulus can sustain superior low friction by the combination of high fluid load support and splendid surface lubricity.
Perspectives
This article is an extensive study of collaborative research project as “Elucidation of adaptive lubrication mechanism with low friction and minimum wear in natural synovial joints and development of artificial hydrogel cartilage with super lubricity based on bionic design”. In clinical application of artificial cartilage, the sustainability of superior lubricating ability of artificial cartilage with aging becomes important. It is expected that this study with biphasic analysis is effective in evaluation of hydrogel materials or devices for biomedical application.
Professor Emeritus Teruo Murakami
Kyushu University
Read the Original
This page is a summary of: Evaluation of influence of changes in permeability with aging on friction and biphasic behaviors of artificial hydrogel cartilage, Biotribology, June 2021, Elsevier,
DOI: 10.1016/j.biotri.2021.100178.
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