Friction Properties of Poly(vinyl alcohol) Hydrogel: Effects of Degree of Polymerization and Saponification Value |
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| Authors: | Keisuke Mamada Vincent Fridrici Hiroyuki Kosukegawa Philippe Kapsa Makoto Ohta |
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| Affiliation: | 1.Graduate School of Biomedical Engineering,Tohoku University,Sendai,Japan;2.Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513,Ecole Centrale de Lyon,Ecully Cedex,France;3.Graduate School of Engineering,Tohoku University,Sendai,Japan;4.Institute of Fluid Science,Tohoku University,Sendai,Japan |
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| Abstract: | In this study, the friction of eight kinds of poly(vinyl alcohol) hydrogel (PVA-H) samples has been studied under various
load and velocity conditions to elucidate the effects of PVA factors such as the degree of polymerization (DP) and the saponification
value (SV) on the tribological behavior of PVA-H. Results showed the variations of the friction properties due to the PVA
factors in the two friction conditions found for the hydrogels: elastic friction and hydrodynamic lubrication. In the elastic
friction, the larger frictions were induced by the higher values of DP and SV. In the hydrodynamic lubrication, on the other
hand, PVA-Hs with lower SV showed larger friction. The results can then be used to adjust the parameters of PVA-H in order
to get given friction properties, for instance for the friction between catheter or scalpel and PVA-H, which can be used as
a biomodel material of artery or oral mucosa, for the training of surgeons. |
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