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Yoshinori Katsuyama

Researcher at Hokkaido University

Publications -  13
Citations -  4133

Yoshinori Katsuyama is an academic researcher from Hokkaido University. The author has contributed to research in topics: Self-healing hydrogels & Microelectrode. The author has an hindex of 8, co-authored 13 publications receiving 3442 citations.

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Biomechanical properties of high-toughness double network hydrogels.

TL;DR: This study demonstrated that the PAMPS-PDMAAm DN gel has an amazing wear property as a hydrogel that is comparable to the UHMWPE and showed that the Cellulose-Gelatin DN gel was not resistant to wear.
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Structural Characteristics of Double Network Gels with Extremely High Mechanical Strength

Abstract: The dynamic aspect of double network (DN) gels showing an extremely high mechanical strength has been investigated by dynamic light scattering (DLS) measurements The DN gels are formed from highly cross-linked poly(2-acrylamido-2-methylpropanesulfonic acid) (PAMPS) as the first network and loosely cross-linked (or non-cross-linked) polyacrylamide (PAAm) as the second network The results of DLS show that the presence of slow mode besides the gel mode (fast mode) enhances the strength of DN gels at the low cross-linking density of the second network The dynamics of the slow mode cannot be explained in terms of reptational motion of the second component in the first network, but it is similar to the translational motion of PAAm polymers in a semidilute solution A strong velocity dependence of the mechanical strength is observed at a shear rate close to the inverse of the relaxation time of the slow mode These results suggest that large “voids” of the first network may exist, and PAAm polymers that exist
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Friction of gels

TL;DR: In this article, the sliding friction of various kinds of hydrogels has been investigated, and it has been found that the frictional behaviors of these fluids do not conform to Amonton's law F = μW, which well describes the friction of a solid.
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Elastic-hydrodynamic transition of gel friction.

TL;DR: The results indicate that the adsorption model proposed by the previous work is valid even under a pressure up to MPa orders, which is the order of pressure that a cartilage sustains in the articular joints.