Hokkaido University

Ngk Spark Plug Company, Limited

Niterra Co., Ltd.

Takayuki Nonoyama

Jian Ping Gong

Takayuki Kurokawa

Shinjiro Kasahara

Masaya Iwata

Yong Woo Lee

Kumi Ota

The hydrogel includes a first network structure and a second network structure. The second network structure is entwined with the first network structure. The first network structure contains a polymer crosslinked with a first crosslinking agent. The second network structure contains a polymer crosslinked with a second crosslinking agent. 50 mol % or more of the first crosslinking agent does not contain a decomposable bond. 50 mol % or more of the second crosslinking agent does not contain a decomposable bond.

Hydrogel and method for producing hydrogel

A temperature-responsive hydrogel which contains a carboxyl group-bearing polymer and a divalent-metal salt of an organic acid is provided. The carboxyl group-bearing polymer may be a homopolymer of a carboxyl group-bearing monomer or a copolymer of a plurality of monomers including the monomer. A method for producing the temperature-responsive hydrogel involves immersing a carboxyl group-bearing polymer in an aqueous solution of a divalent-metal salt of an organic acid. The concentration of the divalent-metal salt of an organic acid in the aqueous solution may be 50 mM to the saturation concentration. It is possible to provide a temperature-responsive gel having an LCST with no volume phase transition and a method for producing the temperature-responsive gel.

Temperature-responsive gel having LCST with no volume phase transition, and production method therefor

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Sapporo, Japan

Takayuki Nonoyama