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AssigneesJnc Corporation, National Institute of Advanced Industrial Science and Technology
InventorsKazunori Ushimaru, Tokuma Fukuoka, Tomotake Morita
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There is provided a novel ionic composite material that can be molded into various shapes using lignin sulfonic acid as one of raw materials thereof, and having flexibility and elasticity, to significantly improve the strength and toughness and impart complete biodegradability thereto. It was found that a combination of ε-polylysine (ε-PL) which is a cationic polymer that is produced by microorganisms and lignin sulfonic acid exhibits excellent strength and toughness. In addition, ε-PL used in this technology is a biodegradable polymer that is completely degraded by microorganisms and the like in the environment. Since lignin sulfonic acid is also a biodegradable polymer, it is thought that a complex in which ε-PL and lignin sulfonic acid are mixed in this technology will exhibit complete biodegradability, and more applications thereof can be expected when utilizing the strength, durability, and biodegradability thereof in addition to the improved strength and toughness.
An ionic composite material comprising lignin sulfonic acid, its derivatives, or its salts, and ε-polylysine, its derivatives, or its salts, wherein a proportion of a total amount of lignin sulfonic acid, its derivatives or its salts and ε-polylysine, its derivatives or its salts in the entire ionic composite material is 50 to 97 weight %, and the content of water is 3 to 50 weight % of the entire ionic composite material.
Dependencies are inferred from the claim text.