Korea Institute of Science and Technology

Hun-su Lee

Jaesang Yu

Min Su Park

Yong Chae Jung

Cheol-Min Yang

Junyeon Hwang

Eun Sil Lee

Jaewoo Kim

Un-Seok Jung

Yoonsang Kim

Seong Yun Kim

Yongchae Jung

Daun Lim

Yongseok Choi

In a plasma electrolytic oxidation apparatus and a method of plasma electrolytic oxidation using the plasma electrolytic oxidation apparatus, the plasma electrolytic oxidation apparatus includes a chamber and an electrode unit. The chamber is configured to receive an electrolyte. The electrode unit is configured to receive the electrolyte from the chamber and to treat an object with a plasma electrolytic oxidation treatment. The electrode unit includes an electrode, an enclosing part and a cover. The electrode is configured to receive a voltage from outside, and to form a receiving space in which the electrolyte is received between the electrode and the object. The enclosing part is configured to enclose a gap between the electrode and the object. The cover is configured to cover the electrode.

Plasma electrolytic oxidation apparatus and method of plasma electrolytic oxidation using the same

Disclosed is an ultrafine fiber including lignin, a carrier polymer and a carbon material. The ultrafine fiber, which includes lignin, can exhibit the properties of lignin such as antibacterial property, biodegradability, etc. Accordingly, it can be used widely in medical materials such as nanofiber, nanofiber web, nanofiber sheet, etc. for wound healing of the skin's dermal layer. Also, the ultrafine fiber can be used in sheath of electric cables because it contains a carbon material and has superior conductivity. In addition, because the ultrafine fiber can hold a large quantity of water, it can be used in various fields including sanitary pads for women, diapers for babies and adults, etc.

Lignin-containing coating composition and ultrafine fibers including the same

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Wanju-gun, South Korea

Hun-su Lee