Sk Innovation Co., Ltd.

Korea Research Institute of Chemical Technology

Simon MoonGeun Jung

Sang Min Lee

Laura Ruohonen

Anne Huuskonen

Jeong Hoon Kim

Bong Jun Chang

Su Young Moon

Outi Koivistoinen

Marja Ilmén

Merja Oja

Jae Hoon Jo

Chae Young Park

Hoon Moh Seong

The present invention relates to a BCDA-based semi-alicyclic homo- or co-polyimide membrane material for gas separation and a preparation method thereof. The polyimide material prepared according to the present invention has high solubility in casting solvents, particularly in polar organic solvents, by interrupting asymmetry in the polyimide chain structure and formation of polyimide complexes compared with aromatic polyimides, and has higher heat resistance than the conventional aromatic polyimides and aliphatic polyimides, so that it is useful for the process of a high-selective permeable composite membrane or a asymmetric hollow fiber membrane used for commercial purposes, suggesting that it can be effectively used as a membrane for gas separation in various fields. In addition, the polyimide material membrane for gas separation of the present invention is useful because it has superior gas separation properties to the conventional commercialized aromatic polyimides or semi-alicyclic polyimides.

BCDA-based semi-alicyclic homo- or co-polyimide membrane materials for gas separation and the preparation method thereof

Provided are a novel isoprene synthase derived from sweet potato and a method of preparing isoprene using the same, and more specifically, a novel isoprene synthase derived from sweet potato, a gene encoding the isoprene synthase, a host cell transformed with the gene, and a method of preparing isoprene using the same. The isoprene synthase of the present invention may have higher isoprene productivity as compared to isoprene synthases known in the related art to thereby be effectively used in isoprene biosynthesis and preparation of an isoprene polymer using the same.

Isoprene synthase and method of preparing isoprene using thereof

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Daejeon, South Korea

Simon MoonGeun Jung