Korea Institute of Science and Technology

Korea Land & Housing Corporation

Soon Jong Kwak

Seung Sang Hwang

Soon Man Hong

Kyung Youl Baek

Chong Min Koo

In Hwan Oh

Jae Ik Kim

Albert S Lee

In Wook Nah

He Seung Lee

Yeongmin Kim

Sang-Ick Choi

Seung Sock Choi

Han-Guen Ahn

Youngjong Sim

Daeseung Kyung

Disclosed are a carbon dioxide absorbent composition in which an N-alkylaminoalkanol; a polyhydroxyamine-based compound; and ethylenediamine and/or diethylenetriamine are mixed, a method for preparing the same, and a method and an apparatus for carbon dioxide absorption/separation using the same. Since the carbon dioxide absorbent according to the present disclosure has superior carbon dioxide absorption capacity and remarkably lower absorbent recycling temperature as compared to the existing absorbents such as monoethanolamine, etc., total energy consumption in the capturing process can be reduced greatly. In addition, since carbon dioxide is recovered at low recycling temperature, contamination by water or absorbent vapor may be prevented.

Highly efficient COabsorbent composition and method for preparing the same

Disclosed are a method for polymerizing polysilsesquioxane from a trialkoxysiloxane monomer, including: preparing an aqueous organic solution including a trialkoxysiloxane monomer, an organic solvent, water and a catalyst; and selectively preparing a polysilsesquioxane with a cage structure or a polysilsesquioxane with a ladder structure by adjusting the amount of the organic solvent or water in the aqueous organic solution, and a polysilsesquioxane with a cage structure or a polysilsesquioxane with a ladder structure prepared therefrom.

Method for preparing a polysilsesquioxane of a controlled structure and polysilsesquioxane prepared by the same

A monomer composition for polymerizing a branch-type silsesquioxane polymer is disclosed. The monomer composition includes hydroxy-substituted cyclic siloxane in a solvent, and the hydroxy-substituted cyclic siloxane includes stereoisomers of cyclic siloxane of cis, trans, random and twist structures at controlled ratios. Also disclosed are a branch-type silsesquioxane polymer synthesized by polymerizing the monomer composition for polymerizing a branch-type silsesquioxane polymer, and a method for synthesizing the same. In accordance with the disclosure, the isomers can be isolated stably at desired ratios. The isolated isomers may be polymerized into polymers of various types. Since the polymers exhibit low dielectric property, they may be utilized as low dielectric materials.

Composition comprising a monomer for polymerizing branch-type silsesquioxane polymer, branch-type silsesquioxane polymer synthesized from the same and a method for synthesizing the same

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Seoul, South Korea

Soon Jong Kwak