Korea Institute of Science and Technology

Jee Won Choun

Yong Soo Kang

Jongok Won

Heung Yong Ha

In-Hwan Oh

Bum Suk Jung

Sangwook Choi

Bum-Suk Jung

An ion exchange composition membrane is made up of dispersed natural clay and/or organized clay in ion conducting polymeric film as a methanol barrier material. The membrane exhibits low methanol crossover, high proton conductivity and is thus suitable for use in direct methanol fuel cells with low costal advantage.

Proton exchange composite membranes, composite solutions, and method for manufacturing and fuel cell using the same

Disclosed is an inorganic-organic hybrid polymer composed of nano-particles on the surface using a dendrimer and a manufacturing method thereof, in which nanometer-sized inorganic (metal) particles are uniformly dispersed across the surface of the polymer and available as optically, electrically and magnetically functional materials. The method includes the steps of: forming a functional anhydride group on a polymer-based matrix; selectively adding metal or inorganic salts to the dendrimer to prepare either of dendrimer-metal precursor solution or dendrimer-inorganic particle solution; inducing the reaction between the functional anhydride group of the surface of polymer matrix with the solution to form a chemical bond between the matrix and the dendrimer; and reducing the metal ions or inorganic particle by irradiation of light.

Inorganic-organic hybrid polymers composed of nano-particles on the surface using dendrimers and manufacturing method thereof

Growing community of inventors

Seoul, South Korea

Jee Won Choun