Abstract:
PURPOSE: An ion exchange composite membrane, its preparation method, a composite solution, and a fuel cell containing the membrane are provided, wherein the membrane intercepts methanol selectively without deterioration of the diffusion of hydrogen ions. CONSTITUTION: The ion exchange composite membrane comprises clay or organic clay dispersed into an ion conductive polymer film. Preferably the clay or organic clay is inserted into or coated on an ion conductive polymer film. The clay is at least one selected from the group consisting of pyrophylite-talc, smectite (montmorillonite), vermiculite, illite, mica and brittle mica group. The ion conductive polymer has at least one group selected from the group consisting of sulfonate, carboxylate, phosphate, imide, sulfonimide and sulfonamide, and is preferably nafion or sulfonated polystyrene-block-ply(ethylene-ran-butylene)-block-polystyrene. Preferably the fuel cell is a direct methanol fuel cell using methanol as a fuel.
Abstract:
본 발명은 분리능이 있는 수소 이온 교환 복합막, 복합 용액, 그 제조방법 및 이를 포함하는 연료전지에 관한 것으로서, 본 발명에 따른 이온 교환 복합막은 배리어 물질인 클레이 또는 유기화된 유기 클레이가 이온 전도성 고분자 필름에 분산되어 있는 구조를 갖고 있다. 이러한 이온 교환 복합막은 메탄올을 선택적으로 차단하면서도 수소 이온의 확산에 큰 저하가 없으며, 또한 비용면에서도 유리한 장점을 가지고 있다. 따라서, 본 발명의 이온 교환 복합막은 메탄올을 연료로 하는 직접 메탄올 연료전지에 유용하게 사용될 수 있다.
Abstract:
PURPOSE: A titanium based alloy for biomaterials is provided to replace an existing Ti-6Al-4V alloy for using as a safer biomaterials by not containing cytotoxicity indicated alloy elements, thereby having superior biocompatability, and replace pure titanium for using by having superior mechanical properties and corrosion resistance. CONSTITUTION: The titanium based alloy for biomaterials comprises 3 to 20 wt.% of In, 1 to 5 wt.% of Nb, 1 to 5 wt.% of Ta, 0.1 to 0.5 wt.% of Pd and a balance of Ti based on the alloy total weight.