Abstract:
The present invention relates to a method for drying graphene oxide slurry containing moisture, which is very soft and deformable, without defects. It is known that graphene oxide slurry contains a large amount of moisture and it is difficult to remove the moisture without structural defects. Formerly, graphene oxide slurry is heated at 80-100 °C for long time and moisture is removed by a vacuum pumping method but it causes severe problems in the physical properties of graphene oxide such as the dissociation of oxide groups on the surface of graphene oxide and partial graphitization by the offset of graphene plates. It makes graphenes with bad physical properties. The core of the present invention is that a freezing drying method is applied in a slurry-drying process to remove moistures without structural defects on graphene oxide. By the present invention, the storage and the transportation of the of a large amount of graphene oxide are facilitated without the deterioration of physical properties of the graphene oxide and it would have a wide range of applications in other products. [Reference numerals] (AA) Heat-drying; (BB) Freeze-drying
Abstract:
PURPOSE: A high intensity carbon complex using graphene, a method for manufacturing the same, and a fuel cell separator using the same are provided to improve the dimension precision, the intensity, the chemical resistance characteristic of the separator. CONSTITUTION: Graphene, graphene oxide, or the mixture of the same; cokes; and a resin binder are mixed to form a mixture. The mixture is shaped into a shaped body. The shaped body is carbonated. The content of the graphene, the graphene oxide, or the mixture of the same is 0.5 to 10 weight% based on the total weight of the mixture. Alcohol is further mixed into a mixture forming process. The alcohol is methanol. The content of the alcohol is 100 to 150 volume ratio based on the total volume of the mixture.
Abstract:
본 발명은 기상의 TiO 2 를 전극에 고속으로 분사 증착시키는 드라이 프로세스로 TiO 2 후막을 형성시키는 단계를 주공정으로 한 염료감응형 태양전지(DSSC) 제조 방법에 관한 것이다. 본 발명은 (a) 기판을 준비하고, 직경이 50nm이하인 TiO 2 분말을 마련하는 단계; 및 (b) 상기 TiO 2 분말을 150~600m/s의 속도로 상기 기판에 분사 증착시켜 1~30㎛ 두께의 TiO 2 후막을 형성시키는 단계; 및 (c) 상기 TiO 2 후막에 염료를 침투시키는 단계; 를 포함하는 드라이 프로세스에 의한 염료감응형 태양전지 제조방법을 제공한다.
Abstract:
전이 금속의 양극 산화에 의해 제조된 벌크형 나노 다공성 금속산화물을 제공하는 단계; 및 반응 용기에서 상기 벌크형 나노 다공성 금속 산화물을 촉매로 반응물을 반응시키는 단계를 포함하는 것을 특징으로 하는 촉매 반응 방법이 개시된다. 본 발명은 반응기 일체형 촉매를 제조 가능하게 하고, 촉매가 반응기와 일체된 상태로 반응에 직접적으로 참여함으로써 반응 종료 후 기존 분말형 촉매 공정에서 요구되는 촉매제거 공정 (여과 공정 혹은 원심분리 공정) 없이 생성물을 직접적으로 얻어낼 수 있다. 반응기 일체, 양극산화, 무여과, 전이금속 촉매
Abstract:
PURPOSE: A carbon nano-tube coating structure is provided to improve the plain conductivity by inducing direct chemical bonds between carbon nano-tube and a substrate and between the carbon nano-tube and the carbon nano-tube. CONSTITUTION: A carbon nano-tube coating structure forms direct bonds between carbon nano-tube(10) and a substrate and between the carbon nano-tube and the carbon nano-tube without a binder and a catalyst. A bending part(11) is formed at the end part or the body part of the carbon nano-tube. A direct bond is formed by accelerating the carbon nano-tube at 340-1000m/sec and being collided to the substrate based on an aerosol deposition method.