Abstract:
본 발명은 대량 생산에 적합하고 제조비용을 절감할 수 있는 연료전지용 합금 촉매를 제조하는 방법에 관한 것으로서, 2이상의 촉매 전구체를 별도의 기화기에서 기화시키는 단계; 기화된 2이상의 촉매 전구체를 서로 접촉시키지 않고 반응기에 공급하는 단계; 및 상기 반응기에서 합금 촉매를 합성하는 단계를 포함하여 구성된다. 본 발명의 연료전지용 합금촉매 제조방법은, 종래의 복잡한 다단계의 촉매 제조방법에 비하여 단일 반응공정으로 합금 촉매를 제조할 뿐만 아니라 종래의 합금 제조 공정에 비하여 현저히 낮은 온도에서 합금을 형성함으로써, 대량생산에 적합하며 공정비용을 절감할 수 있는 효과가 있다. 또한, 본 발명에 따라 제조된 합금 촉매 입자는 기존의 방법으로 제조된 촉매에 비하여 크기가 나노 단위로 현저하게 작기 때문에, 반응 활성점의 수가 크게 향상되어 나노화에 따른 촉매 원가를 절감할 수 있고, 금속 촉매와 지지체 간의 상호작용이 증가하여 내구성이 향상되는 등의 다양한 효과를 얻을 수 있다.
Abstract:
The purpose of the present invention is to directly synthesize a high quality carbon nanothin film consisting of without a separate assembly process crystalline nanomaterials (carbon nanotube or carbon nanofiber) of nanosize. The present invention for accomplishing the purpose forms a carbon nanothin film on a prepared metal plate by using a chemical vapor deposition method and performs heat treatment on the synthesized metal support-carbon nanothin film at high temperatures and high pressures under hydrogen. The present invention is able to coat the surface of metal supports prepared for forming a structure of a hybrid form with metal and metal oxide nanoparticles in advance. The synthesis method of the present invention simplifies a manufacturing process as compared to a thin film manufactured by using carbon nanomaterials (carbon nanotube or carbon nanofiber) synthesized in advance, is able to control the uniform thickness of a film and is able to freely adjust the crystal structure of the carbon nanothin film synthesized through a simple heat treatment process. The structure is able to be applied to materials for various electrodes, catalyst reaction materials, high value reaction/separation film materials and the like.
Abstract:
The invention relates to a method for preparing a multicomponent metal-hybrid nanocomposite manufactured by a one-step process and, more specifically, to the method for preparing the multicomponent metal-hybrid nanocomposite which can manufactures the highly efficient and durable multicomponent metal-hybrid nanocomposite by one step without a coupled process including dipping, drying, plasticizing, annealing etc. which is essential in conventional alloy catalyst manufacture and the multicomponent metal-hybrid nanocomposite prepared thereby. According to the preparing method of the present invention, a composite can be synthesized by a simple process vaporizing the metal precursors of two types at the same time, and an additional treatment process like other processes is not necessary.
Abstract:
PURPOSE: A carbon dioxide absorbent based on natural biomass and a manufacturing method thereof are provided to innovatively reduce a process cost since a process for maintaining a high dispersion state when adding an active ingredient is not needed as an alkali metal or an alkali metal component included in the natural biomass forms has a highly dispersed state by itself. CONSTITUTION: A manufacturing method of a carbon dioxide absorbent based on natural biomass comprises the steps of: carbonizing a plant-based biomass material including an alkali metal or an alkali earth-metal; and pulverizing the carbonized biomass material. The plant-based biomass material including an alkali metal or an alkali earth-metal is plant-based cellulose.
Abstract:
PURPOSE: A method for uniformly supporting high-density nano-catalyst on the surface of carbonized cellulose fiber and uniform high-density nano-catalyst support manufactured by the same are provided to coat catalyst particles on the surface of the support without coagulation. CONSTITUTION: A method for uniformly supporting high-density nano-catalyst on the surface of carbonized cellulose fiber includes the following: a low-concentration catalyst solution is coated on a carbon-based support; The carbon-based support is oxidation fired; The oxidation fired support is reduced; the oxidation firing process and the coating process are repeated for several times; and a drying process is followed. The coating process is implemented based on an impregnation technique. The catalyst is a nitrite or chloride-based catalyst.
Abstract:
본 발명은 천연 셀룰로오스 섬유의 표면에 금속촉매 나노입자가 담지된 촉매 및 이의 제조방법에 관한 것으로, 보다 상세하게는, 특정한 전처리를 통하여 천연 셀룰로오스 섬유의 표면의 표면적을 향상시키고 결함(defect)을 만들어 준 후 상기 천연 셀룰로오스 섬유의 표면에 금속촉매 나노입자가 담지되도록 제조한, 우수한 촉매반응활성을 나타내며 저비용으로 생산할 수 있는 천연 셀룰로오스 섬유의 표면에 금속촉매 나노입자가 담지된 촉매 및 이의 제조방법에 관한 것이다. 천연 셀룰로오스 섬유, 금속촉매 나노입자, 전처리과정, 화학처리, 분산도, 탄화, 화학기상증착법, 함침법
Abstract:
본 발명은 복합재료 시트 제조장치에 관한 것으로서, 본 발명에 따른 복합재료 시트 제조장치는, 컨베이어 이송장치; 상기 컨베이어 이송장치에 세라믹시트를 공급하는 제1세라믹시트 권출롤; 상기 세라믹시트에 천연섬유를 공급하는 천연섬유 공급기; 상기 세라믹시트에 고분자 물질을 공급하는 고분자 공급기; 상기 세라믹시트에 상기 천연섬유 및 상기 고분자 물질을 적층한 전처리시트를 가열하는 제1히팅장치; 및, 가열된 상기 전처리시트를 복합재료 시트로 성형하는 압축롤러를 포함하며, 본 발명에 따른 복합재료 시트 제조장치를 사용함으로써, 분해가 용이하여 환경오염을 최소화할 수 있고, 중량이 가벼운 복합재료 시트를 제조할 수 있다.
Abstract:
PURPOSE: A method for fabricating nanofiber of cellulose acetate and montmorillonite is provided to obtain nanofiber with improved structural, thermal, and mechanical characteristics. CONSTITUTION: A method for fabricating nanofiber comprises: a step of preparing a mixture solution of cellulose acetate solution and montmorillonite; and a step of electrospinning the mixture solution. The method further comprises a step of stirring the mixture solution before electrospinning.