Abstract:
본 발명은 실리카 전구체, 알루미나 전구체 또는 이의 혼합물의 졸-겔 용액과 고분자 수지의 혼합용액을 전기방사(electrospinning)하여 배출된 초극세 섬유가 연속적으로 랜덤하게 배열 및 축적되어 이루어진 섬유상 다공체를 여과층으로 포함하고, 상기 초극세 섬유의 평균직경이 10~500 nm이고, 상기 섬유상 다공체의 기공 크기 분포에서 최대 빈도의 기공크기가 0.05~2 μm인 것을 특징으로 하는 고분자 섬유상 필터 및 이의 제조방법에 관한 것으로서, 상기 필터는 바이러스와 같은 극미세 입자까지도 제거할 수 있는 우수한 여과효율을 가지면서도 여과시 압력손실이 낮아 높은 투과유량을 나타내고 고온에서 재생이 가능하여 공기 및 수처리 필터로 유용하게 사용될 수 있다.
Abstract:
본 발명은 태양전지용 전극 및 이를 이용한 태양전지의 제조방법에 관한 것으로서, 보다 상세하게는 전기분사 방식을 이용하여 대면적, 다층막 형태의 태양전지용 전극을 제조하는 방법에 관한 것이다. 본 발명의 광활성층을 포함하는 태양전지용 전극의 제조방법은 (a) 용매 내에 전자주개형 유기물질 및 전자받개형 유기물질을 포함하는 분사용액을 제조하는 단계 및 (b) 분사용액을 투명 전극이 형성된 유리 기판 상에 전기분사하여 광활성층을 형성하는 단계를 포함한다. 단계 (a)는 전자주개형 유기물질을 용해시킨 제1 용매와 전자받개형 유기물질을 용해시킨 제2 용매를 혼합하여 제조하는 것일 수 있고, 제1 용매와 제2 용매의 혼합 질량 비율은 9:1 내지 1:9일 수 있다. 단계 (b)를 반복적으로 수행하여 적층된 광활성층을 형성할 수 있고, 적층된 광활성층은 전자주개형 유기물질 및 전자받개형 유기물질의 총농도가 순차적으로 증가 또는 감소하는 농도 구배형 광활성층일 수 있다.극을 제조하는 방법에 관한 것이다.
Abstract:
PURPOSE: An ultrafine continuous fiber-phase ceramic filter and a method for manufacturing the same are provided to electro-spin a metal oxide precursor solution to adjust the diameter of fiber and size distribution of pores and to be regenerated at a high temperature. CONSTITUTION: An ultrafine continuous fiber-phase ceramic filter includes a fibrous porous body as a filtering layer. Ultrafine fiber is continuously and randomly arranged and accumulated in the fibrous porous body. A method for manufacturing ultrafine fiber includes the following: The sol-gel solution of a metal oxide precursor or the mixed solution of the sol-gel solution and a polymer resin is electro-spun. The polymer resin is eliminated or carbonized through a sintering process. The average diameter of the ultrafine fiber is between 10-500nm. The fibrous porous body includes nano-alumina.
Abstract:
PURPOSE: An ultramicro polymer fiber-phase filter is provided to improve the filtering efficiency and the water permeability by adjusting the diameter of polymer fiber and the side distribution of pores. CONSTITUTION: An ultramicro polymer fiber-phase filter includes fibrous porous body as a filtering layer. Ultramicro fiber is continuously and randomly arranged and accumulated on the fibrous porous body. A method for manufacturing the ultramicro fiber includes an electro-spinning process using a mixed solution. The mixed solution includes a polymer resin and a sol-gel solution composed of a silica precursor, an alumina precursor, or the mixture of the same. The average diameter of the ultramicro fiber is between 10 and 500nm.
Abstract:
PURPOSE: A graphene composite nanofiber and a manufacturing method thereof are provided to secure the excellent mechanical property and electrical property of a graphene. CONSTITUTION: A graphene composite nanofiber contains multiple graphenes concentrated on one side inside a polymer nanofiber or a carbon nano fiber with the diameter of 1~1,000 nanometers. The graphenes are either monolayer graphenes or multilayer graphenes. A manufacturing method of a graphene composite nanofiber comprises the following steps: preparing a spinning solution containing the graphenes; and spinning the spinning solution.
Abstract:
본 발명은 염료감응형 태양전지 및 이의 제조방법에 관한 것으로서, 금속산화물 나노입자를 유기용매에 균일하게 분산시킨 뒤 전도성 기판 위에 정전분사하여 형성시킨 메조기공성 금속산화물 나노볼 층을 구비하는 본 발명의 염료감응형 태양전지는, 금속산화물층이 높은 기공도를 지니면서도 기판과의 접촉특성이 우수하여 낮은 계면저항을 유지하고 전하수송효율이 높으며 겔전해질을 사용하는 경우에도 높은 광전변환효율을 갖는다. 정전분사, 금속산화물, 나노입자, 메조기공성, 나노볼, 염료감응형 태양전지, 광전변환효율
Abstract:
A white and color photoexcitation light emitting sheet and a manufacturing method thereof are provided to obtain a white and color surface light source by controlling a composition ratio and a kind of light emitting material according to a light source having an ultraviolet wavelength or a blue wavelength. A white and color photoexcitation light emitting sheet includes a substrate(10), a light source, and a white and color photoexcitation light emitting layer(20). The light source is formed on the substrate. The light source is a lamp or a light emitting device including an organic light emitting device and an inorganic light emitting device. The organic light emitting device and the inorganic light emitting device emit a light of an ultraviolet wavelength or a blue wavelength. The white and color photoexcitation light emitting layer converts a light emitted in the light source into a light of a different wavelength. The white and color photoexcitation light emitting layer is made of mixture of white and color photoexcitation light emitting material, base polymer, and solvent.
Abstract:
A dye-sensitized solar cell with a metal oxide layer including a metal oxide nano particle by electro-spinning using a mask and a manufacturing method thereof are provided to improve optical conversion efficiency by obtaining high dye-absorption capability and high electron transport characteristic. A metal oxide layer(13) including the metal oxide nano particle is formed on a substrate. The dye is absorbed in the metal oxide nano particle. The electrolyte is injected between a semiconductor electrode(10) and a counter electrode(20). A super fine composite fiber is formed by spraying precursor of the metal oxide and polymer on the substrate. The metal oxide layer including the metal oxide nano particle is formed by removing the polymer from the super fine composite fiber by heat processing the super fine composite fiber after thermo-compression. The porosity of the metal oxide layer is 65 to 90 %.
Abstract:
An electrode for a super-capacitor having metal oxide deposited onto ultra-fine carbon fiber and a fabrication method thereof are provided to maintain high specific capacity of the metal oxide during a high speed charging/discharging process. An electrode for a super-capacitor having metal oxide deposited onto ultra-fine carbon fiber includes a current collector, a carbon substrate, and a metal oxide thin film. The carbon substrate is formed on the current collector and is composed of carbon fiber having a specific surface area of at least 200m^2/g(BET) and d002 of less than 0.36 nm. The metal oxide thin film is formed on the carbon substrate.
Abstract:
A separator having a heat resistant ultrafine fibrous layer is provided to impart excellent cycle characteristics, high energy density and high capacity to a secondary battery. A separator comprises a fibrous layer coated on either surface or both surfaces of a porous film, wherein the fibrous layer comprises a fiber phase formed by electrospinning a heat resistant polymer material having a melting point of 180 deg.C or higher or having no melting point. The heat resistant polymer is at least one selected from aromatic polyesters, polyphosphazenes, polyurethane copolymers, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate.