Abstract:
PURPOSE: A graphene - iron oxide composite and a manufacturing method thereof are provided to effectively absorb heavy metal by the high specific surface area, obtain flexibility and preferentially segregate at the same time. CONSTITUTION: A graphene - iron oxide composite includes a graphene and iron oxide nanoparticle having a needle-shape formed on the graphene surface. The length of the iron oxide nanoparticle is 10-500 nano meters. The specific surface area of the graphene - iron oxide composite is 200m^2/g or greater. A manufacturing method of the graphene- iron oxide composite comprises the following steps: preparing a reduced graphene dispersion solution; forming a mixed solution by mixing the dispersion solution with an iron oxide precursor solution; forming a graphene-iron oxide composite dispersion solution including the graphene - iron oxide composite by stirring the mixture; and segregating the graphene - iron oxide composite from the graphene - iron oxide composite dispersion solution.
Abstract:
PURPOSE: Photo-sensitive micro-capsules and a method for manufacturing the same are provided to obtain photo-sensitive polyelectrolyte micro-capsules by introducing a photo acid generator to a polyelectrolyte multi-layered structure. CONSTITUTION: Photo-sensitive polyelectrolyte micro-capsules include a polyelectrolyte capsule and a photo-acid generator which is trapped in the capsule. The photo-sensitive polyelectrolyte micro-capsule is based on polyelectrolyte of negative charges and polyelectrolyte of positive charges. A method for manufacturing the photo-sensitive polyelectrolyte micro-capsules includes the following: The polyelectrolyte of negative charges is reacted with hardening melamine-formaldehyde colloid particles in an aqueous solution. The polyelectrolyte is coated on the surface of the colloid particles. The polyelectrolyte of positive charges is reacted with hardening melamine formaldehyde in an aqueous solution to coat the polyelectrolyte of positive charges on the surface of the capsule. The aqueous solution is washed with an acid solution of pH 1 or less to eliminate the hardening melamine formaldehyde. Polyelectrolyte capsules are obtained. The photo-acid generator is introduced into the polyelectrolyte capsules.
Abstract:
기판상에형성된하부전극; 하부전극상에형성된활성층; 및활성층상에형성된상부전극을포함하며, 활성층은자가응집물질로이루어진자가응집체및 유기고분자물질을포함하는유기고분자물질층을포함하는유기비휘발성메모리장치가제공된다. 이때, 활성층은자가응집물질및 유기고분자물질만으로도전류-전압특성을나타낼수 있으며, 이에따라이를다양한전자소자에적용할수 있다.
Abstract:
본 발명은 그라핀-산화철 복합체 및 그 제조방법에 관한 것으로서, 본 발명의 그라핀-산화철 복합체는 그라핀과 상기 그라핀 표면에 형성된 바늘 형태의 산화철 나노입자를 포함하는 것이고, 그 제조방법은 (A) 환원된 그라핀 분산용액을 준비하는 단계, (B) 분산용액과 산화철 전구체를 포함하는 용액을 혼합하여 혼합용액을 형성하는 단계, (C) 상기 혼합용액을 교반하여 상기 그라핀 표면에 바늘 형태의 산화철 나노입자가 형성된 그라핀-산화철 복합체를 포함하는 그라핀-산화철 복합체 분산용액을 형성하는 단계 및 (D) 상기 그라핀-산화철 복합체 분산용액으로부터 상기 그라핀-산화철 복합체를 분리하는 단계를 포함하는 것이다.
Abstract:
PURPOSE: A graphene thin film based on a sulfonyl hydrazide-based reducing agent and a method for manufacturing a photoelectric device using the same are provided to adjust the thickness of a reduced graphene thin film. CONSTITUTION: A graphene thin film based on a sulfonyl hydrazide-based reducing agent includes the following: oxidation graphene is prepared; the oxidation graphene is reduced based on a sulfonyl hydrazide-based reducing agent to manufacture graphene; the graphene is dispersed in an organic solvent to manufacture a graphene dispersed solution; and a graphene thin film is manufactured based on the graphene dispersed solution. The sulfonyl hydrazide-based reducing agent includes a sulfonyl hydrazide substituted group represented by chemical formula 1.
Abstract:
본 발명은 중금속 제거제는 뭉침과 흩어짐이 가역적으로 가능한 탄소나노튜브들을 포함하는 코어와, 산화철을 포함하는 고분자 쉘을 포함하는 코어-쉘 구조의 중금속 제거제에 관한 것이다. 본 발명의 코어-쉘 구조의 중금속 제거제 제조방법은 (a) 산 처리한 탄소나노튜브를 용해시킨 탄소나노튜브 수용액을 준비하는 단계, (b) 탄소나노튜브 수용액과 고분자 주형 입자 수용액을 혼합하여 주형 입자 표면에 탄소나노튜브층을 형성하는 단계, (c) 단계 (b)를 거친 용액과 양전하를 띄는 고분자 전해질을 혼합하여 탄소나노튜브층 외면에 고분자층을 형성하는 단계, (d) 단계 (c)를 거친 용액에 FeSO 4 , Fe 2 (SO4) 3 또는 이들의 혼합물을 첨가하고 교반하여 고분자층에 산화철이 포함되도록 하는 단계, (e) 단계 (d)를 거친 용액으로부터 입자를 분리하는 단계 및 (f) 열처리하여 상기 주형 입자를 제거하는 단계를 포함한다. 한편, 본 발명의 중금속 제거방법은 본 발명의 코어-쉘 구조의 중금속 제거제를 이용하여, 코어의 탄소나노튜브에 중금속이 흡착되도록 하여 중금속을 제거하는 것이다.
Abstract:
PURPOSE: A reusable heavy metal eliminating agent and a method for manufacturing the same are provided to effectively eliminate heavy metals using an heavy metal eliminating agent of a core-shell structure. CONSTITUTION: A carbon nano-tube aqueous solution is prepared by dissolving acid-treated carbon nano-tubes. The carbon nano-tube aqueous solution is mixed with a polymer template particle aqueous solution to form a carbon nano-tube layer on the surface of template particles. The solution through the previous processes is mixed with a polymer electrolyte of a positive electric charge to form a polymer layer on the external side of the carbon nano-tube layer. FeSO_4, Fe_2(SO_4)_3, or the mixture of the same are added to the solution through the previous process and is stirred such that the polymer layer includes iron oxide. Particles are separated, and the template particles are eliminated by a thermal treating process.