Abstract:
PURPOSE: A poly(arylene ether) copolymer having a cation exchanger is provided to have excellent physical properties, ion exchanging ability and metal ion adsorption ability, and to have excellent processability, thereby capable of being molded to various shape. CONSTITUTION: A poly(arylene ether) copolymer is in chemical formula 1. A manufacturing method of the poly(arylene ether) copolymer comprises: a step of copolymerizing a quioxalines compound in chemical formula 2-c, one or more compounds selected from compounds in chemical formula 3-b, and one or more compounds selected from compounds in chemical formula 4-b; and a step of introducing cation exchange group, which is a sulfonate group(-SO3^-M^+), a phosphate group(-PO3^-M^+), or carboxylate group(-COO^-M^+) into the copolymerized polymer.
Abstract:
본 발명은 입방 모양 PtCo 나노합금 촉매의 제조방법에 관한 것으로서, 더욱 상세하게는 백금전구체, 코발트전구체, 표면안정제 및 환원제를 용매에 용해시킨 뒤 가열을 하여 입방(cubic) 모양의 PtCo 나노합금을 제조하고, 이를 탄소 지지체에 흡착시킨 후 표면안정제를 제거하여 입방 모양 PtCo 나노합금 촉매를 제조하는 것을 특징으로 한다. 본 발명의 입방 모양 PtCo 나노합금 촉매의 제조방법은 간단한 공정으로 균일한 크기와 입방 모양을 가진 나노입자의 제조가 가능하며, 나노입자의 뭉침에 의한 모양 변화, 표면적 변화 및 조성 변화를 방지하여 고효율의 연료전지 개발에 유용하게 적용할 수 있다. 입방모양, 백금, 코발트, 표면안정제, 나노합금, 연료전지
Abstract:
본 발명은 수소이온 전도성 강화 복합막의 제조방법에 관한 것으로, 보다 상세하게는 수소 이온 전도성 물질로써 술폰화된 탄화수소계 고분자에 첨가제를 도입하고, 이것을 치수 안정성이 우수한 다공성 고분자에 함침시켜 완성시킨 강화 복합막 및 그 제조 방법에 관한 것이다. 제조한 강화 복합막은 고분자 전해질 막의 두께를 최소화함으로써 연료전지의 셀저항을 최소화하고 치수 안정성을 개선하여 연료전지의 계면 안정성 확보를 통해 장기 성능을 향상시킬 수 있다. 연료전지, 다공성 고분자, 첨가제, 강화 복합막, 함침
Abstract:
PURPOSE: A polysulfone-based polymer, a polymer electrolyte membrane including thereof, an membrane electrode assembly including thereof, a fuel cell, and a manufacturing method of the polysulfone-based polymer are provided to secure the high hydrogen ion conductivity, and the low methanol transmittance. CONSTITUTION: A polysulfone-based polymer includes a recurring unit marked with chemical formula 1. In the chemical formula 1, X is a single bond or Ar1. The Ar1 is a substituted or non-substituted arylene with 6~20 carbons. M1 and M2 are hydrogen, lithium, sodium, or potassium, independently. R1, R2, R3, and R4 are a linear or branched alkyl group with 1~20 carbons, an alkenyl group with 2~20 carbons, an alkynyl group with 2~20 carbons, a cycloalkyl group with 5~20 carbons, an aryl group with 6~20 carbons, a heteroaryl group with 2~20 carbons, an alkyl aryl group with 7~20 carbons, and an alkoxy group with 1~20 carbons.
Abstract:
본 발명은 고분자 전해질 연료전지용 고분자 전해질 막에 관한 것으로, 보다 상세하게는 수소 이온 전도성 물질로 술폰화 폴리술폰케톤 공중합체에 막/전극 계면 안정성 향상을 위하여 불화수소 계열 고분자를 도입하여 막/전극 계면 접착력 향상하기 위한 고분자 전해질 막에 관한 것이다. 본 발명에서 제안된 술폰화 폴리술폰케톤 공중합체에 대해서, 보다 상세하게는 방향족 술폰 반복단위, 방향족 케톤 반복단위 및 상기 반복단위를 에테르 결합으로 연결하는 방향족 화합물 반복단위를 포함하며, 상기 방향족 술폰 반복단위, 및 방향족 케톤 반복단위 중 적어도 1종 이상이 술폰산 또는 술폰산염 치환기를 가지는 것인 술폰화 폴리술폰케톤 공중합체를 포함하는 고분자 전해질 막에 관한 것이다. 계면안정성, 전해질막, 폴리술폰케톤, PVDF, MEA
Abstract:
A reinforced composite membrane for a polymer electrolyte fuel cell is provided to minimize cell resistance of a fuel cell and to improve dimensional stability by minimizing the thickness of a polymer electrolyte membrane and to improve the performance of the fuel cell. A proton conductive reinforced composite membrane is such that a sulfonated hydrocarbon-based polymer composite material is impregnated into a porous polymer matrix. In the sulfonated hydrocarbon-based polymer composite material, an additive which is a polymer blend of single monomer or a mixture selected from the group consisting of vinylidene fluoride, hexafluoropropylene, trifluoroethylene and tetrafluoroethylene.
Abstract:
A device for controlling axial load and vehicle dynamics is provided to independently control right and left sides of two or more rear axles, thereby correcting the concentration states of cargos in every direction. A device for controlling axial load and vehicle dynamics includes a hydraulic pump driven by engine power, a pair of hydraulic motors(500) operating by the hydraulic force supplied from the hydraulic pump, worm gear boxes(600) connected to the hydraulic motors, T-shafts(700) connected to output shafts of the worm gear boxes and having a shaft and two arms respectively, two rear axles connected to both ends of the arms via air springs, and a control unit(300) for receiving air pressure data from an air pressure gauge for controlling the hydraulic motors to rotate the T-shaft based on the data.
Abstract:
A method for the preparation of porous graphite carbon with excellent crystallinity from sucrose as a carbon precursor is provided to improve crystallinity and obtain porosity by allowing a metal precursor to induce a catalytic action in the polymerization process and carbonization process of the carbon precursor, thereby increasing the polymerization degree of a polymer and forming a polymer structure facilitating the formation of crystalline carbon. A method for the preparation of porous graphite carbon with excellent crystallinity comprises: a first step of dispersing sucrose, a transition metal precursor, and silica particles into distilled water and hydrothermally treating the sucrose, transition metal precursor, and silica particles to prepare a polymerized polymer; a second step of drying the polymerized polymer obtained after the hydrothermal treatment, and heat-treating the polymerized polymer at 700 to 1500 deg.C under vacuum or an inert gas flow to prepare a complex; and a third step of treating the complex with a fluoric acid or sodium hydroxide solution, and washing and filtering the complex treated with the fluoric acid or sodium hydroxide solution to prepare graphite carbon.