Abstract: Proposed are a contrast agent containing an iodinated unsaturated fatty acid ethyl ester derived from vegetable oil, a non-iodinated unsaturated fatty acid ethyl ester, and sulfur dioxide (SO2), and a production method thereof. The contrast agent having a similar contrast effect is synthesized using vegetable oil as a substitute for poppy seed oil, which is unstable in terms of supply and is expensive. In addition, the long-term stability problem of an iodine-based contrast agent is solved by adding a non-iodinated unsaturated fatty acid ethyl ester and sulfur dioxide.

Abstract: Disclosed is a construction & engineering material containing a microencapsulated phase change material, wherein one or more components of construction & engineering materials are selected from a group of construction & engineering materials such as sand, cement, gravel, admixture, gypsum, aggregate, plaster, fiber, and magnesium, and the PCM microcapsules are attached to outer surfaces of the selected one or more components of construction & engineering materials.

Abstract: A multiblock copolymer includes a polysulfone repeating unit, a sulfonated polysulfone repeating unit, a polydialkylsiloxane repeating unit and an ethylenic unsaturated group at a terminal of the multiblock copolymer. Also provided are a method of preparing the multiblock copolymer, a polymer electrolyte membrane prepared from the multiblock copolymer, a method of preparing the polymer electrolyte membrane, and a fuel cell including the polymer electrolyte membrane. The polymer electrolyte membrane that has a high ionic conductivity and good mechanical properties and minimizes crossover of methanol can be manufactured at low cost. In addition, the structure of the multiblock copolymer can be varied to increase selectivity to a solvent used in a polymer electrolyte membrane.

Abstract: A proton conductive copolymer includes styrene repeating units that have proton conductive functional groups and dimethylsiloxane repeating units. A polymer electrolyte membrane includes the proton conductive copolymer and a fuel cell uses the polymer electrolyte membrane. The proton conductive copolymer has excellent chemical and mechanical properties, excellent ability to form membrane with dimethylsiloxane repeating units, and superior ion conductivity with styrene repeating units that have proton conductive functional groups. Polymer electrolyte membranes that have properties appropriate for the fuel cell electrolyte membrane can be obtained using the proton conductive copolymer. Fuel cells that have improved efficiencies can be obtained using the polymer electrolyte membrane.

Abstract: A multiblock copolymer includes a polysulfone repeating unit, a sulfonated polysulfone repeating unit and an ethylenic unsaturated group at a terminal of the multiblock copolymer. Also provided are a method of preparing the multiblock copolymer, a polymer electrolyte membrane prepared from the multiblock copolymer, a method of preparing the polymer electrolyte membrane, and a fuel cell including the polymer electrolyte membrane. The polymer electrolyte membrane that has a high ionic conductivity and good mechanical properties and minimizes crossover of methanol can be manufactured at low cost. In addition, the structure of the multiblock copolymer can be varied to increase selectivity to a solvent used in a polymer electrolyte membrane.

Abstract: A composition containing a proton-conductive copolymer, a polymer electrolyte membrane containing the composition; a method of producing the membrane; and a fuel cell employing the membrane. The composition includes: a proton-conductive copolymer comprising a first styrene repeating unit, a second styrene repeating unit, and a dimethylsiloxane repeating unit; and a cross-linked polymer obtained from a cross-linking reaction between a siloxane oligomer having an unsaturated bond and a cross-linking agent. The cross-linked polymer has the same properties as the dimethylsiloxane repeating unit of the proton-conductive copolymer.

Abstract: Provided are a polymer membrane that includes a porous polymer matrix and an acryl-based polymer infiltrated in pores of the porous polymer matrix, a method of preparing the same, and a fuel cell using the polymer membrane. The polymer membrane effectively decreases a crossover phenomenon of a fuel cell.

Abstract: Disclosed herein is a slurry-type coating solution for cation-conducting polymer composite membranes that is capable of producing cation-conducting polymer composite membranes with high ionic conductivity as well as low methanol permeability and low ohmic resistance when used in direct-methanol fuel cells, via pluralization of solvents and use of specific additives. The coating slurry comprises about 1 to about 10 parts by weight of a sulfonated clay, about 100 parts by weight of a cation exchange group-containing polymer, and a co-solvent consisting of a high-boiling point solvent with a boiling point of about 180 to about 250° C. and a low-boiling point solvent with a boiling point of about 100 to about 180° C.

Abstract: A composition containing a proton-conductive copolymer, a polymer electrolyte membrane containing the composition; a method of producing the membrane; and a fuel cell employing the membrane. The composition includes: a proton-conductive copolymer comprising a first styrene repeating unit, a second styrene repeating unit, and a dimethylsiloxane repeating unit; and a cross-linked polymer obtained from a cross-linking reaction between a siloxane oligomer having an unsaturated bond and a cross-linking agent. The cross-linked polymer has the same properties as the dimethylsiloxane repeating unit of the proton-conductive copolymer.

Abstract: A multiblock copolymer includes a polysulfone repeating unit of formula (1) below; a sulfonated polysulfone repeating unit of formula (2) below; and a polydialkylsiloxane repeating unit of formula (3) below, a method of preparing the multiblock copolymer, a polymer electrolyte membrane prepared from the multiblock copolymer, a method of preparing the polymer electrolyte membrane, and a fuel cell including the polymer electrolyte membrane: where l, m, and n are integers of 1-200; each of R1 through R8 is independently hydrogen, fluorine, or a C1-C10 alkyl group that can be substituted by at least one fluorine atom; and X represents a tetraalkylamine cation that can be substituted by hydrogen ions or other cations by ion exchange. The multiblock copolymer has a high ionic conductivity, high hydrophobicity, and good mechanical properties, can minimize crossover of methanol, and can be manufactured at a low cost.

Abstract: A multiblock copolymer includes a polysulfone repeating unit of formula (1) below; a sulfonated polysulfone repeating unit of formula (2) below; and an ethylenic unsaturated group at a terminal of the multiblock copolymer: where l and m are integers of 1-200; each of R1 through R4 is independently hydrogen, fluorine, or a C1-C10 alkyl group that is unsubstituted or substituted by at least one fluorine atom; and X represents a tetraalkylamine cation. Provided are a method of preparing the multiblock copolymer, a polymer electrolyte membrane prepared from the multiblock copolymer, a method of preparing the polymer electrolyte membrane, and a fuel cell including the polymer electrolyte membrane. The polymer electrolyte membrane that has a high ionic conductivity and good mechanical properties and minimizes crossover of methanol can be manufactured at a low cost. In addition, the structure of the multiblock copolymer can be varied to increase selectivity to a solvent used in a polymer electrolyte membrane.

Abstract: Provided are a polymer membrane that includes a porous polymer matrix and an acryl-based polymer infiltrated in pores of the porous polymer matrix, a method of preparing the same, and a fuel cell using the polymer membrane. The polymer membrane effectively decreases a crossover phenomenon of a fuel cell.

Abstract: A proton conductive copolymer includes styrene repeating units that have proton conductive functional groups and dimethylsiloxane repeating units. A polymer electrolyte membrane includes the proton conductive copolymer and a fuel cell uses the polymer electrolyte membrane. The proton conductive copolymer has excellent chemical and mechanical properties, excellent ability to form membrane with dimethylsiloxane repeating units, and superior ion conductivity with styrene repeating units that have proton conductive functional groups. Polymer electrolyte membranes that have properties appropriate for the fuel cell electrolyte membrane can be obtained using the proton conductive copolymer. Fuel cells that have improved efficiencies can be obtained using the polymer electrolyte membrane.

Abstract: The present invention relates to a microcapsule containing a phase change material and its use, and more particularly, to a microcapsule containing a phase change material wherein phase separation and subcooling thereof cannot be produced and the size of the microcapsule can be reduced to the order of several micrometers, to a method of producing the microcapsule, to an article having enhanced heat-retention capability by comprising the microcapsule, and to a method of producing the article. The microcapsule comprises the phase change material selected from a group consisting of n-octacosane, n-heptacosane, n-hexacosane, n-pentacosane, n-tetracosane, n-tricosane, n-docosane, n-heneicosane, n-eicosane, n-nonadecane, n-octadecane, n-heptadecane, n-hexadecane, n-pentadecane, n-tetradecane, and n-tridecane; and a nucleating agent for preventing subcooling of the phase change material.

Abstract: This invention provides water-based compositions, particularly coating, ink, fountain solution and agricultural compositions, manifesting reduced equilibrium and dynamic surface tension by the incorporation of a surface tension reducing amount of an acetylenic diol ethylene oxide/propylene oxide adduct of the structure where r and f are 1 or 2, (n+m) is 1 to 30 and (p+q) is 1 to 30. Use of such adducts as surfactants in photoresist developer/electronics cleaning compositions is particularly advantageous.