• 제목/요약/키워드: hybrid organic materials

검색결과 290건 처리시간 0.032초

Hydrogen Storage Behaviors of Carbon Nanotubes/Metal-organic Frameworks-5 Hybrid Composites

  • Park, Soo-Jin;Lee, Seul-Yi
    • Carbon letters
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    • 제10권1호
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    • pp.19-22
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    • 2009
  • In this work, the hydrogen storage behaviors of carbon nanotubes (CNTs)/metal-organic frameworks-5 (MOF-5) hybrid composites (CNTs/MOF-5) were studied. Hydrothermal synthesis of MOF-5 was conducted by conventional convection heating using 1-methyl-2-pyrrolidone (NMP) as a solvent. Morphological characteristics and average size of the CNTs/MOF-5 were also obtained using a scanning electron microscopy (SEM). The pore structure and specific surface area of the CNTs/MOF-5 were analyzed by N2/77 K adsorption isotherms. The capacity of hydrogen storage of the CNTs/MOF-5 was investigated at 298 K/100 bar. As a result, the CNTs/MOF-5 had crystalline structures which were formed by hybrid synthesis process. It was noted that the CNTs/MOF-5 can be potentially encouraging materials for hydrogen adsorption and storage applications at room temperature.

Highly efficient white organic light-emitting diodes using hybrid-spacer or/and codoped blue emitting layers

  • Seo, Ji-Hoon;Kim, Gu-Young;Hyung, Gun-Woo;Lee, Kum-Hee;Kim, You-Hyun;Kim, Woo-Young;Yoon, Seung-Soo;Kim, Young-Kwan
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.1219-1221
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    • 2008
  • The Authors have demonstrated highly efficient white organic light-emitting diodes using hybrid-spacer which was inserted between each emitting layer or/and codoped blue emitting layers with the different functional material. The characteristics of WOLEDs showed the maximum external quantum efficiency of 13.8%, power efficiency of 33.66 lm/W, and Commission Internationale de I'Eclairage coordinates of (x=0.36, y=0.37), respectively.

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자동차용 냉연강판 SPCC와 냉연고장력강판 SPCF590의 유/무기 하이브리드 용액에 의한 내식특성 (Corrosion Resistance by Organic/Inorganic Hybrid Solution for Cold Rolled Steel of SPCC and SPFC590 for Automobile)

  • 이소영;이광호;정희록;남기우
    • 동력기계공학회지
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    • 제19권5호
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    • pp.38-44
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    • 2015
  • The cold-rolled steel sheet for automobile is liable to corrosion, and will be painting in a variety of ways for the anticorrosive. This paper was coated on cold rolled steel (SPCC and SPFC590) for automobiles using five kinds of organic/inorganic hybrid solution. This was evaluated corrosion resistance and so on by the salt spray. Corrosion area was less according to increasing of curing time in 2 types of steel plate with 5 types of the coating solution. No.1 solution was showed the best corrosion resistance regardless of the kinds of the steel sheet. It is judged that the melamin hardner had the role of bridge between $SiO_2$ polysilicate and urethan resin. Other properties were excellent in all solution.

Cr-free Si 변성 유/무기하이브리드 코팅액에 의한 열화된 STS310S 및 STS347H의 내식성 (Corrosion Resistance of Degraded STS310S and STS347H by Cr-free Modified Si Organic/Inorganic Hybrid Coating Solution)

  • 이소영;김영수;정희록;김귀식;남기우
    • 동력기계공학회지
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    • 제19권6호
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    • pp.12-18
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    • 2015
  • Austenitic stainless steels generally experience the occurrence of chromium-depleted zones at the boundaries, known as sensitization, caused by the carbide precipitation that takes place due to a welding process or heat treatment. Normally, the depleted zones become the focus of the intense corrosion. In this study, the Cr-free organic/inorganic hybrid solution was developed, and the artificially degraded STS316S and STS347H with the solution-coating investigated the corrosion resistance by salt spray test. Both the OIBD-1 and OIBD-2 solutions improved the corrosion resistance of STS310S and STS347H. The corrosion resistance with the OIBD-1 solution was better than that of OIBD-2 solution. Additionally, Both solutions have been proven excellence in adhesion ability, boiling water resistance and flexibility. However, a problem of rubbing after the boiling was found out to be overcome.

Barrier property Enhancement of Plastic Substrates for Flexible Display by Inorganic-organic Hybrid Multilayer

  • Kim, Hyun-Gi;Ryu, Hyun-Sun;Kim, Sung-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.617-619
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    • 2008
  • Inorganic-organic hybrid multilayers were formed on the plastic substrate to enhance the barrier properties of substrate to water vapor and oxygen transport. Plasma pretreatment of substrate with $Ar/O_2$ lead to adhesion improvement and the densification of inorganic layer on the substrates. Combination of $SiO_xN_y$ layer and silanenanoclay composite layer offered quite good barrier properties (WVTR and OTR) to PES substrate.

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CaO-SiO2-PEEK 생체복합체의 제조와 in-vitro 특성평가 (Preparation of CaO-SiO2-PEEK bio-composites and in-vitro Evaluation)

  • 김일용;조성백;김종옥;신종우;이성호;박중근;김택남
    • 한국재료학회지
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    • 제14권4호
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    • pp.287-292
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    • 2004
  • A bio-composites were prepared by mechanical mixing with bioactive sol-gel derived $CaO-SiO_2$ and organic PEEK for bone repairing hybrid materials. The composites were characterized by in-vitro test. A bonelike apatite was formed on the surface of all bio-composites in SBF test. The cell morphology and adhesion on the surface of the composites having below 30% PEEK were clearly observed in L929 cell experiment.

Multicomponent Nanostructured Materials for Separation Membranes

  • Peinemann, Klaus-Viktor
    • 한국막학회:학술대회논문집
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    • 한국막학회 2004년도 Proceedings of the second conference of aseanian membrane society
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    • pp.11-11
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    • 2004
  • Under the coordination of GKSS a new European project in the field of membrane development started recently. This project focuses on the development of novel nanostructured materials for selective material transport and separation. Two classes of materials will be developed in this project: nanostructured organic/inorganic hybrid materials and functional self-organized supramolecular copolymers.(omitted)

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