• Title/Summary/Keyword: Organic-inorganic hybrid composite

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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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    • 2008.10a
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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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Proton Conductivity and Methanol Transport Behaviour of PVdF/SPEEK/$TiO_2$ Hybrid Membrane (PVdF/SPEEK/$TiO_2$ 하이브리드 막의 프로톤 전도도 및 메탄올 전이현상)

  • You, Sun-Kyung;Kalappa, Preshantha;Park, Soo-Gil
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2005.07a
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    • pp.409-411
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    • 2005
  • A series of inorganic-organic hybrid membranes were prepared with a systematic variation of titanium dioxidenanoparticles content. Their water uptake, methanol permeability and proton conductivity as a function of inorganic oxide content were investigated. The results obtained show that the inorganic oxide network decreases the proton conductivity and water swelling. It is also found that increase in inorganic oxide content leads to decrease of methanol permeability. In terms of the morphology, membranes are homogeneous and exhibit a good adhesion between inorganic domains and the polymer matrix. The properties of the composite membranes are compared with the standard nation membrane.

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Titanium Dioxide Nanoparticles filled Sulfonated Poly(ether ether ketone) Proton Conducting Nanocomposites Membranes for Fuel Cell

  • Kalappa, Prashantha;Hong, Chang-Eui;Kim, Sung-Kwan;Lee, Joong-Hee
    • Proceedings of the Korean Society For Composite Materials Conference
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    • 2005.11a
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    • pp.87-90
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    • 2005
  • This paper presents an evaluation of the effect of titanium dioxide nanoparticles in sulfonated poly(ether ether ketone) (SPEEK) with sulfonation degree of 57%. A series of inorganic-organic hybrid membranes were prepared with a systematic variation of titanium dioxide nanoparticles content. Their water uptake, methanol permeability and proton conductivity as a function of temperature were investigated. The results obtained show that the inorganic oxide network decreases the proton conductivity and water swelling. It is also found that increase in inorganic oxide content leads to decrease of methanol permeability. In terms of morphology, membranes are homogeneous and exhibit a good adhesion between inorganic domains and the polymer matrix. The properties of the composite membranes are compared with standard nafion membrane.

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Water Swelling and Methanol Transport Behaviour of $PVdF/SPEEK/TiO_2$ Hybrid Membrane (PVdF/SPEEK/TiO2 하이브리드 막의 수분함량과 메탄올 전이현상)

  • Yu Seon Gyeong;Kim Han Ju;Park Su Gil;Kim Yeong Jae
    • 한국전기화학회:학술대회논문집
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    • 2005.07a
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    • pp.233-240
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    • 2005
  • A series of inorganic-organic hybrid membranes were prepared with a systematic variation of titanium dioxidenanoparticles content. Their water uptake, methanol permeability and proton conductivity as a function of inoranic oxide content were investigated. The results obtained show that the inorganic oxide network decreases the proton conductivity and water swelling. It is also found that increase In inorganic oxide content leads to decrease of methanol permeability. In terms of the morphology, membranes are homogeneous and exhibit a good adhesion between inorganic domains and the polymer matrix. The properties of the composite membranes are compared with the standard nafion membrane.

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Liquid uptake and Methanol Transport Behaviour of $PVdF/SPEEK/TiO_2$ Hybrid Membrane for DMFC (DMFC용 $PVdF/SPEEK/TiO_2$ 하이브리드 막의 수분함량과 메탄올 전이현상)

  • You, Sun-Kyung;Kim, Han-Joo;Kim, Young-Jae;Park, Soo-Gil
    • Proceedings of the KIEE Conference
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    • 2005.11a
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    • pp.194-196
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    • 2005
  • A series of inorganic-organic hybrid membranes were prepared with a systematic variation of titanium dioxidenanoparticles content. Their liquid uptake, methanol permeability and proton conductivity as a function of inoranic oxide content were investigated. The results obtained show that the inorganic oxide network decreases the proton conductivity and liquid uptake. It is also found that increase in inorganic oxide content leads to decrease of methanol permeability. In terms of the morphology, membranes are homogeneous and exhibit a good adhesion between inorganic domains and the polymer matrix. The properties of the composite membranes are compared with the standard nafion membrane.

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Technology and Application of Hybrid Insulation Film for Electric Magnet Wire (하이브리드 절연필름의 전동기권선 적용 특성 연구)

  • Han, Se-Won;Han, Dong-Hee;Kang, Dong-Phil
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.06a
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    • pp.210-211
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    • 2006
  • This study presents the technology and application of hybrid insulation film for electric magnet wire. In order to make the high efficient motor with high space factor, it is necessary to develop a self-lubrication heat-resistant insulation film that can be used when the space factor 70% or more. A key to achieving high windability is to increase the lubricity and bonding strength of vanish, which for a magnet wire generally determines the mechanical scratches characteristics. Effective ways to reduce scratches include improving insulation film prepared by organic and inorganic hybrid synthesis methods.

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Ordered Hybrid Nanomaterials from Self-Assembled Polymeric Building Blocks

  • Kim, Dong-Ha
    • Proceedings of the Polymer Society of Korea Conference
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    • 2006.10a
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    • pp.309-309
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    • 2006
  • Latest developments on hybrid nanostructured materials fabricated by applying self-assembly strategies on organic/inorganic nanotemplates are discussed. Within this frame, numerous functional nanomaterials including arrays of composite metal/semiconductor nanoparticles, planar waveguides and functional multilayer thin films are generated using self-assembled polymers as templates or building blocks. In particular, surface plasmon resonance based optical sensing is employed to investigate nanofabrication processes occurring in nanoscale dimention. We also suggest unprecedented pathways to hybrid supramolecular multilayer nanoarchitectures in 1D or 2D geometry via layer-by-layer self-assembly.

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ORGANIC - INORGANIC COMPOSITE MEMBRANE FOR POLYMER ELECTROLYTE MEMBRANE FUEL CELL

  • Shul, Yong-Gun;Kim, Hyun-Jong;Ahn, Ji-Eun;Han, Hak-Soo
    • Proceedings of the Membrane Society of Korea Conference
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    • 2003.07a
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    • pp.37-40
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    • 2003
  • Mesoporous zeolite - heteropolyacid-polymer hybrid membrane was prepared by sol-gel processes to make a proton conducting membrane. The crystallinity of mesoporous zeolite in composite membrane was increased with contents of heteropolyacid. Proton conductivity obtained from impedance measurements increases with contents of heteropolyacid, about 10$^{-3}$ S/cm in ca. 1.5 Wt% heteropolyacid.

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Liquid Uptake and Methanol Transport Behaviour of PVDF/SPEEK/TiO2 Hybrid Membrane for DMFC (DMFC용 PVDF/SPEEK/TiO2 하이브리드 막의 수분함량과 메탄올 전이현상)

  • You, Sun-Kyung;Kim, Han-Joo;Park, Soo-Gil
    • Journal of the Korean Electrochemical Society
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    • v.8 no.4
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    • pp.177-180
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    • 2005
  • A series of inorganic-organic hybrid membranes were prepared with a systematic variation of titanium dioxide nano particles content. Their liquid uptake, methanol permeability and proton conductivity as a function of inorganic oxide content were investigated. The results obtained show that the inorganic oxide network decreases the proton conductivity and liquid uptake. It is also found that increase in inorganic oxide content leads to decrease of methanol permeability. In terms of the morphology, membranes are homogeneous and exhibit a good adhesion between inorganic domains and the polymer matrix. The properties of the composite membranes are compared with the standard nafion membrane.

Preparation and Characterization of Sol-Gel Derived $SiO_2-TiO_2$ -PDMS Composite Films

  • Hwang, Jin Myeong;Yeo, Chang Seon;Kim, Yu Hang
    • Bulletin of the Korean Chemical Society
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    • v.22 no.12
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    • pp.1366-1370
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    • 2001
  • Thin films of the SiO2-TiO2-PDMS composite material have been prepared by the sol-gel dip coating method. Acid catalyzed solutions of tetraethoxy silane (TEOS) and polydimethyl siloxane (PDMS) mixed with titanium isopropoxide Ti(OiPr) were used as precursors. The optical and structural properties of the organically modified 70SiO2-30TiO2 composite films have been investigated with Fourier Transform Infrared Spectroscopy (FT-IR), UV-Visible Spectroscopy (UV-Vis), Differential Thermal Analysis (DTA) and prism coupling technique. The films coated on the soda-lime-silicate glass exhibit 450-750 nm thickness, 1.56-1.68 refractive index and 88-94% transmittance depending on the experimental parameters such as amount of PDMS, thermal treatment and heating rate. The optical loss of prepared composite film was measured to be about 0.34 dB/cm.