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곽완규,차재령,공명선 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
The present study concerns modification of surface of polyester fiber by thermal treatment using a silver carbamate complex. A detailed characterization of the silver-coated polyester fiber was investigated by scanning electron microscopy (SEM), X-ray diffraction technique (XRD) and X-ray photoelectron spectroscopy (XPS). The results revealed the remarkable changes in the surface morphology and microstructure of silver film on polyester fiber after thermal reduction. The SEM results showed that the silver particles were uniformly and densely deposited on the surface of polyester fiber. The XRD pattern of silver coated fabric showed that silver film is crystalline structure.
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Wan-Gyu Kwak(곽완규),Tae-Sung Kim(김태성),Myoung-Seon Gong(공명선) 한국고분자학회 2017 폴리머 Vol.41 No.2
이 연구의 목적은 신속하고 편리한 방법으로 면 섬유에 열처리에 의하여 안정한 은 나노입자를 형성시키는 방법을 개발하고 면 섬유의 기능을 부가하여 응용성을 증가시키는 것이다. 은의 생성은 은 카바메이트 용액에 면 섬유의 타래를 침적한 후 125 ℃에서 단순히 가열하여 완결할 수 있었다. 면 섬유의 양은 은 이소프로필카바메이트 전구체의 농도를 변화하여 용이하게 조절할 수 있었다. 이렇게 생성된 면 섬유/은 표면의 형태와 정량적인 분석은 전자주사 현미경(SEM)과 에너지 분산형 X선 분석기(EDX)로 결정하였다. 섬유 표면에 생성된 은 나노입자는 30에서 200 nm의 크기를 가지며 조밀하게 생성되었으며, 이것은 125 ℃의 성장 조건에서 은 나노입자의 빠른 성장과 응집에 의한 것이다. 이러한 은 나노입자들은 면 섬유/은을 3회 세척한 후에도 분리되지 않았다. 항균성 시험에서 S. aureus와 E. coli에 대한 우수한 항균 특성을 보여주었으며 은 코팅된 면 섬유는 최고 0.15 kΩ·cm의 전기 저항을 나타내었다. The objective of this study was to develop a rapid and convenient method of producing stable silver nanoparticles (AgNPs) on cotton fibers via a thermal treatment and their application to augment the properties of cotton fibers. Silver deposition was completed by dipping a skein of cotton fiber into silver carbamate precursor solutions, followed by heating at 125 ℃. The amount of AgNPs on cotton fibers was controlled by changing the concentration of silver isopropylcarbamate precursor solutions. The surface morphology and quantitative analysis of the silvered cotton fibers were determined by scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDX). The AgNPs between 30-200 nm were seen to be densely deposited on the fiber surface due to rapid growth and aggregation of AgNPs at the 125 ℃ growing condition. Moreover, the AgNPs did not leach out of the fibers after three laundry cycles. Antibacterial activity was evaluated against S. aureus and E. coli. The cotton fiber/Ag composites imparted high conductivity to the fibers, as evidenced by an electrical resistivity of 0.15 kΩ·cm.
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차재령,곽완규,이칠원,공명선 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Novel fused ring spiro compounds, 3,9-di(di-p-tolyl)aminospiro[benzo [de]anthracene-7,9'-fluorene] (D1) and 3,9-di(di-4-biphenyl)aminospiro [benzo[de]anthracene-7,9'-fluorene] (D2) were designed and synthesized as fluorescent blue dopant materials. These compounds are light yellowish green in color and emit a sky-blue light in their photoluminescence. They possess a decomposition temperature of over 420°C and glass transition temperature of 148°C and 186°C, respectively. More fused ring compounds, 1-(2-naphthyl)-10-(2-(6-phenyl)naphthyl)spiro[benzo [ij]tetraphene-7,9'-fluorene] (H3) was used as a blue host material and the electroluminescence (EL) characteristics of such were evaluated. The EL devices made of indium tin oxide (150 nm)/N,N’-diphenyl-N,N’- bis[4-(phenyl-m-tolyl-amino)phenyl]-biphenyl-4,4’-diamine (DNTPD, 60 nm)/N,N,N’,N’-tetra(1-biphenyl)-biphenyl-4,4’-diamine (TBB, 30 nm/ H3 hosts: D1 or D2 dopant (30 nm, 5 %)/9,10-di(naphthalene-2-yl) anthracen-2-yl-(4,1-phenylene)(1-phenyl-1H-benzo[d]imidazole) (LG201, 20 nm)/LiF (1 nm)/Al (200 nm) were fabricated and characterized. The EL spectra of the devices with films fabricated via vacuum vapor deposition using an H3 host doped with D1 and D2 are similar to the PL spectrum of the solid thin film. At a 5% concentration for D1, a blueemitting OLED was realized with an emission peak at 472 nm, a maxi mum luminance efficiency of 8.91 cd/A and an external quantum efficiency of 5.16% with a current density of 11.31 mA/cm<sup>2</sup>.
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