• 대한화학회지
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• 제41권3호
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• pp.144-149
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• 1997

N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine(TPD)를 정공수송층으로, squarylium색소를 발광제로, 액정성 폴리머를 TPD의 matrix로 사용하여 electroluminescence(EL) 소자를 제작하였다. ITO 투명전극과 Mg 전극을 각각 홀주입, 전자주입 전극으로 사용하였다. Polymer/TPD 농도를 0.005 wt%로 하여 spin coating법으로 소자를 제작하였을 때 가장 안전한 ELD가 얻어졌다. ITO/polymer-TPD/SQ dye/Mg 구조의 ELD는 인가전압 23 volt에서 붉은색의 발광이 나타났으며 전류는 102 mA/$cm^2$이었다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 추계학술대회
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• pp.324-328
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• 2003

The Magnetoeheological fluid has the properties that it's viscosity has dramastic changed under some magnetic fields therefore, Magnetorhlogical fluids has been used for micro polishing of the micro part( for example, a aspherical surface in a micro lens). The polishing process may appears as follows. A part rotating on the spindle is brought into contact with an Magnetorhological finshing(MRF) fluids which is set in motion by the moving wall. In the region where the part and the MRF fulid ate brought into contact, the applied magnetic field creates the conditions necessary for the material removal from the part surface. The material removal takes place in a certain region contacting the surface of the part which can be called the polishing spot or zone. The polishing mechanism of the material removal in the contact zone is considered as a process governed by the particularities of the Bingham flow in the contact zone. Resonable calculated and experimental magnitudes of the material removal rate f3r glass polishing lends support the validity of the approach.

• 한국염색가공학회지
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• 제21권1호
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• pp.38-45
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• 2009

First of all, the properties imparted to PET fabrics are resistance to and recovery from creasing or wrinkling when wet or dry; high resistance to stretch in the filament yarns but not in the staple; high abrasion resistance; good texture and appearance; resistance to heat ageing; good chemical resistance and good resistance, behind glass, to sunlight. But, the low moisture regain of PET fabric conduces to static troubles in textile processing. Furthermore, garments made from PET may, during wear, develop electric charges which attract to the fabric particles of soil(dirt, swarf, dust) flying in the air, so that the cuffs of shirts, for example, become soiled quickly and are not easily laundered clean. The sericin constitutes 25$\sim$30％ of silk protein and surrounds the fibroin fiber with sticky layer that supports the formation of a cocoon. The useful biochemical properties of sericin protein are oxidation resistant, antibacterial, UV resistant, hydrophilic property, and good affinity with hydrophobic material. These properties can be used as an improving reagent or a coating agent for natural and synthetic fibers, fabrics, and other intermediate products. The sericin is also applied to cross-link, and can be blended with other materials. In this study, we modified the surface of PET fabric by mixture of sericin finishing agent; sericin, polyuretane binder and 1,2,3,4-butanetetracarboxylic acid (BTCA) cross-link agent. Also, we investigated the finshing effect; moisture regain, stiffness, handle, drape and electrostatic. The moisture regain of PET fabric treated with sericin finishing agent was higher than that of untreated PET fabric. As a result of evaluating influence about handle of PET fabrics treated with sericin finishing agent, it was confirmed that the sericin finishing agent could be use as a linen like finishing agent.

• 한국구조물진단유지관리공학회 논문집
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• 제22권1호
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• pp.183-189
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• 2018

본 연구에서는 용사기법에 의해 콘크리트 표면에 금속피막을 형성하는 새로운 마감 의장기법의 가능성을 검토하기 위하여, 콘크리트의 함수율 변화에 따른 금속피막의 부착성능에 대하여 실험적인 연구를 수행하였다. 그 결과, 선재의 색은 용사 후에도 변하지 않는 것을 알 있었고, 콘크리트 부착강도 기준인 2.5 MPa를 확보하기 위한 하지 콘크리트의 함수율을 10% 이하로 관리하면 금속피막의 부착강도눈 확보되는 것으로 판단된다. 또한, 콘크리트와 금속피막의 부착강도를 증진시키기 위해서는 표면강화제에 의한 콘크리트 표면강화와 함께 금속피막을 봉공처리제로 봉공하는 것이 매우 유효한 것을 알 수 있었다.