• Title, Summary, Keyword: silicone

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The Effects of Silicone oil in Deep Fat Frying Process (튀김과정에서의 Silicone oil의 효과에 관한 연구)

  • 원미량
    • Journal of the Korean Home Economics Association
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    • v.19 no.2
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    • pp.213-221
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    • 1981
  • This theiss deals with the effects of addition of silicone oil to the polymerization and oxidation of frying oil in the practical deep fat frying process. The measurement of frying oil stability was carried out under various silicone oil content and compared with controlled frying process. In controlled frying process A.V., C.O.V., TBA, and contents of petroleumether insoluble fatty acids were increased as time was increased. It means thermal oxidized polymerization and hydrolysis of frying oil was occurred. When silicone oil was added to frying oil, it's thermal stability was better than that of the controlled oil and the degree of thermal stability was changed according to the contents of silicone oil. We obtained the highest degree of thermal stability when silicone oil was added 1ppm.

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Interfacial Breakdown Phenomena in XLPE/EPDM Laminates (XLPE/EPDM laminate의 계면절연파괴괴현상)

  • 남진호;서광석
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.540-543
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    • 1999
  • In order to determine what indluences the interfacial breakdown in EPDM/XLPE laminates. We studied the interfacial breakdown phenomena at several interfacial conditions. Breakdown strength in laminates pasted with silicone oil was higher than that with silicone grease. As a function of heat treatment time in a vacuum, interfacial breakdown strength increased much in XLPE/EPDM laminates pasted with silicone grease but increased a little in that with silcone oil. FT-IR spectrum of silicone oil was similar to that is silicone grease. FT-lR spectrum of silicone oil was not changed by the heat treatment in a vacuum, but in silicone grease another peak appeared.

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Dimensional Properties of Low Temperature Plasms and Silicone Treated Wool Fabric

  • Kim, Min-Sun;Kang, Tae-Jin
    • Fibers and Polymers
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    • v.2 no.1
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    • pp.152-156
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    • 2001
  • Three different silicone polymer systems, such as aminofunctional, epoxyfunctional, and hydrophilic epoxyfunctional silicone polymers, were applied onto plasma pretreated wool fabric to improve the dimensional properties. The results showed that the plasma pretreatment modified the cuticle surface of the wool fiber and increased the reactivity of wool fabric toward silicone polymers. Felting shrinkage of plasma and silicone treated wool fabric was decreased with different level depending on the applied polymer system. Fabric tear strength and hand were adversely affected by plasma treatment, but these properties were favorably restored on polymer application. Therefore, it has been concluded that the combination of plasma and silicone treatments can achieve the improved dimensional stability, and better performance properties of wool fabric. The surface smoothness appearances of treated fabrics were measured using a new evaluation system, which showed good correspondence with the results of KES-FB4 surface tester.

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Improvement in Interfacial Performances of Silicone Rubber by Oxygen Plasma Treatment

  • Lee, Ki-Taek;Seo, Yu-Jin;Huh, Chang-Su
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.232-233
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    • 2005
  • The Surface of semi-conductive silicone rubber was treated by oxygen plasma to improve adhesion and electric performance in joints between insulating and semi-conductive silicone materials. Surface characterizations were assessed using contact angle measurement and Fourier transform infrared spectroscope (FTIR). Adhesion level was understood from T-peel tests between plasma treated semi-conductive and insulating material. Electrical breakdown strength was measured to understand the charge of electrical performance. From the results, the oxygen plasma treatment produces a significant increase in function group of containing oxygen which can be mainly ascribed to the creation of carbonyl groups on the silicone surface from the strength were improved. Therefore it is concluded then plasma treatment leads to decrease voids originating form poor adhesive, and the improve the adhesion in silicone interface. So we could obtain higher electrical design level of silicone material used for electrical apparatus using oxygen plasma treatment.

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The Effect of Plasma Treatment on Surface Properties and Adhesion Characteristics of semiconductive Silicone Rubber (반도전성 실리콘 고무의 표면 특성과 접착특성에 미치는 플라즈마 처리의 영향)

  • Hwang, Sun-Mook;Hong, Joo-Il;Hwang, Cheong-Ho;Huh, Chang-Su
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.254-255
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    • 2005
  • In this work, the effects of plasma treatment on surface properties of semi conductive silicone rubber were investigated in terms of X-ray photoelectron spectroscopy(XPS). The adhesion characteristics of semiconductive-insulating interface layer of silicone rubber were studied by measuring the T-peel strengths. As a result, semiconductive silicone rubber surfaces treated with plasma discharge led to and increase in oxygen-containing functional groups, resulting in improving the degree of adhesion of the semiconductive-insulating interface layer of silicone rubber. these results are probably due to the modifications of surface functional groups or polar component of surface free energy of the semi conductive silicone rubber.

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The Effects of Environmental Factors on Degradation and Hydrophobicity Recovery Characteristics in RTV Silicone Rubber (RTV 실리콘 고무의 열화 및 발수성 회복 특성에 미치는 환경인자의 영향)

  • Heo, Chang-Su;Yeon, Bok-Hui;Jo, Hyeon-Uk;Hwang, Myeong-Geun
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.48 no.6
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    • pp.462-468
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    • 1999
  • Room temperature vulcanizing (RTV) silicone rubber has been widely used to coat porcelain insulators to render water repellency to prevent formation of water film on the surface and thus to suppress the leakage current and consequently flashover. However, the electrical property and the hydrophobicity of RTV silicone rubber coating under outdoor condition may be influenced by many environmental factors. In this studyvarious treatments, such as salt-fog, salt water immerging and UV irradiation were applied to the samples to investigate the change of the electrical property and hydrophobicity. As a result the leakage current increased and contact angle decreased asthe degradation time is longer. But the degraded RTV silicone rubber has recovered its hydrophobicity during the drying time in ambient condition because LMW(Low Molecular Weight) silicone fluid diffused from the bulk to the surface.

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Synthesis and Characterization of Phenyl Modified Silicone Polymer (페닐기를 도입한 실리콘 고분자의 합성 및 물성)

  • Lee, Ha-Hyoung;Lee, Hae-Joon;Kim, Jung-Hyun
    • Applied Chemistry for Engineering
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    • v.7 no.4
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    • pp.633-638
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    • 1996
  • The phenyl modified silicone polymer, 1,1-diphenyl-1-methyl-7-hydroxydodecamethylheptasiloxysilane, was synthesized to prepare the silicone polymer with good cold-proof and heart-proof properties. From the TGA analysis in the range of $100{\sim}800^{\circ}C$, the phenyl modified silicone polymer had good thermal properties than polydimethylsiloxane. And furthermore fluidity was maintained even below $0^{\circ}C$. Also, the silicone rubber blended with the phenyl modified silicone polymer had better mechanical properties than the silicone rubber.

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Thermal Curing Property of Silicone Encapsulant Containing Quantum Dot Surrounded by Various Types of Ligands

  • Lee, Chae Sung;Kim, BeomJong;Jeon, Seongun;Han, Cheul Jong;Hong, Sung-Kyu
    • Bulletin of the Korean Chemical Society
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    • v.34 no.12
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    • pp.3787-3789
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    • 2013
  • In this study, the silicone thermal curing degree of the silicone-encapsulated quantum dot light emission diode was measured using the various types of chemical ligands around quantum dot. It was confirmed that the trioctyl phosphin oxide (TOPO) ligand around the quantum dot was responsible for dispersion of the quantum dot in silicone encapsulant and decline of the thermal curing degree of the silicone encapsulant. Also, it was confirmed that the thermal curing degree of silicone encapsulants containing the steric acid (SA) and the dodecanoic acid (DA) ligands were higher than the one of TOPO ligand.

Effects of Ageing Factors on Low Molecular Weight Silicone Fluids Content Fluids Content and Surface Hydrophobicity in HTV Silicone Rubber (HTV 실리콘 고무에서 열화인자에 따른 저분자량 성분과 표면 발수성의 변화)

  • 허창수;연복희;조한구
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.12 no.1
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    • pp.1-10
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    • 1999
  • In this paper, we have investigated the effects of the environmental factors on Low Molecular Weight (LMW) silicone fluid contents existing in high temperature vulcanized (HTV) silicone rubber sample, using dipping method and contact angle, current measurement. Artificial treatments such as immersion in water, elevated temperature, UV irradiation and dry band arcing under salt-fog condition are selected as the environmental factors. This results will be helpful to investigate the degradation with time and to expect a life time, because the LMW silicone content, which is important to recovery the hydrophobicity of silicone rubber surface, show different results by each environmental factors.

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