• Title/Summary/Keyword: Silicone Oil

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Interfacial Breakdown characteristics in XLPE/EPDM Laminate (XLPE/EPDM laminate의 절연파괴특성)

  • 남진호;서광석
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1999.11a
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    • pp.495-497
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    • 1999
  • In order to determine what influences the interfacial breakdown in EPDM/XLPE laminates, We made the breakdown test ceil and this was pressure controllable breakdown test cell. We make the needle electrode (tip radius: about 10 micrometer) using electrochemical method. We studied the interfacial 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 silicone oil.

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Synthesis and Application for Hydrophilic Polyurethane of Non-swelling Type (Non-swelling type의 Hydrophilic polyurethane 합성 및 응용에 관한 연구)

  • Yang, Jeong-Han;Jeon, Jae-Woo;Yeum, Jeong-Hyun;Kim, Duck-Han;Oh, Kyoung-Suk;Yoon, Nam-Sik
    • Textile Coloration and Finishing
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    • v.23 no.2
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    • pp.118-130
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    • 2011
  • In this study, hydrophilic polyurethane (PU) was synthesized by one shot process to get good non-swelling effect and to keep high breathability using reactive silicone oil of mono terminal and bi-terminal types. We also blended non reactive silicone oil with pure hydrophilic PU to compare non-swelling effect and breathability with hydrophilic PU synthesized by the two types of reactive silicone oils. The hydrophilic films were analyzed by nuclear magnetic resonance (NMR) spectroscopy, scanning electron microscope (SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray photo electron (XPS) spectroscopy, energy dispersive spectrometry (EDS), breathability, waterproofness, tensile strength, contact angle and swelling effect. The results showed that the film made by hydrophilic PU which was synthesized with mono terminal type silicone oil provided good non-swelling effect and acceptable moisture permeability due to the modified surface properties.

Development of Hydrocarbon Oil Detection Sensor using the Swelling Property of Silicone Rubber (기름에 대한 실리콘의 부피 변화 성질을 이용한 유출유 탐지 센서 개발)

  • Oh, Sang-Woo;Lee, Moon-Jin;Choi, Hyeuk-Jin
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.14 no.4
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    • pp.280-286
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    • 2011
  • In this research, the oil detection method and the characteristic of sensor using the selective reaction of silicone rubber in response to hydrocarbon oil will be described. As a sensing principle, the swelling property of silicone rubber in response to hydrocarbon fuel is used, also a strain gauge is used to transduce the volume change to an electrical signal. The sensor core is manufactured with a strain gauge embedded in silicone rubber by the curing process and experiments for characteristics of sensor core with various oils were carried out. It is shown that the sensor core can be used as an oil spill detection sensor. Also, for the application to the sea area, a buoy type sensor platform is integrated with a sensor core and a strain amplifier and it is tested in the simulated oil spill condition. In this study, it is proven that the integrated sensor can be used for the detection of various oils.

Effect of Capsaicin and Silicone Resin Treatment on Inhibition of Thermal Oxidation in Frying Oil (Capsaicin과 규소수지 처리가 튀김유의 가열산화 억제에 미치는 영향)

  • 이미숙;이근보
    • The Korean Journal of Food And Nutrition
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    • v.13 no.6
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    • pp.534-538
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    • 2000
  • Sample frying oil was manufactured from simple mixing treatment of capsicum. butter flavor and silicone resin. the amount were 0.20, 0.15% ($\omega$/$\omega$) and 10 rpm in soybean oil, respectively. This frying oil was confirmed to improving of heat stability as well as removal effect of meat flavor. Frying oil obtained from treatment of capsicum and silicone resin was appeared, acid value and smoke point were 0.301, 232$\^{C}$, than its value in the non-treated soybean oil were 0.385. 220$\^{C}$, respectively, in the case of continuous frying at 185$\pm$2$\^{C}$. These effects were likely to according both anti-oxidation effect of capsicum and inhibition of free fatty acids and smoke production from anti-expansion of surface area in frying oil. Meat flavor and burnt flavor of oil in the frying oil and fried foods were weakened by treating of butter flavor(0.15%, $\omega$/$\omega$), this effect will be produced to new type\`s frying oil product.

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Effect of Lecithin on Dermal Safety of Nanoemulsion Prepared from Hydrogenated Lecithin and Silicone Oil

  • Bae, Duck-Hwan;Shin, Jae-Sup;Shin, Gwi-Su;Jin, Fan-Long;Park, Soo-Jin
    • Bulletin of the Korean Chemical Society
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    • v.30 no.4
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    • pp.821-824
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    • 2009
  • In this study, a hydrogenated lecithin-containing nanoemulsion was prepared from hydrogenated lecithin and silicone oil. Tween-60 and liquid paraffin, widely known emulsifiers, were used as standard substances, and high shear was produced by utilizing a high shear homogenizer and microfluidizer. The properties of the nanoemulsion prepared with hydrogenated lecithin were evaluated by measuring interfacial tension, dynamic interfacial tension, droplet size, zeta-potential, friction force, skin surface hygrometery, and dermal safety. The interfacial tension of lecinol S10/silicone oil was lower than that of lecinol S10/liquid paraffin. The nanoemulsion prepared from hydrogenated lecithin shows lower zeta-potential, skin surface hygrometery, and friction force compared with a general emulsion. The silicone nanoemulsion prepared from hydrogenated lecithin showed a zero value in the patch test and thus exhibits high dermal safety.

Foam Application for Water and Oil Repellent Finishes (거품을 이용한 발수 발유가공)

  • 이정민;배기서;노덕길;김병미;이성애
    • Textile Coloration and Finishing
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    • v.5 no.2
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    • pp.125-133
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    • 1993
  • This study was to investigate the application of foam finishing technology (FFT) for the silicone finishing of cotton fabrics and the tluorochemical finishing of polyester fabrics. The repellency properties, soil resistance properties and selected physical properties were demonstrated and compared the foam finishing with the conventional padding application. Amino-funetional silicone prorided better durability than epoxy-functional silicone and conventional reactive silicone after three launderings. Foam finishing fabrics improved stiffness but showed lower or equivalent water and oil repellency properties, soil resistance properties, tearing strength and abrasion resistance than those of the fabrics treated by conventional padding process. But, it was evident that the foam application of silicone and fluorochemical finishes to the fabrics were feasible.

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Surface Characteristics of Silicone Rubber Processes by Corona Discharges (코로나 방전에 따른 실리콘 고무의 표면 특성)

  • 한동희;조한구;강동필;민경은
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.15 no.2
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    • pp.133-140
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    • 2002
  • This paper aims to investigate the effect of silicone oils as processing agent affecting the loss and recovery of hydrophobicity. The recovery of hydrophobicity was evaluated by the measurement of the surface electrical resistivity and the contact angle on the SIR surface. Two kinds of silicone oils (1 and 2) having different molecular weight were selected under a consideration of hydrophobicity and processability. SIR specimens were exposed to corona discharges in air and the specimens were analyzed with contact angle and surface resistance measurements. It was observed that the contact angle and the surface resistivity of SIR increase gradually with testing time. The fast recovery of hydrophobicity of SIR, expressed by the increment of contact angle and surface resistivity, was showed in SIR2 containing silicone oil 2.

Effect of Antifoam Agents on $\Delta^1$-Dehydrogenation of Hydrocortisone (Hydrocortisonee 의 $\Delta^1$-Dehydrogenation 에서 소포제의 영향)

  • Chung, Bong-Hyun;Son, Jung-Duk;Park, Young-Hoon
    • Microbiology and Biotechnology Letters
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    • v.17 no.3
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    • pp.219-223
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    • 1989
  • Effect of antifoam agents, silicone oil and neolin 302, was investigated on the production of prodnisolone by microbial $\Delta$$^1$-Dehydrogenation of hydrocortisone. The microbial process was conduct-ed by using a pseudo-crystallofermentation. By the hydrophobic-hydrophobic interaction, the steroid crystals aggregated with the antifoam agents. The aggregation resulted in a decrease of total mass transter area of substrate particles which is proportional to the dissolution rate of the solid substrate, and it consequently led to a significant decrease of the bioconversion rate. The bioconversion with neolin proceeded more slowly than with silicone oil. Increase of the concentration of the antifoam agents also yielded a significant decrease of the bioconversion rate.

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Surface Properties of Silane-Treated Titania Nanoparticles and Their Rheological Behavior in Silicone Oil

  • Hwang, Joon-Sik;Lee, Jeong-Woo;Chang, Yoon-Ho
    • Macromolecular Research
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    • v.13 no.5
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    • pp.409-417
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    • 2005
  • The surface of rutile titania nanoparticles was chemically modified by reacting with alkoxy silane. The surface and rheological properties in silicone oil having a wide range of viscosity were investigated. Total surface free energy($\gamma_S$) of the titania particles decreased from 53.12 to 26.94 mJ/$m^2$ as the silane used for surface treatment was increased from 0 to 5.0 wt$\%$. The surface free energy of neat silane was 25.5 mJ/$m^2$, which is quite close to that oftitania particles treated with 5.0 wt$\%$ silane. Due to the hydrophobic nature oftreated-titania, the contact angle was accordingly higher for polar solvent in the order of water>ethylene glycol> formamide>$\alpha$-bromonaphthalene. In sum of rheological behavior, as the applied shear stress or viscosity of the silicone oil increased, the titania particles tend to form layers and agglomerated clusters, showing shear-thinning and shear-thickening behaviors, sequentially. A good dispersion of discrete titania particles obeying a Newtonian flow behavior was achieved at a surface energy or low concentration of silane-treated titania particles in hydrophobic silicone oil.