• 제목/요약/키워드: silicone oils

검색결과 21건 처리시간 0.022초

저점도 실리콘유의 쌍극자 배향과 중합도의 관계 (Relation between the Dipole Orientation and the Degree of Polymerization in Low Viscous Silicone Oils)

  • 조경순;김경환;김왕곤;홍진웅
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1993년도 정기총회 및 추계학술대회 논문집 학회본부
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    • pp.234-236
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    • 1993
  • Dielectric properties of low viscous silicone oils have been investigated as a function of frequency and The increase of polymerization degree was attributed to presence of Si-O-Si bonds and their increased dissociation factor. The application of the Clausius-Mosotti equation on the low viscous silicone oils, it has been previously assumed that the oils were dilute solutions of polar molecules. In the silicone oil the Si-o and O-Si bonds give dipole polarization. Simple relations have been found which dipole moment and activation energy as a function of number of Si atoms in the low viscous silicone oils.

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점도변화에 따른 실리콘유의 전기전도특성 (The Electrical Conduction Characteristics of Silicone oils due to Viscosity Variation)

  • 조경순;홍진웅;신종열;이충호;이수원
    • E2M - 전기 전자와 첨단 소재
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    • 제10권9호
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    • pp.945-951
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    • 1997
  • Inorder to investigated electrical conduction characteristics of silicone oils due to viscosity variation we studied the electrical conduction properties at temperature range of 10~110[$^{\circ}C$] and electrical field from 1 to 1.33$\times$10$^4$[V/cm] The viscosity of used specimens was low viscous(1, 2, 5[cSt]) silicone oils. It was shown the ohmic conduction characteristics in low temperature and low field by Ion dipole and humidity included specimen. And we known the conduction mechanism due to electron injection by Schottky's effect in the high temperature an d high field region.

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점도증가에 따른 절연용 실리콘유의 유전손실 (Dielectric loss of silicone oils for insulation due to the increase of viscosity)

  • 이용우;조경순;김왕곤;홍진웅
    • E2M - 전기 전자와 첨단 소재
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    • 제8권5호
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    • pp.587-593
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    • 1995
  • Silicone oils used insulating substances exhibit the both of organic and inorganic properties, and it has many superior characteristics such as the high thermal resistance and low thermal oxidation level when compared to other insulation oils. In order to investigate the dielectric loss due to the increase of viscosity, silicone oils of viscosity 1, 2, 5[cSt] had been chosen as the specimen and experiment has been performed in the temperature range of -70[.deg. C] - 65[.deg. C] and frequency range of 30 - 1*10$\^$5/[Hz]. As a result, the linear decrease of loss at low frequency region in high temperature was due to the influence of applying frequency, whereas the increase of loss at high frequency region was contributed by electrode's resistance. And increasing viscosity, the activation energy increased from 3.77[kcal/mole] to 7.21[kcal/mole]. The dipole moment of specimen was become clear 1.48 - 2.26[debyel in high temperature region(5 - 65[.deg. C]) and 1.05 - 1.80[debye] in low temperature region (-70 - -25[.deg. C])respectively.

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중합도에 따른 저점도 실리콘유의 유전 특성 (Dielectric Properties of Low Viscosity Silicone Oils with Degree of Polymerization)

  • 조경순
    • 한국전기전자재료학회논문지
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    • 제27권12호
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    • pp.847-851
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    • 2014
  • The characteristics of dielectric constant and $tan{\delta}$ of low viscosity silicone oils with changing degree of polymerization were investigated. The result shows dipole loss mechanism at low temperature range. The dielectric loss in the range of low frequencies are predominantly of ionic nature with temperature increase. The peak of dielectric loss is the detrapping of the electrons which is were trapped in the localized level of the silicone oils at the frequency of 30 kHz. The increase of ionic conduction is attributed to the presence of ionizable oxidation products and their increased dissociation feature. The activation energy ${\Delta}H$ and dipole moment ${\mu}_d$ were increased whit increasing degree of polymerization.

자동차 점화장치용 절연유의 BTA 함유에 따른 유전특성 (Dielectric Characteristics due to BTA in Insulating Liquids for the Ignition Coil of Automobile)

  • 신종열;조돈찬;조경순;이수원;홍진웅
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1997년도 춘계학술대회 논문집
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    • pp.253-256
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    • 1997
  • Recently, mixture insulating oils is widely used in respect that the physical and the electrical properties is more excellentthan mineral oils, such as alkylbenzene oils and silicone oils, and that cost is lower than alkylbenzene oils or silicone oils. Also, it is important to research for the additive BTA(Benzotriazole) as a study for the phenomena of streaming electrification of mineral oils. So, mixture insulating oils class 7-2, is selected as a specimen in this experiments, and the contents of BTA in specimen are 0.2[ppm], 10[ppm] and 30[ppm], respectively. Then, the physical and the electrical properties for each specimen is made researches.

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실리콘 고무의 소수성에 미치는 첨가된 실리콘 오일의 영향 (Effects of Added Silicone Oils on the Surface Hydrophobicity of Silicone Rubber)

  • 한동희;조한구;강동필;민경은
    • 한국전기전자재료학회논문지
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    • 제19권1호
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    • pp.46-51
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    • 2006
  • This paper reports on the effects of silicone oils, used as processing agents, on the recovery of hydrophobicity of silicone rubber. The recovery of hydrophobicity was evaluated by the measuring the contact angle, the surface electrical resistance and SEM. Here, we formed artificial contamination on the surface of samples, which scratched by sand papers and alumina powders. There was small recovery of hydrophobicity on the surface of SIR-A that silicone oil was not added. In both oil-added samples, SIR-B and SIR-C, recovery of hydrophobicity was achieved greatly. The surface of SIR-C showed that a lot of silicone oil was observed due to migration of oil, relatively in comparison with SIR-B. The tendency of recovery of hydrophobicity expressed by contact angle was in a good agreement with electrical property as determined by surface resistivity.

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

  • 한동희;조한구;강동필;민경은
    • 한국전기전자재료학회논문지
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    • 제15권2호
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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.

파라벤류에 대한 오일의 분배계수와 실제 방부력과의 상관관계 연구 (A Study of the relationship between partition coefficients of oils and antimicrtobial effects)

  • 한종섭;김종일
    • 대한화장품학회지
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    • 제21권2호
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    • pp.94-111
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    • 1995
  • Paraben에 대한 Oil의 분배계수를 측정하고, 실제 에멀젼을 제조하여 방부력을 비교 측정하였다. 분배계수측정은 Hydrocarbon, Ester, Silicone Oil류로 분류하여 실험을 하였으며, Stirring Time, Temperature, Volume ratio에 따른 최적실험조건을 결정하여 실험을 수행하였다. 각각의 oil 종류에 따라 분배계수 값의 차이가 많았으며, 특히 Ester oil 류의 분배계수 값이 다른 오일 류에 비해 상당히 높음을 알 수 있었고, 오일의 Paraben에 대한 분배계수에 Propylene Glycol이 좋은 효과를 나타냄을 관찰하였다. 또한 각각의 오일을 주 처방으로 한 에멀젼을 제조하여, Challenge test에 주로 사용하는 5종의 미생물을 접종하여 균의 사멸속도를 비교한 결과, 분배계수가 낮은 오일을 함유한 에멀젼일수록 빠른 사멸속도를 보여주었다.

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Potato Chip 제조시 TBHQ 와 Silicone 첨가유에 의한 저장 연장 효과 (Storage Effectiveness of Deep-Fried Potato Chip Prepared with Canola Oil Fortified with TBHQ and Silicone)

  • 정병두;이순재
    • 한국식품과학회지
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    • 제29권4호
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    • pp.635-640
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    • 1997
  • Potato chip을 제조시 canola유를 선택하여 potato chip을 제조하는 과정에서 발생하는 potato chip의 기름 함량이 40%정도까지 흡수하게 되는데 이 흡수된 기름이 저장과 유통되는 동안 potato chip의 품질을 유지하는데 결정적인 영향을 주므로 항산화제인 BHA, BHT, TBHQ와 silicone유를 첨가한 첨가 유의 항산화제 효과를 관능 검사와 함께 비교 고찰하였다. Potato chips에서 추출한 oil의 항산화제 효과는 canola oil+TBHQ (0.02%)+silicone (10 ppm)에서 가장 우수한 항산화 효과가 있었고 다음은 canola oil+TBHQ로 안정한 것으로 나타났으며 항산화제를 단독으로 사용한 것보다 silicone을 첨가한 것이 탁월한 안정성을 보였고 항산화제로서 TBHQ가 매우 효과가 있었고 silicone를 첨가한 유지에서 탁월한 저장 안정성을 유지하는 것으로 나타났다. 관능검사 결과 canola oil은 2개월부터 overall, flavor, aftertaste의 변화에 약간의 유의차를 나타내었으며 TBHQ과 silicone을 첨가한 oil는 2개월에서는 전 항목에서 변화가 없었고 4개월부터 overall, flavor, freshness, aftertaste의 항목에서 유의차를 나타내었으며 따라서 2개월 정도 저장 안정성이 연장되는 효과가 있는 것으로 나타났다.

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초고압 옥외용 실리콘 고무의 발수성 및 트래킹 특성 (Hydrophobicity and tracking resistance of SIR for outdoor Insulators)

  • 한동희;강동필;박효열;이광희;이기창;민경은
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 C
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    • pp.1560-1562
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    • 2000
  • The paper reports on a study of the influence of the silicone oils on the tracking and erosion resistance and hydrophobicity of SIR. Two silicone oils(A, B) having different chemical structure were selected in consideration of goof hydrophobicity and processability. Tracking and erosion resistance of SIR was investigated by the rotating wheel dip test (RWDT). In this test tracking and erosion areas due to glow and partial arc discharges cause an increase in the leakage current with an increase in time. Leakage current of SIR was decreased with increasing ratio of oil A/B. SIR was exposed to corona discharges in air and the specimens were analyzed with contact angle. It was observed that the contact angle of SIR was increased gradually in time. The recovery of hydrophobicity was increased with increasing ratio of oil A/B.

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