전력케이블에서 탄소나노튜브 함량에 따른 반도전층 재료의 특성 연구

梁鍾錫(Jong-Seok Yang),申同訓(Dong-Hoon Shin),李慶龍(Kyoung-Yong Lee),朴大熙(Dae-Hee Park) 대한전기학회 2007 전기학회논문지 Vol.56 No.3

In this paper, we have investigated chemical, mechanical and structural properties by changing the content of carbon nanotube, Which is a component part of semiconductive shield in underground power transmission cable. The multi luminescence spectrometer MLA-GOLDS was used to investigate chemical properties of specimens. Also, the density meter EW-200SG was used to investigate the mechanical properties of specimens, and the FE-SEM S-4300 in Hitachi was used for dispersion of CNT(Carbon nanotube). As a result, the cl intensity, which show the effect of oxidation, was decreased by CNT of 1 [wt%], and the density of semiconductive shield materials with CNT and EEA(Ethylene Ethyl Acrylate) is lower than that for commercial semiconductive shield materials. Also, the properties of dispersion showed an increase according to an increase in the ratio of CNT, and the properties were the best at 5 wt%. Therefore, excellent chemical, mechanical and structural properties can be improved with the small amount of CNT.

충격파압에 의한 콘크리트 방파제의 거동 예측

양종석(Jong-Seok Yang),김성훈(Sung-Hun Kim),김동완(Dong-Wan Kim),경민수(Min-Su Kyung),김장호(Jang-Ho Kim) 한국콘크리트학회 2002 한국콘크리트학회 학술대회 논문집 Vol.2002 No.11

전력케이블용 XLPE절연체/ 나노 반도전층 재료의 열적 특성

양종석(Jong-Seok Yang),최성헌(Sung-hun Choi),박장현(Jabg-Hyeon Park),성백룡(Baek-Ryong Sung),이재형(Jaehyeung Lee),박대희(Dae-Hee Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10

To improve the mean-life and the reliability of power cable, we have investigated specific heat (Cp). Specific-heat measurement temperature ranges of XLPE insulator were from 20[℃] to 90[℃], and the heating rate was 1[℃/min]. In case of semiconducting materials, the measurement temperature ranges of specific heat were from 20[℃] to 60[℃], and the heating rate was 1[℃/min]. From these experimental results, both specific heat were increased by heating rate because volume of materials was expanded according to rise in temperature. We could know that a small amount of CNT has a excellent thermal properties.

에칠렌 에칠 아크릴레이트/탄소나노튜브 복합체의 밀도와 분산성 측정

양종석(Jong-Seok Yang),이경용(Kyoung-Yong Lee),신동훈(Dong-Hoon Shin),성백룡(Baek-Ryong Sung),박대희(Dae-Hee Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7

To improve density and smoothness of semiconducting materials in power cable, we have investigated those of semiconducting materials showed by changing the content of carbon black and Carbon Nanotube. They were produced as sheets after pressing for 20 minutes at 180[℃] with a pressure of 200[㎏/㎠]. The content of conductive carbon black and Carbon Nanotube were 30[wt%] and 2-6[wt%] respectively. As a result the smoothness was measured by JSM-6400.

탄소나노뉴브를 첨가한 나노 반도전층 재료의 기계적/ 열적 특성 변화 연구

양종석(Jong-Seok Yang),이경용(Kyoung-Yong Lee),신동훈(Dong-Hoon Shin),최유진(Yu-Jin Choi),박노준(Noh-Joon Park),박대희(Dae-Hee Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10

To improve Mechanical and Thermal Properties of semiconducting materials in power cable, we have investigated those of semiconducting materials showed by changing the content of carbon black and Carbon Nanotube, Density were measured by EW-200SG. High temperature, heat degradation initiation temperature, and heat weight loss were measured by TGA (Thermogravimetric Analysis). The dimension of measurement temperature was 0[℃] to 700[℃], and rising temperature was 10[℃/min]. Heat degradation initiation temperature from the TGA results was decreased according to increasing the content of Carbon Nanotube, That is, heat stabilities of EVA containing the weak VA (vinyl acetate) against heat was measured the lowest. From the results of the experiment applied in this study, it is evident that a small amount of Carbon nanotube additives significantly improved the Mechanical and Thermal Properties of semiconducting materials.

CNT 함량에 따른 전력케이블용 반도전층 재료의 열적 특성

梁鍾錫(Jong-Seok Yang),李慶龍(Kyoung-Yong Lee),申同訓(Dong-Hoon Shin),朴大熙(Dae-Hee Park) 대한전기학회 2006 전기학회논문지C Vol.55 No.12

In this paper, we have investigated thermal properties by changing the content of carbon nanotube, which is component part of semi conductive shield in underground power transmission cable. Heat capacity (ΔH), glass transition temperature (Tg) and melting temperature (Tm) were measured with the samples of eight, through DSC (Differential Scanning Calorimetry), and the measurement ranges of temperature selected from -100[℃] to l00[℃] with heating temperature selected per 4[℃/min] Also, high temperature, heat degradation initiation temperature, and heat weight loss were measured by TGA (Thermogravimetric Analysis) in the temperature from O[℃] to 700[℃] with rising temperature of l0[℃/min]. As a result, the Glass transition temperatures of the sample were showed near -20[℃]~25[℃], and the heat capacity and melting temperature from the DSC was increased according to increasing the content of carbon nanotube, while, thermal diffusivity was increased according to increasing the content of carbon nanotube. Also, heat degradation initiation temperature from the TGA results was increasing according to increasing the content of carbon nanotube with CNT/EEA. Therefore, heat stabilities of EVA, which contained the weak VA (vinyl acetate), showed the lowest.

CNT/EEA 반도전층 재료와 XLPE 절연체의 열적 특성

梁鍾錫(Jong-Seok Yang),李慶龍(Kyoung-Yong Lee),申同訓(Dong-Hoon Shin),朴大熙(Dae-Hee Park) 대한전기학회 2006 전기학회논문지C Vol.55 No.11

To improve the mean-life and the reliability of power cable, we have investigated specific heat (Cp) and thermal conductivity of XLPE insulator and semiconducting materials in 154[㎸] underground power transmission cable. Specimens were made of sheet form with the seven of specimens for measurement. Specific heat (Cp) and thermal conductivity were measured by DSC (Differential Scanning Calorimetry) and Nano Flash Diffusivity. Specific-heat measurement temperature ranges of XLPE insulator were from 20[℃] to 90[℃], and the heating rate was 1[℃/min]. And the measurement temperatures of thermal conductivity were 25[℃], 55[℃] and 90[℃]. In case of semiconducting materials, the measurement temperature ranges of specific heat were from 20[℃] to 60[℃], and the heating rate was 1[℃/min]. And the measurement temperatures of thermal conductivity were 25[℃] and 55[℃]. From these experimental results, both specific heat and thermal conductivity were increased by heating rate because volume of materials was expanded according to rise in temperature. We could know that a small amount of CNT has a excellent thermal properties.

나노 반도전층 재료의 기계적/화학적 특성 향상에 관한 연구

梁鍾錫(Jong-Seok Yang),申同訓(Dong-Hoon Shin),鞠正鎬(Jeong-Ho Kook),羅昌運(Chang-Woon Nah),朴大熙(Dae-Hee Park) 대한전기학회 2007 전기학회논문지 Vol.56 No.4

In this paper, we have investigated mechanical and chemical properties by changing the content of carbon nanotube, which is component part of semiconductive shield in underground power transmission cable. Specimens were made of sheet with the eight of those for measurement. The condition of specimens was a solid sheet. Chemical properties of specimens was measured by FT-ATR (Fourier Transform Attenuated Total Reflectance). Stress-strain of specimens was measured by TENSOMETER 2000. A speed of measurement was 200[㎜/min], ranges of stress and strain were 400[㎏f/㎝] and 600[%]. We could observe functional group (C=O, carbonyl group) of specimens through FT-ATR. From these experimental result, the concentration of functional group (C=O) was high according to increasing the content of carbon nanotube. We could know CNT/EEA was excellent more than other specimens from above experimental results. In Addition, the elongation ratio was decreased, and yield strength was increased according to increasing the content of carbon nanotube. Also, from these experimental result, we could know that a small amount of CNT/EEA has a excellent mechanical and chemical properties.

DMA와 SEM을 사용한 반도전층 재료의 탄성특성과 평활도 측정

梁鍾錫(Jong-Seok Yang),李慶龍(Kyoung-Yong Lee),崔龍成(Yong-Sung Choi),朴大熙(Dae-Hee Park) 대한전기학회 2005 전기학회논문지C Vol.54 No.10

나노클레이 첨가에 따른 할로겐프리 난연컴파운드의 기계적 특성에 관한 연구

황찬연,양종석,성백용,김지연,박대희,Hwang, Chan-Yun,Yang, Jong-Seok,Sung, Baek-Yong,Kim, Ji-Yeon,Park, Dae-Hee 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.2

In this study, some materials are organized and experimented with variables to obtain the optimum mix proportion for the mechanical property of halogen free flame resistance compound with varying addition of nano clay. Tensile strength, density and stiffness are tested in the room temperature. In this study, unlike existing layered structure, nano clay with tabular structure is used and sufficient stiffness, strength, thermal stability and gas block capability can be achieved with small amount of addition. Tensile strength and elongation test show high rupture strength only in specimens with compatibilizing agents while density test shows average measurement in all the specimens except T-9. It was confirmed that the measurement value according to the additives in compatibilizing agent or in nano clay of hardness test represents similarly.