• Korean Journal of Remote Sensing
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• v.39 no.6_1
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• pp.1505-1515
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• 2023

As extreme weather events caused by climate change are occurring around the world, blue carbon has recently been gaining attention as a carbon sink. Blue carbon has been officially recognized by the Intergovernmental Panel on Climate Change (IPCC) as a means of reducing greenhouse gases, and various studies are underway to discover new blue carbon sources both domestically and internationally. Domestic blue carbon research is centered on carbon absorption and storage in tidal flats, which account for most of the coastal wetlands, but there is a lack of research on spatial information. This study utilized the carbon storage of tidal flats from previous studies and converted it into location and spatial information for each basin of the Geumgang and Nakdong rivers. In addition, a proxy value of carbon storage per area by basin was calculated to compare and analyze the total carbon storage of various tidal flats in Korea and abroad. As a result of the analysis, both the Geumgang and Nakdong River basins showed different amounts of carbon storage depending on the tidal flats data, with the highest amount in the Geumgang basin coming from the National Ocean Survey (469,810.1 Mg C) and the highest amount in the Nakdong River basin coming from the Ministry of Environment (217,145.01 Mg C). The results of this study can be used as a basis for future research on the establishment of domestic blue carbon spatial information.

• Applied Chemistry for Engineering
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• v.4 no.3
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• pp.522-529
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• 1993

To raise the utilization of precious platinum currently used as catalyst for PAFC's electrode, it is very important to make fine particles of platinum. This study, for preparing highly dispersed platinum catalyst on carbon black, method. And then loading yield of platinum catalyst on carbon black and the particle size were investigated by DCP and XRD and/or TEM respectively. The colloid method by which platinum particle size could be reduced as small as below $30{\AA}$ showed the best result among them, and the loading yield of platinum catalyst on carbon black was above 99%.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.5
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• pp.2511-2515
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• 2013

Carbon black from pyrolysis of waste tires was used to modify and improve the fatigue properties and low temperature cracking of asphalt binder. 0%, 5%, 10%, 15% and 20% of pyrolyzed carbon black was mixed. Couple of laboratory tests, such as dynamic shear rheometer test and bending beam rheometer test, were carried out. The use of pyrolyzed carbon black decreased the fatigue at room temperature and improved the resistance of low temperature cracking up to $-12^{\circ}C$, but, was off the criteria at $-18^{\circ}C$.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2001.07a
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• pp.219-219
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• 2001

최근 정전기 방지 및 전자파 차폐재료로 주목받고 있는 전도성 고분자를 절연체 고분자 표면에 코팅하여 정전기 방지 포장용으로 사용되는 투명 대전방지 고분자 쉬트 및 필름을 개발하였다. 현재 사용하고 있는 정전기 방지 포장용 고분자는 폴리스티렌이나 폴리비닐에 카본블랙을 혼합하거나 또는 계면활성제를 표면 에 코팅하여 사용하였다. 그러나 카본블랙을 섞은 경우는 카본입자가 불순물로 작용하여 제품을 오염시키고 검은색 불투명이기 때문에 포장 후 제품을 확인 할 수 없으며 카본 혼합에 따른 기저수지의 물성 약화 가 문제가 되고 있으며 계면활성제를 혼합하거나 코팅하여 사용하는 경우는 시간이 지남에 따라 전도성이 소멸되며 입자가 표면으로 blooming out되어 제품을 오염시키는 단점을 가지고 있다. 본 기술 개발에 의하여 얻어진 투명 전도성 고분자 쉬트 및 필름은 기저수지가 투명할 경우 550nm에서 투명도를 5% 이하로 감소시키며 전도성 물질로 고분자를 사용하기 때문에 영구적인 전도성을 가지며 기저 고분자의 물성을 그 대로 유지 할 수 있는 장점을 가지고 있다. 본 개발품은 전자 부품 및 반도체 포장용 트레이, 캐리어 소재 및 정전기 방지를 필요로 하는 모든 분야에 사용될 수 있으며 전도성 부여 처리기술을 가지고 있기 때문에 포장, 운반 목적 외에 여러 가지 정전기 방지 처리분야에 적용이 가능하다.

• Applied Chemistry for Engineering
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• v.5 no.6
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• pp.943-948
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• 1994

The properties of uncured rubber compound and swelling behavior of cured rubber compound with carbon black(N33O grade) increment. Bound Rubber content(BRC) increased according to carbon black increment and ${\alpha}_f$, behavior of uncured rubber compound filled with carbon black, was 1.46. Carbon black added to rubber compound showed behavior of spherical particle by bound rubber. The $C_1$ values of cured rubber compounds, which measured by the stress-strain method of Mooney-Rivlin, increased with carbon black increment.

• 한국신재생에너지학회:학술대회논문집
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• 2008.10a
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• pp.37-39
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• 2008

본 연구에서는 저온 데칼 전사법을 이용하여 막 전극 접합체(Membrane Electrode Assembly, MEA)를 제조하였다. 제조된 MEA는 직접 메탄올 연료 전지(Direct Methanol Fuel Cell, DMFC)를 이용하여 성능 테스트를 하였다. 저온 데칼 전사법은 $140^{\circ}C$의 낮은 온도에서 촉매 층을 데칼 기판에서 멤브레인으로 전사시키고, 전사된 촉매 층의 표면에 형성되는 것으로 알려진 이오노머 스킨 층의 형성을 막기 위해 이오노머/촉매/카본/기판의 구조로 되어 있는 데칼 기판을 사용한다. 저온 데칼 전사법으로 제조 된 카본 층이 있는 MEA의 DMFC 성능이 카본 층이 없이 데칼 전사법으로 제조된 MEA나 전통적인 고온 데칼 전사법으로 제조된 MEA, 또는 직접 스프레이 코팅법으로 제조된 MEA의 성능보다 높게 나온 것을 알 수 있다. 저온 데칼 전사법으로 제조된 MEA의 DMFC 성능이 향상된 것은 촉매 층 위에 이오노머 스킨이 형성되지 않아 반응물의 확산이 원활하게 이루어지기 때문이다. 이를 위한 특성 분석으로 EIS, CV를 측정하였다.

• Polymer(Korea)
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• v.26 no.3
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• pp.367-374
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• 2002

Electrical characteristics of crystalline polymer composites filled with nano-sized carbon black particle were studied. The developed composite system exhibited a typical positive temperature coefficient resistance (PTCR) characteristic, where the electrical resistance sharply increased at a specific temperature. The PTCR effect was sometimes followed by a negative temperature coefficient resistance (NTCR) feature with temperature, which seemingly caused by the coagulation of nano-sized carbon black particles in the excessive quantity. The PTCR temperature was controlled by the carbon black content and the external voltage. The change of electric conductivity was shown as a function of carbon black content, and the resistance was constant when the carbon black content was over 20 wt%. The room-temperature resistance was maintained by a repeated heating and cooling. The excellent PTCR characteristic was demonstrated by the low resistance in the initial stage and the instantaneous heating capability.

• Polymer(Korea)
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• v.31 no.1
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• pp.80-85
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• 2007

Maleic anhydride (MA) modified ethylene-propylene-diene terpolymer (MEPDM) was pre-pared from solution polymerization. MEPDM-g-PST copolymer was prepared by melt polymerization of male ate d EPDM and quaternary ammonium silyl polydimethylsiloxane -7,7,8,8- tetracyanoquinodimethane (TCNQ) adduct (PST) in internal mixer and MEPDM-g-PST/HDPE/CB (MPEC) was prepared by com-pounding HDPE, MEPDM-g-PST copolymer and carbon black (CB, 5, 10, 15, and 20 phr), and HDPE/ CB (PEC) by compounding HDPE and CB (5, 10, 15, and 20 phr), respectively. The structure of MEPDM-g-PST copolymer was confirmed by measuring the FTIR. The maximum grafting ratio of MA onto EPDM was 2.35%. The thermal and mechanical properties of the composites were measured and dispersion characteristics of CB in matrix show that CB in MPEC was better dispersed than that in PEC composite.

• Elastomers and Composites
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• v.34 no.3
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• pp.222-228
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• 1999

In this work, the effect of chemical treatments on the carbon blacks as-received has been studied in the context of surface, adsorption, microstructure properties, and physical surface free energetics. As an experimental result, the basic chemical treatment leads to an increase in the either dispersive or specific component without significant change the pH and specific surface area. While, acidic chemical treatment do significantly change the surface and adsorption properties, and microstructures of the carbon blacks. In particular, the result given by basic chemical treatment shows an increase of the London dispersive component of the surface free energy which is a major parameter in evaluating the dispersion or specific surface area of the carbon blacks studied. This is probably a major role in evaluating the dispersion the carbon blacks, which are reinforced in elastomer matrix in a composite system.

• Journal of the Korean Electrochemical Society
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• v.21 no.1
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• pp.1-5
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• 2018

In this study, boron - doped carbon was prepared by reducing carbon dioxide ($CO_2$) at high temperature by using sodium borohydride ($NaBH_4$). The boron - doped carbon was coated on carbon felt and applied as an electrode for a vanadium redox battery cell. As a result of electrochemical performance evaluation, reversibility of carbon felt coated with boron doped carbon compared to pure carbon felt was improved by about 20% and charge transfer resistance was reduced by 60%. In the charge / discharge results, energy density and energy efficiency were improved by 21% and 12.4%, respectively. These results show that carbon produced by reduction of $CO_2$ can be used as electrode material for redox flow battery.