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NO gas sensing ability of activated carbon fibers modified by an electron beam for improvement in the surface functional group
Mi-Seon Park, Sangmin Lee, Min-Jung Jung, Hyeong Gi Kim, Young-Seak Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 3 19-25 (7 pages)
electron beam under different aqueous solutions to improve the NO gas sensitivity of a gas sensor based on ACFs. The oxygen functional group on the ACF surface is changed, resulting in an increase of the number of non-carbonyl (-C-O-C-) groups from 32.5% for pristine ACFs to 39.53% and 41.75% for ACFs treated with hydrogen peroxide and potassium hydroxide solutions, respectively. We discover that the NO gas sensitivity of the gas sensor fabricated using the modified ACFs as an electrode material... -
Preparation of pitch from pyrolized fuel oil by electron beam radiation and its melt-electrospinning property
Jin-Young Jung, oung-Seak Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 10 129-135 (7 pages)
Spinnable pitch for melt-electrospinning was obtained from pyrolized fuel oil by electron beam (E-beam) radiation treatment. The modified pitch was characterized by measuring its elemental composition, softening point, viscosity, molecular weight, and spinnability. The softening point and viscosity properties of the modified pitch were influenced by reforming types (heat or E-beam radiation treatment) and the use of a catalyst. The softening point and molecular weight were increased in... -
Cellulose-based carbon fibers prepared using electron-beam stabilization
Min Il Kim, Mi-Seon Park, Young-Seak Lee 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.18 9 56-61 (6 pages)
Cellulose fibers were stabilized by treatment with an electron-beam (E-beam). The properties of the stabilized fibers were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The E-beam-stabilized cellulose fibers were carbonized in N₂ gas at 800°C for 1 h, and their carbonization yields were measured. The structure of the cellulose fibers was determined to have changed to hemicellulose and... -
TiN Ion-Plating이 교정용 브라켓의 접착강도에 미치는 영향
김석용(Seok-Yong KIM), 권오원(Oh-Won KWON), 김교환(Kyo-Han KIM) 대한치과교정학회 The Korean Journal of Orthodontics 15 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1997, 제 27권 제 1호 13 157-171 (15 pages)
TiN ion-plating이 교정용 브라켓의 접착강도에 미치는 영향을 알아보기 위하여 세 종류의 서로 다른 기저면형태를 가지는 스테인레스 스틸제의 브라켓을 선택하고, TiN ion-plating 된 브라켓과 ion-plating 되지 않은 브라켓을 치아에 접착시켰을 때 초기 및 장기 접착강도, 접착계면의 주사전자현미경 관찰, 파단면의 주사전자 현미경과 관찰을 비교 분석하여 다음과 같은 결론을 얻었다. • TiN ion-plating을 하지 않은 경우 24시간 후의 접착강도는 Micro-Loc 형이 5.89±1.77 MPa, Foil Mesh 4.27±1.12 MPa,... -
The electrical and heating properties of copper-incorporated graphite fibers fabricated using different ultrasonication techniques
Kyeong Min Lee, Min-Ji Kim, Hanjoo Jo, Sang Young Yeo, Young-Seak Lee 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 15 111-114 (4 pages)
Electrical energy can be converted into heat energy through ohmic joule heating. Metallic materials are typically used in electrical heating elements because of their great electrical conductivity. However, metallic materials have several weaknesses, such as corrosion susceptibility, heavy weight, high manufacturing costs, and electromagnetic wave emissions [1,2]. To resolve these problems, carbon materials with good electrical conductivity, such as carbon fibers, graphite fibers, carbon... -
Fabrication of carbon fiber SMC composites with vinyl ester resin and effect of carbon fiber content on mechanical properties
Haksung Lee, Mongyoung Huh, Jaeyoung Yoon, Dasom Lee, Seonyul Kim, Shinjae Kang 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 11 101-104 (4 pages)
Fiber reinforced composites are being used in the automotive industry and other manufacturing fields. Their properties, including high specific stiffness, strength and weight reduction make fiber composite materials an attractive replacement for metal components. The development of composites like carbon fiber reinforced plastic and related production technologies have contributed to the increasing application of fiber composite materials. Many new components have recently been adapted,... -
Effect of fiber-matrix adhesion on the fracture behavior of a carbon fiber reinforced thermoplastic-modified epoxy matrix
H.J. Carrillo-Escalante, A. ?lvarez-Castillo, A. Valadez-Gonz?lez, P. J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 6 47-56 (10 pages)
(3-glycidoxy propyl trimethoxysilane) coupling agent. Toughness was determined using the double cantilever test, together with surface analysis after failure using scanning electron microscope. The presence of polysulfone particles improved the fracture behavior of the composite, but fiber-matrix adhesion seemed to play a very important role in the performance of the composite material. There appeared to be a synergy between the matrix modifier and the fibermatrix adhesion coupling agent. -
Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method
Dong-Kyu Kim, Kay-Hyeok An, Yun Hyuk Bang, Lee-Ku Kwac, Sang-Yub Oh, Byung-Joo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 4 32-39 (8 pages)
(CFs) on interfacial adhesion between CF and epoxy resin with various current densities. The surface morphologies and properties of the CFs before and after electrochemical-oxidation-treatment were characterized using field emission scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and single-fiber contact angle. The mechanical interfacial shear strength of the CFs/epoxy matrix composites was investigated by using a... -
Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview
Donghwan Cho, Lawrence T. Drzal 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 1 1-11 (11 pages)
high-temperature sizing material for carbon fiber-reinforced polymer matrix composites, PETI-5 imidization and thermal curing behaviors have been extensively investigated based on the phenylethynyl end-group reaction. These studies are reviewed here. In addition, the use of PETI-5 to enhance interfacial adhesion between carbon fibers and a bismaleimide (BMI) matrix, as well as the dynamic mechanical properties of carbon/BMI composites, are discussed. Reports on the thermal expansion behavior of... -
A review: role of interfacial adhesion between carbon blacks and elastomeric materials
Min-Joo Kang, Young-Jung Heo, Fan-Long Jin, Soo-Jin Park 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.18 1 1-10 (10 pages)
Carbon blacks (CBs) have been widely used as reinforcing materials in advanced rubber composites. The mechanical properties of CB-reinforced rubber composites are mostly controlled by the extent of interfacial adhesion between the CBs and the rubber. Surface treatments are generally performed on CBs to introduce chemical functional groups on its surface. In this study, we review the effects of various surface treatment methods for CBs. In addition, the preparation and properties of CB-reinforced... -
Effects of cross-linking methods for polyethylene-based carbon fibers: review
Kwan-Woo Kim, Hye-Min Lee, Jeong-Hun An, Byoung-Suhk Kim, Byung-Gak Min, Shin-Jae Kang, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 24 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 2 147-170 (24 pages)
In recent decades, there has been an increasing interest in the use of carbon fiber reinforced plastic (CFRP) in aerospace, renewable energy and other industries, due to its low weight and relatively good mechanical properties compared with traditional metals. However, due to the high cost of petroleum-based precursors and their associated processing costs, CF remains a specialty product and as such has been limited to use in high-end aerospace, sporting goods, automotive, and specialist... -
Preparation and characterization of carbon fiber-reinforced thermosetting composites: a review
Fan-Long Jin, Soo-Jin Park 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 1 67-77 (11 pages)
Carbon fibers (CFs) have a unique combination of properties which allow them to be widely used as reinforcing materials in advanced polymer composites. The mechanical properties of CF-reinforced polymer composites are governed mainly by the quality of interfacial adhesion between the CFs and the polymer matrix. Surface treatments of CFs are generally carried out to introduce chemical functional groups on the fiber surfaces, which provide the ability to control the surface characteristics of CFs.... -
An overview of new oxidation methods for polyacrylonitrile?based carbon fibers
Hye Kyoung Shin, Mira Park, Hak-Yong Kim and Soo-Jin Park 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 2 11-18 (8 pages)
in determining the mechanical properties of the final carbon fibers, but the most commonly used methods, such as thermal treatment (200°C to 300°C), tend to waste a great deal of process time, money, and energy. There is therefore a need to develop more advanced oxidation methods for PAN precursor fibers. In this review, we assess the viability of electron beam, gamma-ray, ultra-violet, and plasma treatments with a view to advancing these areas of research and their industrial application. -
Effect of stacking sequence on the flexural and fracture properties of carbon/basalt/epoxy hybrid composites
Jae Il Lim, Kyong Yop Rhee, Hyun Ju Kim, Dong Ho Jung 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 9 125-128 (4 pages)
tests were conducted and the fracture surfaces of the carbon/basalt/epoxy hybrid composites were then examined using scanning electron microscopy (SEM). The results showed that the flexural strength and flexural modulus of the CSBC specimen respectively were ~32% and ~245% greater than those of the BSCC specimen. However, the interlaminar fracture toughness of the CSBC specimen was ~10% smaller than that of the BSCC specimen. SEM results on the fracture surface showed that matrix cracking is a... -
친환경 UV/EB 경화형 기능성 코팅 기술
이정복, 이진휘, 성기천, Lee. Jung-Bok, Lee. Jin-Hui, Sung. Ki-Chun 한국유화학회 한국유화학회지 15 Pages
한국유화학회 한국유화학회지 2012, Vol.29 No.1 159-173 (15 pages)
2 종류로 분류할 수 있다. 이 기술은 플라스틱과 금속간의 여러 기재에 대한 기능성을 개선하기 위해서 표면처리기술에 주로 초점이 맞추어져 왔다. 반면에, Electron beam 기술은 새로운 기능성 재료들을 창출하기 위해 중합공정뿐만 아니라 가교반응들을 다루었다. 이들 두 기술들은 종래의 열경화성 코팅과 비교할 때, 에너지이용 효율과 환경 친화적이어서, 건조와 경화 공정으로 부터 배출되는 탄산가스와 휘발성 유기물을 대폭 감소시킨다. 이 논문에서는 UV 경화 코팅에서 흔히 사용되는 라디칼 경화기술과, 최근의 있는 양이온... -
광투과성 지방족 에폭시 아크릴레이트의 전자선 경화 특성 연구
박상율, 손혜미, 명동신, 김명화, 서영수, Park. Sang-Yul, Son. Hyemi, Myung. Dongshin, Kim. Myung-Hwa, Seo. Young-Soo 한국고분자학회 폴리머 6 Pages
한국고분자학회 폴리머 2013, Vol.37 No.3 302-307 (6 pages)
Glycerol diglycidyl ether와 acrylic acid를 반응하여 지방족 에폭시 아크릴레이트를 합성하였다. 반응 경과는 적외선 분광법, 라만 분광법과 $^1H$ NMR로 분석하였다. 합성한 에폭시 아크릴레이트의 전자선 조사에 의한 경화거동을 조사하기 위해 전자선 조사량에 따른 시료의 분광 분석과 유리전이온도 분석, 인장 특성 등을 분석하였다. 이를 통해 약 30 kGy 정도의 저조사량에서 충분한 경화가 이루어짐을 확인하였다. 또한 합성한 에폭시 아크릴레이트는 점도가 낮아 용매 사용 없이 코팅용으로 사용하기에 적합하며, 경화 시편이... -
In-mold Decoration(IMD) 포일용 경질 코팅 수지 설계 및 전자빔 조사가 IMD 포일 구성층에 미치는 영향
심현석, 김건석, 신지희, 이광희, Sim. Hyun-Seog, Kim. Geon-Seok, Shin. Ji-Hee, Lee. Kwang-Hee 한국고분자학회 폴리머 7 Pages
한국고분자학회 폴리머 2012, Vol.36 No.3 268-274 (7 pages)
알루미나 나노 입자의 표면을 처리하였다. 표면을 개질한 나노 입자를 in-mold decoration(IMD) 포일의 경질 코팅 층에 도입하여 표면 경도 및 내마모성을 중심으로 도막의 물성 변화를 평가하였다. 전자빔(electron beam, EB) 조사가 IMD 포일을 구성하는 color layer 및 anchor layer에 미치는 영향을 색도변화와 cross-cut tape 시험을 통하여 평가하였다. 또한 EB 조사 온도에 따른 경화 거동을 표면 물성 변화 평가 및 Fourier transform infrared(FTIR) spectroscopy 관찰을 통해 정량적으로 분석함으로써 EB 경화 공정의 실용화에... -
In-mold Decoration 포일에 사용되는 경질 코팅 수지의 전자빔 경화
심현석, 윤덕우, 김건석, 이광희, 이병철, Sim. Hyun-Seog, Yun. Deok-Woo, Kim. Geon-Seok, Lee. Kwang-Hee, Lee. Byung-Cheol 한국고분자학회 폴리머 5 Pages
한국고분자학회 폴리머 2011, Vol.35 No.2 141-145 (5 pages)
In-mold decoration 포일의 경질 코팅 층에 사용하는 수지를 대상으로 전자빔(electron beam, EB) 경화에 관한 연구를 수행하였다. 시료에 다른 양의 EB를 조사하고 경화 반응 정도를 Fourier transform infrared(FTIR) spectroscopy를 사용하여 관찰하였다. EB 조사선량 증가에 따른 코팅 물성의 변화를 표면 경도와 내마모성을 중심으로 알아보았다. 또한 나노 입자 첨가가 코팅 물성에 미치는 영향을 조사하였다. 본 연구로부터 얻은 실험적 결과는 자외선(ultraviolet, UV) 경화 시스템과 유사한 EB 경화 시스템의 상업적 개발에... -
전자선 가교 방법을 이용한 탄소/탄화규소 복합재 제조 및 특성
신진욱, 전준표, 강필현, Shin. Jin-Wook, Jeun. Joon-Pyo, Kang. Phil-Hyun 한국고분자학회 폴리머 6 Pages
한국고분자학회 폴리머 2009, Vol.33 No.6 575-580 (6 pages)
폴리카보실란에 탄소직물을 보강제로 이용하여 제조한 탄소/탄화규소 복합재는 좋은 내산화 특성과 열 충격에 강한 특성으로 인해 높은 온도의 구조체에 적용되고 있다. 본 연구에서는 고분자 함침 열분해법을 이용하여 탄소직물에 폴리카보실란 용액을 함침한 후, 전자선을 이용하여 가교하고, 열분해 과정을 통해 탄소/탄화규소 복합재로 제조하였다. 실험 결과 복합재 시료의 공극률과 밀도는 각각 13.5%와 $2.44;g/cm^3$을 나타냈고, 내산화 특성은 지속적인 고온의 산화 분위기에서 95.9%의 잔류량을 나타내어 본 연구에서 제조한... -
Flexural properties, interlaminar shear strength and morphology of phenolic matrix composites reinforced with xGnP-coated carbon fibers
Jong Kyoo Park, Jae Yeol Lee, Lawrence T. Drzal, Donghwan Cho 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 5 33-38 (6 pages)
optical and scanning electron microscopic observations. The results were compared with a phenolic matrix composite counterpart prepared without xGnP. The flexural properties and interlaminar shear strength of the xGnP-coated carbon fiber/phenolic matrix composites were found to be higher than those of the uncoated composite. The flexural and interlaminar shear strengths were affected by the particle size of the xGnP, while the particle size had no significant effect on the flexural modulus. It... -
Recent Advances in Carbon-Nanotube-Based Epoxy Composites
Fan-LongJin, Soo-JinPark 한국탄소학회 Carbon Letters 13 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.1 1 1-13 (13 pages)
