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Effect of the surface modification using MWCNTs with different L/D by two different methods of deposition on the IFSS of single carbon fiber-epoxy resin composite
Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 3 18-27 (10 pages)
Multiwall carbon nanotubes (MWCNT) with two different (L/D) aspect ratios (7±2 μm/140±30 nm and 0.5?2 μm/8?15 nm) were surface treated using nitric acid (HNO3) and polyethyleneimine (PEI) prior to their deposition on carbon fibers (CF). Before the hierarchical reinforcement with CF-MWCNT, the CFs were treated with 3-glycidoxypropyltrimethoxysilane, a coupling agent (Z6040) and with poly(amidoamine) (PAMAM) a dendrimer containing an ethylenediamine core and amine surface groups. The MWCNT... -
Comparison of Anthropometric Measurements of Oriental and Caucasian Females for Sizing Systems
허갑섬, Hu. Kap-Sum 한국의류학회 한국의류학회지 7 Pages
한국의류학회 한국의류학회지 1985, Vol.9 No.3 1-7 (7 pages)
인체계측치 중에서 각각 32항목을 선출하여 비교된 것은 높이항목과 길이항목(height-related measurements; height and length), 나비항특(surface measurements; breadth and depth) , 둘레항목(measurement of circumference)이다. 32항목을 평균치의 t-test로 동양인과 서양인을 비교한 결과, 모든 항목에서 P<.001 수준에서 유의한 차를 보였다. 그 중에서 머리둘레, 목둘레, 손목둘레, 팔굼치둘레, 손바닥둘레의 항목에서는 동양인이 서양인에 비해서 큰 값을 나타냈다. 그 외에 27개 항목은 동양인이 전부 높거나, 길거나, 또는... -
Clinics : Transjugular occlusion of patent ductus arteriosus using an Amplatz canine ductal occluder in a Cocker spaniel dog
Ran Choi , Changbaig Hyun 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 5 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2010, 제 50권 제 1호 8 49-53 (5 pages)
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Acute Pulmonary Responses in Vivo to Silica Complexed with H+, Zn2+, or Fe3+
JiheeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.2 8 183-189 (7 pages)
This investigation is to determine whether the surface complexation of iron influence acute pulmonary responses induced by silica. For this study, three varieties of cation complexed silica were used: silica-H, -Zn2, and -Fe3, since the first two are not active in the transport of electrons and generate little free radicals relative to the dust with the surface iron. Rats (270 to 280 g) were intratracheally (IT) instilled with saline, silica-H, -Zn2, or... -
Inducible Nitric Oxide Synthase mRNA Expression and Nitric Oxide Production in Silica-Induced Acute Inflammatory Lung Injury
JiheeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.2 12 233-239 (7 pages)
Stimulated alveolar macrophages and neutrophils produce nitric oxide, a free radical by an inducible nitric oxide synthase(iNOS), which reacts with superoxide anion to form peroxynitrite, a more highly reactive toxic species. The objectives of the present study were to evaluate acute inflammatory lung injury and to determine iNOS mRNA induction and nitric oxide production by rat broncho-alveolar lavage cells following intratracheal treatment of silica. After 4 h exposure to silica, differential... -
Platelet-Activating Factor Enhances Interleukin-1 Activity by Alveolar Macrophages Inhibition by PAF Specific Receptor Antagonists
JiheeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.2 10 201-208 (8 pages)
It is becoming increasingly clear that the inflammatory reaction can be ascribed to a complex array of mediators generated and released from activated phagocytes. In this study, the effect of PAF on interleukin-1(IL-1) activity by rat alveolar macrophages(AM) was examined using thymocyte proliferation assay in the supernate of sample obtained after 24 hr culture. When AM were cultured with PAF alone, no change in IL-1 activity was observed. However, the combined addition of PAF and muramyl... -
Effects of In Vitro Exposure to Silica on Bioactive Mediator Release by Alveolar Macrophages
Lee, Ji-Hee 대한생리학회 대한생리학회지 12 Pages
대한생리학회 대한생리학회지 1995, 제 29권 제 1호 1 1-12 (12 pages)
Alveolar macrophages play a pivotal role in the pathogenesis of silicosis since the macrophages may release a wide variety of toxic and inflammatory mediators as well as mitogenic growth factors. In the present study, the effects of in vitro exposure to silica on release of various mediator such as reactive oxygen species, platelet activating factor(PAF), and interleukin-1 (IL-1) by alveolar macrophages were examined. First, hydrogen peroxide release from alveolar macrophages was monitored by... -
Graphitization of PAN-based carbon fibers by CO₂ laser irradiation
Liangbo Yao, Weimin Yang, Sanyang Li, Yang Sha, Jing Tan, Ying An, Haoyi Li 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 13 97-102 (6 pages)
of CF. The obtained Raman spectra indicate that the outer surface of CF evolves from turbostratic structures into a three-dimensional ordered state after being irradiated by a laser. The X-ray diffraction data revealed that the growth of crystallite was parallel to the fiber axis, and the interlayer spacing d002 decreased from 0.353 to 0.345 nm. The results of scanning electron microscopy revealed that the surface of irradiated CFs was rougher than that of the unirradiated ones and there were... -
Mechanical and electrical properties of epoxy resin/epoxidized castor oil/carbon fiber cloth composites
Fan-Long Jin, Heng Zhang, Shan-Shan Yao, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 12 105-109 (5 pages)
Carbon fibers (CFs) have a unique combination of outstanding mechanical, physical, and chemical properties and are among the materials most frequently used in the preparation of a large variety of composites [1-5]. CF-reinforced polymer composites have been widely used in many advanced technological fields, such as aerospace, engineering, sporting goods, automobiles, and marine industry during the past few decades due to their excellent properties, including high strength-to-weight ratios, light... -
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)
In this study, the fracture behavior of a thermoplastic-modified epoxy resin reinforced with continuous carbon fibers for two levels of fiber-matrix adhesion was performed. A carbon fiber with commercial sizing was used and also treated with a known silane, (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... -
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... -
Mechanical interfacial adhesion of carbon fibers-reinforced polarized-polypropylene matrix composites: effects of silane coupling agents
Woong-Ki Choi, Hyun-Il Kim, Shin-Jae Kang, Young Sil Lee, Jong Hun Han, Byung-Joo Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 12 79-84 (6 pages)
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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)
In the present study, exfoliated graphite nanoplatelets (xGnP) with different particle sizes were coated onto polyacrylonitrile-based carbon fibers by a direct coating method. The flexural properties, interlaminar shear strength, and the morphology of the xGnP-coated carbon fiber/phenolic matrix composites were investigated in terms of their longitudinal flexural strength and modulus, interlaminar shear strength, and by optical and scanning electron microscopic observations. The results were... -
Activated carbons prepared from mixtures of coal tar pitch and petroleum pitch and their electrochemical performance as electrode materials for electric double-layer capacitor
Eunji Lee, Soon Hyung Kwon, Poo Reum Choi, Ji Chul Jung, Myung-Soo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 2 78-85 (8 pages)
Activated carbons (ACs) were prepared by activation of coal tar pitch (CTP) in the range of 700°C-1000°C for 1-4 h using potassium hydroxide (KOH) powder as the activation agent. The optimal activation conditions were determined to be a CTP/KOH ratio of 1:4, activation temperature of 900°C, and activation time of 3 h. The obtained ACs showed increased pore size distribution in the range of 1 to 2 nm and the highest specific capacitance of 122 F/g in a two-electrode system with an organic... -
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)
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. In this study, we review recent experimental studies concerning various surface treatment methods for CFs. In addition, direct examples of the preparation and properties of CF-reinforced thermosetting composites are discussed. -
Tensile Properties and Morphology of Carbon Fibers Stabilized by Plasma Treatment
이승욱, 이화영, 장성연, 조승무, 이훈수, 이성호 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2011, Vol.12 No.1 3 16-20 (5 pages)
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A Structural Study of the Oxidized High Modulus Pitch Based Carbon Fibers by Oxidation on Carbon Dioxide
Jae-Seung Roh 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2004, Vol.5 No.1 6 27-33 (7 pages)
탄소섬유의 기계적,전기적 특성은 섬유를 구성하는 결정립의 구조인자에 의해 결정되는데, 구조인자로 면간거리 d, 육각고리구조를 이루고 있는 탄소원자 평면 층의 적층된 수직높이로 표현되는 결정립 크기Lc, 그리고 탄소원자 평면 층의 길이로 표현되는 결정된 직경 La이며, 이런 구조 인자의 지식은 탄소섬유의 특성뿐 아니라 흑연화, 탄소화, 가스화 등과 같은 다양한 제조공정을 이해하는데 매우 중요하다. -
마닐라의 홍수저감을 위한 잡용수 대체자원으로서의 가정용우수저류시설 분석
Imee V. Necesito, Micah Lourdes A. Felix, Lee-Hyung Kim, Tae Sung Cheong, Sangman Jeong 한국습지학회 한국습지학회지 9 Pages
한국습지학회 한국습지학회지 2013, Vol.15 No.2 8 223-231 (9 pages)
전 세계 적으로 발생하고 있는 국지성 집중호우, 가뭄, 혹서, 태풍, 해수면 상승 등과 같은 징후는 기후변화가 진행되고 있음을 보여준다. 이러한 기후변화로 인해 일정빈도이상의 과도한 강우가 발생하면 필리핀의 마닐라는 높은 도시화와 홍 수에 취약한 구조 때문에 홍수피해가 빈번하게 발생한다. 마닐라의 홍수조절 기능 및 생활용수 공급은 Angat댐을 통해서 만 관리되기 때문에 홍수방지와 원활한 물공급을 위해 가정용우수저류시설은 최적의 대체자원이 될 수 있다. 가정용우수 저류시설에 의해 공급되는 물은 여과 및 살균과... -
동경에서 텍사스까지 : 야스히로의 동경이야기와 조지 스티븐스의 자이언트에 나타난 가족 관계
김영걸 이화여자대학교 교과교육연구소 교과교육학연구 36 Pages
이화여자대학교 교과교육연구소 교과교육학연구 2000, 제 6권 6 117-152 (36 pages)
레오 톨스토이의 안나 카레리나는 세계 명작 중에서 가장 유명한 서문중 하나인 “행복한 가족은 모두 비슷하고 모두 불행한 가족은 나름대로 불행한 것이다.”라고 이야기를 시작한다. 본 논문은 매 우 다른 특성을 지닌 두 가정, 즉 야스히로 오즈의 동경 이야기와 에드나퍼버의 베스트 셀러 소설에 기초한 조지 스티븐스의 자이언트란 영화에 나타난 일본의 히라야마 일가와 미국 텍사스의 베네딕트 일가를 탐구해봄으로써 이 서문의 진실을 특히 그 두 번째 부분에 초점을 두어 심층 분석해보고자 한다. 겉으로는 어떠한 두 가족도 더... -
에테르화 및 에스테르화를 통한 표면사이징용 변성 전분의 제조
정영빈, 이학래, 윤혜정, 지경락, 김영석, Jeong. Young Bin, Lee. Hak Lae, Youn. Hye Jung, Ji. Kyoung Rak, Kim. Young Seok 한국펄프종이공학회 펄프 종이기술 6 Pages
한국펄프종이공학회 펄프 종이기술 2014, Vol.46 No.6 50-55 (6 pages)
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산화에스테르전분과 첨가제를 활용한 잉크젯용지의 품질개선
정광호, 정영빈, 이학래, Jung. Kwang Ho, Jeong. Young Bin, Lee. Hak Lae 한국펄프종이공학회 펄프 종이기술 6 Pages
한국펄프종이공학회 펄프 종이기술 2013, Vol.45 No.4 21-26 (6 pages)
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산화에스테르전분을 이용한 표면사이징 공정의 건조에너지 저감
정영빈, 이학래, 윤혜정, 정광호, 지경락, 김영석, Jeong. Young Bin, Lee. Hak Lae, Youn. Hye Jung, Jung. Kwang Ho, Ji. Kyoung Rak, Kim. Young Seok 한국펄프종이공학회 펄프 종이기술 7 Pages
한국펄프종이공학회 펄프 종이기술 2013, Vol.45 No.4 9-15 (7 pages)
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PVOH와 polyDADMAC 첨가에 의한 산화전분의 표면사이징 효과 변화
서동일, 정영빈, 정광호, 이학래, 윤혜정, Seo. Dongil, Jeong. Young Bin, Jeong. Kwang Ho, Lee. Hak Lae, Youn. Hye Jung 한국펄프종이공학회 펄프 종이기술 8 Pages
한국펄프종이공학회 펄프 종이기술 2013, Vol.45 No.4 1-8 (8 pages)
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원지의 사이징 특성이 도공액의 침투에 미치는 영향
김봉용, Kim. Bong Yong 한국펄프종이공학회 펄프 종이기술 6 Pages
한국펄프종이공학회 펄프 종이기술 2013, Vol.45 No.1 21-26 (6 pages)
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표면사이징용 전분의 점도 특성이 라이너지의 표면사이징 효과에 미치는 영향
정영빈, 이학래, 윤혜정, 정광호, 류훈, Jeong. Young Bin, Lee. Hak Lae, Youn. Hye Jung, Jeong. Kwang Ho, Ryu. Hoon 한국펄프종이공학회 펄프 종이기술 9 Pages
한국펄프종이공학회 펄프 종이기술 2012, Vol.44 No.5 54-62 (9 pages)
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내첨 전분을 이용한 표면사이징 대체에 관한 기초연구(제1보)
김철환, 이지영, 백경길, 이영록, 정호경, 이희진, 곽혜정, Kim. Chul-Hwan, Lee. Ji-Young, Back. Kyung-Kil, Lee. Young-Rok, Chung. Ho-Kyung, Lee. Hui-Jin, Gwak. Hye-J 한국펄프종이공학회 펄프 종이기술 6 Pages
한국펄프종이공학회 펄프 종이기술 2009, Vol.41 No.2 20-25 (6 pages)
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양성고분자에 의한 표면사이징과 이에 의한 도공층의 구조 및 도공지 물성 변화
전대구, 이학래, Jun. Dae-Gu, Lee. Hak-Lae 한국펄프종이공학회 펄프 종이기술 8 Pages
한국펄프종이공학회 펄프 종이기술 2008, Vol.40 No.1 1-8 (8 pages)
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양성고분자를 이용한 표면사이징을 통한 도공지의 물성 개선
이학래, 전대구 한국펄프종이공학회 펄프 종이기술 8 Pages
한국펄프종이공학회 펄프 종이기술 2003, Vol.35 No.3 21-28 (8 pages)
