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전체 선택해제
총 108건 검색
본문검색 결과만 보기
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Dynamic Fracture Toughness of Chevron-notch Ceramic Specimens measured in Split Hopkinson Pressure Bar
Lee. Yeon-Soo, Yoon. Young-Ki, Yoon. Hi-Seak 한국정밀공학회 International journal of the Korean society of precision engineering 7 Pages
한국정밀공학회 International journal of the Korean society of precision engineering 2002, Vol.3 No.3 69-75 (7 pages)
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Comparison of Absorbable Mesh Plate versus Titanium-Dynamic Mesh Plate in Reconstruction of Blow-Out Fracture: An Analysis of Long-Term Outcomes
Baek. Woon Il, Kim. Han Koo, Kim. Woo Seob, Bae. Tae Hui 대한성형외과학회 Archives of plastic surgery 7 Pages
대한성형외과학회 Archives of plastic surgery 2014, Vol.41 No.4 355-361 (7 pages)
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The effect of hip joint exercise using an elastic band on dynamic balance, agility and flexibility in healthy subjects
Dong Hyun Kang, Woo Hyung Lee, Song Lim, Yu Yeong Kim, Soung Wook An, Chang Gyeong Kwon, Gyeong Hee Lee, Nu Ri Choi, Na Yeong Lee, Bo Min 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 4호 6 198-204 (7 pages)
significant differences in the TUG test, standing long jump and the Schober’s test (5cm, 10 cm) after training (p<0.05). However, there was no significant difference between the HFE group and the HAE group. Conclusions: Flexion and abduction exercises of the hip joint using and elastic band increased dynamic balance, agility, and flexibility in healthy subjects. Additional research on hip joint exercises using an elastic band for improving dynamic balance, agility and flexibility are necessary. -
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... -
Various Dynamic Behavior of Three Point Bend Specimens under Rapid Loading
이억섭, 조재웅, 한문식, Lee. Ouk-Sub, Cho. Jae-Ung, Han. Moon-sik 한국정밀공학회 한국정밀공학회지 11 Pages
한국정밀공학회 한국정밀공학회지 1999, Vol.16 No.4 178-188 (11 pages)
충격하중을 받는 시험편 높이의 1/4 길이의 notch를 가진 3점 굽힘시험편들의 기계적 거동에 관한 컴퓨터 시뮬레이션을 하고 이 시뮬레이션에 대한 실험적 검증도 하여 그 타당성을 입증하였다. 시험편들의 양쪽 가장자리(지지점)에서 작용되어지는 여러 가지의 하중속도에 대한 경우들과 탄소성 von Mises 재질인 모델들을 시뮬레이션에 포함시켰으며 이들에 대한 결과들을 간극 개구 변위, 반력, 크랙선단 개구 변위 및 변형률등이 속도에 의존되는 재질(점소성 재질)에 대한 시뮬레이션 결과와 비교하였다. 또한 여러가지의 동적... -
Tibial Fracture Repair in a Black Gibbon (Hylobates concolor)
윤헌영, 이보라, 정순욱, Yoon. Hun-Young, Lee. Bo-Ra, Jeong. Soon-Wuk 한국임상수의학회 Journal of veterinary clinics 3 Pages
한국임상수의학회 Journal of veterinary clinics 2009, Vol.26 No.6 644-646 (3 pages)
5년령의 체중 4.58 kg 수컷 긴 팔 원숭이가 후지 파행 증상으로 건국대학교 동물 병원에 내원하였다. 신체 검사에서 우측 후지 경골 부위의 연부조직 손상을 보였으며 방사선 사진에서 우측 경골과 비골의 단순 골절이 관찰되었다. 개방형 정복을 실시한 후 tubular dynamic compression plate와 나사를 이용한 고정을 실시하였다. 수술 9주 후 방사선 사진 검사에서 잘 발달된 가골 형성이 골절 부위 피질에서 관찰되었다. 수술 3개월 후 후지 파행 증상을 보이 지 않고 정상 보행이 가능하였다. -
An efficient finite element modeling of dynamic crack propagation using a moving node element
Kwon. Y.W., Christy. C. 테크노프레스 Structural engineering and mechanics : An international journal 12 Pages
테크노프레스 Structural engineering and mechanics : An international journal 1994, Vol.2 No.2 173-184 (12 pages)
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Effects of balance imagery of semi-tandem stance on a flat floor and balance beam for postural control
Jeong-Weon Lee, Su-jin Hwang 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 2호 5 87-93 (7 pages)
Objective: Balance is a preceding task for functional activities in daily activities as well as community-dwelling activities. To learn skilled and functional activities, it is also necessary to imagine an appropriate and effective movement representation used to plan and execute the functional activities. The purpose of this study was to evaluate the effects of balance imagery of semi-tandem stance on a flat floor and balance beam on balance abilities for elderly and young adults. Design:... -
Ultrasound imaging for age-related differences of lower extremity muscle architecture
Min Kyu Kim, Young Jun Ko, Hwang Jae Lee, Hyun Geun Ha, Wan Hee Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 1호 7 38-43 (6 pages)
Objective: To investigate and compare the size of the rectus femoris (RF), tibialis anterior (TA), and medial gastrocnemius (GMM) using ultrasound (US) imaging in young, elderly, and very elderly groups. Design: Cross sectional study. Methods: This study consisted of 25 young (age 20 years), 24 elderly (age 65-74 years), and 25 very elderly (age 75-90 years) people with no physical dysfunctions. The cross sectional area (CSAs) of the RF and muscle thickness of the TA and GMM were measured at... -
Effect of low intensity pulsed ultrasound in activating the mitogen-activated protein kinase signaling pathway and inhibition inflammation cytokine synthesis in chondrocytes
Eun-Jung Kim, Gye-Yeop Kim 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 1호 6 33-37 (5 pages)
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Wheelchair martial arts practitioners have similar bone strength, sitting balance and self-esteem to healthy individuals
Shirley S. M. Fong, Shamay S. M. Ng, Anthony O. T. Li, X. Guo 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 1호 5 27-32 (6 pages)
Objective: The aim of this study was to compare the radial bone strength, sitting balance ability and global self-esteem of wheelchair martial arts practitioners and healthy control participants. Design: Cross-sectional study. Methods: Nine wheelchair martial art practitioners with physical disabilities and 28 able-bodied healthy individuals participated in the study. The bone strength of the distal radius was assessed using the Sunlight Mini-Omni Ultrasound Bone Sonometer; sitting balance was... -
The effect of whole body vibration training on postural sway in patients with spinal cord injury
Yasuyoshi Asakawa, Myung-Mo Lee, Chang-Ho Song 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2013, 제 2권 제 2호 2 70-74 (5 pages)
Objective: The aim of this study was to determine the impact of the application of whole body vibration training (WBV) on the balance ability of patients with an American Spinal Injury Association (ASIA) type C or D spinal cord injury. Design: Randomized controlled trial. Methods: Twelve patients with spinal cord injury were enrolled in this study. The participants were randomized to an experimental group (n=6) or control group (n=6). The subjects in the experimental group received WBV exercise... -
T-cell responses in porcine peripheral blood mononuclear cells infected with North American porcine reproductive and respiratory syndrome virus
Ji Young Park, Kyoung Ki Lee, Byeong Jae So, Yeon Hee Kim, Bo youn Moon, Seong Hee Kim 대한수의학회 대한수의학회 학술대회발표집 2 Pages
대한수의학회 대한수의학회 학술대회발표집 추계학술심포지움 172 284-285 (2 pages)
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Changes in hoof kinetics and kinematics at walk in response to hoof trimming
Babak Faramarzi, An Nguyen, Fanglong Dong 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 4호 12 557-562 (6 pages)
Appropriate hoof preparation and symmetry are linked to the well-being of the horse. Previous studies have shown the efficacy of pressure plates (PPs) in delivering objective biomechanical analysis. We aimed to assess the effect of hoof trimming on hoof biomechanics using a PP. Nine clinically sound Arabian horses were walked across a PP while foot strike was recorded by a digital camera. Kinetic and kinematic parameters were recorded before and after trimming. Changes were considered... -
Novel vertebral computed tomography indices in normal and spinal disorder dogs
Jongsu Lim, Youngmin Yoon, Taesung Hwang, Hee Chun Lee 대한수의학회 Journal of Veterinary Science 5 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 2호 16 296-300 (5 pages)
This study was carried out to derive and evaluate reference computed tomography (CT)-based indices for normal canine spine. CT and magnetic resonance images were acquired from 12 clinically normal Beagle dogs (normal group) and 50 dogs with 56 spinal disorders (patient group). Image acquisition regions were cervical spine (C2-T1), thoracic spine (T1-T13), and lumbar spine (L1-L7). Measured indices were: the ratios of width to height of the spinal cord including the dura matter (CR) and of the... -
Effect of serum-derived albumin scaffold and canine adipose tissue-derived mesenchymal stem cells on osteogenesis in canine segmental bone defect model
Daeyoung Yoon, Byung-Jae Kang, Yongsun Kim, Seung Hoon Lee, Daeun Rhew, Wan Hee Kim, Oh-Kyeong Kweon 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 4호 2 397-404 (8 pages)
Composite biological and synthetic grafts with progenitor cells offer an alternative approach to auto- or allografts for fracture repair. This study was conducted to evaluate osteogenesis of autologous serum-derived albumin (ASA) scaffolds seeded with canine adipose tissue-derived mesenchymal stem cells (Ad-MSCs) in a canine segmental bone defect model. ASA scaffold was prepared with canine serum using cross-linking and freeze-drying procedures. Beta-tricalcium phosphate (β-TCP) was mixed at... -
Improved rat spinal cord injury model using spinal cord compression by percutaneous method
Wook-Hun Chung, Jae-Hoon Lee, Dai-Jung Chung, Wo-Jong Yang, A-Jin Lee, Chi-Bong Choi, Hwa-Seok Chang, Dae-Hyun Kim, Hyo Jin Chun 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 3호 13 329-335 (7 pages)
Here, percutaneous spinal cord injury (SCI) methods using a balloon catheter in adult rats are described. A balloon catheter was inserted into the epidural space through the lumbosacral junction and then inflated between T9-T10 for 10min under fluoroscopic guidance. Animals were divided into three groups with respect to inflation volume: 20 μL (n = 18), 50 μL (n = 18) and control (Fogarty catheter inserted but not inflated; n = 10). Neurological assessments were then made based on BBB score,... -
Biceps femoris muscle transposition for treatment of cranial cruciate ligament rupture in small breed dogs
Roberto Tamburro*, Stefania Pinna, Anna Maria Tribuiani, Alessandra Panacea, Fabio Carli, Antonio Venturini 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 1호 13 93-98 (6 pages)
The purpose of this study was to evaluate a new extracapsular surgical technique for the treatment of cranial cruciate ligament rupture in small breed dogs. Nine small breed dogs (seven females and two males) weighing ≤ 15 kg were treated with biceps femoris muscle transposition (BFT). The duration of the BFT procedure was 20 min. Each patient underwent a standard clinical protocol and a questionnaire for the owners. Follow-up (at 1, 3, and 12 months postoperative) confirmed significant... -
Implantation of canine umbilical cord blood-derived mesenchymal stem cells mixed with beta-tricalcium phosphate enhances osteogenesis in bone defect model dogs
Byung-Jun Jang, Ye-Eun Byeon, Ji-Hey Lim, Hak-Hyun Ryu, Wan Hee Kim, Yoshihisa Koyama, Masanori Kikuchi, Kyung-Sun Kang*, Oh-Kye 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 4호 8 387-394 (8 pages)
in group CM. Histologically, bone formation was observed around b-TCP in longitudinal sections of implant in both groups. Histomorphometric analysis revealed significantly increased new bone formation in group CM at 12 weeks after implantation (p ＜ 0.05). When applied to the non-union fracture, fracture healing was identified by 6 weeks after injection of UCB-MSCs. The present study indicates that a mixture of UCB-MSCs and b-TCP is a promising osteogenic material for repairing bone defects. -
The Safety and efficacy of a new self-expandable intratracheal nitinol stent for the tracheal collapse in dogs
Joon-young Kim, Hyun-jung Han, Hun-young Yun, Bora Lee, Ha-young Jang, Ki-dong Eom, Hee-myung Park, Soon-wuk Jeong* 대한수의학회 Journal of Veterinary Science 3 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 1호 12 91-93 (3 pages)
To evaluate the potential utility of a self-expandable intratracheal nitinol stent with flared ends for the treatment of tracheal collapse in dogs, endotracheal stenting therapy was performed under fluoroscopic guidance in four dogs with severe tracheal collapse. During the 4 to 7 month followup, after stent implantation, clinical signs, including dyspnea and respiratory distress, dramatically improved in all dogs. The radiographs showed that the implanted stents improved the tracheal collapse,... -
기계적 및 열적 피로가 교정용 접착제의 결합강도에 미치는 영향
신완철(Wan-Cheal Shin), 김종성(Jong-Sung Kim), 김정기(Jong-Ghee Kim) 대한치과교정학회 The Korean Journal of Orthodontics 12 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 2호 5 175-186 (12 pages)
본 연구의 목적은 기계적 및 열적피로가 전단결합강도에 미치는 영향을 알아 보기 위한 것이다. 3종의 비반죽형 접착제(Ortho-one, MonoLok², System 1+)로 mesh형의 금속 브라켓(Ormesh)을 교정목적으로 발거된 소구치의 법랑질면을 평탄하게 한 후 부착하고 100만회의 반복비틀림과 1,000회의 thermocycling을 가하였다. 그 후 Instron을 이용하여 전단결합강도를 측정하여 다음과 같은 결과를 얻었다. 1. 접착제의 Knoop 경도치는 thermocycling전에는 Monolok²가 64.03kg/mm²으로 가장 크고, System 1+가... -
Neural circuit remodeling and structural plasticity in the cortex during chronic pain
WoojinKim, SunKwangKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.1 1 1-8 (8 pages)
Damage in the periphery or spinal cord induces maladaptive plastic changes along the somatosensory nervous system from the periphery to the cortex, often leading to chronic pain. Although the role of neural circuit remodeling and structural synaptic plasticity in the ‘pain matrix’ cortices in chronic pain has been thought as a secondary epiphenomenon to altered nociceptive signaling in the spinal cord, progress in whole brain imaging studies on human patients and animal models has suggested a... -
Hyperosmotic Stimulus Down-regulates 1α, 25-dihydroxyvitamin D3- induced Osteoclastogenesis by Suppressing the RANKL Expression in a Co-culture System
YuShunTian, HyunJooJeong, Sang-DoLee, SeokHeuiKong, Seung-HoOhk, Yun-JungYoo, Jeong-TaegSeo, DongMinShin, Byung-WhaSohn, Syng-IllLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.3 9 169-176 (8 pages)
The hyperosmotic stimulus is regarded as a mechanical factor for bone remodeling. However, whether the hyperosmotic stimulus affects 1Ձ, 25-dihydroxyvitamin D3 (1Ձ,25(OH)2D3)-induced osteoclastogenesis is not clear. In the present study, the effect of the hyperosmotic stimulus on 1Ձ,25(OH)2D3- induced osteoclastogenesis was investigated in an osteoblast-preosteoclast co-culture system. Serial doses of sucrose were applied as a mechanical force. These hyperosmotic stimuli... -
産業炎害患者의 精神醫學的 問題
대한신경정신의학회 신경정신의학 1982, 제 21권 제 3호 30 531-543 (13 pages)
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Zirconia abutment의 활용 Part I
이종혁 대한치과이식임플란트학회 Journal of Dental Implant Research 7 Pages
대한치과이식임플란트학회 Journal of Dental Implant Research 2007, 제 26권 1호 1 1-7 (7 pages)
완성도 높은 보철물을 위해서는 기능성과 생물학적 요건 그리고 심미성을 만족 시켜야 한다. 최근들어 심 미적인 면에 대한 관심이 증가하면 치과 치료 전반에 걸쳐 심미성을 강조하는 술식과 재료들이 많이 보급 되고 있다. 보철분야의 심미 수복재료는 도재와 복합 레진 수복물이 주로 사용되고 있는데 금속 도재는 장 기간의 안정된 예후를 보이나 하부의 금속 구조물로 인해 심미성에 한계가 있으며 복합레진의 경우 변색 이나 마모 등의 한계가 있다. -
탄소성유강화플라스틱으로 만들어진 소형 인장 시험편에서 여러 종류의 심재에 따른 파손 연구
김재원(Jae-Won Kim), 조재웅(Jae-Ung Cho) 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 8 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2018, 제 8권 제 3호 55 589-596 (8 pages)
현대 사회에서 의식주 중에서 구조물이나 운송수단은 중요한 역할을 가진다. 만약 구조물이나 운송수단에 작은 크랙이라도 생기고 크랙이 진전되면 그 부품들이 파괴되어 큰 사고를 야기할 수 있다. 이러한 상황을 방지하기 위한 본 연구에서는 크랙의 진전에 따른 파손 경향을 조사하 기 위하여 시험편을 이용하였다. CT 시험편의 재질로는 요즘 각광받는 복합재료인 단방향 탄소 섬유 강화플라스틱을 사용하였다. 시험편 모델은 단방향성 섬유로서 적층각도를 주었고 적층각 도는 [60/-60/60/-60]순으로 지정하였다. 해석 조건으로는... -
굴삭기 버켓의 구조적 안정성을 위한 피로 시뮬레이션 해석에 의한 내구성 연구
이정호, 조재웅 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 10 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2016, 제 6권 제 6호 43 459-468 (10 pages)
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전륜 제동시스템의 피로해석에 의한 내구성 연구
이정호, 조재웅 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 8 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2016, 제 6권 제 2호 42 413-420 (8 pages)
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The Relationship Between Addiction to Computers and Smartphones and Carpal Tunnel Syndrome in Average People
Lee Jun-Cheol 한국보건기초의학회 한국보건기초의학회지 7 Pages
한국보건기초의학회 한국보건기초의학회지 2017, Vol.10 No.2 5 60-66 (7 pages)
The objective of this study was to investigate the relationship between computer and smartphone addiction and carpal tunnel syndrome (CTS) in average people. A total of 378 subjects, 126 males and 252 females, were tested on a computer and smartphone addiction scale, a Symptom Severity Scale (SSS), and a Function Status Scale (FSS) for CTS. 49 (12.9%) of the subjects used a computer and 329 (87.1%) were smartphone users. This study showed that among the computer users 23 (46.9%) subjects... -
Creativity, Leadership, and a Challenge for East Asian Education
Roger C. Shouse 한국교육행정학회 교육행정학연구 12 Pages
한국교육행정학회 교육행정학연구 2012, 제 30권 제 2호 11 253-264 (12 pages)
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월경 전 여성 청소년들의 골밀도 특성
김도연, 윤병곤 한국웰니스학회 한국웰니스학회지 13 Pages
한국웰니스학회 한국웰니스학회지 2012, 제 7권 1호 23 243-255 (13 pages)
골밀도 특성에 관한 연구는 문헌에 많이 발표 되어 있으며, 이러한 특성에 영향을 미치는 여러가지 다양한 요인들에 대한 내용도 다방면의 연구를 통해 알려졌다. 유전과 잘못된 식습관, 칼슘과 마그네슘의 보충상태, 천식치료를 위한 albuterol의 복용 등은 골밀도의 매개 변수에 많은 영향을 미친다. 또한 골의 크기는 무게에 대한 골의 저항이 골의 지름의 크기에 관련이 크기 때문에 골의 저항력에 매우 중요한 영향을 미친다. 특히, 폐경은 골밀도의 빠른 감소를 가져오는 결과가 되는 순환 에스트로겐의 수준이 낮아지는 원인이... -
어깨 불안정성에 대한 고찰
김종선, 박진국, 장석암 한국웰니스학회 한국웰니스학회지 9 Pages
한국웰니스학회 한국웰니스학회지 2007, 제 2권 2호 5 31-39 (9 pages)
견관절부(shoulder joint)는 우리몸에서 관절운동 이 가장 큰 부분이며, 이러한 큰 관절 움직임 때문 에 넓은 범위에서 팔(arm)을 자연스럽게 사용할 수 있다(전재명, 1996). 이렇게 큰 관절 움직임 때문에 스포츠 경기시 팔의 움직임이 많아지게 되며, 이러 한 팔의 움직임이 경기 승패를 좌우 할 수 있기 때문에 선수들은 통증을 참고 무리한 동작을 하여 손상을 입는 경우가 많다(Quillen et al., 2004). -
EMI shielding effectiveness and mechanical properties of MWCNTs-reinforced biodegradable epoxy matrix composites
Yoon-Ji Yim, Dong Chul Chung, Soo-Jin Park 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 4 36-41 (6 pages)
Biodegradable epoxy (B-epoxy) was prepared from diglycidyl ether of bisphenol A and epoxidized linseed oil. The mechanical properties of B-epoxy composites reinforced with multi-walled carbon nanotubes (MWCNTs/B-epoxy) were examined by employing dynamic mechanical analysis, critical stress intensity factor (KIC) tests, and impact strength tests. The electromagnetic interference shielding effectiveness (EMI-SE) of the composites was evaluated using reflection and absorption methods. Mechanical... -
Effects of maleic anhydride content on mechanical properties of carbon fibers-reinforced maleic anhydride-grafted-polypropylene matrix composites
Hyun-Il Kim, Woong Han, Woong-Ki Choi, Soo-Jin Park, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 6 39-46 (8 pages)
In this work, the effects of maleic anhydride (MA) content on mechanical properties of chopped carbon fibers (CFs)-reinforced MA-grafted-polypropylene (MAPP) matrix composites. A direct oxyfluorination on CF surfaces was applied to increase the interfacial strength between the CFs and MAPP matrix. The mechanical properties of the CFs/MAPP composites are likely to be different in terms of MA content. Surface characteristics were observed by scanning electron microscope, Fourier transform infrared... -
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)
In this work, we studied the effects of electrochemical oxidation treatments of carbon fibers (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... -
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)
well as the dynamic mechanical properties of carbon/BMI composites, are discussed. Reports on the thermal expansion behavior of intercalated graphite flake, and the effects of exfoliated graphite nanoplatelets (xGnP) on the properties of PETI-5 matrix composites are also reviewed. The dynamic mechanical and thermal properties and the electrical resistivity of xGnP/PETI-5 composites are characterized. The effect of liquid rubber amine-terminated poly(butadiene-co-acrylonitrile) (ATBN)-coated xGnP... -
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... -
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... -
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...
