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Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber
Jung Dam Kim, Jae-Seung Roh, Myung-Soo Kim 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 6 51-60 (10 pages)
function of the carbonization temperature. The in-plane crystallite size (La) of the carbonized pitch fiber from X-ray diffraction increased monotonously by increasing the carbonization temperature resulting in a gradual increase in the electrical conductivity from 169 to 3800 S/cm. However, the variation in the d002 spacing and stacking height of the crystallite (Lc) showed that the structural order perpendicular to the graphene planes got worse in carbonization temperatures from 800 to 1200oC... -
Effect of acid catalysts on carbonization temperatures for ordered mesoporous carbon materials
Jeong Kuk Shon, Xing Jin, Yun Seok Choi, Jong Gu Won, Yoon Kyung Hwang, Dae Jong You, Chengbin Li, Ji Man Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 10 66-71 (6 pages)
polymerize the carbon precursors before the carbonization, an aging process should also be carried out in the presence of acid catalysts in low temperature ranges of 100°C?200°C. In the case of sucrose as a carbon source, sulfuric acid (H2SO4) is typically used as an acid catalyst for the dehydration and subsequent oligomerization of the carbon precursor. This is very important for preventing the infiltrated carbon precursors from draining outside the mesopores of the silica templates before... -
Yield enhancement of matrix precursor in short carbon fiber reinforced randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija, Sharad Chandra Sharma, Anil Verma 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 7 57-65 (9 pages)
system was studied. The fourier transform infrared spectrometry (FTIR), thermogravimetric analysis (TGA), yield, yield rate, and yield impact were used to check the effect of stabilization and pressure on the yield of the matrix precursor and the end properties of the composite thereafter. The results showed that the yield increased with stabilization duration up to 20 h whereas it decreased for stabilization duration beyond 20 h. Further results showed that the stabilized matrix precursor for a... -
Effects of carbonization temperature on pore development in polyacrylonitrile-based activated carbon nanofibers
Hye-Min Lee, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 13 146-150 (5 pages)
In this work, activated carbon nanofiber (ACNF) electrodes with high double-layer capacitance and good rate capability were prepared from polyacrylonitrile nanofibers by optimizing the carbonization temperature prior to H2O activation. The morphology of the ACNFs was observed by scanning electron microscopy. The elemental composition was determined by analysis of X-ray photoelectron spectroscopy. N2-adsorption-isotherm characteristics at 77 K were confirmed by Brunauer-Emmett-Teller and... -
열중량분석법을 이용한 하수슬러지 탄화물의 연소특성 평가
박소미, 임혁, 김철규 한국열환경공학회 한국열환경공학회 학술대회지 10 Pages
한국열환경공학회 한국열환경공학회 학술대회지 2015년 추계 3 16-25 (10 pages)
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석탄과 EFB 반탄화물의 혼합 연소에 따른 발생가스 특성
최병수, 구재회, 임용택, 오세천 한국열환경공학회 열환경공학 9 Pages
한국열환경공학회 열환경공학 2016, 제 13권 1호 8 53-61 (9 pages)
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열중량분석법을 이용한 하수슬러지 탄화물의 연소 특성 평가
박소미, 임혁, 김철규 한국열환경공학회 열환경공학 9 Pages
한국열환경공학회 열환경공학 2015, 제 12권 2호 9 74-82 (9 pages)
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볏짚 이용 Bio-SRF 활용을 위한 Torrefaction 반응 특성 연구
남성방, 임용택, 구재회, 남상익, 김윤명, 오세천, Jeeban Poudel 한국열환경공학회 열환경공학 8 Pages
한국열환경공학회 열환경공학 2015, 제 12권 2호 4 25-32 (8 pages)
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종이가 주성분인 RDF(Refuse Derived Fuel)의 탄화특성
최연석, 김부웅 한국열환경공학회 열환경공학 6 Pages
한국열환경공학회 열환경공학 2005, 제 2권 2호 4 107-112 (6 pages)
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바이오메스 열처리 및 수열합성에 의한 복합기공소재 제조
서정권, 이정민 한국열환경공학회 열환경공학 16 Pages
한국열환경공학회 열환경공학 2006, 제 3권 1호 5 39-54 (16 pages)
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Pitch 열개질에 의한 탄소계 전극소재 합성
서정권, 홍지숙, 이정민, 이범재 한국열환경공학회 열환경공학 15 Pages
한국열환경공학회 열환경공학 2006, 제 3권 2호 1 93-108 (15 pages)
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Pitch 열개질에 의한 탄소계 전극소재 합성
서정권, 홍지숙, 이정민, 이범재 한국열환경공학회 열환경공학 15 Pages
한국열환경공학회 열환경공학 2009, 제 6권 1호 5 41-55 (15 pages)
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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)
high specific modulus that have attracted much interest in the aerospace industry, but their high manufacturing cost and low yield are still problems that prevent their wide applications in practice. This paper presents a laser-based process for graphitization of carbon fiber (CF) and explores the effect of laser radiation on the microstructure of CF. The obtained Raman spectra indicate that the outer surface of CF evolves from turbostratic structures into a three-dimensional ordered state after... -
Physicochemical properties and methane adsorption performance of activated carbon nanofibers with different types of metal oxides
Faten Ermala Che Othman, Norhaniza Yusof, Hasrinah Hasbullah, Juhana Jaafar, Ahmad Fauzi Ismail, Noor Shawal Nasri 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 11 82-89 (8 pages)
In this study, composite PAN-based ACNFs embedded with MgO and MnO2 were prepared by the electrospinning method. The resultant pristine ACNFs, ACNF/MgO and ACNF/MnO2 were characterized in terms of their morphological changes, SSA, crystallinity and functional group with FESEM-EDX, the BET method, XRD and FTIR analysis, respectively. Results from this study showed that the SSA of the ACNF/MgO composite (1893 m2 g?1) is significantly higher than that of the pristine ACNFs and ACNF/MnO2 which is... -
Relationships between dielectric properties and characteristics of impregnated and activated samples of potassium carbonate- and sodium hydroxide-modified palm kernel shell for microwave-assisted activation
Norulaina Alias, Muhammad Abbas Ahmad Zaini, Mohd Johari Kamaruddin 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 9 62-72 (11 pages)
The aim of this work was to evaluate the dielectric properties of impregnated and activated palm kernel shells (PKSs) samples using two activating agents, potassium carbonate (K2CO3) and sodium hydroxide (NaOH), at three impregnation ratios. The materials were characterized by moisture content, carbon content, ash content, thermal profile and functional groups. The dielectric properties were examined using an open-ended coaxial probe method at various microwave frequencies (1?6 GHz) and...
