Dimensional changes of carbon fiber fabrics reinforced phenolic resin-based carbon/carbon composites during pyrolysis

Tzeng, Shinn-Shyong; Yang, Tsung-Chieh

doi:10.1163/1568554053971614

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…[4][5][6] Particles of these metal catalysts are embedded in the middle or at the end of fibers, and it is possible to adjust the diameter of the CNFs depending on the size of the particles of the metal catalysts. In addition, selective control is possible with respect to the characteristics of carbon nanofibers if conditions, such as decomposition temperature, catalyst preparation, or reaction gas, [1][2][3][11][12][13][14][15][16][17][18][19] are regulated. Therefore, strict control of these variables is required during synthesis of CNFs.…”

Section: -8mentioning

confidence: 99%

Synthesis and Characterization of Carbon nanofibers on Co and Cu Catalysts by Chemical Vapor Deposition

Park

Kim²,

Lee

2014

Bulletin of the Korean Chemical Society

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This study reports on the synthesis of carbon nanofibers via chemical vapor deposition using Co and Cu as catalysts. In order to investigate the suitability of their catalytic activity for the growth of nanofibers, we prepared catalysts for the synthesis of carbon nanofibers with Cobalt nitrate and Copper nitrate, and found the optimum concentration of each respective catalyst. Then we made them react with Aluminum nitrate and Ammonium Molybdate to form precipitates. The precipitates were dried at a temperature of 110 °C in order to be prepared into catalyst powder. The catalyst was sparsely and thinly spread on a quartz tube boat to grow carbon nanofibers via thermal chemical vapor deposition. The characteristics of the synthesized carbon nanofibers were analyzed through SEM, EDS, XRD, Raman, XPS, and TG/DTA, and the specific surface area was measured via BET. Consequently, the characteristics of the synthesized carbon nanofibers were greatly influenced by the concentration ratio of metal catalysts. In particular, uniform carbon nanofibers of 27 nm in diameter grew when the concentration ratio of Co and Cu was 6:4 at 700 °C of calcination temperature; carbon nanofibers synthesized under such conditions showed the best crystallizability, compared to carbon nanofibers synthesized with metal catalysts under different concentration ratios, and revealed 1.26 high amorphicity as well as 292 m 2 g −1 high specific surface area.

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Section: -8mentioning

confidence: 99%

Synthesis and Characterization of Carbon nanofibers on Co and Cu Catalysts by Chemical Vapor Deposition

Park

Kim²,

Lee

2014

Bulletin of the Korean Chemical Society

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“…Hughese et al composed Vapor-Grown Carbon Fiber from mixture of hydrogen and methane in iron crucible in 1890's and reported that the fiber produced by Chemical Vapor Deposition (CVD) had the shape of carbon filament with about 20 µm diameter [9,10]. Afterwards, high performance electron microscope developed and the structure of carbon filament was specifically disclosed when Davise et al first observed it with nano-size diameter in 1950's and then, full-scale studies were begun by Baker et al in early 1970's [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Carbon Nanofibers on Iron and Copper Catalysts by Chemical Vapor Deposition

Hyun

Kim²,

Lee

2013

AMR

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In this study, carbon nanofibers were synthesized on iron and copper catalysts by Chemical Vapor Deposition (CVD). Investigation was made with respect to variation on thickness and surface of fibers based on concentration of iron and copper. In order to prepare metal catalysts of respective synthesis, iron nitrate and copper nitrate were calculated in proportion to weight ratio and then dissolved into distilled water. Obtained catalyst precipitates were filtered and then dried for more than 24 hours at 110°C. Carbon nanofibers were composed by using ethylene gas of carbon source through CVD after pulverization of fully dried catalyst precipitates. Analysis through SEM was made in order to investigate structural characteristics of composed carbon nanofibers, and qualitative and quantitative analyses were conducted on elements through EDS. In addition, crystalline analysis was made on carbon nanofibers through XRD and Raman, and specific surface area measurement was carried on carbon nanofibers composed through BET.

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A Novel Approach to Control Growth, Orientation, and Shape of Human Osteoblasts

Czarnecki

Lafdi

Tsonis

2008

Tissue Engineering Part A

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Carbon-based materials are considered to be promising as implants because of their unique mechanical and biocompatibility properties. This article investigates the use of carbon-based materials as a functional interface for tissue scaffolds and medical implants. Three basic parameters were explored: graphene orientation, crystallinity, and surface interaction. These parameters were measured using optical microscopy, x-ray diffraction, and atomic force microscopy. To explore the effect of the orientation, samples were made with and without a preferred carbon orientation. Conversely, the crystallinity was studied using graphitic and carbonaceous matrices. Finally, the surface interaction study was carried out using oxygen surface functionalized and non-functionalized carbon fibers. Fluorescent, confocal, and environmental scanning microscopy were used to visualize cell response. The cell attachment, proliferation, and elongation were prevalent on the unidirectional carbon preform. Cells tended to orient parallel to the fiber axis (parallel to the 002 graphene plane) and proliferate as a function of higher crystallinity, although the addition of oxygen or other functional groups disrupted the interaction between cells and graphene surface and inhibited the growth. In conclusion, osteoblast (bone-forming cells) attachment and overall growth is a function of crystallite size, graphene orientation, and carbon graphitization.

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Dimensional changes of carbon fiber fabrics reinforced phenolic resin-based carbon/carbon composites during pyrolysis

Cited by 5 publications

References 17 publications

Synthesis and Characterization of Carbon nanofibers on Co and Cu Catalysts by Chemical Vapor Deposition

Synthesis and Characterization of Carbon nanofibers on Co and Cu Catalysts by Chemical Vapor Deposition

Synthesis of Carbon Nanofibers on Iron and Copper Catalysts by Chemical Vapor Deposition

A Novel Approach to Control Growth, Orientation, and Shape of Human Osteoblasts

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