scholarly journals Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

2017 ◽  
Vol 21 ◽  
pp. 51-60 ◽  
Author(s):  
Jung Dam Kim ◽  
Jae-Seung Roh ◽  
Myung-Soo Kim
Keyword(s):  
Carbon Fiber ◽  
Crystalline Structure ◽  
Carbonization Temperature ◽  
Structure And Properties ◽  
Isotropic Pitch

Crystalline Structure and Properties of Carbon Nanofiber Composites Prepared by Melt Extrusion

2007 ◽  
Vol 208 (17) ◽  
pp. 1928-1936 ◽  
Author(s):  
Gang Sui ◽  
Wei-Hong Zhong ◽  
Mike A. Fuqua ◽  
Chad A. Ulven
Keyword(s):  
Crystalline Structure ◽  
Carbon Nanofiber ◽  
Structure And Properties ◽  
Melt Extrusion

The effect of mechanical stress on Ni63.8Mn11.1Ga25.1 microwire crystalline structure and properties

2013 ◽  
Vol 43 ◽  
pp. 60-64 ◽  
Author(s):  
A.S. Aronin ◽  
G.E. Abrosimova ◽  
A.P. Kiselev ◽  
V. Zhukova ◽  
R. Varga ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Crystalline Structure ◽  
Structure And Properties

scholarly journals Carbon Fiber Production from Electrospun Sulfur Free Softwood Lignin Precursors

2017 ◽  
Vol 12 (4) ◽  
pp. 155892501701200 ◽  
Author(s):  
Samira Aslanzadeh ◽  
Behzad Ahvazi ◽  
Yaman Boluk ◽  
Cagri Ayranci
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Structural Characteristics ◽  
Morphological Characteristics ◽  
Carbonization Temperature ◽  
Purification Process ◽  
Fiber Morphology ◽  
Heating Rates ◽  
Fiber Production

In this study, a sulfur-free softwood lignin (SFSL) was electrospun to form bead-free fibers. The fibers were evaluated as potential precursors for carbon fiber production. Higher heating rates of thermostabilization caused afused fiber morphology. The lignin purification process also affected the quality of the SFSL-based carbon fibers. Therefore, the yield, morphological characteristics, structural characteristics, electrical conductivity and mechanical properties of the carbon fibers were evaluated. At higher carbonization temperatures crystalline carbon fibers were formed. As a result, as the carbonization temperature increased, the conductivity of SFSL-based carbon fibers also increased.

Effects of oxygen-to-argon ratio on crystalline structure and properties of Y2O3 anti-reflection films for freestanding CVD diamond

2017 ◽  
Vol 693 ◽  
pp. 468-473 ◽  
Author(s):  
Chenyi Hua ◽  
Liangxian Chen ◽  
Chengming Li ◽  
Meng Wang ◽  
Jianchao Guo ◽  
...  
Keyword(s):  
Crystalline Structure ◽  
Cvd Diamond ◽  
Structure And Properties

scholarly journals Improving Spinnability of Hyper-Coal Derived Spinnable Pitch through the Hydrogenation with 1,2,3,4-Tetrahydroquinoline

2018 ◽  
Vol 4 (3) ◽  
pp. 46
Author(s):  
Jianxiao Yang ◽  
Wei Wu ◽  
Xiaxiang Zhang ◽  
Kui Shi ◽  
Xuanke Li ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Tensile Strength ◽  
Carbon Fiber ◽  
Oxygen Content ◽  
Softening Point ◽  
Carbonization Temperature

The proper hydrogenation of Hyper-coal (HPC) using 1,2,3,4-tetrahydroquinoline (THQ) was able to decrease the oxygen content and adjust the molecular structure of HPC for preparing the spinnable pitch with high softening point (SP). The spinnable pitch prepared from the THQ-soluble (QS) fraction of HPC as a precursor consisted of more naphthenic carbon groups than that prepared from the 1-methylnaphthalene (1-MN) soluble (MNS) fraction of HPC. The HPC-QS derived spinnable pitch showed excellent spinning performance even though the SP of 260 °C, and the tensile strength of the resultant carbon fiber was increased to 1350 MPa with a diameter around 8 µm under the only carbonization temperature of at 800 °C for 5 min.

The Preparation of PAN Composite TiO2 Nano-ACF and the Conditions Study

2012 ◽  
Vol 586 ◽  
pp. 58-63 ◽  
Author(s):  
Yan Bo Wu ◽  
Ying Chun Yan ◽  
Ting Lou ◽  
Tie Ben Song
Keyword(s):  
Carbon Fiber ◽  
Decisive Role ◽  
Solution Concentration ◽  
Oxidation Time ◽  
Oxidation Temperature ◽  
Structure And Properties ◽  
Optimal Conditions ◽  
Characteristic Peak ◽  
Electrostatic Spinning ◽  
Easy Operation

With its simple, easy operation, electrostatic spinning has become the most important and effective way on the preparation of nano-fibers. Through experiments, we identified the optimal conditions for the preparation of PAN nano-fibers composite TiO2 are: the spinning solution concentration is 12%, the angle is 5~8°, the spinning distance is 8cm, and the voltage is 12kV. The pre-oxidation largely determine the structure and properties of carbon fiber in the preparation of carbon nano-fibers. The temperature plays a decisive role on pre-oxidation. Through SEM、TG-DTA and FTIR, we explore the best conditions for the pre-oxidation temperature is 280°C and the pre-oxidation time is 2h. After carbonization and activation, the characteristic peak of TiO2 appeared at 2θ=25.2°, 37.7°in the patterns of XRD.

Structure and properties of UHMWPE fiber/carbon fiber hybrid composites

2006 ◽  
Vol 101 (3) ◽  
pp. 1880-1884 ◽  
Author(s):  
Sheng-Hua Lu ◽  
Guo-Zheng Liang ◽  
Zhi-Wei Zhou ◽  
Fang Li
Keyword(s):  
Carbon Fiber ◽  
Hybrid Composites ◽  
Structure And Properties ◽  
Uhmwpe Fiber

Influence of Modified Carbon Fiber on Properties of Paper Based Friction Materials

2017 ◽  
Vol 909 ◽  
pp. 207-212 ◽  
Author(s):  
Kun Peng Li ◽  
Chuan Shan Zhao ◽  
Chao Jun Wu ◽  
Yi Fei Jiang ◽  
Wen Jia Han
Keyword(s):  
Electron Microscopy ◽  
Carbon Fiber ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Structure And Properties ◽  
Meldrum's Acid ◽  
Meldrum’S Acid ◽  
Friction Materials ◽  
Silane Coupling ◽  
Infrared Spectral

The paper adopts modified carbon fiber with Meldrum's acid and silane coupling agent (KH-550), then add the modified carbon fiber to the paper based friction materials. The paper aims to explore the changes of modified carbon fiber in its surface structure and properties by electron microscopy and infrared spectral analysis, and the effect of anionic microparticle forming retention aid system comprised of lithium soapstone-cationic polyacrylamide (CPAM) on mechanical properties and retention of paper based friction materials. Compared with the addition of unmodified carbon fiber to paper based friction materials, the addition of modified carbon fiber with Meldrum's acid, silane coupling agent, Meldrum's acid and silane coupling agent enhance the tensile strength of paper based friction materials. The tensile index of paper based friction materials was separately enhanced by 64.87 %, 91.38 % and 28.88 %. Compared with the paper based friction materials without the anionic microparticle forming retention aid system, the basis weight of paper based friction materials increased by 13.97 %.

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