China
Africa
Explore chapters and articles related to this topic
The Bending Behavior of Carbon Fiber Reinforced Polymer Composite for Car Roof Panel Using ANSYS 21
Published in Amar Patnaik, Vikas Kukshal, Pankaj Agarwal, Ankush Sharma, Mahavir Choudhary, Soft Computing in Materials Development and its Sustainability in the Manufacturing Sector, 2023
The materials taken for investigation consisted of carbon fiber as a reinforcement and PVC foam, resin polyester and resin epoxy as matrices for simulation of required composite. The combination of carbon fiber and resin epoxy shows high damping property and can be used to minimize the vibration. Carbon fiber offers more strength to the composite.
Electrospun Carbon Nanofibers for Energy Conversion and Storage
Published in Changjian Zhou, Min Zhang, Cary Y. Yang, Nanocarbon Electronics, 2020
As environmental pollution has become a serious problem, developing energy conversion and storage devices to support the utilization of renewable energy technologies is increasingly important. Lithium-ion batteries (LIBs) and solar cells (SCs) are representative examples. Better LIBs with high energy density, high power density, long cycle life, and improved safety are in high demands. Electrode materials are the key to define the LIB performance. Carbon materials have been a key component in today’s LIBs due to their chemical stability, excellent electrical conductivities, and large surface areas. Among them, carbon nanofibers (CNFs) have attracted particular attentions. Initially, carbon fibers were developed as one of the important industrial materials using various carbon precursors, including polyacrylonitrile (PAN) through a melt spinning process. PAN was later commonly used as a polymeric precursor in electrospinning processes, which can be converted into CNFs through oxidation stabilization and carbonization processes.
Hydrogen and Solid Carbon Products from Natural Gas
Published in Jianli Hu, Dushyant Shekhawat, Direct Natural Gas Conversion to Value-Added Chemicals, 2020
Robert Dagle, Vannesa Dagle, Mark Bearden, J. Holladay, Theodore Krause, Shabbir Ahmed
Carbon fibers have a number of favorable mechanical and chemical properties, such as high tensile strength and stiffness, low density, dimensional stability, low coefficient of thermal expansion, fatigue resistance, and chemical inertness and biological compatibility (Park and Lee 2015). Carbon fibers are finding increasing use in a variety of applications such as aerospace, automobiles, sports equipment, the chemical industry, wind turbines, carbon-reinforced composite materials, textiles, etc. (Holmes 2014; Park and Lee 2015; Mazumdar 2016; Witten et al. 2016). The physical properties (primarily tensile strength and modulus, etc.) determine the proper use of carbon fibers (Milbrandt and Booth 2016).
Assessment of a unique reinforcement construction on mechanical behaviour of composite structures
Published in The Journal of The Textile Institute, 2023
As shown in Figure 5, among all the composite plates, C2 has the highest bending strength, with 789.693 MPa for the weft direction and 854.420 MPa for the warp direction. Regarding reinforcement fabric construction, twill reinforcement is expected to display the highest strength as reported by Houshyar et al. (2005) since this construction has lower interlace point, longer float length and also lower crimp ratio than that of plain construction, meaning that fewer air gap is entrapped in yarn interlacement points during composite manufacturing and thus providing higher strength. C4 plate reinforced by two layers of interlock knitted fabric exhibits the lowest strength with 179.897 MPa and 227.249 MPa in the course and wale direction, respectively similar to findings of Wu et al. (1993), Leong et al., 2000, and Padaki et al. (2006) about knitted composites. This phenomenon could have various potential reasons. One reason is that woven fabrics are constructed by a significant number of parallelly oriented yarn, while knitted fabrics are constructed by manipulating a single yarn. Another is that the highly curved configuration of yarn in knitted fabrics could lead to the void formation in loop linkage regions due to loop interlocking. Another factor is massive fibre failure resulting from loop formation mechanism in the course of brittle fibre utilization (Padaki et al., 2006). Meaningly, it is a challenge to manipulate and handle carbon fibre because it has inherent brittle characteristics.
Preparation of biocarbon micro coils
Published in Soft Materials, 2021
Kyoka Komaba, Shota Hirokawa, Hiromasa Goto
Carbon fibers are one of the most promising organic materials in the industry because of their high quality and performance.[21] They are light weight, stable, and strong, while they exhibit electrical conductivity. Therefore, they have been used as construction materials for jet airplane bodies, solar cells, and transistors.[10] Carbon fibers can be obtained from polyacrylonitrile (PAN), which is synthesized by radical polymerization in water medium using acrylonitrile as the monomer, affording the polymer in high yield.[8,21–24] The carbon fibers can be then prepared by the carbonization of PAN treated with heat under inert atmosphere. All elements except carbon and nitrogen (partly exist) are eliminated in the high-temperature carbonization process, thus resulting in carbon fibers.[23,24]
Effect of drying method on the microstructures and mechanical strength of polyacrylonitrile nascent fibers
Published in Drying Technology, 2020
Quan Gao, Min Jing, Meiling Chen, Shengyao Zhao, Jianjie Qin, Chengguo Wang
Most of commercial carbon fibers are manufactured by the polyacrylonitrile (PAN) precursor fibers.[1–3] The mechanical strength of carbon fiber is mainly depended on the quality of the precursor fibers, which is determined by their structures.[4–6] In the industrial, PAN precursors are mainly prepared by the wet spinning and dry-jet wet spinning method.[7–9] In both of spinning process, the coagulation process is an initial and vital stage for the structure formation and transformation of the PAN precursor fibers.[10–12] Consequently, it is necessary to investigate the microstructures of nascent fibers (obtained after coagulation process). The fresh nascent fibers are usually wet, which are comprised of not only fiber skeleton but also solvents (such as dimethyl sulfoxide (DMSO), dimethyl formamide (DMF), dimethyl acetamide (DMAc) or salt) and coagulator (water).[8,13] In order to investigate the microstructural formation and transformation of nascent fibers, the first and foremost processing step is drying/de-solution (solvents and water) to obtain drying samples for structural characterization.