Automated handling of high-temperature thermoplastic Carbon Fiber materials for a large-scale production

Author(s):  
Johannes Graf ◽  
Christoph Richter ◽  
Gunther Reinhart
2010 ◽  
Vol 4 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Göran Gellerstedt ◽  
Elisabeth Sjöholm ◽  
Ida Brodin

In this mini-review, various attempts to make carbon fiber from lignins are discussed. The replacement of construction steel in cars and trucks with a much lighter carbon fiber-based composite will ultimately result in more fuelefficient vehicles. To replace the precursors of carbon fiber, polyacrylonitrile (PAN), or other non-renewable materials such as pitch, by cheap (kraft) lignin, a comprehensive understanding of the physical and chemical characteristics of lignin and the development of methods for its homogeneous large-scale production must be achieved.


2009 ◽  
Vol 34 (9) ◽  
pp. 4216-4226 ◽  
Author(s):  
J.E. O'Brien ◽  
M.G. McKellar ◽  
C.M. Stoots ◽  
J.S. Herring ◽  
G.L. Hawkes

1989 ◽  
Vol 169 ◽  
Author(s):  
Richard L. Gay ◽  
D. Stelman ◽  
J. C. Newcomb ◽  
L. F. Grantham ◽  
G. D. Schnittgrund

AbstractThe Rocketdyne Division of Rockwell International has developed a large scale spray-calcination technique generic to the preparation of ceramic high-temperature superconductor (HTSC) powders. Among the advantages of the technique is that of producing uniformly mixed metal oxides on a fine scale. Production of both yttrium and thallium-based HTSCs has been demonstrated using this technique.In the spray calciner, solutions of the desired composition are atomized as a fine mist into a hot gas. Evaporation and calcination are instantaneous, yielding an extremely fine, uniform oxide powder. The calciner is 76 cm in diameter and can produce metal oxide powder at relatively large rates (approximately 100 g/h) without contamination.Bulk samples of thallium-based powder were prepared by spray calcination, collected, cold-pressed, and sintered. An optimized temperature schedule was developed to produce T12Ba2Ca2Cu3Ox. Samples were examined by X-ray diffraction and characterized by measurements of critical transition temperature, Tc. A complete transition to zero resistance at 112 K was measured.


2017 ◽  
Vol 11 (6) ◽  
pp. 665-675 ◽  
Author(s):  
Christoph Amann ◽  
Sebastian Kreissl ◽  
Hannes Grass ◽  
Josef Meinhardt

2018 ◽  
Vol 140 ◽  
pp. 209-214 ◽  
Author(s):  
Hai Quan Ho ◽  
Yuki Honda ◽  
Shimpei Hamamoto ◽  
Toshiaki Ishii ◽  
Nozomu Fujimoto ◽  
...  

2021 ◽  
Vol 13 (18) ◽  
pp. 10002
Author(s):  
Hong Zhang ◽  
Wenying Wang ◽  
Zaixue Li ◽  
Chuanlun Yang ◽  
Shuang Liang ◽  
...  

The extensive accumulation of spent mushroom substrate (SMS) owing to the large-scale production of edible fungi is causing environmental problems that cannot be ignored. Co-composting is a promising method for agricultural and animal husbandry waste disposal. In this study, the composition and function of microbial communities in the process of cattle manure–maize straw composting with SMS addition were compared through an integrated meta-omics approach. The results showed that irrespective of SMS addition, the predominant fungi were Ascomycota, while the dominant bacteria were Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes. High temperature promoted the evolution from Gram-negative bacteria (Bacteroides, Proteobacteria) to Gram-positive bacteria (Firmicutes, Actinomycetes). The composting process was accelerated by SMS addition, and the substrate was effectively degraded in 14 days. Metaproteomics results showed that the dominant microorganism, Planifilum fulgidum, secreted large amounts of S8, M17, and M32 proteases that could degrade macromolecular protein substrates in the presence of SMS. Planifilum fulgidum, along with Thermobifida fusca and Melanocarpus albomyces, synergistically degraded hemicellulose, cellulose, and protein. In addition, the dominant microorganisms related to the initial raw materials such as Pichia, Lactobacillus in the microbial agent and Hypsizygus in SMS could not adapt to the high-temperature environment (>60 °C) and were replaced by thermophilic bacteria after 5 days of composting.


1993 ◽  
Vol 40 (7) ◽  
pp. 519-524 ◽  
Author(s):  
Yoshihito SANO ◽  
Naruki ITO ◽  
Shunsuke MURAMATSU ◽  
Yasuyuki UZUKA

2007 ◽  
Vol 124-126 ◽  
pp. 1285-1288 ◽  
Author(s):  
Jong Ung Kim ◽  
Jeong A Lee ◽  
Beyong Hwan Ryu ◽  
Ki Won Jun ◽  
In Ho Kim ◽  
...  

The synthesis of high-quality monodispersed nanocrystal is very important. Typical synthetic method is rapid nucleation by injection of an organometallic precursor into a solvent maintaining the reaction temperature. Since these methods are discontinuous processes, they are not efficient for large-scale production of monodisperse nanocrystals. In this study, continuous microchannel reaction technique is presented for synthesis of monodisperse lead selenide nanocrystals in a diphenyl ether as high-temperature organic media. The microchannel reactor was used due to its possibility of continuous process and reproducibility of narrow size distribution in nanocrystal synthesis. The synthesis was carried out in microchannel reactor (800 μm diameter) made from PTFE. Lead oleate and TOP-Se were used as organic precursor and diphenyl ether as high-temperature organic solvents. Lead selenide particles with a size of less than 10nm could be continuously prepared by this method. The nanocrystals have been characterized by X-ray diffraction, TEM and optical absorption spectrometer.


1993 ◽  
Vol 32 (1) ◽  
pp. 129-131
Author(s):  
Naureen Talha

The literature on female labour in Third World countries has become quite extensive. India, being comparatively more advanced industrially, and in view of its size and population, presents a pictures of multiplicity of problems which face the female labour market. However, the author has also included Mexico in this analytical study. It is interesting to see the characteristics of developing industrialisation in two different societies: the Indian society, which is conservative, and the Mexican society, which is progressive. In the first chapter of the book, the author explains that he is not concerned with the process of industrialisation and female labour employed at different levels of work, but that he is interested in forms of production and women's employment in large-scale production, petty commodity production, marginal small production, and self-employment in the informal sector. It is only by analysis of these forms that the picture of females having a lower status is understood in its social and political setting.


Sign in / Sign up

Export Citation Format

Share Document