Recent Advances in 3D Weaving for Textile Preforming

2000 ◽  
Author(s):  
Larry Dickinson ◽  
Mansour Mohamed
Keyword(s):  
Large Scale ◽  
Three Dimensions ◽  
Scale Production ◽  
Recent Advances ◽  
Large Scale Production ◽  
Problems And Solutions ◽  
Weaving Technology ◽  
And Performance ◽  
Woven Structure ◽  
3D Weaving

Abstract There have been many publications on “3D Weaving”, and there are numerous patents on a variety of devices that may be used to make a “3D Woven” structure. The majority of the 3D woven products that are currently commercially available are formed by a 2D weaving process that is used to build up a preform with fibers oriented in three dimensions. Recent advances have lead to multiple insertion 3D weaving, i.e. 3D fabric formation with each process cycle, or multi-layers at one time. The 3Weaving™ process is a multiple insertion 3D weaving technology that is different from traditional weaving. These distinctions about the different processes will be detailed in this paper. Additionally, the economics, manufacturing and performance of 3D woven textile preforms for composites will be discussed. Problems and solutions in each of these areas that prevent the large scale production of advanced composites will be presented. The advantage of 3D textile preforming is the ability to take complexity and labor out of manually intensive and expensive composites fabrication processes, and put it in the relatively inexpensive automated preforming process.

scholarly journals Recent Advances in Glycerol Catalytic Valorization: A Review

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1279
Author(s):  
Manuel Checa ◽  
Sergio Nogales-Delgado ◽  
Vicente Montes ◽  
José María Encinar
Keyword(s):  
Activated Carbon ◽  
Carboxylic Acids ◽  
Large Scale ◽  
Biodiesel Production ◽  
Added Value ◽  
Scale Production ◽  
Recent Advances ◽  
Large Scale Production ◽  
Wide Range ◽  
Technological Limitations

Once a biorefinery is ready to operate, the main processed materials need to be completely evaluated in terms of many different factors, including disposal regulations, technological limitations of installation, the market, and other societal considerations. In biorefinery, glycerol is the main by-product, representing around 10% of biodiesel production. In the last few decades, the large-scale production of biodiesel and glycerol has promoted research on a wide range of strategies in an attempt to valorize this by-product, with its transformation into added value chemicals being the strategy that exhibits the most promising route. Among them, C3 compounds obtained from routes such as hydrogenation, oxidation, esterification, etc. represent an alternative to petroleum-based routes for chemicals such as acrolein, propanediols, or carboxylic acids of interest for the polymer industry. Another widely studied and developed strategy includes processes such as reforming or pyrolysis for energy, clean fuels, and materials such as activated carbon. This review covers recent advances in catalysts used in the most promising strategies considering both chemicals and energy or fuel obtention. Due to the large variety in biorefinery industries, several potential emergent valorization routes are briefly summarized.

Recent advances in the large-scale production of antibody fragments using lower eukaryotic microorganisms

1998 ◽  
Vol 149 (6) ◽  
pp. 589-599 ◽  
Author(s):  
L.G.J. Frenken ◽  
J.G.M. Hessing ◽  
C.A.M.J.J. Van den Hondel ◽  
C.T. Verrips
Keyword(s):  
Large Scale ◽  
Antibody Fragments ◽  
Scale Production ◽  
Recent Advances ◽  
Large Scale Production ◽  
Eukaryotic Microorganisms

scholarly journals Advances in applying C–H functionalization and naturally sourced building blocks in organic semiconductor synthesis

2021 ◽  
Author(s):  
Liwen Xing ◽  
Christine K. Luscombe
Keyword(s):  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Large Scale ◽  
Building Blocks ◽  
Scale Production ◽  
Recent Advances ◽  
Large Scale Production

This review presents the recent advances in the synthesis of organic semiconductors using C–H functionalization and naturally sourced building blocks to facilitate the large-scale production and commercialization of organic semiconductors.

scholarly journals Effects of post-lithography cleaning on the yield and performance of CVD graphene-based devices

2019 ◽  
Vol 10 ◽  
pp. 349-355 ◽  
Author(s):  
Eduardo Nery Duarte de Araujo ◽  
Thiago Alonso Stephan Lacerda de Sousa ◽  
Luciano de Moura Guimarães ◽  
Flavio Plentz
Keyword(s):  
Electrical Transport ◽  
Large Scale ◽  
Scale Production ◽  
Production Methods ◽  
Cvd Graphene ◽  
Large Scale Production ◽  
Conventional Production ◽  
Protection Layer ◽  
And Performance ◽  
Graphene Devices

The large-scale production of high-quality and clean graphene devices, aiming at technological applications, has been a great challenge over the last decade. This is due to the high affinity of graphene with polymers that are usually applied in standard lithography processes and that, inevitably, modify the electrical proprieties of graphene. By Raman spectroscopy and electrical-transport investigations, we correlate the room-temperature carrier mobility of graphene devices with the size of well-ordered domains in graphene. In addition, we show that the size of these well-ordered domains is highly influenced by post-photolithography cleaning processes. Finally, we show that by using poly(dimethylglutarimide) (PMGI) as a protection layer, the production yield of CVD graphene devices is enhanced. Conversely, their electrical properties are deteriorated as compared with devices fabricated by conventional production methods.

Graphitic carbon nitride (g-C3N4)-based photocatalysts for solar hydrogen generation: recent advances and future development directions

2017 ◽  
Vol 5 (45) ◽  
pp. 23406-23433 ◽  
Author(s):  
Amene Naseri ◽  
Morasae Samadi ◽  
Ali Pourjavadi ◽  
Alireza Z. Moshfegh ◽  
Seeram Ramakrishna
Keyword(s):  
Future Development ◽  
Large Scale ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Scale Production ◽  
Solar Hydrogen ◽  
Recent Advances ◽  
Large Scale Production

Analyzing the commercialization potential of g-C3N4photocatalysts for solar H2generation from an economic viewpoint and for large-scale production.

scholarly journals Modification and Performance Evaluation of a Floating Drum Biogas Digester

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
F. Uthman
Keyword(s):  
Large Scale ◽  
Constant Pressure ◽  
Industrial Wastes ◽  
Cattle Dung ◽  
Scale Production ◽  
Inlet Pipe ◽  
Animal Dung ◽  
Large Scale Production ◽  
Accumulated Temperature ◽  
And Performance

Biogas is a renewable source of energy that is obtained from the anaerobic digestion of agricultural residues, animal dung, energy crops, domestic wastes and industrial wastes. These categories of waste that produce biogas are promising sources of energy and the biotechnology process of biofuel is environmentally friendly. This study aimed at modifying, fabricating and evaluating a floating drum digester. The modified floating drum digester consists of the digester tank, gas holder tank, feeding inlet pipe, gas collector outlet, slurry outlet, thermometer and hose. The gas holder tank was inserted into the digester tank while the biogas is generated in the digester tank by pressure. The biogas was produced from the mixture of cattle dung 30 % and 50 % plant wastes. Hence, the organic waste mixed with water in the ratio of 1: 2 for the digestion process. The digestion temperature was recorded daily for a period of 21 days at constant pressure of 1.32 KN/m2 throughout the experiment. The result revealed that the minimum and maximum average temperatures are 25 to 33 oC. This shows that the ambient temperature affects the temperature in the digester and the amount of gas produced is a function of the accumulated temperature in the digester. It was observed that the biogas generated increase as temperature rise. The modified floating drum digester is affordable and it is recommended for small- and large-scale production.

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