�Green Carbon� from Algae for Automotive Applications

Abstract

Due to the continuous decrease in the level of oil resource, nowadays researchers from all fields are concerned with the creation of new bio plastics with special properties. The present work presents a series of such properties, which become achievable when reinforcing organic fibre materials obtained by reactive extrusion of thermoplastic Polyurethan (TPU) with Polylactid-Acid (PLA) in a twin-screw extruder and covalently linked into PLA-TPU-Blends, through the innovative one-step process technology, using the IMC Krauss Maffei injection moulding compounder, at the IKT University of Stuttgart. The elongation at break of PLA-TPU-Blends and the impact strength could be increased without significant reduction of strength and stiffness. A balanced relation between improved impact strength and reduced stiffness can be achieved by varying of the blend components. By using the partially biobased Polyurethane and natural fibres, a biobased content of more than 90% could be achieved. More and more advanced technologies allow the manufacture of components with reinforcements made of glass fibres, natural or carbon fibres obtained from polypropylene or Lignin. Due to their low specific weight compared to glass, carbon fibres are preferred for lightweight structures in the automotive or aeronautics industries. Green Carbon fibres, made in innovative ways from acrylonitrile resulting in the production of Bio-Diesel from algae, can successfully replace the conventional carbon fibres of Polypropylene, having identical properties. Fibre reinforcement aims to improve mechanical strength and impact resistance and increases the dimensional stability under heat of the composite. This feasibility study shows a method to realize fibre-reinforced materials using Green Carbon fibres with remarkable stability and rigidity similar or better than aluminum and steel for lightweight constructions.

[Retracted] Legal Guarantee of Smart City Pilot and Green and Low‐Carbon Development

“…The government can organize regulation through policy guidance, strategic planning, and regulatory constraints. Therefore, it will play a guiding role in the development of China's green and smart cities [ 15 ]. The top-level design of a green smart city can be planned.…”

“…erefore, it will play a guiding role in the development of China's green and smart cities [15]. e top-level design of a green smart city can be planned.…”

The Tribology of Composite Materials Used for Manufacturing Brake Shoes

“…This represents the most important and profitable step in reducing noise at the source [1][2][3]. From a legislative point of view, the tendency of imposing noise emission limitations for rolling stock, as well as introducing financial mechanisms for promoting a more silent railway traffic, continues to increase at European level [4,5]. The experts [6][7][8][9] advise priority to be given for measures taken at the source (rails and vehicles), as these have a higher costefficiency ratio.…”