Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Light weight construction for aeronautics and transport: sustainably repairing and recycling CFRP

07.03.2016

High performance carbon fiber reinforced plastics (CFRP) have firmly established themselves in modern airplanes. Repairs, however, are very laborious and often even impossible. Most of the time, the entire component has to be replaced. The PYCO Research Division at the Fraunhofer Institute for Applied Polymer Research IAP in Potsdam, Germany, has developed a simple, cost-effective and energy-efficient way to make sustainable repairs. Moreover, entire components can be completely recycled in a process in which the expensive carbon fibers are reclaimed. Researchers will present their developments at JEC World in Paris from March 8 to 10, 2016 in Hall 5a, stand D52.

Composites made from crosslinked polymers – so-called thermosets – are reinforced with carbon, glass or natural fibers. Their rich spectrum of properties have increased their importance in aerospace, the automotive industry, wind power generation, shipbuilding, railway construction, building construction, and civil engineering.


Defective airplane components made from carbon fiber reinforced plastics may soon be repaired or recycled easily and cost-effectively.

mev-Verlag

Yet, even the best material can become damaged or show wear and tear. Engineers must then decide whether the defective area should be painstakingly and expensively patched, or whether the entire component has to be replaced.

“Repairing and recycling polymer-based composites are inseparably linked to resource efficiency and sustainability”, explains Dr. Christian Dreyer, who leads the Research Division Polymeric Materials and Composites PYCO at the Fraunhofer IAP. “Finite resources increase the importance of sustainable management and the use of recyclable and repairable polymer materials”, says Dreyer.

The researchers have therefore developed a process for repairing and chemically recycling fiber-reinforced thermosets. These are especially used as matrix resins in composites for high-stress components.

The crosslinked polymers form a very rigid structure that gives the component its shape. But it is precisely this structure that creates a problem when it comes to repairing or recycling the component. Unlike thermoplastics, once thermosets are cured, it is very difficult to chemically decompose them.

Repairing and reclaiming – simple, cost-effective and energy-efficient

“We have developed a fast and gentle way for a chemical recycling which allows highly crosslinked plastics to be broken down into their basic elements”, Dreyer explains. This development enables a component to be completely recycled or to be repaired locally. The resin matrix is gently removed from the defective area without significantly impacting the mechanical properties of the reinforcement fiber. The exposed fibers are then refilled with repair resin and cured.

The new process is also setting the standard for recycling. Until now discarded components have been either incinerated or shredded to be used as fillers. The Fraunhofer researchers have the crucial advantage when it comes to chemical recycling: the often expensive reinforcement fibers are reclaimed alongside the decomposed polymer matrix. Due to the limited size of the components, the fibers are no longer continuous filaments. Nevertheless there are many applications that use fibers measuring up to several centimeters.

Professor Alexander Böker, who heads up the Fraunhofer IAP explains: “This recycling process is of particular interest to companies since the matrix material can also be recycled on an industrial scale. This allows sufficient quantities of new ‘recycling thermosets’ to be synthesized. The Fraunhofer Pilot Plant Centre for Polymer Synthesis and Processing PAZ – a joint initiative of the Fraunhofer Institute for Applied Polymer Research IAP in Potsdam-Golm and for Microstructure of Materials and Systems IMWS in Halle/Saale – enables us to manufacture these resins in industry-relevant quantities.

Visit us at JEC World!

JEC World 2016 | March 8 – 10, 2016, Paris (F) |
Joint stand run by Carbon Composites e.V., Halle 5a, Stand D52

Exhibition grounds: Paris Nord Villepinte Exhibition Centre |
Address : CD 40, ZAC Paris Nord 2, 93420 Villepinte, France


Fraunhofer Institute for Applied Polymer Research IAP

The Fraunhofer IAP in Potsdam-Golm, Germany, specializes in research and development of polymer applications. It supports companies and partners in custom development and optimization of innovative and sustainable materials, processing aids and procedures. In addition to the environmentally friendly, economical production and processing of polymers in the laboratory and pilot plant scale, the institute also offers the characterization of polymers. Synthetic petroleum-based polymers as well as biopolymers and biobased polymers from renewable raw materials are in the focus of the institute’s work. The applications are diverse, ranging from biotechnology, medicine, pharmacy and cosmetics to electronics and optics as well as applications in the packaging, environmental and wastewater engineering or the aerospace, automotive, paper, construction and coatings industries. | Director: Prof. Dr. Alexander Böker

Contact:
Dr. Sandra Mehlhase | Press & Public Relations
Geiselbergstraße 69 | 14476 Potsdam-Golm, Germany
Phone: +49 331 568-1151 | email: sandra.mehlhase@iap.fraunhofer.de

Dr. Sandra Mehlhase | Fraunhofer-Institut für Angewandte Polymerforschung IAP

More articles from Trade Fair News:

nachricht LZH shows the potential of the laser for industrial manufacturing at the LASYS 2016
25.05.2016 | Laser Zentrum Hannover e.V.

nachricht Aachen Center for 3D Printing at RapidTech 2016: Additive Manufacturing for Medium-Size Companies
25.05.2016 | Fraunhofer-Institut für Lasertechnik ILT

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Computational high-throughput screening finds hard magnets containing less rare earth elements

Permanent magnets are very important for technologies of the future like electromobility and renewable energy, and rare earth elements (REE) are necessary for their manufacture. The Fraunhofer Institute for Mechanics of Materials IWM in Freiburg, Germany, has now succeeded in identifying promising approaches and materials for new permanent magnets through use of an in-house simulation process based on high-throughput screening (HTS). The team was able to improve magnetic properties this way and at the same time replaced REE with elements that are less expensive and readily available. The results were published in the online technical journal “Scientific Reports”.

The starting point for IWM researchers Wolfgang Körner, Georg Krugel, and Christian Elsässer was a neodymium-iron-nitrogen compound based on a type of...

Im Focus: Atomic precision: technologies for the next-but-one generation of microchips

In the Beyond EUV project, the Fraunhofer Institutes for Laser Technology ILT in Aachen and for Applied Optics and Precision Engineering IOF in Jena are developing key technologies for the manufacture of a new generation of microchips using EUV radiation at a wavelength of 6.7 nm. The resulting structures are barely thicker than single atoms, and they make it possible to produce extremely integrated circuits for such items as wearables or mind-controlled prosthetic limbs.

In 1965 Gordon Moore formulated the law that came to be named after him, which states that the complexity of integrated circuits doubles every one to two...

Im Focus: Researchers demonstrate size quantization of Dirac fermions in graphene

Characterization of high-quality material reveals important details relevant to next generation nanoelectronic devices

Quantum mechanics is the field of physics governing the behavior of things on atomic scales, where things work very differently from our everyday world.

Im Focus: Graphene: A quantum of current

When current comes in discrete packages: Viennese scientists unravel the quantum properties of the carbon material graphene

In 2010 the Nobel Prize in physics was awarded for the discovery of the exceptional material graphene, which consists of a single layer of carbon atoms...

Im Focus: Transparent - Flexible - Printable: Key technologies for tomorrow’s displays

The trend-forward world of display technology relies on innovative materials and novel approaches to steadily advance the visual experience, for example through higher pixel densities, better contrast, larger formats or user-friendler design. Fraunhofer ISC’s newly developed materials for optics and electronics now broaden the application potential of next generation displays. Learn about lower cost-effective wet-chemical printing procedures and the new materials at the Fraunhofer ISC booth # 1021 in North Hall D during the SID International Symposium on Information Display held from 22 to 27 May 2016 at San Francisco’s Moscone Center.

Economical processing

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Networking 4.0: International Laser Technology Congress AKL’16 Shows New Ways of Cooperations

24.05.2016 | Event News

Challenges of rural labor markets

20.05.2016 | Event News

International expert meeting “Health Business Connect” in France

19.05.2016 | Event News

 
Latest News

LZH shows the potential of the laser for industrial manufacturing at the LASYS 2016

25.05.2016 | Trade Fair News

Great apes communicate cooperatively

25.05.2016 | Life Sciences

Thermo-Optical Measuring method (TOM) could save several million tons of CO2 in coal-fired plants

25.05.2016 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>