These lightweight materials consist of two main components with, for example, woven carbon fibers and a polymer matrix material. Current application areas for such composites include aircraft manufacturing.
However, the materials are also increasingly being used in the automotive industry due to their high stability and because they have a lower density than aluminum. Carbon fibers are relatively expensive because the process used to manufacture them is costly and requires a lot of energy.
The recycling of carbon fibers therefore has to be carried out as efficiently as possible. As reported in the latest edition of the "Pictures of the Future" research magazine, the Siemens approach here involves recovering the fibers in the same form they were used and without any loss of mass.
These days, carbon fibers are usually extracted from used components or production scrap by breaking down resins in a pyrolytic process at relatively high temperatures. In the solvolysis recycling procedure employed by scientists at Siemens Corporate Technology, the resin component is heated under pressure at a temperature of 200 degrees Celsius and converted to low molecular-weight soluble alcohols with the help of water. No environmentally damaging solvents are used in the process, which also requires much less energy than would be required to manufacture new fibers.
The woven fabric recovered from the workpiece retains its shape and its fibers remain intact. As a result, it can be immediately further processed. The fibers' mechanical properties are also nearly fully retained. As a next step, the researchers are now looking for ways to use the recycled fibers in new types of reshaped workpieces.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
Intelligent wheelchairs, predictive prostheses
20.12.2017 | Fraunhofer-Institut für Produktionstechnik und Automatisierung IPA
Jelly with memory – predicting the leveling of com-mercial paints
15.12.2017 | Fraunhofer-Institut für Produktionstechnik und Automatisierung IPA
A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.
In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...
A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.
By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...
Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
23.02.2018 | Physics and Astronomy
23.02.2018 | Health and Medicine
23.02.2018 | Physics and Astronomy