Cross-section of a mechanically isolated wood fibre by electron microscopy.
Mechanically-isolated wood fibres show several different properties in comparison to chemically-isolated fibres. This is one of the most recent results of a project funded by the Austrian Science Fund FWF at the University of Natural Resources and Applied Life Sciences, Vienna. The project yields significant findings on the structural changes in wood fibres after exposure to moisture and tension. The current results are important for both the structural analysis of wood as well as for the investigation of innovative applications for this classic material.
Wood is one of the most common and versatile natural organic materials. It harmoniously combines high strength with high deformation capability. How these seemingly contradictory properties may be explained, is a topic of today´s wood research. For the analysis of wood’s numerous properties, individual wood fibres had been isolated by means of a chemical procedure until now - although researchers have suspected for a long time that this chemical procedure leads to changes in wood so that scientific results might be doubtful.
In response to this problem, scientists at the University of Natural Resources and Applied Life Sciences, Vienna developed an alternative isolation method for wood fibres. Fibres are isolated from wood in a mechanical procedure using fine tweezers. "We have thus succeeded in isolating wood fibres whose cell walls are not changed or destroyed by chemical substances", says Prof. Stefanie Stanzl-Tschegg at the Institute of Physics and Material Sciences when explaining the advantages of the method. "If we now compare mechanically isolated wood fibres with those that have been traditionally isolated with chemicals then we are able to better understand the weaknesses of individual methods. In this way, we obtain much new information about the structure and properties of wood." Additionally, the scientists were able to show that the mechanical isolation method is also capable of isolating single fibres of other natural materials such as hemp or flax in a much better way than previously possible.
Till C. Jelitto | alfa
Energy crop production on conservation lands may not boost greenhouse gases
13.03.2017 | Penn State
How nature creates forest diversity
07.03.2017 | International Institute for Applied Systems Analysis (IIASA)
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
24.03.2017 | Materials Sciences
24.03.2017 | Physics and Astronomy
24.03.2017 | Physics and Astronomy