Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Plasma technology for solvent-free utility wood

28.07.2010
The DURAWOOD research project modifies wood surfaces so that wood preservatives adhere to them better and makes it difficult for harmful fungi to colonise the wood. So-called plasma technology is a highly promising approach. ttz Bremerhaven is evaluating the effectiveness of the process with a genetic detection method.

In order to raise the competitiveness of wood compared to other materials, it is necessary to develop a cost-efficient method of wood protection which is free of toxic chemicals and nevertheless guarantees the wood's long durability.

DURAWOOD, a research project funded by the European Union, has set itself the objective of developing a cost-effective, ecological, and high-performance method: the so-called DURAWOOD process uses electrical gas discharge (plasma) to treat wooden surfaces. The aim is to alter the surface characteristics of the wood so that wood preservatives can adhere to it better and thus smaller amounts of fungicide be needed.

So that wood is attractive for customers, it must be possible to guarantee the durability of treated wooden facades for at least 5 to 8 years and without the need for any additional maintenance. New EU legislation (2004/42/EC) demands the replacement of solvent-based wood preservatives for exterior purposes. However, facades which have been treated with water-based preservatives are more susceptible to discolouring and damage from mould, blue-stain fungi, and other wood-decay fungi. The aim is for a pre-treatment of the wood by means of plasma tech-nology to improve the effectiveness of this water-soluble wood preservative.

Plasma technology seals the wood surface

The plasma technology is based on applying the principle of electrical gas discharge where a so-called plasma is temporarily produced. The plasma is a gas or gas mix which has been partly or fully ionised and thus contains free charge carriers such as ions, charged molecules or electrons. The plasma is produced with the aid of a DCSBD (Diffuse Coplanar Surface Barrier Discharge) electrode of the newest genera-tion. The wood is transported past the electrode and treated section by section with plasma. The aim of the plasma treatment is to change the characteristics of the wood surface, whereby two applications are used: On the one hand, the adhesion of coatings subsequently applied, such as water-based wood preservatives, is improved by means of a hydrophilisation of the wood surface, and on the other hand the wettability of the wood can be reduced by a marginal variation in the plasma parameters, as a result of which hydrophobic surfaces are produced which increase the water resistance of the wood.

Genetic detection method for mould

The DURAWOOD technology aims to facilitate a cost-efficient, durable, and environmentally friendly wood preservative and to strengthen the competitiveness of the European wood-processing industry. To test the efficiency of this new approach, the Molecular Genetics Department at ttz Bremerhaven is developing a rapid detection method for wood-decay fungi, with which the woods treated with the DURAWOOD process are being tested for their effective protection against fungi. For this purpose, pure cultures of the fungus being studied were incubated together with the wood either treated with DURAWOOD or untreated. The next step investigates how far the fungus has grown into the wood, using the highly sensitive PCR method, which is able to detect even only a few fungus cells.

ttz Bremerhaven is one of three research partners. Together with IRIS (Innovacio i Recerca Industrial i Sostenible, Barcelona), the Project Coordinator, and the Slovak University of Technology in Bratislava, ttz is a research service provider in the consortium. The consortium's industrial partners are composed on the one hand of the following wood-processing firms: Ing. Ján Šestina – SETA from Slovakia, Kartas Kontrplak Sanayi Ticaret from Turkey, and Aryecla, S.L. from Spain, and on the other hand of the following companies in the supply chain of the targeted technology: Plasma Technologic s.r.o. from the Czech Republic, which is specialised in plasma technology; PAM-ak s.r.o. from Slovakia and SETAS KIMYA SAN AS from Turkey are both manufacturers of wood coatings.

ttz Bremerhaven regards itself as an innovative provider of research services and operates in the field of application-oriented research and development. Under the umbrella of ttz Bremerhaven, an international team of experts is working in the areas of food, environment, health and consulting services.

Contact:
Christian Colmer
Head of Communication and Media
ttz Bremerhaven
Fischkai 1
D-27572 Bremerhaven (Germany)
Tel.: +49 (0)471 48 32 - 124
Fax: +49 (0)471 48 32 - 129
ccolmer@ttz-bremerhaven.de

Christian Colmer | idw
Further information:
http://www.ttz-bremerhaven.de

More articles from Materials Sciences:

nachricht Watching atoms move in hybrid perovskite crystals reveals clues to improving solar cells
22.11.2017 | University of California - San Diego

nachricht Fine felted nanotubes: CAU research team develops new composite material made of carbon nanotubes
22.11.2017 | Christian-Albrechts-Universität zu Kiel

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: New proton record: Researchers measure magnetic moment with greatest possible precision

High-precision measurement of the g-factor eleven times more precise than before / Results indicate a strong similarity between protons and antiprotons

The magnetic moment of an individual proton is inconceivably small, but can still be quantified. The basis for undertaking this measurement was laid over ten...

Im Focus: Frictional Heat Powers Hydrothermal Activity on Enceladus

Computer simulation shows how the icy moon heats water in a porous rock core

Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

IceCube experiment finds Earth can block high-energy particles from nuclear reactions

24.11.2017 | Physics and Astronomy

A 'half-hearted' solution to one-sided heart failure

24.11.2017 | Health and Medicine

Heidelberg Researchers Study Unique Underwater Stalactites

24.11.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>