FRAUNHOFER UMSICHT: COMPOUNDS FOR ADDITIVE MANUFACTURING, GEOTEXTILES AND WEARABLES
Whether biodegradable geotextiles, wearables from thermoplastic elastomers or functional textiles from 3D printers - the scope of plastics developed at the Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT is wide.
Insights into these projects were provided from October 16th - 23rd in Düsseldorf: At the K, scientists presented their work on thermally and electrically conductive, biodegradable, bio-based compounds as well as compounds suitable for additive production.
Textile composites from the 3D printer
In the "AddiTex" project, plastics were developed that are applied to textiles in layers using 3D printing and give them functional properties. A special challenge in the development was the permanent adhesion: The printed plastic had to be both a strong bond with the textile and sufficiently flexible to be able to participate in movements and twists.
A flexible and flame-retardant compound was developed, which is particularly suitable for use in the field of textile sun and sound insulation, as well as a rigid compound, which is used, among other things, for reinforcing the shape of protective and functional clothing.
Geotextile filter for technical-biological bank protection
Geotextile filters for technical-biological bank protection are the focus of the "Bioshoreline" project. It stands for gradually biodegradable nonwovens, which allow a near-natural bank design of inland waterways with plants. They consist of renewable raw materials and are intended to stabilize the soil in the shore area until the plant roots have grown sufficiently and take over both filter and retention functions. The ageing and biodegradation of the fleeces begin immediately after installation, until the fleeces are gradually completely degraded.
Prototypes of the geotextile filters are currently being tested. Female scientists evaluate the plant mass formed above and below ground with and without geotextile filters as well as the influence of the soil type on plant growth and the biological degradation of the filter.
Wearables made of thermoplastic elastomers
In addition, Fraunhofer UMSICHT is developing novel, electrically conductive and flexible compounds that can be processed into thermoplastic-based bipolar plates. These plastics are highly electrically conductive, flexible, mechanically stable, gas-tight and chemically resistant and - depending on the degree of filling of electrically conductive additives - can be used in many different ways. For example, in electrochemical storage tanks (batteries), in energy converters (fuel cells), in chemical-resistant heat exchangers or as resistance heating elements.
Another possible field of application for these plastics: Wearables. These portable materials can be produced easily and cheaply with the new compounds. It is conceivable, for example, to form garments such as a vest by means of resistance heating elements. The idea behind this is called Power-to-Heat and enables the direct conversion of energy into heat.
"AddiTex" is funded with a grant from the State of North Rhine-Westphalia using funds from the European Regional Development Fund (ERDF) 2014-2020 "Investments in growth and employment". Project Management Agency: LeitmarktAgentur.NRW – Projektmanagement Jülich.
The "Bioshoreline" project (funding reference: 22000815) is funded by the Federal Ministry of Food and Agriculture (BMEL) on the basis of a resolution of the German Bundestag.