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Zeitschriftenartikel

  • Kirsten Wommer
  • Kristina Wanieck

Biomimetic Research for Applications Addressing Technical Environmental Protection

In: Biomimetics vol. 7 pg. 182.

  • (2022)

DOI: 10.3390/biomimetics7040182

Biomimetic research has increased over the last decades, and the development process has been systemized regarding its methods and tools. The aim of biomimetics is to solve practical problems of real-life scenarios. In this context, biomimetics can also address sustainability. To better understand how biomimetics research and development can achieve more sustainable solutions, five projects of applied research have been monitored and analyzed regarding biological models, abstracted biological principles, and the recognition of the applied efficiency strategies. In this manuscript, the way in which sustainability can be addressed is described, possibly serving as inspiration for other projects and topics. The results indicate that sustainability needs to be considered from the very beginning in biomimetic projects, and it can remain a focus during various phases of the development process
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel

  • K. Dehm
  • T. Walter
  • M. Weichselgartner
  • R. Crisp
  • Kirsten Wommer
  • Martin Aust
  • N. Vogel

Sustainable Repellent Coatings Based on Renewable Drying and Nondrying Oils

In: Advanced Materials Interfaces pg. 2202032.

  • (2022)

DOI: 10.1002/admi.202202032

Contamination of surfaces can cause loss of performance in a variety of applications. Bioinspired coatings based on the lotus or pitcher plants provide surface topographies that create superhydrophobic or slippery features with self-cleaning properties. However, typical fabrication procedures often involve potentially toxic chemicals, perfluorinated compounds, nondegradable polymers, and energy-intensive methods, with negative consequences for the environment. Here, a sustainable coating process based on renewable materials to prepare superhydrophobic and liquid-infused coatings with minimal environmental impact is presented. A scalable spray coating protocol is used. Synthetic liquid and polymeric materials are substituted with natural drying oils, i.e., oils that react with ambient oxygen and cure to solid materials, as polymeric binder in which silica particles are partially embedded. The self-cleaning characteristics against aqueous contaminations are investigated as a function of the drying oil used as binder. The assessment of the mechanical stability reveals the advantage of an underlying “primer layer” of the pure oil. Furthermore, it is demonstrated that oils from renewable sources can act as lubricants for the creation of slippery surfaces. The efficiency of such sustainable slippery coatings in reducing concrete adhesion points toward their applicability in real world scenarios.
  • TC Freyung
  • Maschinenbau und Mechatronik
  • NACHHALTIG
Zeitschriftenartikel

  • T. Walter
  • T. Hein
  • M. Weichselgartner
  • Kirsten Wommer
  • Martin Aust
  • N. Vogel

Dispersion-based, scalable fabrication of repellent superhydrophobic and liquid-infused coatings under ambient conditions

In: Green Chemistry vol. 24 pg. 3009-3016.

  • (2022)

DOI: 10.1039/D2GC00579D

Superhydrophobic and liquid-infused porous coatings provide effective repellency against contaminations and ensure efficient performance of surfaces in a wide range of applications. Conventional fabrication processes of such coatings typically require fluorinated components, toxic solvents, and elevated temperatures, and therefore contribute to environmental pollution. Here, we present a dispersion-based, fluorine-free coating system that produces highly repellent surface coatings at ambient conditions. Our system is based on aqueous dispersions of a polymeric binder and hydrophobic fumed silica particles, which upon drying self-organize into a micro- and nanostructured thin film with superhydrophobic properties, characterized by a water contact angle above 150° and a contact angle hysteresis below 10°. An additional dispersion-based coating step allows infusing these structures with silicone oil, thus producing a lubricant-infused repellent coating mimicking the pitcher plant. Water droplets on such coatings exhibit efficient repellency properties, characterized by low sliding angles (<5°) and contact angle hysteresis of water droplets (<10°). Our method provides a versatile, dispersion-based toolbox to create functional, repellent coatings in a simple, scalable and environmentally benign process.
  • TC Freyung
  • Maschinenbau und Mechatronik
  • NACHHALTIG
Bericht/Report

  • R. Pauli
  • Roland Zink
  • Kirsten Wommer
  • Stefan Küspert
  • Anna Marquardt

Mit Jugendlichen den öffentlichen Stadtraum der Zukunft gestalten. . Akronym: freYOUNG

Technische Hochschule Deggendorf/Technologie Campus Freyung

  • 2016 (2016)
  • TC Freyung
Vortrag

  • Kirsten Wommer

Bionik als Methode für Produktoptimierung und Innovation

Science Park der Johannes Kepler Universität Linz Linz, Österreich

  • 23.04.2014 (2014)
  • TC Freyung
  • NACHHALTIG
Vortrag

  • Kirsten Wommer

Bionik als Methode für Produktoptimierung und Innovation

In: Businessworkshop Bionik

ITG Salzburg. Haus der Natur Salzburg, Österreich

  • 25.03.2014 (2014)
  • TC Freyung
  • NACHHALTIG
Vortrag

  • Kirsten Wommer

Lehrerfortbildung Bionik

Bildungswerk der Bayerischen Wirtschaft e.V. Stockdorf

  • 14.11.2013 (2013)
  • TC Freyung