News Archive

 

 

  • On December 9, 2020, Konrad Jakubowski has successfully defended his PhD at the Materials Department ETH Zürich. In his work, he studied the materials science and optics of polymer optical bicomponent fibers under the addition of photoluminescence. We congratulate this great achievement, which was performed completely online, followed by a small PhD-hat hand over in the hallway.


     
  • ·  On December 1st 2020, Ezgi Bülbül has successfully defended her PhD at the Materials Department ETH Zürich. In her work, she studied the incursion of water molecules into a nano-structured plasma polymer coating, which is of scientific and technological relevance. We congratulate this great achievement, which was performed completely online, followed by a small PhD-hat hand over in the hallway.

Plasma polymerization using hexamethyldisiloxane (HMDSO) is revisited providing the fundamentals for a macroscopic approach based on averaged quantities only depending on electron temperature, Te, and energy invested per monomer, Epl, with respect to a threshold energy, Eth, observed for activation reactions. As an important advancement, this approach thus combines plasma physics and plasma chemistry.
Contact: Dr. Dirk Hegemann, dirk.hegemann@empa.ch
Source: http://dx.doi.org/10.1002/ppap.202000176
More information (author = Hegemann):
https://www.dora.lib4ri.ch/empa/author-list
 

  • Facile strategy to flame retard epoxy resins

    In this work, we have combined silica nano-composites and an Empa developed non-toxic gas phase active flame retardant to improve the fire performance of epoxy material cured with an aliphatic hardener. Flame retardation of such epoxy resins are very challenging. however, our approach enabled us to obtain non-dripping V0 rating in UL 94 test (highest classification).
    Bifulco etl.al.

  • Verstehen wir wie PO2-Radikale aus Organophosphorverbindungen entstehen?

    PO2-Radikale werden als sehr wichtig beim Prozess der Flammeninhibierung und der Treibstoffkatalyse im Flugzeug angeschaut. Jedoch war bis jetzt nicht klar, welche chemischen Vorgänge effektiv zur Bildung der PO2-Radikale führen. In unseren kürzlich veröffentlichten Arbeiten konnten wir durch experimentelle Daten und Simulationen, Phosphorzwischenprodukte und deren Reaktionswege identifizieren, welche zur Bildung von PO2-Radikalen führen.
    Liang et.al.

  • Origin and destiny of micro plastic fibers

    We have participated in an Empa study of B. Nowak and in an Eawag study of D. Mitrano, which assess the origins of micro plastic fibers released during the textile washing process, as well as their fate in a wastewater treatment plant. The remarkable result shows that a large portion of wash-released fibers are already produced and embedded in the textile during the production process. It was also shown that most of the released micro plastic fibers are retained in a wastewater treatment plant.
    Schmiedgruber, M., R., et al.
    Frehland, S., et al.
    Cai, Y., et al.
    Cai, Y., et al.

  • The Plasma & Coating group actively participates in the recently founded R2RNet network:
    https://www.iap.fraunhofer.de/en/press_releases/2020/r2r-net.html
    21 European partners from industry, research organizations and universities are pooling their expertise in the continuous functionalization of surfaces in the roll-to-roll process. Our knowledge on upscaling of plasma processing as well as the available pilot-plant reactors are highly regarded to enable transfer to industry.

  • We developed luminescent melt-spun fibers, which can enhance the performance of solar cells. Using molecular dynamics simulations, we analyzed the impact of dye solubility in polymer melts on the resulting optical properties. https://doi.org/10.1016/j.matdes.2020.108518

  • Rudolf Hufenus is guest editor of a special issue of Materials (impact factor 2.972), entitled "Novel Synthetic Fibers for Textile Applications". Submission to this open access journal are very welcome (deadline 31 December 2020).

  • Fragrant liquid-core fibers

    We have developed fibers that release the scent of roses or cloves – permanently. What's more, the liquid-core fibers can also be equipped with other active ingredients.

  • Honour for Dirk Hegemann
    https://www.empa.ch/documents/56045/0/Hegemann+Dirk/087bb4c2-13ea-4996-ac91-623719273d2e?t=1579180182081
    Dirk Hegemann has been appointed "Editor-in-Chief" for the journal Plasma Processes and Polymers from 2020 on after acting for two years as "Co-Editor-in-Chief". Congratulations! (January 2020)

  • Update on Empa developed flame-retardants

    A joint research with Bruag AG has led to the development of new class of P-N flame-retardants for application in wood-based materials. Empa developed EDA-DOPO flame retardant is now Reach registered. https://www.empa.ch/web/s604/eda-dopo-reach


  • HYDRO_BOT: The skiing jacket that keeps you dry. A membrane embedded within conductive textile layers effectively transports sweat away from the body using electro osmosis. Coatings developed by Advanced Fibers enable electrical conductivity and wettability required for the success of the technology.
     
  • HYDRO_BOT

  • 80 plasma scientists and industrial researchers from 15 different countries met for the 5th International Workshop Plasma Science & Interfaces 201 at Empa St. Gallen on 18th/19th October 2018, to discuss latest results in the field.http://www.visiondynamics.nl/


    http://www.visiondynamics.nl/
  • In our recently published article in the Nature journal “scientific reports” we could verify the hypothesis that water confined inside a gradient polymer matrix can orient and thus generate a collective dipole field, which is significantly extending over many nanometers.