Rok 2022

• Preparation and Properties of Thermoplastic Polyurethane Composites Filled with Powdered Buckwheat Husks

  Publikacja

  • M. Włoch
  • P. Landowska

  - Materials - Rok 2022

  Bio-based fillers for the polymer composites are still interesting from the scientific and industrial point of view, due to their low cost and renewable nature. In this work partially green composites were obtained by the mixing of thermoplastic poly(ester-urethane) with the unmodified and modified (by acetylation) grinded buckwheat husks. Obtained biocomposites were characterized in the terms of their chemical structure (FTIR),...

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Rok 2020

• The impact of air humidity on the operation of proton exchange membrane fuel cells determined using dynamic electrochemical impedance spectroscopy

  Publikacja

  • E. Janicka
  • M. Mielniczek
  • Ł. Gaweł
  • K. Darowicki
  • P. Landowska

  - ELECTROCHIMICA ACTA - Rok 2020

  This paper describes the changes in the fuel cell impedance across a range of current loads and humidity changes. The changes of each equivalent circuit parameters representing specific processes occurring in fuel cells, as a function of humidity and current changes, were determined. Within the combined scope of current and humidity, the optimal working conditions of the cells were determined, corresponding to the lowest impedance...

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