Natürliche Ressourcen und Schadstoffe  
Sources, Transport & Assessment of Air Pollutants
Sustainable Mobility and Transport
Sustainable Production
Exhaust Gas Treatment
Impacts of Pollutants on Engineered Systems

Impact of Pollutants on Engineered Systems

Problem:
Interaction of Materials and Engineered Systems with „aggressive” environments can induce loss of their functionality (waste of natural resource, necessity of recycling and high cost for replacements). Furthermore, emission of their degradation products into the environment is an increasing concern.

Motivation and goals:

  • A microscopic understanding of the environment (temperature, humidity) and identification of material specific surface influence of pollutants (ex: H2S, SOx, NOx, O3, Cl-, nanoparticles). New aspect related micro and nanoscale materials development are considered.
  • Development of joint experimental setups and research procedures for surface characterization under controlled environmental condition. Furthermore Influence of residual contamination and additives of organic materials on small structures in combination with humidity is characterized.
  • Link to the extended analytical characterization Network of the EMPA and multiscale modelling


 

Research Topics

1) Metal (bulk and Coatings): Patrik Schmutz

  • Loss of surface functionality through oxidative degradation process (Aluminium)
  • The sulphur surface chemistry (H2S,SOx to SO42-) mechanisms
  • Tin (Sn) atmospheric interaction

 

2) Organic materials: Patrik Schmutz

  • Characterization of initiation phase of degradation mechanisms
  • Release of biocides and nanoparticles in building materials
  • Long term integrity (chemical, physical, mechanic) of optimized polymer coatings

 

3) Cement based materials: Andreas Leemann

  • Mechanisms of sulphate attack
  • Alkali-aggregate-reaction (expansion)
  • Concrete erosion in wastewater treatment plants (acid attack)
Contact
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