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SUMMARY:SPECIAL SEMINAR - Drying\, Diffusion and Interdiffusion in Multico
 mponent and Multilayer Films - Professor Wilhelm Schabel\, Karlsruhe Insti
 tute of Technology (KIT)
DTSTART:20230601T140000Z
DTEND:20230601T144500Z
UID:TALK202057@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Film drying processes of multicomponent and multilayer polymer
 ic films play and important role in many applications and processes\, such
  as surface coatings\, membranes\, adhesives\, optical films\, battery ele
 ctrodes\, catalyst coated layer for PEM FC and WE\, printed multilayer str
 uctures and additive manufacturing. After liquid coating\, drying\, diffus
 ion\, interdiffusion\, migration have impact on microstructure\, distribut
 ion and functionality of the final product. Mass transport and diffusion a
 re often a crucial factor. Despite the huge practical relevance\, multimat
 erial drying\, mass transport and inter)diffusion is experimentally and by
  modeling not sufficiently well investigated\, often not proper or too com
 plicated described and understood. In practice there are almost no experim
 ental data to describe this properly. One main reason is the lack of exper
 iments in multicomponent systems for experimentally validated theoretical 
 descriptions of multicomponent diffusion. Inverse Micro Raman Spectroscopy
  (IMRS) offers in-situ measurement of solvent and polymer distribution in 
 thin films during drying with a high spatial and quantitative resolution o
 f all components. Experiments are performed in situ in thin films while ap
 plying well-defined boundary conditions and measuring local concentrations
  of components at different positions within the sample. The influence of 
 different multicomponent material systems will be discussed in different s
 tudies. Numerical new model-based description of the multi-component mass 
 transport will be presented. Models were validated for different polymer a
 nd solvent systems. Influence of solvent content and molar mass of polymer
 s on the interdiffusion in multilayer systems was studied. It could be sho
 wn that interdiffusion lengths strongly correlates with solvent content an
 d polymer mass. The model was verified for different material systems.Inve
 stigation on different material systems and the influence of glass transit
 ion were \nperformed at drying of thin Nanofilms towards high Deborah numb
 ers with in situ QCM measurements. The accuracy of the drying curve measur
 ements was below 0\,1 nm thickness \nchanges during in situ drying. Relaxa
 tion kinetic effects dominates diffusion kinetic effects\, this can be sho
 wn by changing the Deborah number in the different experiments towardsNano
 -Thin films.
LOCATION:Open Plan Area\, Institute for Energy and Environmental Flows\, M
 adingley Rise CB3 0EZ
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