Institute of Solid State Physics

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Characterization of soft fibrous materials with X-ray tomography: From scanning challenges to pore network and fiber bond analysis
Eduardo Machado-Charry
Institute of Solid State Physics, Graz University of Technology
https://cloud.tugraz.at/index.php/s/gXrPtjMANmBLXgc
15:30 - 16:00 Monday 11 May 2020 

Paper is quite essential material in our society, and its production has a significant impact on the environment. Research on paper seeks to improve the recycling and making processes. Moreover, research also helps in improving the quality of paper for specific applications. There is a good knowledge of the properties of this material at the macroscopic level. Nevertheless, there is still a lot to learn about its properties at the microscopic scale, and how these determine the macroscopic ones. In our group, we are particularly interested in the interdependence of transport mechanisms and the pore network formed between fibers in the paper.

In the first part of this presentation, I will provide an overview of our efforts to study the pore network by using x-ray micro-computed tomography. I will cover all the steps starting from how to optimize the sample preparation for the measurements, to image analysis, and ending with the quantification, and statistical analysis of pore network-related deScriptors.

In the second part, I will show preliminary results on the estimation of the relative contact area between paper fibers, using the novel Ptychography x-ray computed tomography. This technique has allowed us to achieve high-resolution down to the nanometer in 3D.

At 16:00, there will be an opportunity to ask questions at https://tugraz.webex.com/meet/p.hadley