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Adsorption and Desorption of Organic Molecules from Thin Cellulose Films Investigated by Temperature Programmed Desorption
Elias Henögl
CD Laboratory for Mass Transport through Paper
https://bigmail.TUGraz.at/outgoing/elias_henoegl_181115_627/6992_de.html
11:15 - 12:15 Wednesday 21 October 2020 PH01150

In order to improve paper packaging solutions e.g. for food packaging, it is vital to understand molecular transport mechanisms in paper, in relation to the paper production parameters. Besides the transport pathways through the paper fibre network and the transport mechanisms which have to be understood, the adsorption and desorption behaviour of molecules on the cellulose surface play a key role, considering that the transport of adsorbed molecules is delayed or halted.

Therefore, the adsorption behaviour of organic molecules on cellulose films was investigated in this work by temperature programmed desorption (TPD). The method of TPD, as well as the preparation and characterisation of thin films gained from regenerated trimethylsilyl cellulose (TMSC) and from microfibrillated cellulose (MFC) will be presented. Further, the gained desorption energy estimates and TPD-fingerprints will be discussed in detail.