Magnetic Resonance Imaging of moisture transport through coatings on wood during water uptake and drying
Korte toelichting presentatie:
The higher water sensitivity of waterborne coatings may negatively affect the durability of both wood and coating. Moisture transport processes in wood/coatings can be studied by Nuclear Magnetic Resonance (NMR) imaging. By combining NMR imaging with relaxometry, the state of water within wood can be identified, e.g. water bound to the cell wall, and free water in the cell lumen/vessel. This research presents how the transport of water can be monitored and quantified in terms of bound and free water during water uptake and drying. Our studies focus on understanding the moisture transport through alkyd (solvent and waterborne) and acrylic model coating formulations applied on teak, oak and pine. Our results show that the moisture permeability depends on the specific combination of wood and coating.
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dr.ir. Bart Erich
Bart Erich received his Ph.D. degree in physics at the Eindhoven University of Technology in 2006 in the group Transport in Permeable Media (TPM). His PhD work focused at NMR imaging of curing processes in alkyd coatings. Since 2006 he is working both at the Eindhoven University of Technology in the group Transport in Permeable Media (TPM) and at TNO (the Dutch organization of applied research). The group has grown to a group of 20 PhD students and post-docs. At TNO his work focuses at innovations of materials for the built environment, with special focus on coating research, transport processes and adding new functionalities to (building) materials.