Quantitative imaging of heterogeneous dynamics in drying and aging paints.
Drying and aging paint dispersions display a wealth of complex phenomena that make their study fascinating yet challenging. To meet the growing demand for sustainable, high-quality paints, it is essential to unravel the microscopic mechanisms underlying these phenomena. Visualising the governing dynamics is, however, intrinsically difficult because the dynamics are typically heterogeneous and span a wide range of time scales. Moreover, the high turbidity of paints precludes conventional imaging techniques from reaching deep inside the paint. To address these challenges, we apply a scattering technique, Laser Speckle Imaging, as a versatile and quantitative tool to elucidate the internal dynamics, with microscopic resolution and spanning seven decades of time. We present a toolbox of data analysis and image processing methods that allows a tailored investigation of virtually any turbid dispersion, regardless of the geometry and substrate. Using these tools we watch a variety of paints dry and age with unprecedented detail.
Physical Chemistry and Soft Matter, Wageningen University &Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands.|Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands.
Hanne M
HM
van der Kooij
Physical Chemistry and Soft Matter, Wageningen University &Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands.
Remco
R
Fokkink
Physical Chemistry and Soft Matter, Wageningen University &Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands.
Jasper
J
van der Gucht
Physical Chemistry and Soft Matter, Wageningen University &Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands.
Joris
J
Sprakel
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