Generation of strength in a drying film: How fracture toughness depends on dispersion properties
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
American Physical Society
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Birk-Braun, N., Yunus, K., Rees, E., Schabel, W., & Routh, A. (2017). Generation of strength in a drying film: How fracture toughness depends on dispersion properties. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 95 (022610)https://doi.org/10.1103/PhysRevE.95.022610
The fracture toughness of colloidal films is measured by characterizing cracks which form during directional drying. Images from a confocal microscope are processed to measure the crack width as a function of distance from the crack tip. Applying theory for thin elastic films the fracture toughness is extracted. It is found that the fracture toughness scales with the particle size to the −0.8 power and that the critical energy release rate scales with the particle size to the −1.3 power. In addition, the fracture toughness is found to increase at lower evaporation rates, but the film thickness does not have a significant effect.
Is supplemented by: https://doi.org/10.17863/CAM.885
We thank Professor Bill Clegg for helpful discussions, and Martin Lippert for help with matlab, as well as the Ernest-Solvay-Stiftung and Studienstiftung des deutschen Volkes for financial support of the research visit of N.B.-B. from Karlsruhe Institute of Technology (KIT) to the University of Cambridge.
EC FP6 IP (11844)
External DOI: https://doi.org/10.1103/PhysRevE.95.022610
This record's URL: https://www.repository.cam.ac.uk/handle/1810/263849