Crack densification in drying colloidal suspensions
As sessile drops of aqueous colloidal suspensions dry, a close-packed particle deposit forms that grows from the edge of the drop toward the center. To compensate for evaporation over the solid’s surface, water flows radially through the deposit, generating a negative pore pressure in the deposit as...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Association for the Advancement of Science
2025
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| Online Access: | https://hdl.handle.net/1721.1/158098 |
| _version_ | 1824458132479279104 |
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| author | Lilin, Paul Ibrahim, Mario Bischofberger, Irmgard |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Lilin, Paul Ibrahim, Mario Bischofberger, Irmgard |
| author_sort | Lilin, Paul |
| collection | MIT |
| description | As sessile drops of aqueous colloidal suspensions dry, a close-packed particle deposit forms that grows from the edge of the drop toward the center. To compensate for evaporation over the solid’s surface, water flows radially through the deposit, generating a negative pore pressure in the deposit associated with tensile drying stresses that induce the formation of cracks. As these stresses increase during drying, existing cracks propagate and additional cracks form, until the crack density eventually saturates. We rationalize the dynamics of crack propagation and crack densification with a local energy balance between the elastic energy released by the crack, the energetic cost of fracture, and the elastic energy released by previously formed cracks. We show that the final spacing between radial cracks is proportional to the local thickness of the deposit, while the aspect ratio of the crack segments depends on the shape of the deposit. |
| first_indexed | 2025-02-19T04:21:02Z |
| format | Article |
| id | mit-1721.1/158098 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2025-02-19T04:21:02Z |
| publishDate | 2025 |
| publisher | American Association for the Advancement of Science |
| record_format | dspace |
| spelling | mit-1721.1/1580982025-01-28T20:08:33Z Crack densification in drying colloidal suspensions Lilin, Paul Ibrahim, Mario Bischofberger, Irmgard Massachusetts Institute of Technology. Department of Mechanical Engineering As sessile drops of aqueous colloidal suspensions dry, a close-packed particle deposit forms that grows from the edge of the drop toward the center. To compensate for evaporation over the solid’s surface, water flows radially through the deposit, generating a negative pore pressure in the deposit associated with tensile drying stresses that induce the formation of cracks. As these stresses increase during drying, existing cracks propagate and additional cracks form, until the crack density eventually saturates. We rationalize the dynamics of crack propagation and crack densification with a local energy balance between the elastic energy released by the crack, the energetic cost of fracture, and the elastic energy released by previously formed cracks. We show that the final spacing between radial cracks is proportional to the local thickness of the deposit, while the aspect ratio of the crack segments depends on the shape of the deposit. 2025-01-28T20:08:32Z 2025-01-28T20:08:32Z 2024-09-13 2025-01-28T19:56:08Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/158098 Paul Lilin et al. ,Crack densification in drying colloidal suspensions.Sci. Adv.10,eadp3746(2024). en 10.1126/sciadv.adp3746 Science Advances Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ application/pdf American Association for the Advancement of Science American Association for the Advancement of Science |
| spellingShingle | Lilin, Paul Ibrahim, Mario Bischofberger, Irmgard Crack densification in drying colloidal suspensions |
| title | Crack densification in drying colloidal suspensions |
| title_full | Crack densification in drying colloidal suspensions |
| title_fullStr | Crack densification in drying colloidal suspensions |
| title_full_unstemmed | Crack densification in drying colloidal suspensions |
| title_short | Crack densification in drying colloidal suspensions |
| title_sort | crack densification in drying colloidal suspensions |
| url | https://hdl.handle.net/1721.1/158098 |
| work_keys_str_mv | AT lilinpaul crackdensificationindryingcolloidalsuspensions AT ibrahimmario crackdensificationindryingcolloidalsuspensions AT bischofbergerirmgard crackdensificationindryingcolloidalsuspensions |