Document Detail


Direct measurements of critical stresses and cracking in thin films of colloid dispersions.
MedLine Citation:
PMID:  18518494     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Useful films can be formed by drying colloidal dispersions, but the negative capillary pressure generated often promotes cracks. Complex lateral flows during drying compromised previous measurements of the pressure required for cracking. Here we report data for the onset of cracking, and the additional cracks that appear at higher pressures, from high-pressure ultrafiltration experiments on homogeneously compressed films. A comparison of the data with expectations from theory confirms that cracking is controlled by elastic recovery, though an energy criterion only provides a lower bound. Our experiments also identify the role of flaws as nucleation sites that initiate cracks.
Authors:
Weining Man; William B Russel
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-05-13
Journal Detail:
Title:  Physical review letters     Volume:  100     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-06-03     Completed Date:  2008-07-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  198302     Citation Subset:  IM    
Affiliation:
Department of Chemical Engineering, Princeton University, Princeton, NJ 08544, USA.
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MeSH Terms
Descriptor/Qualifier:
Colloids / chemistry*
Elasticity
Models, Chemical*
Pressure
Chemical
Reg. No./Substance:
0/Colloids

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