Document Detail

Pressurized vascular systems for self-healing materials.
MedLine Citation:
PMID:  21957119     Owner:  NLM     Status:  MEDLINE    
An emerging strategy for creating self-healing materials relies on embedded vascular networks of microchannels to transport reactive fluids to regions of damage. Here we investigate the use of active pumping for the pressurized delivery of a two-part healing system, allowing a small vascular system to deliver large volumes of healing agent. Different pumping strategies are explored to improve the mixing and subsequent polymerization of healing agents in the damage zone. Significant improvements in the number of healing cycles and in the overall healing efficiency are achieved compared with prior passive schemes that use only capillary forces for the delivery of healing agents. At the same time, the volume of the vascular system required to achieve this superior healing performance is significantly reduced. In the best case, nearly full recovery of fracture toughness is attained throughout 15 cycles of damage and healing, with a vascular network constituting just 0.1 vol% of the specimen.
A R Hamilton; N R Sottos; S R White
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2011-09-28
Journal Detail:
Title:  Journal of the Royal Society, Interface / the Royal Society     Volume:  9     ISSN:  1742-5662     ISO Abbreviation:  J R Soc Interface     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-03-23     Completed Date:  2012-07-26     Revised Date:  2013-06-27    
Medline Journal Info:
Nlm Unique ID:  101217269     Medline TA:  J R Soc Interface     Country:  England    
Other Details:
Languages:  eng     Pagination:  1020-8     Citation Subset:  IM    
Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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MeSH Terms
Biocompatible Materials / chemistry
Biomimetic Materials / chemistry*
Materials Testing / methods*
Wound Healing
Reg. No./Substance:
0/Biocompatible Materials; 0/Polymers

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