Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 34, Issue 22, Pages 1742-1746Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201300640
Keywords
gold nanoparticles; optical healing; polymer nanocomposites; stimuli-responsive polymers
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- le Fonds quebecois de la recherche sur la nature et les technologies of Quebec (FQRNT)
- China Scholarship Council (CSC)
- major project of Ministry of Education of China [313036]
- FQRNT
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A general method for very fast and efficient optical healing of crystalline polymers is reported. By loading a very small amount of gold nanoparticles (AuNPs) in either poly(ethylene oxide) (T-m approximate to 63 degrees C) or low-density polyethylene (T-m approximate to 103 degrees C), the heat released upon surface plasmon resonance (SPR) absorption of 532 nm light by AuNPs can melt crystallites in the interfacial region of two polymer pieces brought into contact; and the subsequent recrystallization of polymer chains on cooling merges the two pieces into one. The fracture strength of such repaired sample can reach the level of the undamaged polymer after 10 s laser exposure. Moreover, in addition to an ability of long-distance remote and spatially selective healing, the optical method also works for polymer samples immersed in water. image
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