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- W2484208514 abstract "Multilayer composites that utilize polymer and metal oxide thin films are the enabling technology for many flexible electronic devices. However, crack formation within the brittle inorganic layers that arise from defects as well as the flexing of these multilayer composite materials allow the influx of atmospheric water, a major source of device degradation. Thus, a composite material that can initiate self-healing upon the influx of environmental water through defects or stress induced cracks would find potential applications in permeation barriers. In the present study, reactive metal oxide precursors such as titanium(IV) chloride (TiCl4) or trimethylaluminum (AlMe3) were encapsulated within the pores of a degradable polymer such as polylactic acid (PLA). The PLA polymer containing metal oxide healing agent were prepared as spheres or fibers. The PLA spheres or fibers were reactive under controlled humidity resulting in hydrolysis of the degradable polymer shell and subsequent release of the reactive metal oxide precursor. Hydrolysis of the metal oxide precursors results in formation of solid titanium oxides or aluminum oxides at the surface of the delivery vehicle. The efficacy of this self-healing delivery system was further demonstrated by the integration of these reactive fibers or spheres in a polymer planarization layer (PMMA) of a multilayer barrier film. The introduction of nanocracks in the barrier film led to the release of the metal oxide precursor and the formation of titanium oxide or aluminium oxide nanoparticles in the cracks. In this study we have established the first site-specific, smart, self-healing system for multilayer barrier films through the delivery of metal oxide nanoparticles by reactive composite fibers or spheres." @default.
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- W2484208514 date "2010-01-01" @default.
- W2484208514 modified "2023-09-27" @default.
- W2484208514 title "Preparation of a Delivery System for Smart Coatings by Electrostatic Deposition" @default.
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- W2484208514 doi "https://doi.org/10.1021/bk-2010-1050.ch003" @default.
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