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001-es BibID:	BIBFORM064085
Első szerző:	Banerjee, Sanjib
Cím:	Photoinduced Smart, Self-Healing Polymer Sealant for Photovoltaics / Sanjib Banerjee, Ranjan Tripathy, David Cozzens, Tibor Nagy, Sandor Keki, Miklos Zsuga, Rudolf Faust
Dátum:	2015
ISSN:	1944-8244 1944-8252
Megjegyzések:	Polyisobutylene (PIB)-based polymer networks potentiallyuseful as smart coatings for photovoltaic devices have beendeveloped. Low molecular weight coumarin functional triarm star PIBwas synthesized via a single step SN2 reaction of bromoallyl functionaltriarm star PIB with 4-methylumbelliferone or umbelliferone in thepresence of sodium hydride. Quantitative end functionality wasconfirmed by matrix-assisted laser desorption/ionization time-of-flightmass spectrometry. UVA (?max = 365 nm) induced reversible photodimerizationof the coumarin moieties resulted in cross-linkedelastomeric films exhibiting self-healing behavior. The extent ofphotodimerization/photoscission was monitored by UV?vis spectroscopy. The low oxygen (1.9 ? 10?16 mol m m?2 s?1Pa?1) and moisture (46 ? 10?16 mol m m?2 s?1 Pa?1) permeability of the cross-linked polymer films suggest excellent barrierproperties of the cross-linked polymer films. The self-healing process was studied by atomic force microscopy (AFM). For this,mechanical cuts were introduced in the cross-linked PIB films through micromachining with an AFM tip and the rate of healinginduced by UV, sunlight, or both was followed by taking AFM images of the film at different time intervals during the repairprocess
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban polyisobutylene photochemistry self-healing functional coatings photovoltaic devices
Megjelenés:	ACS Applied Materials & Interfaces 7 : 3 (2015), p. 2064-2072. -
További szerzők:	Tripathy, Ranjan Cozzens, David Nagy Tibor (1988-) (vegyész) Kéki Sándor (1964-) (polimer kémikus) Zsuga Miklós (1944-) (polimer kémikus) Faust, Rudolf
Pályázati támogatás:	K-101850 OTKA TÁMOP-4.2.4.A/2- 11/1-2012-0001 TÁMOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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