Incorporation of polyfluorenes into poly(lactic acid) films for sensor and optoelectronics applications

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Martelo, L (Author) Other; Jimenez, A (Author) Other; Valente, AJM (Author) Other; Burrows, HD (Author) Other; Marques, AT (Author) Other; Forster, M (Author) Other; Scherf, U (Author) Other; Peltzer, M (Author) Other; Fonseca, SM (Author) Other

Journal

Title: Polymer International

Vol. 61

Pages: 1023-1030

ISSN: 0959-8103

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 6 Citations

Other information

Authenticus ID: P-002-9NW

DOI: 10.1002/pi.4176

Abstract (EN): Films of neat and plasticized biodegradable poly(lactic acid) (PLA) matrices containing anionic conjugated polyelectrolytes, poly[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7-diyl-alt-arylenes, with 1,4-phenylene and 4,4?-p-terphenylene, respectively, as arylene groups or a neutral poly(9,9-dialkylfluorene) for comparison were prepared by solution casting. These films were characterized using differential scanning calorimetry, thermogravimetry, scanning electron microscopy and fluorescence spectroscopy. In addition, the effects of plasticizer on the thermal properties and the oxygen permeability of the PLA films were measured through the oxygen transmission rate. Results show that it is possible to obtain thin, optically transparent and luminescent films with potential in oxygen sensing, exhibiting good thermal and photochemical stability. At high polyelectrolyte content, evidence is found for phase separation and aggregate formation and it is no longer possible to obtain completely homogeneous films. The possibility of incorporating the cationic metal complex tris(2,2'-bipyridyl)ruthenium(II) into plasticized PLA films containing conjugated polyelectrolytes for dual-wavelength ratiometric luminescence sensing is also discussed. Copyright (C) 2012 Society of Chemical Industry

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8