Luminescent elastomeric Janus particles

•A low-cost method to produce luminescent elastomeric particles with asymmetric morphology.•Wrinkles formation controlled by UV irradiation time and luminescent compound concentration.•Luminescent micrometric elastomeric particles obtained by microfluidics. We report on a low-cost and low-tech metho...

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Bibliographic Details
Published in:Journal of colloid and interface science 2013-11, Vol.410, p.124-130
Main Authors: Faita, F.L., Trindade, A.C., Godinho, M.H., Bechtold, I.H.
Format: Article
Language:English
Subjects:
Asymmetry
atomic force microscopy
chemical bonding
Chemistry
Colloidal state and disperse state
Elastomer
Elastomers
encapsulation
Exact sciences and technology
Fluorescence
General and physical chemistry
Irradiation
Janus particles
leaching
Luminescence
Morphology
optical properties
periodicity
Physical and chemical studies. Granulometry. Electrokinetic phenomena
scanning electron microscopy
spectroscopy
toluene
Tuning
ultraviolet radiation
urea
Ureas
urethane
Urethanes
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Summary:•A low-cost method to produce luminescent elastomeric particles with asymmetric morphology.•Wrinkles formation controlled by UV irradiation time and luminescent compound concentration.•Luminescent micrometric elastomeric particles obtained by microfluidics. We report on a low-cost and low-tech method for the preparation of luminescent micro- and millimeter elastomeric particles with asymmetric morphology. The method of fabrication consists in UV-irradiating soft urethane/urea fluorescent spheres, which are then extracted in toluene and dried. Wrinkles appear on the irradiated portions of the particles surfaces, and the spatial periodicity can be controlled with variation in UV irradiation time and the amount of the luminescent compound. The spheres are thus composed of an urethane/urea network in which the tris(8-hydroxyquinolinato)aluminum (Alq3) fluorescent compound was incorporated. The asymmetric morphology and the optical properties of the resultant particles have been confirmed by scanning electron microscopy, atomic force microscopy, optical microscopy, and UV–Vis spectrophotometry. The system shows negligible leaching, and the encapsulation of the Alq3 without recourse to covalent bonding to the polymeric matrix has the advantage of allowing the tuning of the spheres morphology and fluorescence.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2013.07.073