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Nanomaterials 2018, 8(5), 352;

Fabrication Flexible and Luminescent Nanofibrillated Cellulose Films with Modified SrAl2O4: Eu, Dy Phosphors via Nanoscale Silica and Aminosilane

Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
Center for Renewable Carbon, University of Tennessee, Knoxville, TN 37996, USA
Authors to whom correspondence should be addressed.
Received: 6 April 2018 / Revised: 2 May 2018 / Accepted: 15 May 2018 / Published: 22 May 2018
(This article belongs to the Special Issue Cellulose Nanomaterials)
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Flexible 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized nanofibrillated cellulose (ONFC) films with long afterglow luminescence containing modified SrAl2O4: Eu2+, Dy3+ (SAOED) phosphors were fabricated by a template method. Tetraethyl orthosilicate (TEOS) and (3-aminopropyl) trimethoxy-silane (APTMS) were employed cooperatively to improve the water resistance and compatibility of the SAOED particles in the ONFC suspension. The structure and morphology after modification evidenced the formation of a superior SiO2 layer and coarse amino-compounds on the surface of the phosphors. Homogeneous dispersions containing ONFC and the modified phosphors were prepared and the interface of composite films containing the amino-modified particles showed a more closely packed structure and had less voids at the interface between the cellulose and luminescent particles than that of silica-modified phosphors. The emission spectra for luminescent films showed a slight blue shift (3.2 nm) at around 512 nm. Such flexible films with good luminescence, thermal resistance, and mechanical properties can find applications in fields like luminous flexible equipment, night indication, and portable logo or labels. View Full-Text
Keywords: nanofibrillated cellulose; luminescent; phosphor; modification; composite film nanofibrillated cellulose; luminescent; phosphor; modification; composite film

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Zhang, L.; Lyu, S.; Chen, Z.; Wang, S. Fabrication Flexible and Luminescent Nanofibrillated Cellulose Films with Modified SrAl2O4: Eu, Dy Phosphors via Nanoscale Silica and Aminosilane. Nanomaterials 2018, 8, 352.

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