Luminescent cellulose fibers modified with cerium fluoride doped with terbium particles

Abstract

This article describes UV-active cellulose fibers obtained by dry-wet spinning method. The fibers have been formed from an 8% by weight cellulose solution in N-methylomorpholine-N-oxide (NMMO) modified by Ce 0.85 Tb 0.15 F 3 nanocrystals. The modifier was synthesized by wet chemical method, coprecipitation approach. The host was chosen as the most promising one for the green emitting Tb 31 ions. Photoluminescent nanoparticles were introduced into the polymer matrix during the process of dissolving cellulose in NMMO. The modifier occurred in the form of white paste, consisting of luminescent nanoparticles dispersed in glycerine. The dependencies between the concentration of nanocrystals, emission intensity, and excitation energy of the final cellulosic luminescent products were examined by photoluminescence spectroscopy. The size and structure of Ce 0.85 Tb 0.15 F 3 nanocrystals were studied by X-ray powder diffraction analysis. The dispersion of the nanoparticles in the polymer matrix was evaluated using scanning electron microscopy and transmission electron microscopy. The real content of luminescent nanocrystals in the fibers was estimated as well. The influence of different concentrations of modifier particles (in the range from 0.5 to 5% by weight) on the mechanical properties of the fibers was determined. POLYM. COMPOS., 37:153-160, 2016.

Application of nanocomposite cellulose fibers with luminescent properties to paper functionalization

“…The results presented in this paper are the continuation of previous works (Kulpinski et al 2012a, b;Kulpinski et al 2016) which focused only on obtaining the cellulose fibres with various luminescent inorganic modifiers. In the next step the obtained luminescent fibres are introduced to the paper pulp to produce functionalized material.…”

White and red emitting LaF 3 nanocrystals doped with Eu 2+ and Eu 3+ ions: Spectroscopic and magnetic studies

“…Thanks to the effect of admixture with adequately chosen lanthanide (Ln 3þ ) ions, the materials based on RE fluorides can be an alternative to the currently used phosphors [9]. REF 3 can be used in optoelectronics for construction of optic fibres and amplifiers of optical signals and are promising materials for lasers and in some areas of medicine, especially in bioimaging [10e13].…”

Polymer-Oxide Composites: Toward New Optical Materials

“…The XRD patterns of the samples under study showed the set of diffraction peaks related with X-ray scattering on the MCC lattice in the range 10-45 • of 2θ [45,51,52]. These relatively wide intensive peaks are located at 16, 22.5, and 34.5 • of 2θ.…”

“…Due to their mechanical flexibility they can be useful in manufacturing of the electronic and opto-electronic devices (solar cells, super-capacitors, lithium-ion batteries, "paper" electronics [38][39][40], luminescence sensors [41][42][43]). Incorporated with luminescent oxides cellulose based composites have shown their importance as advanced optical materials [44][45][46][47]. That is why the second part of this work is devoted to results of our own study of cellulose matrix micro/nanocomposite (CMM/NC) containing luminescence inorganic oxide micro/nanoparticles.…”