Luminescent cellulose fibers activated by Eu3+-doped nanoparticles

Abstract

UV-active cellulose fibers were obtained by dry-wet method spinning an 8 % by weight acellulose solution in N-methylomorpholine-N-oxide (NMMO) modified by europium-doped gadolinium oxyfluoride Gd 4 O 3 F 6 :Eu 3? containing 5 mol (%) of the dopant. Photoluminescent nanoparticles were introduced in the in powder form into a polymer matrix during the process of cellulose dissolution in NMMO. The dependencies of emission intensity on excitation energy and the concentration of Gd 4 O 3-F 6 :Eu 3? nanoparticles in the final cellulosic products were examined by photoluminescence spectroscopy (excitation and emission). The fiber structure was studied by X-ray powder diffraction analysis. The size and dispersity of the nanoparticles in the polymer matrix were evaluated using scanning electron microscopy and X-ray microanalysis. The influence of different concentration particles (in the range from 0.5 to 5 % by weight) on the mechanical properties of the fibers, such as tenacity and elongation at break, were determined.

Application of nanocomposite cellulose fibers with luminescent properties to paper functionalization

“…High flexibility of the manufacturing process of cellulose fibres makes it possible to modify them by introducing into the spinning solution various chemically-different materials that allow obtaining functional fibres with specific properties. In this way cellulose fibres with, for example, electrically conductive and magnetic properties (Liu et al 2013), bioactive (Kulpinski et al 2011), sensor fibres (Rubacha 2007), and in recent years also these with luminescent properties were obtained (Kulpinski et al 2012a). On the basis of previous research it can be concluded that an additional advantage of this technology is the possibility to use modifiers with nanometric size of particles.…”

“…paper patching jacketed bullets, filters), and the space industry. The fibres containing in their structure specific chemical compounds with luminescent properties (Kulpinski et al 2012a) can be effective identifiers of both textile products, paper documents, and those made of plastic. They can also be helpful in management and control of production ) and transport and storage of products (not only the textile ones).…”

“…As a result of above problems, the presented research was carried out. The aim of the research was to evaluate the affinity of previously developed luminescent Lyocell type fibres (Kulpinski et al 2012a) to natural cellulose fibres in terms of their papermaking properties (e.g. their ability to fibrillate, entanglement and bonding).…”

PAN fibers with nanoprecipitated Ag and Au for use in textronics

“…A new generation of PAN fibers was elaborated (e.g. fibers with ceramic nanoparticles, such as silica, hydroxyapatite, montmorillonite or carbon nanotubes) [6][7][8][9][10][11].…”

“…In the Department of Man-Made Fibers Technical University of Lodz, composite fibers with silver nanoparticles [8], magnetic or luminescent particles [9,10] or montmorillonite [11] have been obtained by introducing suitable additives into the bulk (by adding to spinning dope).…”