Simple production of photoluminescent polyester coating using lanthanide‐doped pigment

Abumelha, Hanna M.

doi:10.1002/bio.4030

Cited by 95 publications

(141 citation statements)

References 43 publications

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“…Thus, SrAl 2 O 4 :Eu 2+ ,Dy 3+ is a highly valuable choice to provide fluorescent and photochromic authentication to documents without adversely influencing their inherent characteristics, such as mechanical properties, appearance and handling. [ 58–62 ]…”

Section: Introductionmentioning

confidence: 99%

Production of photochromic nanocomposite film via spray‐coating of rare‐earth strontium aluminate for anti‐counterfeit applications

et al. 2021

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New photochromic film was developed toward the preparation of anti‐counterfeiting documents utilizing inorganic/organic nanocomposite enclosing a photoluminescent inorganic pigment and a polyacrylic binder polymer. To generate a translucent film from pigment/polyacrylic nanocomposite, the phosphorescent strontium aluminum oxide pigment should be well‐dispersed in the solution of the polyacrylic‐based binder without agglomeration. The photochromic nanocomposite was applied efficiently onto commercial cellulose paper documents utilizing the effective and economical spray‐coating technology followed with thermofixation. A homogeneous photochromic film was immobilized onto cellulose paper surface to introduce a transparent film changing to greenish‐yellow upon exposure to ultraviolet light as depicted by CIE coloration measurements. The photochromic effect was monitored at lowest pigment concentration (0.25 wt%). The spray‐coated paper documents exhibit two absorbance bands at 256 and 358 nm, and two fluorescence peaks at 433 and 511 nm. The morphologies of the spray‐coated documents were explored. The spray‐coated paper sheets showed a reversible photochromic effect without fatigue under ultraviolet irradiation. The rheology of the produced photochromic composites as well as the mechanical properties and photostability of the spray‐coated documents were studied.

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Section: Introductionmentioning

confidence: 99%

Production of photochromic nanocomposite film via spray‐coating of rare‐earth strontium aluminate for anti‐counterfeit applications

et al. 2021

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“…Long‐persistent lanthanide‐doped phosphors have been of particular interest as they have been utilized in the production of numerous commercial products such as luminescent indicators, smart textiles, and switches. [ 11,12 ] Amongst those long‐persistence phosphorescent pigments, the rare‐earth‐doped strontium aluminates (LSA; SrAl 2 O 4 :Eu 2+ ,Dy 3+ ) are outstanding phosphors due to their nontoxicity, [ 13,14 ] long phosphorescence (>10 h), high brightness, recyclability, and nonradioactivity. [ 15 ] Generally, long‐persistent photoluminescent phosphors consist of two main components including light energy traps and crystals of collective elements.…”

Section: Introductionmentioning

confidence: 99%

Preparation of flame‐retardant, hydrophobic, ultraviolet protective, and luminescent transparent wood

et al. 2021

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Transparent wood with multifunctional properties has recently attracted more attention as an efficient building product. Here, we describe the development of transparent wood with long‐persistent phosphorescence, tough surface, high durability, photostability, and reversibility without fatigue, and with ultraviolet shielding, superhydrophobicity, and flame‐retardant activity. This long‐persistent phosphorescent, or glow‐in‐the‐dark, smart wood exhibited an ability to continue emitting light for prolonged periods of time. The photoluminescent translucent wooden substrate was prepared by immobilizing lignin‐modulated wooden bulk with an admixture of methylmethacrylate (MMA), ammonium polyphosphate (APP), and lanthanide‐doped strontium aluminate (LSA; SrAl2O4:Eu2+,Dy3+) phosphor nanoparticles. The photoluminescent transparent wood displayed a colour switch from colourless to bright white beneath ultraviolet (UV) light and greenish‐yellow in the dark as reported by Commission Internationale de l'Éclairage laboratory colorimetric space coordinates. The generated phosphorescent wooden substrates demonstrated an absorbance band at 365 nm and an emission band at 516 nm. The phosphorescent transparent wood was improved flame‐retardant properties, ultraviolet shielding, and superhydrophobic properties, as well as a reversible long‐persistent phosphorescent responsiveness to UV light without fatigue. The current approach demonstrated a potential large‐scale production strategy for multifunctional transparent wooden substrates for a range of applications such as smart windows, gentle indoor and outdoor lighting, and safety directional signs in buildings.

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“…[ 58,59 ] Therefore, the development of the three‐dimensional network could be enhanced by aluminium in the elemental composition of LASO, and could function as a coordination cross‐linker between negative charges on the PS surface, leading to a higher molecular weight three‐dimensional network. [ 60,61 ]…”

Section: Resultsmentioning

confidence: 99%

Facile production of smart superhydrophobic nanocomposite for wood coating towards long‐lasting glow‐in‐the‐dark photoluminescence

et al. 2021

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A smart photoluminescent nanocomposite surface coating was prepared for simple industrial production of long‐persisting phosphorescence and superhydrophobic wood. The photoluminescent nanocomposite coatings were capable of continuing to emit light in the dark for prolonged time periods that could reach 1.5 h. Lanthanide‐doped aluminium strontium oxide (LASO) nanoparticles at different ratios were immobilized in polystyrene (PS) and developed as a nanocomposite coating for wood substrates. To produce transparency in the prepared nanocomposite coating, LASO was efficiently dispersed in the form of nanoscaled particles to ensure homogeneous dispersion without agglomeration in the PS matrix. The coated wood showed an absorption band at 374 nm and two emission bands at 434 nm and 518 nm. The luminescence spectra showed both long‐persisting phosphorescence as well as photochromic fluorescence relying on the LASO ratio. The improved superhydrophobicity and resistance to scratching of the coated wood could be attributed to the LASO NPs incorporated in the polystyrene matrix. Compared with the uncoated wood substrate, the coated LASO‐PS nanocomposite film also displayed photostability and high durability. The current study demonstrated the potential high‐scale manufacturing of smart wood for some applications such as safety directional signs in buildings, household products, and smart windows.

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Simple production of photoluminescent polyester coating using lanthanide‐doped pigment

Cited by 95 publications

References 43 publications

Production of photochromic nanocomposite film via spray‐coating of rare‐earth strontium aluminate for anti‐counterfeit applications

Production of photochromic nanocomposite film via spray‐coating of rare‐earth strontium aluminate for anti‐counterfeit applications

Preparation of flame‐retardant, hydrophobic, ultraviolet protective, and luminescent transparent wood

Facile production of smart superhydrophobic nanocomposite for wood coating towards long‐lasting glow‐in‐the‐dark photoluminescence

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