Production of smart nanocomposite for glass coating toward photochromic and long-persistent photoluminescent smart windows

Al‐Qahtani, Salhah D.; Binyaseen, Adel M.; Aljuhani, Enas; Aljohani, Meshari M.; Alzahrani, Hanan; Shah, Reem; El‐Metwaly, Nashwa M.

doi:10.1016/j.ceramint.2021.09.174

Cited by 41 publications

(20 citation statements)

References 48 publications

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“…The reason for this UV light protection could be attributed to the high absorption properties of LdSAO as a result of its electron structure. [55] Table 3 and Figure 6 show the water contact angle of PE sheets.…”

Section: Ultraviolet Light Shielding and Hydrophobic Screeningmentioning

confidence: 99%

Preparation of transparent photoluminescence smart window by integration of rare‐earth aluminate nanoparticles into recycled polyethylene waste

et al. 2022

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Novel photoluminescent nanocomposite sheets were prepared for simple commercial manufacturing of transparent and luminous photochromic smart windows. A simple physical integration of lanthanide-doped strontium aluminium oxide (LdSAO) nanoparticles into recycled polyethylene (PE) waste produced a smart nanocomposite with persistent phosphorescence and photochromic properties. Because the nanoparticle form of LdSAO is important for developing transparent materials, LdSAO nanoparticles were well dispersed in the PE matrix. Both the morphologies and chemical compositions of the LdSAO nanoparticles and LdSAO-containing luminescent PE sheets were investigated. Both LdSAO-free and photoluminescent PE sheets were colourless in normal daylight. However the LdSAO-containing PE luminescent samples only exhibited a brilliant green colour under ultraviolet (UV) light and a greenish-yellow colour in the dark as verified by Commission Internationale de l'éclairage laboratory parameters. Both absorbance and emission bands were monitored at 377 and 436/517 nm, respectively. The LdSAO-containing PE luminescent sheets were compared with the LdSAO-free sample using both photoluminescence spectroscopy and for their mechanical properties and were found to have improved scratch resistance, UV protection, and superhydrophobic activity. Due to the added LdSAO, photoluminescence, decay, and lifetime spectral tests confirmed its photochromic fluorescence and long-lasting phosphorescence characteristics. The PE@LdSAO nanocomposite sheets displayed UV protection, photostability, hydrophobicity, and excellent durability compared with the blank LdSAO-free PE sheet.

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Section: Ultraviolet Light Shielding and Hydrophobic Screeningmentioning

confidence: 99%

Preparation of transparent photoluminescence smart window by integration of rare‐earth aluminate nanoparticles into recycled polyethylene waste

et al. 2022

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“…The vial was repeatedly hit by a ball milling machine (silicon carbide; 0.1 cm) for 23 h to generate the corresponding REA nanoparticles (Al-Qahtani et al, 2022).…”

Section: Synthesis Of Rea Nanoparticlesmentioning

confidence: 99%

“…Rare-earth strontium aluminate nanoparticles were obtained by synthesizing the REA micropowder utilizing a prior process (Abdelhameed et al, 2021), which was then exposed to top-down procedures to provide the corresponding phosphor nano-scaled powder (Al-Qahtani et al, 2022). By using TEM, the particle size of REA nanoparticles was determined to be between 40 and 300 nm as shown in Figure 3 Figure 5 shows the emission spectra of the generated nanofibers PP-5 versus the excitation period.…”

Section: Preparing Photochromic Filmsmentioning

confidence: 99%

Authentication of documents using polypropylene immobilized with rare‐earth doped aluminate nanoparticles

Al‐Qahtani

Snari

Alkhamis

et al. 2022

Microscopy Res & Technique

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Anticounterfeiting of commercial products has been improved using photochromism as an intriguing approach. In order to develop a mechanically reliable nanocomposite, the engineering procedure of the anticounterfeiting nanocomposite must be improved. Rare-earth doped aluminate/polypropylene (REA/PP) hybrid nanofibers were successfully made by electrospinning, and they were shown to be mechanically stable and highly photoluminescent, making them ideal for anticounterfeiting applications. UV-induced photochromic anticounterfeiting properties were monitored in the synthesized nanocomposite films. In order to ensure that the REA-PP film is completely transparent, REA must be embedded into the polypropylene nanofibers in nano-sized particle shape to facilitate a better dispersion without agglomeration of REA particles in polypropylene matrix. The morphology and structure of REA were studied by transmission electron microscopy and X-ray diffraction. The morphologies and chemical contents of the polypropylene nanofibrous films were studied by scanning electron microscopy, X-ray fluorescence, and energy-dispersive X-ray spectroscopy. The REA-PP nanofibrous film showed absorbance and emission maxima at 365 and 517 nm, respectively. When exposed to UV light, the photochromic activity of the transparent nanofibrous substrates to greenish-yellow was rapid and reversible without fatigue. Hydrophobicity of REA-PP films increased without affecting their original look or mechanical properties, while increasing the REA content. It was possible to produce ultraviolet-induced photochromic nanofibrous films that were transparent, flexible, and cost-effective. As a result of this method, numerous anticounterfeiting materials could be developed toward a better marketplace with both economy and community values. Highlights• Rare-earth aluminate/polypropylene (REA/PP) electrospun nanofibers were prepared.• The photochromic transparent nanofibers displayed green emission under UV light.• The nanofibrous films were flexible, mechanically stable and highly luminescent.• Films showed absorbance and emission maxima at 365 and 517 nm, respectively.• Hydrophobicity was improved without affecting the films original properties.

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“…Scientists have been motivated to develop energy‐saving products for residential buildings with increased light transmittance and minimized energy consumption. [ 1 ] Glass has been extensively used to provide windows that allow light to pass through it. However, safety and cost concerns arise from the fragile nature of glass windows.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of lanthanide doped aluminate phosphor onto recycled polyester toward the development of long‐persistent photoluminescence smart window

et al. 2022

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Smart window can be defined as switchable material whose light transmission is altered upon exposure to light, voltage, or heat. However, smart windows are usually produced from expensive and breakable glass materials. Herein, transparent smart window with long-persistent phosphorescence, high optical transmittance, ultraviolet (UV) protection, rigid, high photostability and durability, an d superhydrophobicity was developed from recycled polyester (PET). Recycled polyester waste (RBW) was simply immobilized with different ratios of lanthanide-doped aluminate nanoparticles (LdAN) to provide a long-persistent phosphorescent polyester smart window (LdAN@PET) with an abili ty to persist emitting light for extended time periods. The solid-state high temperature technique was used to prepare lanthanide-doped aluminate (LdA) micro-scale powder. Then, the top-down technique was applied to afford the corresponding LdAN. Recycled shredded recycled polyester bottles were charged into a hot bath to provide a clear plastic shred bulk, which was then well-mixed with LdAN and drop-casted to provide long-persistent luminescent smart window. In order to improve the phosphor dispersion in the PET bulk, LdAN was synthesized in the nanoparticle form which was characterized utilizing transmission electron microscopy (TEM). For better preparation of translucent smart window of long-persistent phosphorescent polyester, LdAN must be homogeneously dispersed in the PET matrix without agglomeration. The morphology and chemical composition were studied by Fourier-transform infrared (FTIR) spectra), X-ray fluorescence (XRF) analysis, scanning electron microscopy (SEM), and energy-dispersion X-ray spectroscopy (EDX). In addition, spectral profiles of excitation and emission, and decay and lifetime were used to better understand the photoluminescence properties. The hardness properties were also investigated. The developed phosphorescent transparent polyester smart window demonstrated a color switch to intense green underneath UV irradiation and greenish-yellow under darkness as verified by CIELab color parameters. The afterglow polyester smart window showed an absorption wavelength at 365 nm and two phosphorescence intensities at 442 and 512 nm. An enhanced UV protection, photostability and hydrophobic activity were detected. The luminescent polyester substrates with lower LdAN ratios demonstrated rapid and reversible

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Production of smart nanocomposite for glass coating toward photochromic and long-persistent photoluminescent smart windows

Cited by 41 publications

References 48 publications

Preparation of transparent photoluminescence smart window by integration of rare‐earth aluminate nanoparticles into recycled polyethylene waste

Preparation of transparent photoluminescence smart window by integration of rare‐earth aluminate nanoparticles into recycled polyethylene waste

Authentication of documents using polypropylene immobilized with rare‐earth doped aluminate nanoparticles

Immobilization of lanthanide doped aluminate phosphor onto recycled polyester toward the development of long‐persistent photoluminescence smart window

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