Simple preparation of long-persistent luminescent paint with superhydrophobic anticorrosion efficiency from cellulose nanocrystals and an acrylic emulsion

Al‐Qahtani, Salhah D.; Al‐nami, Samar Y.; Alkhamis, Kholood; Al‐Ahmed, Zehbah A.; Binyaseen, Adel M.; Khalifa, Mohamed E.; El‐Metwaly, Nashwa M.

doi:10.1016/j.ceramint.2021.11.179

Cited by 26 publications

(27 citation statements)

References 40 publications

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“…The transparent background of the photoluminescent polyester sheets improved the visual identification of the photochromic colorimetric transition to greenish. [ 39 ] All polyester sheets exhibited instantaneous and reversible photochromism. When excited by UV light, the polyester with phosphor concentrations of 1% or less displayed fluorescence with quick reversibility.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescent and photochromic smart window from recycled polyester reinforced with cellulose nanocrystals

et al. 2022

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Smart windows with long-persistent phosphorescence, ultraviolet (UV) light protection, high transparency, and high rigidity were developed by easily immobilizing varying ratios of lanthanide-activated aluminate phosphor nanoscale particles within a composite of recycled polyester/cellulose nanocrystals (RPET/CNC). Cellulose nanocrystals were prepared from rice straw waste. Cellulose nanocrystals were used at low concentration as both crosslinker and drier to improve both transparency and hardness. The phosphor nanoscale particles must be distributed into the recycled polyester/cellulose nanocrystals composite bulk without agglomeration to produce transparent RPET/CNC substrates. Photoluminescence characteristics were also studied using spectroscopic profiles of excitation/emission and decay/lifetime. The hardness efficiency was also examined. This transparent recycled polyester waste/ cellulose nanocrystals nanocomposite smart window has been shown to change colour under UV light to strong green and to greenish-yellow when it is dark, as proved by Commission Internationale de l'éclairage (CIE) laboratory colour parameters. It was found that the afterglow RPET/CNC smart window had phosphorescence intensities of 428, 493, and 523 nm upon excitation at 368 nm. There was evidence of improved UV shielding, photostability, and hydrophobic activity. In the presence of a low phosphor ratio, the luminescent RPET/CNC substrates showed quick and reversible fluorescence photochromic activity when exposed to UV radiation.

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Section: Resultsmentioning

confidence: 99%

Photoluminescent and photochromic smart window from recycled polyester reinforced with cellulose nanocrystals

et al. 2022

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“…The phosphor microparticles were synthesized using previous procedures. [ 28 ] Various ball mill systems were used within the top‐down method [ 29 ] to prepare the phosphor nanoparticles (PNPs). The utilization of phosphor nanoparticles leads to improved phosphor distribution within the epoxy/GO bulk.…”

Section: Methodsmentioning

confidence: 99%

“…SrAl 2 O 4 :Eu 2+ ,Dy 3+ has proved to be an efficient longpersistent phosphor due to its longer persistence time, higher brightness, photostability, and resistance to chemicals. [25][26][27][28] Fluorescence refers to light emission by a substance under an excitation source, such as an ultraviolet (UV) lamp. Conversely, phosphorescence can be defined as light emission by a substance detected after turning off the excitation source.…”

Section: Introductionmentioning

confidence: 99%

“…The substance could continue to emit light for few seconds (phosphorescence) or even hours (long-persistent afterglow). [25][26][27][28] Luminescent epoxy coatings with lanthanide-doped pigments have been a growing field due to their stable brightness, long-lasting phosphorescence, and nontoxicity. [26] These photoluminescence coatings have promising applications in displays, road markings, warning and safety signs, and decorated surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Optical properties of novel luminescent nacre‐like epoxy/graphene nanocomposite coating integrated with lanthanide‐activated aluminate nanoparticles

et al. 2022

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Nacre structure has aragonite polygonal tablets, tessellated to generate separate layers, and exhibits adjacent layers and tablets within a layer bonded by a biopolymer. Here, we report the development of a nacre‐like organic/inorganic hybrid nanocomposite coating consisting of epoxy tablets as well as rare‐earth‐activated aluminate and graphene oxide tablet/tablet interfaces. The lanthanide‐activated aluminate was prepared using a high temperature solid‐state approach followed by top‐down technology to provide the phosphor nanoparticles (PNPs). Graphene oxide nanosheets were prepared from graphite. The prepared epoxy/graphene/phosphor nanocomposites were applied onto mild steel. Covalent bonds were formed between epoxy polymer chains resin and the graphene oxide nanosheets. These interface interactions resulted in a tough surface, high tensile strength, and excellent durability. The use of phosphor in the nanoparticle form guaranteed that no agglomerations were produced throughout the hardening procedure by allowing better distribution of PNPs in the nacre‐like matrix. The generated nacre‐like substrates displayed reversible fluorescence. The excitation of the white coloured nacre‐like coats at 367 nm resulted in a green emission band at 518 nm as designated by the Commission Internationale de l'éclairage (CIE) Laboratory and photoluminescence spectra. Various analysis methods were utilized to inspect the surface structure and elemental composition of the nacre‐like coats. An improved hydrophobicity and mechanical characteristics were detected when increasing the phosphor concentration. Due to the astonishing characteristics of the prepared nacre‐like composite paint, both ceramics and metals can benefit from the current simple strategy.

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“…However, lanthanide-doped aluminates have been typical compounds as a consequence of their distinct properties like being nontoxic, nonradioactive, photostable, recyclable, thermally stable, and exhibit high brightness. Therefore, the development of photochromic strontium aluminate ink is an efficient technique for the preparation of highly durable security-encoding materials (Al-Qahtani et al, 2022). Those attributes give new boundaries to manufacture verified items of high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Preparation of photoluminescent nanocomposite ink for detection and mapping of fingermarks

Snari

Pashameah

Alatawi

et al. 2022

Microscopy Res & Technique

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Simple and efficient detection and mapping method based on a strong turn‐on fluorescent pigment was developed for fingerprint analysis. We present a phosphor powder characterized by strong emission which is useful to achieve better fingerprint detection on multicolored or photoluminescent surfaces, such as currency notes characterized by optically changeable inks and highly fluorescent positions, because it offers better contrast and reduce the difficulty of background interference. Novel photochromic ink was prepared to establish a fingerprinted colorless film onto cellulose documents with green emission for anticounterfeiting applications as illustrated by photoluminescence spectra. Inorganic/organic nanoscale composite ink was prepared from rare‐earth doped aluminate phosphor nanoparticles (PNPs; 27–49 nm) dispersed in a polyacrylic acid binding agent. PNPs were dispersed efficiently in polyacrylic acid to generate a colorless mark. The produced photochromic inks were spray‐coated onto off‐white paper sheets enclosing invisible fingermarks, and then exposed to thermofixation. Photochromic film was detected on paper surface presenting a transparent appearance under visible daylight and switchable to green under UV light. The CIE Lab parameters and photoluminescence spectra were studied under visible light and ultraviolet irradiation. The fingerprinted sheets showed fluorescence band at 517 nm upon excitation at 366 nm, showing a bathochromic shift and reversible photochromism without fatigue. The morphologies of pigment phosphor particles and fingerprinted sheets were inspected. The rheological properties of ink and mechanical behavior of the fingerprinted paper samples were explored. Highlights Novel smart ink with alkaline‐earth aluminate and polyacrylic acid was developed. Dual‐mode fluorescent photochromism was presented for latent fingerprint analysis. Off‐white fingerprinted films under daylight showed color change to green under UV. Fluorescence band monitored at 517 nm upon excitation at 366 nm. Fluorescent fingermark on paper sheets demonstrated good photostability.

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Simple preparation of long-persistent luminescent paint with superhydrophobic anticorrosion efficiency from cellulose nanocrystals and an acrylic emulsion

Cited by 26 publications

References 40 publications

Photoluminescent and photochromic smart window from recycled polyester reinforced with cellulose nanocrystals

Photoluminescent and photochromic smart window from recycled polyester reinforced with cellulose nanocrystals

Optical properties of novel luminescent nacre‐like epoxy/graphene nanocomposite coating integrated with lanthanide‐activated aluminate nanoparticles

Preparation of photoluminescent nanocomposite ink for detection and mapping of fingermarks

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