Mogharbel Amal T, Alluhaybi Ahmad A, Almotairy Awatif R Z, Aljohani Meshari M, El-Metwaly Nashwa M, Zaky Rania
Department of Chemistry, Faculty of Science, University of Tabuk, Tabuk 71474, Saudi Arabia.
Department of Chemistry, College of Sciences & Arts, King Abdulaziz University, Rabigh 21589, Saudi Arabia.
ACS Omega. 2022 Dec 28;8(1):1683-1692. doi: 10.1021/acsomega.2c07554. eCollection 2023 Jan 10.
Alkaline earth aluminates (AEAs) as photoluminescent agents and silicon dioxide-based electrospun glass nanofibers with an average diameter of 150-450 nm as a roughening agent were prepared and applied to reinforce an epoxy resin toward the development of long-persistent photoluminescent and photochromic smart materials, such as smart windows and anticounterfeiting barcodes. With the physical immobilization of lanthanide-doped aluminate nanoparticles (NPs), a light-induced luminescent transparent glass@epoxy film was developed. The glass@epoxy samples were able to alter their color to green beneath ultraviolet rays and greenish-yellow in the dark, as explored by CIE Lab and luminescence spectral analyses. The morphology of the lanthanide-doped aluminate nanoparticles (43-98 nm) was examined by transmission electron microscopy (TEM). The morphologies and chemical composition of the luminescent glass@epoxy substrates were determined by different analytical techniques. The mechanical properties of the developed photoluminescent glass@epoxy substrates were inspected to show improved scratch resistance as compared to the AEA-free substrate. The photoluminescence spectra were measured to indicate the detection of two emission bands at 494 and 525 nm when excited at 365 nm. The photoluminescent glass@epoxy hybrids with lower AEA contents have showed fast reversibility of photochromism. On the other hand, the glass@epoxy substrates with higher phosphor contents underwent persistent luminescence. Results showed that the luminescent colorless glass@epoxy hybrids have enhanced superhydrophobicity and ultraviolet blocking.
制备了碱土铝酸盐（AEA）作为光致发光剂，以及平均直径为150 - 450 nm的二氧化硅基电纺玻璃纳米纤维作为粗糙化剂，并将其应用于增强环氧树脂，以开发长余辉光致发光和光致变色智能材料，如智能窗户和防伪条形码。通过镧系掺杂铝酸盐纳米颗粒（NPs）的物理固定，制备了光诱导发光透明玻璃@环氧树脂薄膜。通过CIE Lab和发光光谱分析发现，玻璃@环氧树脂样品在紫外线照射下能变为绿色，在黑暗中呈黄绿色。通过透射电子显微镜（TEM）研究了镧系掺杂铝酸盐纳米颗粒（43 - 98 nm）的形态。采用不同的分析技术确定了发光玻璃@环氧树脂基材的形态和化学成分。对所制备的光致发光玻璃@环氧树脂基材的力学性能进行检测，结果表明与不含AEA的基材相比，其耐刮性有所提高。测量光致发光光谱表明，在365 nm激发时，检测到494和525 nm处的两个发射带。AEA含量较低的光致发光玻璃@环氧树脂杂化物表现出快速的光致变色可逆性。另一方面，磷光体含量较高的玻璃@环氧树脂基材呈现长余辉发光。结果表明，发光无色玻璃@环氧树脂杂化物具有增强的超疏水性和紫外线阻隔性能。
