Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia.
Textile Research Division, National Research Center (Affiliation ID: 60014618), Dokki, Cairo, Egypt.
Luminescence. 2021 Dec;36(8):1922-1932. doi: 10.1002/bio.4126. Epub 2021 Aug 9.
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; SrAl O :Eu ,Dy ) 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.
具有多功能特性的透明木材最近作为一种高效建筑产品引起了更多关注。在这里，我们描述了具有长余辉、坚韧表面、高耐久性、光稳定性和耐疲劳性、耐紫外线、超疏水性和阻燃活性的透明木材的开发。这种长余辉或自发光的智能木材能够持续长时间发光。通过将木质素调节的木材本体与甲基丙烯酸甲酯（MMA）、多聚磷酸铵（APP）和掺镧的铝酸锶（LSA；SrAl O :Eu ，Dy ）荧光粉纳米粒子的混合物进行固定化，制备出了具有光致发光的半透明木基材料。光致发光透明木材在紫外（UV）光下从无色变为亮白色，在黑暗中呈现出黄绿色，这是根据国际照明委员会（Commission Internationale de l'Éclairage）实验室比色空间坐标报告的。所生成的磷光木质基材料在 365nm 处显示出吸收带，在 516nm 处显示出发射带。磷光透明木材具有更好的阻燃性能、耐紫外线性能和超疏水性，以及对 UV 光的可逆长余辉响应，而不会产生疲劳。目前的方法为一系列应用提供了一种具有多功能透明木基材料的大规模生产策略，例如智能窗户、柔和的室内外照明以及建筑物中的安全方向标志。
