Al-Qahtani Salhah D, Alshareef Mubark, Aljohani Meshari, Alhasani Mona, Felaly Rasha, Habeebullah Turki M, El-Metwaly Nashwa M
Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
Department of Chemistry, Faculty of Applied Science, Umm Al Qura University, Makkah 21955, Saudi Arabia.
ACS Omega. 2022 Mar 17;7(12):10599-10607. doi: 10.1021/acsomega.2c00149. eCollection 2022 Mar 29.
A simple inorganic/organic nanocomposite was used to generate long-lasting phosphorescent pebbles for easy commercial manufacturing of smart products. An organic/inorganic nanocomposite was made from low-molecular-weight unsaturated polyester and rare-earth-activated strontium aluminum oxide nanoparticles doped with europium and dysprosium. The polyester resin was mixed with phosphorescent strontium aluminate oxide nanoparticles and methylethyl ketone peroxide as a cross-linking agent to create a viscous mixture that can be hardened in a few minutes at room temperature. Before adding the hardener catalyst, the phosphorescent strontium aluminate nanoparticles were dispersed throughout the polyester resin in a homogeneous manner to ensure that the pigment did not accumulate. Long-lasting, reversible luminescence was shown by the photoluminescent substrates. The emission was reported at 515 nm upon exciting the pebble at 365 nm. In normal visible light, both blank and luminescent pebbles had a translucent appearance. As a result of UV irradiation, the photoluminescent pebbles produced an intense green color. The three-dimensional CIE Lab (International Commission on Illumination) color coordinates and luminescence spectra were used to investigate the color changing characteristics. Photophysical characteristics, including excitation, emission, and lifetime, were also investigated. Scanning electron microscopy, wavelength-dispersive X-ray fluorescence spectroscopy, and energy-dispersive X-ray analysis were employed to report the surface morphologies and elemental content. Without impairing the pebbles' original physico-mechanical characteristics, the pebbles showed improved superhydrophobic activity. The current simple colorless long-lasting phosphorescent nanocomposite can be applied to a variety of surfaces, like ceramics, glassware, tiles, and metals.
一种简单的无机/有机纳米复合材料被用于制造持久发光的鹅卵石，以便于智能产品的商业化生产。有机/无机纳米复合材料由低分子量不饱和聚酯与掺杂有铕和镝的稀土激活的锶铝氧化物纳米颗粒制成。将聚酯树脂与磷光锶铝氧化物纳米颗粒以及作为交联剂的过氧化甲乙酮混合，形成一种粘性混合物，该混合物在室温下几分钟内即可硬化。在添加硬化剂催化剂之前，磷光锶铝纳米颗粒以均匀的方式分散在整个聚酯树脂中，以确保颜料不会积聚。光致发光基材表现出持久的、可逆的发光。在365nm激发鹅卵石时，发射波长报告为515nm。在正常可见光下，空白鹅卵石和发光鹅卵石均呈现半透明外观。由于紫外线照射，光致发光鹅卵石产生强烈的绿色。使用三维CIE Lab（国际照明委员会）颜色坐标和发光光谱来研究颜色变化特性。还研究了包括激发、发射和寿命在内的光物理特性。采用扫描电子显微镜、波长色散X射线荧光光谱和能量色散X射线分析来报告表面形态和元素含量。在不损害鹅卵石原始物理机械特性的情况下，鹅卵石表现出改善的超疏水活性。当前这种简单的无色持久发光纳米复合材料可应用于各种表面，如陶瓷、玻璃器皿、瓷砖和金属。
