Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia.
Luminescence. 2024 Apr;39(4):e4746. doi: 10.1002/bio.4746.
The use of photochromism to increase the credibility of consumer goods has shown great promise. To provide mechanically dependable anticounterfeiting nanofibres, it has also been critical to improve the engineering processes of authentication patterns. Mechanically robust and photoluminescent electrospun poly(ethylene oxide)/glass (PGLS) nanofibres (150-350 nm) immobilized with nanoparticles of lanthanide-doped aluminate (NLA; 8-15 nm) were developed using electrospinning technology for anticounterfeiting purposes. The provided nanofibrous membranes changed colour from transparent to green when irradiated with ultraviolet light. By delivering NLA with homogeneous distribution without aggregations, we were able to keep the nanofibrous membrane transparent. When excited at 365 nm, NLA@PGLS nanofibres showed an emission intensity at 517 nm. The hydrophobicity of NLA@PGLS nanofibres improved by raising the pigment concentration as the contact angle was increased from 146.4° to 160.3°. After being triggered by ultraviolet light, NLA@PGLS showed quick and reversible photochromism without fatigue. It was shown that the suggested method can be applied to reliably produce various anticounterfeiting materials.
利用光致变色来提高消费品的可信度已经显示出巨大的潜力。为了提供机械可靠的防伪纳米纤维，改进认证图案的工程工艺也至关重要。为了防伪目的，我们使用静电纺丝技术开发了机械强度高且发磷光的聚氧化乙烯/玻璃（PGLS）纳米纤维（150-350nm），其内部固定有掺杂镧的铝酸盐（NLA；8-15nm）纳米颗粒。当用紫外线照射时，提供的纳米纤维膜会从透明变为绿色。通过均匀分布而没有团聚地输送 NLA，我们能够保持纳米纤维膜透明。当在 365nm 处激发时，NLA@PGLS 纳米纤维在 517nm 处显示出发射强度。通过提高颜料浓度，NLA@PGLS 纳米纤维的疏水性得到提高，接触角从 146.4°增加到 160.3°。NLA@PGLS 在被紫外线触发后，无需疲劳即可快速且可逆地发生光致变色。结果表明，所提出的方法可用于可靠地生产各种防伪材料。
