Smart photochromic and fluorescent products can respond to an external stimulus by changing their colour and emission spectra with light. Here, we developed a simple formulation of an organic–inorganic nanocomposite photoluminescent cellulose acetate (CA) film based on immobilization of a lanthanide‐doped pigment. Strontium aluminium oxide pigment doped with Eu²⁺ and Dy³⁺ (SAOED) exhibits an optimal excitation wavelength at 365 nm. For better fabrication of the multifunctional colourless pigment–cellulose acetate composites (CA–SAOED), the lanthanide‐doped colourant must be well‐dispersed physically without agglomeration. The fabricated photoluminescence cellulose film exhibited an excitation peak at 436 nm and two fluorescence peaks at 494 and 524 nm. The findings revealed that the originated nanocomposite films demonstrated improved superhydrophobic activity, high ultraviolet light protection and enhanced antibacterial activity without adversely influencing its native physico‐mechanical characteristics. The films demonstrated fast and reversible photochromic responsiveness without fatigue during ultraviolet light irradiation.

中文翻译：

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固定有掺杂镧系元素的光致变色醋酸纤维素透明纳米复合膜的简便开发：紫外线阻隔，超疏水和抗菌活性

智能光致变色和荧光产品可以通过改变其颜色和发射光谱来对外部刺激做出反应。在这里，我们基于固定化镧系元素的颜料，开发了有机-无机纳米复合光致发光醋酸纤维素（CA）膜的简单配方。Eu ²⁺和Dy ³⁺掺杂的锶铝氧化物颜料（SAOED）在365 nm处显示最佳激发波长。为了更好地制造多功能无色颜料-醋酸纤维素复合材料（CA-SAOED），掺杂镧系元素的着色剂必须在物理上良好分散，而不会发生团聚。所制备的光致发光纤维素膜在436nm处显示出激发峰，并且在494nm和524nm处显示出两个荧光峰。这些发现表明，原始的纳米复合膜表现出改善的超疏水活性，高紫外线防护性和增强的抗菌活性，而没有不利地影响其天然的物理机械特性。该膜表现出快速且可逆的光致变色响应性，在紫外线照射过程中没有疲劳。