New photochromic film was developed toward the preparation of anti-counterfeiting documents utilizing inorganic/organic nanocomposite enclosing a photoluminescent inorganic pigment and a polyacrylic binder polymer. To generate a translucent film from pigment/polyacrylic nanocomposite, the phosphorescent strontium aluminum oxide pigment should be well-dispersed in the solution of the polyacrylic-based binder without agglomeration. The photochromic nanocomposite was applied efficiently onto commercial cellulose paper documents utilizing the effective and economical spray-coating technology followed with thermofixation. A homogeneous photochromic film was immobilized onto cellulose paper surface to introduce a transparent film changing to greenish-yellow upon exposure to ultraviolet light as depicted by CIE coloration measurements. The photochromic effect was monitored at lowest pigment concentration (0.25 wt%). The spray-coated paper documents exhibit two absorbance bands at 256 and 358 nm, and two fluorescence peaks at 433 and 511 nm. The morphologies of the spray-coated documents were explored. The spray-coated paper sheets showed a reversible photochromic effect without fatigue under ultraviolet irradiation. The rheology of the produced photochromic composites as well as the mechanical properties and photostability of the spray-coated documents were studied.

中文翻译：

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通过喷涂稀土铝酸锶制备用于防伪应用的光致变色纳米复合膜

开发了新型光致变色薄膜，用于利用无机/有机纳米复合材料包裹光致发光无机颜料和聚丙烯酸粘合剂聚合物来制备防伪文件。为了从颜料/聚丙烯酸纳米复合材料产生半透明薄膜，磷光锶铝氧化物颜料应该很好地分散在聚丙烯酸基粘合剂的溶液中而不会结块。光致变色纳米复合材料利用有效且经济的喷涂技术，然后热固定，有效地应用于商业纤维素纸文件。将均匀的光致变色薄膜固定在纤维素纸表面上，以引入透明薄膜，如 CIE 着色测量所示，在暴露于紫外光后会变为黄绿色。在最低颜料浓度 (0.25 wt%) 下监测光致变色效果。喷涂纸文件在 256 和 358 nm 处显示两个吸收带，在 433 和 511 nm 处显示两个荧光峰。探索了喷涂文件的形态。喷涂后的纸张在紫外线照射下表现出不疲劳的可逆光致变色效应。研究了生产的光致变色复合材料的流变性以及喷涂文件的机械性能和光稳定性。喷涂后的纸张在紫外线照射下表现出不疲劳的可逆光致变色效应。研究了生产的光致变色复合材料的流变性以及喷涂文件的机械性能和光稳定性。喷涂后的纸张在紫外线照射下表现出不疲劳的可逆光致变色效应。研究了生产的光致变色复合材料的流变性以及喷涂文件的机械性能和光稳定性。