基于PDLC的电控-荧光-长余辉多维度防伪薄膜的构建

doi:10.6023/A26070232

摘要/Abstract

针对传统聚合物分散液晶（Polymer-dispersed liquid crystals, PDLC）防伪模式单一、暗场不可视、对比度（Contrast ratio, CR）低等缺陷,本文构建兼具电控调光、多色发光与长余辉性能的多模态 PDLC 防伪薄膜。通过优化单体配比与液晶含量,制备出综合性能优异的PDLC薄膜。在此基础上,分别引入红色荧光粉R-FL与长余辉绿光粉G-PH,系统研究掺杂量对PDLC微观形貌、电光性能及发光特性的影响,确定2% R-FL与2.5% G-PH为最佳掺杂比例,使CR分别提升至192.79和243.94。器件在紫外光激发下分别呈现658 nm红光与506 nm绿光发射,且G-PH体系具备长余辉特性。结合丝网印刷可制备明场、紫外激发、暗场余辉三态可切换的动态防伪图案。本工作构筑的多响应 PDLC 体系大幅提升防伪安全等级与显示对比度,为高安全信息加密器件提供可行制备方案。

关键词: 聚合物分散液晶, 光致发光, 长余辉, 动态光学防伪, 多重响应

Aiming at the drawbacks of traditional polymer-dispersed liquid crystals (PDLC), such as single anti-counterfeiting mode, invisibility in dark-field conditions and low contrast ratio (CR), a multimodal PDLC anti-counterfeiting film integrating electrically controlled dimming, multicolor luminescence and long-afterglow properties was constructed in this work. PDLC films with excellent comprehensive performance were fabricated by optimizing the monomer ratio and liquid-crystal content. On this basis, red fluorescent powder R-FL and long-afterglow green phosphor G-PH were introduced separately. The effects of doping concentration on the micromorphology, electro-optical properties and luminescence behaviors of PDLC were systematically investigated. The optimal doping ratios were determined to be 2 wt% for R-FL and 2.5 wt% for G-PH, by which the CR values were increased to 192.79 and 243.94, respectively. Under ultraviolet excitation, the devices exhibited red emission at 658 nm and green emission at 506 nm, and the G-PH-doped system possessed long-afterglow characteristics. Combined with screen-printing technology, dynamic anti-counterfeiting patterns that can be switched among bright-field, UV-excited and dark-field afterglow states were fabricated. The multi-responsive PDLC system constructed in this study greatly improves anti-counterfeiting security level and display contrast, and provides a feasible fabrication strategy for high-security information-encryption devices.

Key words: Polymer dispersed liquid crystals, Photoluminescence, long afterglow, Dynamic Optical Anti-counterfeiting, multiple responses

引用此文

姚新琳, 高延龙, 陆银夫, 王冬. 基于PDLC的电控-荧光-长余辉多维度防伪薄膜的构建[J]. 化学学报, doi: 10.6023/A26070232.

Yao Xinlin, Gao Yanlong, Lu Yinfu, Wang Dong. Fabrication of PDLC-based Multidimensional Anti-Counterfeiting Films with Electric-Responsive, Fluorescent and Long-Persistent Luminescence Properties[J]. Acta Chimica Sinica, doi: 10.6023/A26070232.

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参考文献

[1] Yang D. L.; Lu Y. F.; Chen X.; Wang X.; Cao H.; Yang Z.; He W. L.; Miao Z. C.; Luan Y.; Du X.; Wang D.Chem. Eng. J. 2025, 513, 162833.
[2] Zhang L. N.; Zou C.; Gao Y. Z.; Yu M. N.; Yang H.Part Appl. Sci. Manuf. 2025, 195, 108980.
[3] Sun N.; Zhang Z. W.; Yang H.Molecules. 2025, 30(11), 2284.
[4] Lu Y. F.; Yang D. L.; Gao H.; Du X.; Zhao Y. Z.; Wang D.; He Z. M.; Miao Z. C.; Cao H.; Yang Z.; He W. L.; Li Y.Chem. Eng. J. 2024, 485, 149654.
[5] Zhang X.; Tang Y.; Ma Y.; Bisoyi H. K.; Li T.; Li Q.Adv. Funct. Mater., 2025, 35(32): 2425752.
[6] Agarwal S.; Srivastava S.; Joshi S.; Tripathi S.; Singh B. P.; Pandey K. K.; Manohar R.ACS Mater. Au, 2025, 5(1): 88-114.
[7] Chen G.; Hu J. M.; Xu J. J.; Sun J.; Xiao J. M.; Zhang L. Y.; Wang X.; Hu W.; Yang H.Macromol. Mater. Eng., 2022, 307(8), 2100991.
[8] Yang D. L.; Zhao Y. Z.; Du X.; Lu Y. F.; Zhang X. D.; Qin J. C.; Yin Y.; Zhong Z. L.; Wang D.; Yang Z.; He W. L.; Cao H.Adv. Funct. Mater. 2026, 36(16), e19620.
[9] Liu Q.; Li A.; Li K. X.; Zhao Z. Y.; Xue L. L.; Deng X.; Yuan R. X.; Fang W.; Li R.; Song Y. L.; Li H.Adv. Mater. 2025, 37(13), 2413819.
[10] Zhao M. Z.; Hu Z. Y.; Tao Y. H.; Zhou Z. X.; He L. J.; Tian Z. N.; Liu X. Q.; Chen Q. D.; Tsai D. P.Light Sci. Appl. 2026, 15(1), 118.
[11] Kim I.; Kim W. S.; Kim K.; Ansari M. A.; Mehmood M. Q.; Badloe T.; Kim Y.; Gwak J.; Lee H.; Kim Y. K.; Rho J. Sci. Adv.,2021. 7(15), eabe9943.
[12] Wang H. K.; Sheng W. H.; Zhang S. K.; Wang G. Q.; Zhang Y. J.Molecules. 2026, 31(9), 1402.
[13] Chen X.; Yin Y.; Liu W. S.; Yang D. L.; Yang Z.; Cao H.; He W. L.; Zhao Y. Z.; Lu Y. F.; Wang, D. J. Mater. Chem. C.2026, 10.1039. D6TC00681G.
[14] Feng C.; Wei J.; Liu J.; Duan W.; Du X.; Jiang H.; Xu F.; Wang Z.; Ma Y.; Li B.; Lu Y.; Zhao Q.Adv. Mater., 2026, 38(35): e73466.
[15] Yaroshchuk O.; Elouali F.; Maschke U.Opt. Mater. 2010, 32(9), 982-989.
[16] Li R. J.; Li K. X.; Deng X.; Jiang C. Z.; Li A.; Xue L. L.; Yuan R. X.; Liu Q.; Zhang Z. B.; Li H. Z.; Song Y. L.Adv. Funct. Mater. 2024, 34(42), 2404706.
[17] Ouyang C.; Chen Q. M.; Zhang D. W.; Xie Z. Y.; Luo D.; Lu, Y. Q. Hu, W.Light Sci. Appl. 2026, 15(1), 266.
[18] Pan Y. Z.;Yin W. J.; Zhang, Y. X. Acta Chim. Sinica 2025, 83(6), 639-654.
(潘禹州, 殷炜杰, 张雨霞, 化学学报, 2025, 83(6), 639-654.)
[19] Qiu T. K.; Wang X.; Zhao Y. Z.; Zhang Y.; He Z.; Luan Y.; Cao H.; Yang Z.; He W. L.; Wang D.Appl. Mater. Today. 2025, 42, 102612.
[20] Wang S.; Zhang X. D.; Chen X.; Yang D. L.; Zhong Z. L.; Zhao Y.; Wang D.; He Z. M.; Miao Z. C.; Luan Y.ACS Appl. Mater. Interfaces. 2025, 17(15), 23003-23017.
[21] Qin J. C.; Yao X. L.; Wang S. Q.; Lu Y. F.; Yang D. L.; Zhong Z. L.; Hu S. F.; Yang Z.; Cao H.; He W. L.; Zhao Y. Z.; Wang D. ACS Appl. Mater.Interfaces. 2026, 18, 23648.
[22] Chen X.; Yin Y.; Liu W. S.; Yang D. L.; Yang Z.; He W. L.; Zhao Y. Z.; Cao H.; Lu Y. F.; Wang D. J. Mater. Chem. C. 2026, DOI: 10.1039/d6tc00681g.
[23] Sun N.; Zhang Z. W.; Yang H.Molecules. 2025, 30(11), 2284.
[24] Zhao C. H.;Hu Y. C.; Xu, J. J.; Yu, M. N.; Zou, C.; Wang Q.; Gao Y. Z.; Yang, H.Crystals. 2023, 13(5), 735
[25] Pereira T. P.; Canisares F. S.M.; de Araujo-Neto, J. H.; Ellena, J.; Rodrigues, L. C. V.; Brito, H. F.; Bispo-Jr, A. G. [J].Mater. Chem. C. 2025, 13, 19788.
[26] Zhang J. Y.; Zhang S. N.; Liu J. L.; Ren Y. X.; Chen J. J.; Hu W.; Yang H.Chem. Eng. J. 2025, 505, 159583.
[27] Yaroshchuk O. V.; Dolgov L. O. Opt. Mater. 2007, 29, 1097.
[28] Jha P.; Khare A. J.Alloys Compd. 2020, 847, 156428.
[29] Sang X.; Khan A.; Xu R.; Zhang K.; Tian Y.; Li Y.; Feng M.; Liu L.; Song F.; Huang W. Adv. Opt. Mater. 2024, 12(18), 2400064.