Photochromic properties of spiropyran in epoxy resin as anti-counterfeiting coating on flexible materials

Zhang, Ting; Fu, Liuwa; Chen, Zhikang; Cui, Yanyan; Liu, Xiaoxuan

doi:10.1016/j.porgcoat.2016.02.001

Cited by 24 publications

(16 citation statements)

References 28 publications

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“…Ultradrawn, UHMW PE films and fibers are sensitive to counterfeiting, and the above recording and fading can potentially be used for advanced anticounterfeiting features. 10 , 11 , 39 …”

Section: Resultsmentioning

confidence: 99%

Rewritable Optical Patterns in Light-Responsive Ultrahigh Molecular Weight Polyethylene

Lafleur

Severn

Verpaalen

et al. 2019

ACS Appl. Polym. Mater.

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Spiropyran is used as a photochromic dye to create colored patterns in highly drawn ultrahigh molecular weight polyethylene (UHMW PE) films. The dye is incorporated in highly crystalline, drawn UHMW PE tapes and fibers and isomerizes to its merocyanine state upon UV light irradiation, resulting in a color change from transparent to purple. The isomerization from merocyanine to spiropyran to erase the color can be simply induced by using heat or a green LED light. The combination of the use of a mask and the reversibility of the isomerization results in colored patterns that can be written, erased, and rewritten using UV light and heat or green LED light.

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“…Ultradrawn, UHMW PE films and fibers are sensitive to counterfeiting, and the above recording and fading can potentially be used for advanced anticounterfeiting features. 10 , 11 , 39 …”

Section: Resultsmentioning

confidence: 99%

Rewritable Optical Patterns in Light-Responsive Ultrahigh Molecular Weight Polyethylene

Lafleur

Severn

Verpaalen

et al. 2019

ACS Appl. Polym. Mater.

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“…1−5 Therefore, information encryption and anticounterfeiting are playing important roles in minimizing economic damage and protecting public safety. During the past few decades, varieties of technologies, including radiofrequency identification, 6 nuclear track technology, 7 and laser holograms with the capacity of availability, 8 authenticity, and traceability, have been developed as security features. 9 However, some complex and expensive manufacturing equipment is often needed in the preparation or detection of these technologies, and the stored information can be easily rewritten.…”

Section: ■ Introductionmentioning

confidence: 99%

Achieving Multimodal Emission in Zn₄B₆O₁₃:Tb³⁺,Yb³⁺ for Information Encryption and Anti-counterfeiting

Zhao

Wang

et al. 2020

Inorg. Chem.

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With the rapid development of technology, information security has always been considered a major challenge. In this work, the excellent combination of persistent luminescence, photoluminescence, up-conversion luminescence, and thermoluminescence in a particular material Zn 4 B 6 O 13 :Tb 3+ ,Yb 3+ synthesized via a solid-state reaction is reported, which can be used for the information encryption and anti-counterfeiting. Tb 3+ ions were chosen as the emitting centers for multimodal emissions, and Yb 3+ codoping can be used as electron traps and sensitizer to adjust trap distribution and efficient up-conversion luminescence in rareearth-doped luminescent materials. Besides, the as-prepared luminescent materials exhibit high thermal stability and excellent water resistance. On the basis of these properties, the samples were used to print luminescent images through a screen printing process on the film and banknote. The luminescent image in a film is showing different patterns and on a banknote is showing green emissions under different stimulations. These multimodal emissions demonstrate that the as-prepared sample is suitable for advanced information encryption and anti-counterfeiting.

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“…Spiropyran (SP) is a photosensitive molecule featuring reversible optical-switching between two forms, the colorless ring-closed SP form and the colored ring-opened merocyanine (MC) form [37]. In our group, epoxy resin is thoroughly mixed with an SP derivative to formulate anti-counterfeiting coatings that could be applied to exible substrates, such as food and medicine packaging [38]. Spiropyran (SP)-containing uorinated polyacrylate (F-PA-SP) latex is prepared by emulsion polymerization, which is potential to cellulosic paper with outstanding reversible color changes and hydrophobicity [39].…”

Section: Introductionmentioning

confidence: 99%

Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

Peng

Gao

et al. 2019

Advances in Polymer Technology

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Superhydrophobic sponge as potential absorbing material for oil/water separation is attracting great attention recently. However, there are still some challenges to feasibly fabricate superhydrophobic sponge with large scale and low cost. Herein, a novel photochromic superhydrophobic melamine sponge (PDMS-SP sponge) is fabricated by facilely dip-coating and thermocuring of hydroxyl-terminated polydimethylsiloxanes mixed with photochromic spiropyran. FT-IR, EDS, and XPS results confirm the successful coating of PDMS-SP upon melamine sponge. The resultant sponge not only possesses excellent water repellency with a contact angle of 154.5° and oil-water separation efficiency with an oil absorption capacity of 48–116 folds of itself weight, but also shows photochromic phenomenon between colorless and purple when it is successively exposed to UV irradiation and visible light.

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Photochromic properties of spiropyran in epoxy resin as anti-counterfeiting coating on flexible materials

Cited by 24 publications

References 28 publications

Rewritable Optical Patterns in Light-Responsive Ultrahigh Molecular Weight Polyethylene

Rewritable Optical Patterns in Light-Responsive Ultrahigh Molecular Weight Polyethylene

Achieving Multimodal Emission in Zn₄B₆O₁₃:Tb³⁺,Yb³⁺ for Information Encryption and Anti-counterfeiting

Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

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Photochromic properties of spiropyran in epoxy resin as anti-counterfeiting coating on flexible materials

Cited by 24 publications

References 28 publications

Rewritable Optical Patterns in Light-Responsive Ultrahigh Molecular Weight Polyethylene

Rewritable Optical Patterns in Light-Responsive Ultrahigh Molecular Weight Polyethylene

Achieving Multimodal Emission in Zn4B6O13:Tb3+,Yb3+ for Information Encryption and Anti-counterfeiting

Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

Contact Info

Product

Resources

About

Achieving Multimodal Emission in Zn₄B₆O₁₃:Tb³⁺,Yb³⁺ for Information Encryption and Anti-counterfeiting