Encryption and optical authentication of confidential cellulosic papers by ecofriendly multi-color photoluminescent inks

Abdollahi, Amin; Roghani‐Mamaqani, Hossein; Salami‐Kalajahi, Mehdi; Razavi, Bahareh; Sahandi-Zangabad, Keyvan

doi:10.1016/j.carbpol.2020.116507

Cited by 51 publications

(38 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, this group reported eco-friendly water-based anticounterfeiting inks using two spiropyran derivatives that were incorporated into functional polymer nanoparticles bearing amine, carboxylic acid, amide, hydroxyl, and epoxide groups by a physical postpolymerization modification method. 396 The results indicated a significant dependency of the photochromism and fluorescence emission on the polarity of surface functional groups. In addition, the photoresponsive polymer nanoparticles displayed high stability on the cellulosic paper surface.…”

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 94%

“…The photoresponsive latex nanoparticles were used as anticounterfeiting inks for security marking and information encryption on banknotes and passports, where the printed patterns have dual-mode authentication based on photochromism and fluorescence emission. Recently, this group reported eco-friendly water-based anticounterfeiting inks using two spiropyran derivatives that were incorporated into functional polymer nanoparticles bearing amine, carboxylic acid, amide, hydroxyl, and epoxide groups by a physical postpolymerization modification method . The results indicated a significant dependency of the photochromism and fluorescence emission on the polarity of surface functional groups.…”

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 99%

“…The presence of polar functional groups on the surface of particles significantly improved the stability of the polymer nanoparticles on the paper surface after printing. On the other hand, invisible blue emission anticounterfeiting inks based on similar polymer nanoparticles modified with coumarin were reported by this group, where the printed security marks displayed blue fluorescence emission under UV irradiation with wavelength of 365 nm …”

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 99%

“…On the other hand, invisible blue emission anticounterfeiting inks based on similar polymer nanoparticles modified with coumarin were reported by this group, where the printed security marks displayed blue fluorescence emission under UV irradiation with wavelength of 365 nm. 396 In summary, the most efficient method for preparation of fluorescent anticounterfeiting inks is using conjugated polymers in emulsion or miniemulsion polymerization and modification of polymer nanoparticles with functional fluorophores via a postpolymerization modification method. The indicated methodologies offer eco-friendly water-based polymeric anticounterfeiting inks with highly intense fluorescence emission under UV light irradiation, which induces fast authentication of originality in security documents.…”

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 99%

See 3 more Smart Citations

Photoluminescent and Chromic Nanomaterials for Anticounterfeiting Technologies: Recent Advances and Future Challenges

et al. 2020

Self Cite

View full text Add to dashboard Cite

Counterfeiting and inverse engineering of security and confidential documents, such as banknotes, passports, national cards, certificates, and valuable products, has significantly been increased, which is a major challenge for governments, companies, and customers. From recent global reports published in 2017, the counterfeiting market was evaluated to be $107.26 billion in 2016 and forecasted to reach $206.57 billion by 2021 at a compound annual growth rate of 14.0%. Development of anticounterfeiting and authentication technologies with multilevel securities is a powerful solution to overcome this challenge. Stimuli-chromic (photochromic, hydrochromic, and thermochromic) and photoluminescent (fluorescent and phosphorescent) compounds are the most significant and applicable materials for development of complex anticounterfeiting inks with a high-security level and fast authentication. Highly efficient anticounterfeiting and authentication technologies have been developed to reach high security and efficiency. Applicable materials for anticounterfeiting applications are generally based on photochromic and photoluminescent compounds, for which hydrochromic and thermochromic materials have extensively been used in recent decades. A wide range of materials, such as organic and inorganic metal complexes, polymer nanoparticles, quantum dots, polymer dots, carbon dots, upconverting nanoparticles, and supramolecular structures, could display all of these phenomena depending on their physical and chemical characteristics. The polymeric anticounterfeiting inks have recently received significant attention because of their high stability for printing on confidential documents. In addition, the printing technologies including hand-writing, stamping, inkjet printing, screen printing, and anticounterfeiting labels are discussed for introduction of the most efficient methods for application of different anticounterfeiting inks. This review would help scientists to design and develop the most applicable encryption, authentication, and anticounterfeiting technologies with high security, fast detection, and potential applications in security marking and information encryption on various substrates.

show abstract

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 94%

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 99%

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 99%

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 99%

See 2 more Smart Citations

Photoluminescent and Chromic Nanomaterials for Anticounterfeiting Technologies: Recent Advances and Future Challenges

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…[ 21,22 ] The second inspection step applies instruments, such as magnifiers, ultraviolet (UV) source, barcode reader and luminescent dyes. [ 23–26 ] The third inspection step examines the document complicated properties utilizing sophisticated instruments, such as electron microscopes, infrared spectroscopy and spectrometers, which have been used in forensic laboratories. [ 27,28 ] Documents can be secured by embedding an indicator material within the paper material, in the printed artwork or fixed into the paper document.…”

Section: Introductionmentioning

confidence: 99%

Production of photochromic nanocomposite film via spray‐coating of rare‐earth strontium aluminate for anti‐counterfeit applications

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Photoresponsive Polymers

Roghani‐Mamaqani

Tajmoradi

2022

Smart Stimuli‐Responsive Polymers, Films, and Gels

View full text Add to dashboard Cite

Encryption and optical authentication of confidential cellulosic papers by ecofriendly multi-color photoluminescent inks

Cited by 51 publications

References 63 publications

Photoluminescent and Chromic Nanomaterials for Anticounterfeiting Technologies: Recent Advances and Future Challenges

Photoluminescent and Chromic Nanomaterials for Anticounterfeiting Technologies: Recent Advances and Future Challenges

Production of photochromic nanocomposite film via spray‐coating of rare‐earth strontium aluminate for anti‐counterfeit applications

Photoresponsive Polymers

Contact Info

Product

Resources

About