Hydrochromic and photoswitchable polyacrylic nanofibers containing spiropyran in eco-friendly ink-free rewriteable sheets with responsivity to humidity

Karimipour, Kianoush; Rad, Jaber Keyvan; Ghomi, Amir Reza; Salehi‐Mobarakeh, Hamid; Mahdavian, Ali Reza

doi:10.1016/j.dyepig.2020.108185

Cited by 43 publications

(11 citation statements)

References 57 publications

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“…Similar dual-mode hydrochromic/fluorescent rewritable papers were developed by Tan and co-workers using diketopyrrolopyrrole dye with similar water-induced blue coloration and red fluorescence emission under UV light with poor resolution and quality of the printed patterns compared to the previous reports . Photochromic/hydrochromic nanofibers were also developed as rewritable papers using spiropyran-doped flexible poly(methyl methacrylate- co -butyl acrylate) and polar poly(methyl methacrylate- co -hydroxyethyl methacrylate) solutions. , The hydrochromic characteristics were observed for the spiropyran-containing poly(methyl methacrylate- co -hydroxyethyl methacrylate) as a result of hydrophilicity of the hydroxyl groups that led to adsorption of water and stabilized the colored MC form of spiropyran via hydrogen bonding interactions. The prepared papers displayed normal photochromism coloration and red fluorescence emission of spiropyran upon UV illumination.…”

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 93%

“…420 Photochromic/hydrochromic nanofibers were also developed as rewritable papers using spiropyran-doped flexible poly-(methyl methacrylate-co-butyl acrylate) and polar poly(methyl methacrylate-co-hydroxyethyl methacrylate) solutions. 34,421 The hydrochromic characteristics were observed for the spiropyran-containing poly(methyl methacrylate-co-hydroxyethyl methacrylate) as a result of hydrophilicity of the hydroxyl groups that led to adsorption of water and stabilized the colored MC form of spiropyran via hydrogen bonding interactions. The prepared papers displayed normal photochromism coloration and red fluorescence emission of spiropyran upon UV illumination.…”

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 99%

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

et al. 2020

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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.

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Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 93%

Section: Polymeric Anticounterfeiting Inksmentioning

confidence: 99%

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

et al. 2020

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“…Generally, a facile and fast switching rate by structural changes of SP to MC and vice versa during photo-isomerization could be tuned through controlling the surrounding polymer backbone nature and mobility. ,− In order to investigate the presence of SP in the polymer backbone and also the effect of BA on glass transition temperature ( T g ) of the prepared PMMA, P(MMA- co -BA), MSP, and MBSP, DSC thermograms were recorded from −50 to 180 °C (Figure ). A comparative study on T g s of PMMA and photoresponsive MSP exhibited an increase in T g from 106 to 116 °C after incorporation of SPEA into the polymer matrix.…”

Section: Resultsmentioning

confidence: 99%

Progressive Readout Platform Based on Photoswitchable Polyacrylic Nanofibers Containing Spiropyran in Photopatterning with Instant Responsivity to Acid–Base Vapors

et al. 2020

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Covalent bonding of photochromic molecules to a polymer matrix, flexibility of the polymeric host, and also its nanofibrous state are appropriate conditions to enhance the switching rate, photofatigue resistance, sensitivity, and long-term performance of these photo-active groups. Herein, photoresponsive polymethyl methacrylate and poly(methyl methacrylate-cobutyl acrylate) chemically modified with spiropyran (MSP and MBSP, respectively) were prepared through emulsion polymerization. To improve photosensitivity and reduce response time, the corresponding nanofibers (MSP@NF and MBSP@NF) were prepared by an electrospinning technique. Smooth and beadless morphology, high porosity (above 85%), and uniform diameter size distribution of MSP@NF (169 ± 39 nm) and MBSP@NF (203 ± 47 nm) were identified. Time-dependent UV−vis spectra and photo-isomerization kinetics revealed that flexible MBSP@NF has remarkable enhancement in the SP to merocyanine isomerization rate (19 folds) relative to the corresponding film. Reversible responsivity to HCl and ammonia vapors showed a dramatic color change and maximum absorption peak displacement for nanofiber samples immediately, together with fluorescence switching "on" and "off", while this took about 10 min for the MBSP@F sample. This was attributed to the high surface area and porous structure of these nanofibers, providing enhanced diffusion and interaction with the photo-active groups. Reversible optical write−erase cycles with improved response time and color intensity approved photopatterning capability of MBSP@NF. Enhanced photochemical, photostability, and photofatigue resistance of MBSP@NF within 10 cycles of alternating exposure to HCl−ammonia vapors and also UV−vis irradiations revealed the potentiality of such nanofibers in visual reversible photopatterning and optochemical acidochromic and ammonia-chromic portable probes.

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“…Polymeric materials with porous structures have been applied for supporting and dispersing photoswitches, such as sponges, 93 nanofibers 94 and liquid crystal networks. 95 These integrated materials have multiple application scenarios, including oil-water separation, 93 heavy metal removal 96 and wearable UV sensors.…”

Section: Extrinsic Methods: Materials With Porous Structurementioning

confidence: 99%

Toward real-world applications: promoting fast and efficient photoswitching in the solid state

Sun

Wang

2022

J. Mater. Chem. C

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Hydrochromic and photoswitchable polyacrylic nanofibers containing spiropyran in eco-friendly ink-free rewriteable sheets with responsivity to humidity

Cited by 43 publications

References 57 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

Progressive Readout Platform Based on Photoswitchable Polyacrylic Nanofibers Containing Spiropyran in Photopatterning with Instant Responsivity to Acid–Base Vapors

Toward real-world applications: promoting fast and efficient photoswitching in the solid state

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