A novel black crystalline composite based on a fluoran dye and a bisphenol S derivative for high performance thermal papers

Ōhashi, Tatsuya; Gontani, Saori; Miyanaga, Kyohei; Kurata, Takaaki; Akatani, Yoshiki; Matsumoto, Shinya

doi:10.1016/j.dyepig.2017.03.038

Cited by 14 publications

(6 citation statements)

References 6 publications

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“…The black appearance of the spirolactone derivatives was also reported in other papers. 46,47 The color switched back to black when the RTPCMs were cooled down to 15 C. The color change was reversible in multiple heatingcooling cycles. The thermochromic mechanism in microencapsulated RTPCM is given in Scheme 2.…”

Section: Preparation Of Rtpcm Microcapsulesmentioning

confidence: 99%

Microencapsulation of 1-hexadecanol as a phase change material with reversible thermochromic properties

Shi

Zhang

et al. 2017

RSC Adv.

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Herein, a novel approach for generating a microencapsulated reversible thermochromic phase change material (RTPCM) is described. The system described uses a spirolactone derivative color former, phenolic hydroxyl compound color developer, and 1-hexadecanol as the phase change material and cosolvent. The microencapsulation is achieved by complex coacervation of modified gelatin containing vinyl groups and gum arabic. This is followed by the crosslinking reaction between vinyl groups on modified gelatin and a divinyl crosslinker and subsequent crosslinking reaction with glutaraldehyde to improve stability and encapsulation efficiency. The influence of various key parameters on properties of the microcapsules (encapsulation efficiency, morphology, and particle size) are reviewed including the substitution degree of vinyl groups on modified gelatin, the type and amount of divinyl crosslinkers, and the core/shell ratio. Thermal properties and reversible color reliability of the generated microcapsules were found to be stable after 100 thermal heating and cooling cycles. Such microcapsules are well suited for latent heat storage and as an indicator for the states of energy saturation and consumption in phase change material applications directly through color change.

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Section: Preparation Of Rtpcm Microcapsulesmentioning

confidence: 99%

Microencapsulation of 1-hexadecanol as a phase change material with reversible thermochromic properties

Shi

Zhang

et al. 2017

RSC Adv.

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“…As thermal papers provide a simple and fast printing process, as well as excellent recording properties, they are quite widely used for printing in various fields, such as POS receipts, package labels, travel passes, concert tickets, barcodes for medical use, and information encryption. − Additionally, it is expected that the scale of such thermal papers’ market will reach up to 6 billion dollars globally by 2027 . In order to record information on thermal papers coated with leuco-type thermal dyes, a reaction must occur where developer materials deposited on the paper substrate provide protons at a certain printing temperature to open the lactone ring of the leuco molecules (Figure a). − In general, bisphenol A (4,4′-(propane-2,2-diyl)diphenol (BPA)) is most commonly used as a developer substance for thermal papers because of its excellent development quality and affordability. , However, as BPA is a known endocrine disruptor, it causes various toxicities to the human body and the environment. − Furthermore, there have been progressive reports stating that BPA can be absorbed through the skin into the body even upon making a simple contact with thermal papers. − Thus, the EPA in the United States has warned about using BPA on thermal paper, as well as has conducted an investigation in search of an alternative substance . In particular, the EU has regulated the use of BPA on thermal paper to be less than 0.02% (w/w) since 2020…”

Section: Introductionmentioning

confidence: 99%

Phenolic Polymer-Based Color Developers for Thermal Papers: Synthesis, Characterization, and Applications

Yun

Kang

2021

Ind. Eng. Chem. Res.

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The demand for urgently replacing the problematic 4,4′-(propane-2,2-diyl)diphenol (BPA) color developer in thermal papers is increasing recently. In order to develop alternative color developer materials to BPA, novolac-type polymeric developer materials that not only exhibit excellent color-developing performance but also are difficult to be absorbed by the human skin were introduced. The target novolac polymers, BPAEP-FN, were synthesized by copolymerizing BPA and 4-ethylphenol monomer with various ratios. Among the prepared BPAEP-FN polymers, the BPAEP-FN_64 polymer showed highly improved static sensitivity as compared to a simple BPA-novolac polymer that contained no 4-ethylphenol at all. Moreover, it is possible to effectively adjust the static sensitivity of BPAEP-FN_64 thermal papers by using sensitizers such as diphenyl sulfone and 4-benzylbiphenyl and we are able to obtain static sensitivity similar to that of BPA thermal papers. In particular, BPAEP-FN_64 thermal papers showed superior durability to BPA thermal papers under harsh thermal conditions of the external environment.

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“…Organic dyes have been widely employed in the areas of textiles, inks, clothinga nd plastics recently acting as ab asic industrial material. [28][29][30] Unfortunately,t heir temperature-stable naturet ogether with high toxicity makes them to be one of the major environmental pollutants. Untiln ow,m any efforts have been made on the removal of dye pollutantst hat have been thrown to nature with al arge amount.…”

Section: Introductionmentioning

confidence: 99%

“…Organic dyes have been widely employed in the areas of textiles, inks, clothing and plastics recently acting as a basic industrial material . Unfortunately, their temperature‐stable nature together with high toxicity makes them to be one of the major environmental pollutants.…”

Section: Introductionmentioning

confidence: 99%

A Series of Iodoargentates Directed by Solvated Metal Cations Featuring Uptake and Photocatalytic Degradation of Organic Dye Pollutants

Wei

Wang

Pan

et al. 2019

Chemistry An Asian Journal

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By using solvated metal cations as structure-directing agents, three new iodoargentates, namely,[ Fe(DMSO) 6 ] [Ag 6 I 9 ]·DMSO (1), [Fe(H 2 O) 6 ][Ag 15 I 18 ]( 2)a nd [Cd(DMSO) 6 ] [Ag 8 I 10 ]( 3)( DMSO = dimethyl sulfoxide) have been solvothermally prepared and structurallyc haracterized. The structures of compounds 1 and 2 can be described as 1D chains constructed from the linkageo f[ Ag 6 I 9 ]a nd [Ag 5 I 11 ]b uilding units, respectively.F or compound 3,t he [Ag 10 I 22 ]b uilding blocks are directly interconnected to form a2 D[ Ag 8 I 10 ]l ayer,which are furtheri nterconnected via intermolecularf orces to generate a3 Ds upramolecular framework with 1D large channels occupied by [Cd(DMSO) 6 ] 2 + cations.I nterestingly, compounds 1-3 exhibit an ion-exchange behavior for the adsorption of as pecific dye (methylene blue, MB). Moreover, photocatalytic experimentsi ndicate that these iodoargentates can be considered as promisingp hotocatalysts for the degradation of organic dyep ollutants.[a] Dr.

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A novel black crystalline composite based on a fluoran dye and a bisphenol S derivative for high performance thermal papers

Cited by 14 publications

References 6 publications

Microencapsulation of 1-hexadecanol as a phase change material with reversible thermochromic properties

Microencapsulation of 1-hexadecanol as a phase change material with reversible thermochromic properties

Phenolic Polymer-Based Color Developers for Thermal Papers: Synthesis, Characterization, and Applications

A Series of Iodoargentates Directed by Solvated Metal Cations Featuring Uptake and Photocatalytic Degradation of Organic Dye Pollutants

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