Structural comparison of two bisphenol S derivatives used as colour developers in high-performance thermal paper

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

doi:10.1016/j.dyepig.2016.12.049

Cited by 12 publications

(3 citation statements)

References 11 publications

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“…33 Moreover, the presence of the sulfur compound in S-BEA also leads to the development of strong color. 34 Furthermore, the transmittance in the UV cured specimens increases with the rise in the concentration of reactive diluents. It was mainly due to the increase in can be visually compared to the prepared UV cured specimens shown in Figure 7.…”

Section: Transmittance Analysismentioning

confidence: 99%

Synthesis of ultraviolet curable bisphenol‐based epoxy acrylates and comparative study on its physico‐chemical properties

Desai

Jagtap

2021

J of Applied Polymer Sci

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Photocuring resins have emerged as cutting-edge technology in coatings, adhesives, composites, additive manufacturing, and so forth. In the present work, different bisphenol, namely A, F, and S, were used to synthesize low molecular weight epoxy resin, which was further reacted with acrylic acid monomer to form bisphenol-based epoxy acrylate (BEA). The BEA resins were formulated using reactive diluents, trimethylolpropane triacrylate, and hexanediol diacrylate in the ratio of 0-40 wt% at the increment of 10 wt% alongside a fixed quantity photoinitiator. These resins were then cast into dumbbell-shaped specimens by irradiating them under ultraviolet (UV) light. The structural elucidation of BEA resins was performed using Fourier transform infrared, nuclear magnetic resonance, and UV-Vis spectroscopy. The formulated resins were also studied for their rheological properties. Further, the UV cured specimens were evaluated for mechanical, thermal, contact angle, and extent of curing. These outcomes were utilized for establishing the structure-property relationship based on the functionality, reactivity, and molecular structure of synthesized BEA resins, which controllers the design architecture and crosslinking density of UV-cured specimens.

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Section: Transmittance Analysismentioning

confidence: 99%

Synthesis of ultraviolet curable bisphenol‐based epoxy acrylates and comparative study on its physico‐chemical properties

Desai

Jagtap

2021

J of Applied Polymer Sci

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“…Heat as one of the most common stimuli has also attracted increasing attention for fundamental research and practical application. Thermally regulated luminescence or color switching has occupied a significant status in the field. , Apart from the frequently used strategy of thermal modulation of the stacking mode of organic solid-state materials, temperature-gated proton transfer reactions are also a desirable strategy for regulating color and have been widely applied in thermosensitive paper . In addition to color change, switching of molecular luminescence based on heat-stimulated proton transfer is another engrossing field.…”

Section: Heat-stimulated Proton Transfer and Its Application In Therm...mentioning

confidence: 99%

Stimuli-Induced Reversible Proton Transfer for Stimuli-Responsive Materials and Devices

2021

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Conspectus Stimuli-responsive materials have a great potential in various novel photoelectric devices, such as self-adaptive adjustment devices, intelligent detection, molecular computers with information storage capability, camouflage and anticounterfeiting display, various energy-saving displays, and others. However, progress in related areas has been relatively slow because of the lack of high-performance smart materials and the limitations of available reaction mechanisms currently. To address these problems fundamentally, new mechanisms need to be designed and developed, and learning from nature is an effective and intelligent method to achieve this long-awaited target, such as mimicking of proton transfer processes in nature at the molecular/supramolecular level. The stimuli-induced reversible proton transfer system is composed of materials that release or capture protons in response to stimuli and switch molecules that control color and/or fluorescence modulation by protons, and it is applied in stimuli-responsive materials and devices, including bistable electronic/electrochromic devices, electrofluorochromic devices, water-jet rewritable paper, visible-light-responsive rewritable paper, and mechanochromic materials. To help researchers gain deep insight into stimuli-induced reversible proton transfer, we attempted to summarize its reaction mechanism and design principle, and discuss strategies to design and prepare various related stimuli-responsive materials and devices. This Account discusses the different systems in which a color/fluorescence change is induced by the proton transfer process under various stimuli, including electric field, water, light, heat, and stress. Relative very promising applications as well as their performance especially for energy-saving and environmentally friendly devices are then summarized, such as energy-saving bistable electrochromic devices, water-jet rewritable paper, and visible-light-responsive rewritable paper. Meanwhile, we focus on the key influence factors and useful additives for improving the device’s performance. At last, challenges and bottlenecks faced by stimuli-responsive materials and devices based on the mechanism of reversible proton transfer are proposed. Moreover, we put forward some suggestions on solving these limitations. These exciting results reveal that smart materials based on the mechanism of proton transfer are extremely attractive and possess great potential in the next generation of energy and resource saving and environmental protection display. We hope that this Account further prospers the field of intelligent stimuli-responsive discoloration materials and next-generation green displays.

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“…The so-called accuracy here is controlled by pixels. There are many kinds of color space such as RGB composed of three primary colors and HSI composed of three variables, i.e., hue, saturation, and illuminance [41,42]. To facilitate the transition of both kinds of color space, illuminance (I) is generally defined as the arithmetic mean of the three RGB components, i.e., I = ðR + G + BÞ/3 [43,44], which is also used in this paper.…”

Section: Geofluidsmentioning

confidence: 99%

Numerical Simulation on Non-Darcy Flow in a Single Rock Fracture Domain Inverted by Digital Images

et al. 2020

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The influence of rock seepage must be considered in geotechnical engineering, and understanding the fluid flow in rock fractures is of great concern in the seepage effect investigation. This study is aimed at developing a model for inversion of rock fracture domains based on digital images and further study of non-Darcy flow. The visualization model of single rock fracture domain is realized by digital images, which is further used in flow numerical simulation. We further discuss the influence of fracture domain geometry on non-Darcy flow. The results show that it is feasible to study non-Darcy flow in rock fracture domains by inversion based on digital images. In addition, as the joint roughness coefficient (JRC) increases or the fracture aperture decreases, distortion of the fluid flow path increases, and the pressure gradient loss caused by the inertial force increases. Both coefficients of the Forchheimer equation decrease with increasing fracture aperture and increase with increasing JRC. Meanwhile, the critical Reynolds number tends to decrease when JRC increases or the fracture aperture decreases, indicating that the fluid tends to non-Darcy flow. This work provides a reference for the study of non-Darcy flow through rock fractures.

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Structural comparison of two bisphenol S derivatives used as colour developers in high-performance thermal paper

Cited by 12 publications

References 11 publications

Synthesis of ultraviolet curable bisphenol‐based epoxy acrylates and comparative study on its physico‐chemical properties

Synthesis of ultraviolet curable bisphenol‐based epoxy acrylates and comparative study on its physico‐chemical properties

Stimuli-Induced Reversible Proton Transfer for Stimuli-Responsive Materials and Devices

Numerical Simulation on Non-Darcy Flow in a Single Rock Fracture Domain Inverted by Digital Images

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