Detection and imaging of thermochromic ink compounds in erasable pens using desorption electrospray ionization mass spectrometry

Khatami, Amin; Prova, Shamina Saiyara; Bagga, Aafreen K.; Ting, Michelle Yan Chi; Brar, G.S.; Ifa, Demian R.

doi:10.1002/rcm.7867

Cited by 17 publications

(9 citation statements)

References 19 publications

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“…Temperature-sensitive reversible systems of thermochromic microcapsules can be divided into organic reversible [3], inorganic reversible, [4] and liquid crystal reversible categories [5]. Solvents in a thermochromic system determine the thermochromic temperature of temperature-sensitive materials [6,7]. The thermosensitive discoloration temperature is generally changed by changing the solvent used [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings

2019

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Wood surface decoration and protection has become a topic of public concern. In this paper, a temperature-sensitive and reversible thermochromic waterborne wood coating was prepared by using Chinese fir board as the base material and a waterborne wood coating with the pigment slurry of thermochromic microcapsules as the paint base. The optical properties, mechanical properties and chemical resistance of the waterborne wood coating were tested, and its microstructure was analyzed. The results showed that when the concentration of thermochromic pigment slurry was 30.0%, the thermochromic property of the waterborne wood coating was best. The gloss of the waterborne wood coating with 15.0% pigment slurry of thermochromic microcapsules was high. The concentration of thermochromic pigment slurry had no effect on the adhesion, impact resistance, or chemical resistance of the waterborne wood coating. Based on the above results, the waterborne wood coating on Chinese fir had the best comprehensive performance when the concentration of thermochromic pigment slurry was 15.0%. This work will provide a technical reference for the industrialization of the thermochromic coating film on wood.

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Section: Introductionmentioning

confidence: 99%

Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings

2019

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“…(B.a‐c) Each panel includes an optical image of the imprint followed by C11H19O5N at m/z 245, C17H28O6N2 at m/z 356, and C22H33O5N2 at m/z 405, respectively. [(A) and (B) reproduced from Correa et al and Khatami et al, respectively]…”

Section: Recent Applications In Ambient Ms Imagingmentioning

confidence: 99%

“…The most recent forensic study uses DESI‐MS imaging for the analysis of thermochromic ink from erasable pens written on paper. The chemical composition of the ink in the visible, invisible and reappeared visible states was probed by heating and cooling cycles . Specific ink markers were visualized in ion images only in the invisible or reappeared state and so the presence or absence of these compounds can elucidate forged documentation (Figure B).…”

Section: Recent Applications In Ambient Ms Imagingmentioning

confidence: 99%

“…The chemical composition of the ink in the visible, invisible and reappeared visible states was probed by heating and cooling cycles. 147 Specific ink markers were visualized in ion images only in the invisible or reappeared state and so the presence or absence of these compounds can elucidate forged documentation ( Figure 9B). In summary, imaging by ambient MS techniques continues to provide reliable discrimination for forensic purposes.…”

Section: Forensic Analysismentioning

confidence: 99%

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Review and perspectives on the applications of mass spectrometry imaging under ambient conditions

Pérez

Bagga

Prova

et al. 2018

Rapid Comm Mass Spectrometry

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Ambient mass spectrometry (AMS)-based techniques are performed under ambient conditions in which the ionization and desorption occur in the open environment allowing the direct analysis of molecules with minimal or no sample preparation. A selected group of AMS techniques demonstrate imaging capabilities that can provide information about the localization of molecules on complex sample surfaces such as biological tissues. 2D, 3D, and multimodal imaging have unlocked an array of applications to systematically address complex problems in many areas of research such as drug monitoring, natural products, forensics, and cancer diagnostics. In the present review, we summarize recent advances in the field with respect to the implementation of new ambient ionization techniques and current applications in the last 5 years. In more detail, we mainly focus on imaging applications in topics related to animal whole bodies and tissues, single cells, cancer diagnostics and biomarkers, microbial cultures and co-cultures, plant and natural product metabolomics, and forensic applications. Finally, we discuss new areas of research, future perspectives, and the overall direction that the field may take in the years to come.

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“…The reversible temperature-changing thermochromic ink has the advantages of convenient detection, fast, accurate, and no need for additional auxiliary equipment, and has broad application prospects in intelligent printing [2]. Organic reversible temperature-changing thermochromic materials have remarkable characteristics in terms of colour change temperature, thermochromic colour combination, colour contrast before and after discoloration, etc., and are the most promising reversible temperaturechanging thermochromic materials [3,4]. The organic reversible thermochromic material is mainly composed of a coloring agent, a colour developing agent and a solvent.…”

Section: Introductionmentioning

confidence: 99%

Effect of Concentration of Thermochromic Ink on Performance of Waterborne Finish Films for the Surface of Cunninghamia Lanceolata

2020

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Using Cunninghamia lanceolata as a substrate, the thermochromic ink was added to the waterborne finish to test the optical properties and mechanical properties of the finish film. The results showed that the discoloration performance of the finish film with 15.0% and 30.0% of the thermochromic ink was better. The gloss of the finish film changes irregularly when the concentration increases. The finish film with a thermochromic ink concentration of 10.0% has the highest gloss, and with a concentration of 30.0% has the lowest gloss. When the thermochromic ink concentration exceeds 15.0%, the impact resistance of the finish film is slightly enhanced. The concentration is not related to the liquid resistance of the finish film. When the thermochromic ink concentration was 0–15.0%, the particle distribution uniform reunion was not much. The discoloration mechanism of discolored finish film can be considered to be as follows. After adding thermochromic ink, when the finish film temperature rises, it fades from red to colorless. When the temperature is lowered, the thermochromic ink changes to its original colour again, and the thermochromic effect is stable and sustainable. On the basis of the above results, when the thermochromic ink concentration is 15.0%, the general performance of the waterborne finish film on the Cunninghamia lanceolata surface is the best. This study provides new prospects in using thermochromic ink for waterborne finish film.

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Detection and imaging of thermochromic ink compounds in erasable pens using desorption electrospray ionization mass spectrometry

Cited by 17 publications

References 19 publications

Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings

Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings

Review and perspectives on the applications of mass spectrometry imaging under ambient conditions

Effect of Concentration of Thermochromic Ink on Performance of Waterborne Finish Films for the Surface of Cunninghamia Lanceolata

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