Abstract
Smart packaging technology employing thermochromic materials has been a major concern in food industry due to the prediction of food quality and safety and an easy use. As changing temperature, the minimal inter-color interference is a crucial factor for smart packaging applications. Here, the naked-eye discernible color switching indicators, employing encapsulated thermochromic materials, were designed to present the optimal intake temperature of watermelon. This attachable indicator was fabricated using printable ink on a paper medium. The color switching behaviors were violet (< 6 °C), red (9–11 °C), and gray (> 13 °C). To minimize the color interference, the relationship between inter-color interference and the visibility were investigated in terms of the applied ink thickness. At 20–25 µm thickness, minor color residue and clear visibility were observed. The sweetness was an important factor for the determination of watermelon taste, and the perception of sweetness increased in the temperature range of 9–11 °C. The required cooling time for watermelon temperature to be homogeneous was investigated by the heat transfer from atmosphere to watermelon. The convective heat transfer coefficient (h) and the conductive heat transfer coefficient (k) were obtained. The indicator attached on the surface of watermelon exhibited the three color switching behavior reflecting the average temperature of whole watermelon.
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B. Kuswandi, O.R. Jayus, A. Abdullah, L.Y. Heng, A novel on-package sticker sensor based on methyl red for real-time monitoring of broiler chicken cut freshness. Packag. Technol. Sci. 27(1), 69–81 (2014)
B. Kuswandi, C. Maryska, A. Jayus, L.Y. Heng, Real time on-package freshness indicator for guavas packaging. J. Food. Meas. Charact. 7(1), 29–39 (2013)
R. Simpson, S. Almonacid, H. Nunez, M. Pinto, A. Abakarov, A. Teixeira, Time-temperature indicator to monitor cold chain distribution of fresh salmon (Salmo Salar). J. Food. Process. Eng. 35(5), 742–750 (2012)
S. Zabala, J. Castan, C. Martinez, Development of a time-temperature indicator (TTI) label by rotary printing technologies. Food Control 50, 57–64 (2015)
Y.H. Kim, Y.J. Yang, J.S. Kim, D.S. Choi, S.H. Park, S.Y. Jin, J.S. Park, Non-destructive monitoring of apple ripeness using an aldehyde sensitive colorimetric sensor. Food Chem. 267, 149–156 (2018)
X.G. Hu, X. Li, S.H. Park, Y.H. Kim, S.I. Yang, Nondestructive monitoring of kiwi ripening process using colorimetric ethylene sensor. B. Korean. Chem. Soc. 37(5), 759–762 (2016)
C. Lang, T.A. Hubert, Colour ripeness indicator for apples. Food Bioprocess. Tech. 5(8), 3244–3249 (2012)
M. Inouye, K. Tsuchiya, T. Kitao, New thermo-response dyes - coloration by the claisen rearrangement and intramolecular acid-base reaction. Angew. Chem. Int. Edit. 31(2), 204–205 (1992)
D.C. MacLaren, M.A. White, Competition between dye-developer and solvent-developer interactions in a reversible thermochromic system. J. Mater. Chem. 13(7), 1701–1704 (2003)
D.C. MacLaren, M.A. White, Dye-developer interactions in the crystal violet lactone-lauryl gallate binary system: implications for thermochromism. J. Mater. Chem. 13(7), 1695–1700 (2003)
D. Galliani, L. Mascheroni, M. Sassi, R. Turrisi, R. Lorenzi, A. Scaccabarozzi, N. Stingelin, L. Beverina, Thermochromic latent-pigment-based time-temperature indicators for perishable goods. Adv. Opt. Mater. 3(9), 1164–1168 (2015)
B.G. Green, D. Nachtigal, Temperature affects human sweet taste via at least two mechanisms. Chem. Senses. 40(6), 391–399 (2015)
Y. A. Cengel, Heat Transfer, 2nd edn.(Macgraw-Hill, 2002), chapter 4
B.R. Becker, B.A. Fricke, Heat transfer coefficient for forced-air cooling and freezing of selected foods. Int. J. Refrig. 27, 540–551 (2004)
P. Perkins-Veazie, J.K. Collins, A.R. Davis, W. Roberts, Carotenoid content of 50 watermelon cultivars. J. Agric. Food. Chem. 54, 2593–2597 (2006)
A. Xisto, E. Villas Boas, E. Nunes, B. Vilas Boas, M.C. Guerreiro, Volatile profile and physical, chemical, and biochemical changes in fresh cut watermelon during storage. Food Sci. Technol. 32, 173–178 (2012)
Y. Yao, H. Chen, L. Xie, X. Rao, Assessing the temperature influence on the soluble solids content of watermelon juice as measured by visible and near-infrared spectroscopy and chemometrics. J. Food. Eng. 119, 22–27 (2013)
P. Shanmugavelan, S.Y. Kim, J.B. Kim, H.W. Kim, S.M. Cho, S.N. Kim, S.Y. Kim, Y.S. Cho, H.R. Kim, Evaluation of sugar content and composition in commonly consumed Korean vegetables, fruits, cereals, seed plants, and leaves by HPLC-ELSD. Carbohyd. Res. 380, 112–117 (2013)
L.M. Bartoshuk, K. Rennert, J. Rodin, J.C. Steven, Effects of temperature on the perceived sweetness of sucrose. Physiol. Behav. 28(5), 905–910 (1982)
L. Keri, R. James, D. Paul, Effect of Temperature on the Intensity of Basic Tastes: Sweet. Salty and Sour. J. Food Res. 5, 1–10 (2016)
N. Well, D. Yusufu, A. Mills, Colourimetric plastic film indicator for the detection of the volatile basic nitrogen compounds associated with fish spoilage. Talanta 194, 830–836 (2019)
A. A. Kader (2002) Postharvest Technology of Horticultural Crops, 3rd edn. (University of California - Agriculture and Natural Resources
H. Song, J. Kim, B.S. Kim, J. Koo, Development of a food temperature prediction model for real time food quality assessment. Int. J. Refrig. 98, 468–479 (2019)
P.S. Minz, C.S. Saini, Evaluation of RGB cube calibration framework and effect of calibration charts on color measurement of mozzarella cheese. J. Food. Meas. Charact. 13, 1537–1546 (2019)
B.H. Cho, K. Koyama, S. Koseki, Determination of ‘Haas’ avocado ripeness during storage by a smartphone camera using artificial neural network and support vector regression. J. Food. Meas. Charact. 15, 2015–2030 (2021)
K. Lee, S. Baek, D. Kim, J. Seo, A freshness indicator for monitoring chicken-breast spoilage using a Tyvek (R) sheet and RGB color analysis. Food Packag. Shelf Life. 19, 40–46 (2019)
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This study was carried out with the support of the “Research Program for Agricultural Science & Technology Development (Project No.PJ01247301)”, National Institute of Agricultural Sciences, Rural Development Administration, Republic of Korea.
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Kim, Y.H., Park, C.W., Kim, J.S. et al. Smart packaging temperature indicator based on encapsulated thermochromic material for the optimal watermelon taste. Food Measure 16, 2347–2355 (2022). https://doi.org/10.1007/s11694-022-01342-0
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DOI: https://doi.org/10.1007/s11694-022-01342-0