首页|Development of time-pH indicator nanofibers from natural pigments: An emerging processing technology to monitor the quality of foods
Development of time-pH indicator nanofibers from natural pigments: An emerging processing technology to monitor the quality of foods
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NSTL
Elsevier
Colorimetric indicators produced from nanofibers have a high contact surface area, allowing better interaction of the indicator with the external environment. In this context, this study aimed to develop time-pH indicator nanofibers with natural pigments for use as an emerging technology in the control of food quality. The polymeric solutions were prepared with 13% (w v(-1)) polycaprolactone (PCL) and 6% (w v(-1)) poly (ethylene oxide) (PEO). The natural dyes added to the polymeric solution were curcumin and quercetin (2%, w v(-1)) with the addition of 0.5 or 1% (w v(-1)) of phycocyanin. Solutions with curcumin, quercetin, and phycocyanin only (2% w v(-1)) were also studied. The color change monitoring was performed for 24 h, followed up every 1 h, using buffer solutions (pH 2 to 7). The condition with 2% (w v(-1)) phycocyanin showed a color variation (Delta E >= 5) noticeable to the human eye in the pH range 3-6 in 5 h of analysis. Thus, the indicator developed with PCL/PEO nanofibers containing 2% (w v(-1)) of phycocyanin is a promising alternative in monitoring the quality of perishable foods, as it can visually estimate changes in pH over time.
NSTL
Elsevier
