Development of a BTB/TBA+ ion-paired dye-based CO2 indicator and its application in a multilayered intelligent packaging system

Ji Sou Lyu, Inyoung Choi, Ki Seob Hwang, Jun Young Lee, Jongchul Seo, So Yeon Kim, Jaejoon Han

Research output: Contribution to journalArticle

Abstract

Many visual indicators have been developed to provide product quality information through their incorporation into intelligent food packaging systems. In particular, the colorimetric changes undergone by the pH-sensitive dyes that are present in food packages can be used to monitor food quality without destroying the package. However, some difficulties remain in incorporating these dyes into commercial packaging materials because the dyes are often strongly hydrophilic, which leads to the migration of these dyes into food with high water contents through simple contact; additionally, these dyes do not easily mix with the hydrophobic polymers of packaging materials. To overcome these problems, we prepared a bromothymol blue (BTB)/tetrabutylammonium (TBA+) ion-paired dye and used it to produce a CO2-sensitive intelligent packaging film. Branched polyethylenimine was added to the indicator solution to improve the film's sensitivity to CO2. The formation of ion pairs was confirmed through Fourier transform infrared spectroscopy, and film characteristics, such as color changes in the presence of CO2 and thermal properties, were examined. Finally, we manufactured multilayered packaging films using the BTB/TBA+ ion-paired dye and used these to measure CO2 changes in kimchi packaging during the fermentation process. CO2 mediated color changes were easily visible to the naked eye, demonstrating the applicability of our sensor in commercial food packaging films.

LanguageEnglish
Pages359-365
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume282
DOIs
Publication statusPublished - 2019 Mar 1

Fingerprint

packaging
Packaging
Coloring Agents
Dyes
dyes
Ions
food
ions
Packaging materials
Bromthymol Blue
Color
color
Polyethyleneimine
fermentation
Fermentation
Water content
moisture content
Fourier transform infrared spectroscopy
Polymers
Thermodynamic properties

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Lyu, Ji Sou ; Choi, Inyoung ; Hwang, Ki Seob ; Lee, Jun Young ; Seo, Jongchul ; Kim, So Yeon ; Han, Jaejoon. / Development of a BTB/TBA+ ion-paired dye-based CO2 indicator and its application in a multilayered intelligent packaging system. In: Sensors and Actuators, B: Chemical. 2019 ; Vol. 282. pp. 359-365.
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Development of a BTB/TBA+ ion-paired dye-based CO2 indicator and its application in a multilayered intelligent packaging system. / Lyu, Ji Sou; Choi, Inyoung; Hwang, Ki Seob; Lee, Jun Young; Seo, Jongchul; Kim, So Yeon; Han, Jaejoon.

In: Sensors and Actuators, B: Chemical, Vol. 282, 01.03.2019, p. 359-365.

Research output: Contribution to journalArticle

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