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Assessing Disaster Resilience of Concrete with Titanium Dioxide Nanoparticles
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Titanium Dioxide Nanotube-Based Oxygen Indicator for Modified Atmosphere Packaging: Efficiency and Accuracy.

Junwei Wen1, Shuting Huang2, Yu Sun3

  • 1School of Printing and Packaging, Wuhan University, Wuhan 430079, China. 2017202170020@whu.edu.cn.

Materials (Basel, Switzerland)
|December 2, 2018
PubMed
Summary

This study developed a novel titanium dioxide (TiO₂) nanotube-based oxygen indicator for modified atmosphere packaging (MAP). The indicator offers visual assessment of packaging integrity and food safety, enhancing non-destructive testing methods.

Keywords:
modified atmosphere packagingoxygen indicatorphotocatalytic activityscreen-printing methodtitanium dioxide

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Analytical Chemistry

Background:

  • Colorimetric oxygen indicators are crucial for non-destructive testing in modified atmosphere packaging (MAP).
  • Titanium dioxide (TiO₂) nanotubes show potential as semiconductor photocatalysts for oxygen sensing applications.

Purpose of the Study:

  • To synthesize and characterize TiO₂ nanotubes for use in oxygen indicators.
  • To develop a printable TiO₂-based oxygen indicator for MAP applications.
  • To evaluate the indicator's performance in assessing packaging integrity and food safety.

Main Methods:

  • Microwave-assisted hydrothermal synthesis of TiO₂ nanotubes.
  • Characterization using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET), and Diffuse Reflection Spectrum (DRS).
  • Formulation of the indicator with glycerol, methylene blue, and hydroxyethyl cellulose (HEC), followed by screen printing on PET films.

Main Results:

  • Synthesized TiO₂ nanotubes exhibited a rutile-anatase mixture with a high surface area (190.35 m²/g) and a wide band gap (3.34 eV).
  • The TiO₂-based indicator showed excellent photocatalytic activity, avoiding visible light excitation, and demonstrated good printability.
  • Application in MAP confirmed the indicator's ability to visually assess packaging integrity and food safety.

Conclusions:

  • The synthesized TiO₂ nanotubes are suitable for developing effective oxygen indicators.
  • The printable TiO₂-based indicator offers a reliable method for quality control in MAP.
  • This technology enhances food safety and packaging monitoring through visual cues.