A Self-Healing Nanofiber-Based Self-Responsive Time-Temperature Indicator for Securing a Cold-Supply Chain.

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ID: 92096
2020
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Abstract
Perishable foods at undesired temperatures can generate foodborne illnesses that present significant societal costs. To certify refrigeration succession in a food-supply chain, a flexible, easy-to-interpret, damage-tolerant, and sensitive time-temperature indicator (TTI) that uses a self-healing nanofiber mat is devised. This mat is opaque when refrigerated due to nanofiber-induced light scattering, but becomes irreversibly transparent at room temperature through self-healing-induced interfibrillar fusion leading to the appearance of a warning sign. The mat monitors both freezer (-20 °C) and chiller (2 °C) successions and its timer is tunable over the 0.5-22.5 h range through control of the polymer composition and film thickness. The thin mat itself serves as both a temperature sensor and display; it does not require modularization, accurately measures localized or gradient heat, and functions even after crushing, cutting, and when weight-loaded in a manner that existing TTIs cannot. It also contains no drainable chemicals and is attachable to various shapes because it operates through an intrinsic physical response.
Reference Key
choi2020aadvanced Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Choi, Sejin;Eom, Youngho;Kim, Seon-Mi;Jeong, Da-Woon;Han, Jongmin;Koo, Jun Mo;Hwang, Sung Yeon;Park, Jeyoung;Oh, Dongyeop X;
Journal advanced materials (deerfield beach, fla)
Year 2020
DOI
10.1002/adma.201907064
URL
Keywords
transparency foodborne illness self-healing nanofibers thermodynamic energy time-temperature indicators

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