Intelligent colorimetric pH sensoring packaging films based on sugarcane wax/agar integrated with butterfly pea flower extract for optical tracking of shrimp freshness

Sulafa B H Hashim; Haroon Elrasheid Tahir; Li Liu; Junjun Zhang; Xiaodong Zhai; Amer Ali Mahdi; Faisal Nureldin Awad; Mahmoud M Hassan; Zou Xiaobo; Shi Jiyong

doi:10.1016/j.foodchem.2021.131514

Intelligent colorimetric pH sensoring packaging films based on sugarcane wax/agar integrated with butterfly pea flower extract for optical tracking of shrimp freshness

Food Chem. 2022 Mar 30;373(Pt B):131514. doi: 10.1016/j.foodchem.2021.131514. Epub 2021 Nov 1.

Authors

Affiliations

¹ School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Rd., 212013 Zhenjiang, Jiangsu, China; Department of Food Technology, Faculty of Agricultural Technology and Fish Sciences, Alneelain University, Khartoum, Sudan.
² School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Rd., 212013 Zhenjiang, Jiangsu, China.
³ Food Research Centre, P.O. Box 213, Khartoum North, Sudan.
⁴ Department of Food Technology, Faculty of Agricultural Technology and Fish Sciences, Alneelain University, Khartoum, Sudan.
⁵ School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Rd., 212013 Zhenjiang, Jiangsu, China. Electronic address: zou_xiaobo@ujs.edu.cn.
⁶ School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Rd., 212013 Zhenjiang, Jiangsu, China. Electronic address: shi_jiyong@ujs.edu.cn.

PMID: 34802808
DOI: 10.1016/j.foodchem.2021.131514

Abstract

A novel pH colorimetric film was prepared from various sugarcane wax (SW) concentrations (1, 1.5 and 2% w/v) on agar matrix (Agr) combined with butterfly pea flower (BF) extract for monitoring the shrimp freshness. A combination of BF anthocyanins with SW as lipid (hydrophobic) showed different changes in color under acidic conditions (pH 2-6) with slight changes under alkalinity (pH 7-12), which matched the visual color changes of two different ammonia vapors (50 and 100 mmol/l). FTIR, XRD spectra, and SEM micrographs revealed that SW was effectively fixed into the Agr-BF network during the film-forming process. The different homogenized SW films enhanced the physical and mechanical properties without significant differences in elongation and water vapor permeability. Remarkably, SW films displayed complete protection against UV-vis light (0%) and valuable reduction in visible light. This study presents SW colorimetric films as promising natural derivatives for smart packaging in tracking food freshness.

Keywords: Agar; Biomarker; Butterfly pea flower; Intelligent packaging; Shrimp freshness; Sugarcane wax.

MeSH terms

Agar
Anthocyanins*
Colorimetry
Flowers
Food Packaging
Hydrogen-Ion Concentration
Pisum sativum
Plant Extracts
Saccharum*

Substances

Anthocyanins
Plant Extracts
Agar