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<p>The growing need for sustainable food packaging has driven interest in natural, biodegradable materials, such as plant-based starch biopolymers. This study focuses on the development and optimization of tamarind seed starch-based edible films, prepared with varying concentrations of starch and glycerol. The film formulation was optimized using response surface methodology was applied with two factors, namely, tamarind seed starch and glycerol, to study the physical and barrier properties of the edible films. The factors included starch (3–5%) and glycerol (2–5%) at a constant temperature of 100&#xa0;°C, resulting in 13 experimental runs. Key properties such as film opacity (22.17–30.18%), thickness (0.31–0.43&#xa0;mm), tensile strength (0.97–8.49&#xa0;MPa), elongation at break (247.58–601.12%), and water solubility (15.41–28.69%) were evaluated. The results showed that film thickness and opacity increased with higher starch and glycerol content, while tensile strength improved with higher starch levels. Glycerol addition enhanced elongation at break but also increased water solubility. The films effectively blocked UV–vis radiation and demonstrated reduced water vapour and oxygen permeability at greater thickness levels. An optimized film composition of 4.98% starch and 4.57% glycerol was identified, yielding a high desirability score of 0.911. Additionally, applying this edible coating significantly extended the postharvest shelf life of tomatoes during storage. The shelf life was extended to 15&#xa0;days under ambient conditions and 20&#xa0;days under cold storage.</p> Graphical Abstract <p></p>

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Development and optimization of tamarind seed starch-based edible coating for prolonging tomato shelf life

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • G. M. Praveen,
  • I. P. Sudagar,
  • R. Pandiselvam,
  • P. Rajkumar,
  • D. Uma,
  • R. Arulmari,
  • P. Aruna,
  • P. Krishnakumar

摘要

The growing need for sustainable food packaging has driven interest in natural, biodegradable materials, such as plant-based starch biopolymers. This study focuses on the development and optimization of tamarind seed starch-based edible films, prepared with varying concentrations of starch and glycerol. The film formulation was optimized using response surface methodology was applied with two factors, namely, tamarind seed starch and glycerol, to study the physical and barrier properties of the edible films. The factors included starch (3–5%) and glycerol (2–5%) at a constant temperature of 100 °C, resulting in 13 experimental runs. Key properties such as film opacity (22.17–30.18%), thickness (0.31–0.43 mm), tensile strength (0.97–8.49 MPa), elongation at break (247.58–601.12%), and water solubility (15.41–28.69%) were evaluated. The results showed that film thickness and opacity increased with higher starch and glycerol content, while tensile strength improved with higher starch levels. Glycerol addition enhanced elongation at break but also increased water solubility. The films effectively blocked UV–vis radiation and demonstrated reduced water vapour and oxygen permeability at greater thickness levels. An optimized film composition of 4.98% starch and 4.57% glycerol was identified, yielding a high desirability score of 0.911. Additionally, applying this edible coating significantly extended the postharvest shelf life of tomatoes during storage. The shelf life was extended to 15 days under ambient conditions and 20 days under cold storage.

Graphical Abstract