TiO2 incorporated into a blend of biopolymeric matrices improves film properties and affects the postharvest conservation of papaya fruits under UV light

Date published

2023-09-08

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2024-09-09

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Elsevier

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Article

ISSN

0308-8146

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Citation

Gomes de Menezes FL, de Lima Leite RH, Gomes dos Santos FK, et al., (2024) TiO2 incorporated into a blend of biopolymeric matrices improves film properties and affects the postharvest conservation of papaya fruits under UV light. Food Chemistry, Volume 433, February 2024, Article number 137387

Abstract

This work investigated the properties of chitosan-cassava starch biopolymeric films containing nanometric photoactive TiO2 particles for use in postharvest conservation of papaya fruits under UV light at a temperature of 15 ± 1 °C and a relative humidity of 90 ± 1 % for 24 days. Starch-chitosan blend films showed intermediate hydrophobicity and improved mechanical properties. The addition of 1 % TiO2 into the polymeric matrix of starch/chitosan (1:1) further improved the mechanical properties with solubility of 16.04 ± 0.41 %, visible transmittance of 31.76 ± 1.58 %, and reduced UV transmittance of more than 97 %. However, the addition of TiO2 exceeding 1 % led to the formation of agglomerates and excessive reduction in film transparency. UV exposure damaged the fruit peel and resulted in a higher weight loss. In contrast, the addition of 1 % TiO2 to the blend reduced the weight loss in light and dark by 7.12 ± 1.57 % and 5.27 ± 0.31 % respectively, and delayed fruit ripening.

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Github

Keywords

Chitosan/cassava starch nanocomposites, TiO2 nanoparticles, Carica papaya L., UV absorbing coatings, Edible fruit coatings, Postharvest quality preservation

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Attribution-NonCommercial-NoDerivatives 4.0 International

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