Substituting corn starch with wolf's fruit and butterfly lily starches in thermopressed films: Physicochemical, mechanical, and biodegradation properties.

Autor: de Paula Farias V; Rondonópolis Federal of University, Bachelor's Degree in Animal Science, Rondonópolis, Mato Grosso, Brazil., Ascheri DPR; State University of Goiás, Stricto Sensu Graduate Program in Agricultural Engineering, Anápolis, Goiás, Brazil. Electronic address: diego.ascheri@ueg.br., Ascheri JLR; Embrapa Food Technology, Physical Properties and Food Extrusion Laboratory, Guaratiba, Rio de Janeiro, Brazil.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Nov; Vol. 281 (Pt 2), pp. 136378. Date of Electronic Publication: 2024 Oct 09.
DOI: 10.1016/j.ijbiomac.2024.136378
Abstrakt: The industrial use of corn starch competes with food supplies, encouraging the investigation of native starches as an alternative for its partial replacement. This study aimed to analyze the effects of replacing corn starch (CS) with wolf's fruit (WFS) and butterfly lily (BLS) starches on the physicochemical, mechanical, and biodegradation properties of starch-based films. Plasticized (with glycerin and citric acid) and unplasticized films were prepared with a microwave (10 s) and by thermopressing (1.5 t/120 °C/2 min) and were analyzed for amylose, scanning electron microscopy, X-ray diffraction, and paste properties. Furthermore, the biodegradability of films was tested in two soils over 42 days. Our results show that BLS is not a suitable raw material to replace corn starch. WFS with 27.5 % apparent amylose content and granule size of 12.5 μm produced films with thickness, permeability, tensile strength, and elongation of ~110 μm, ~4.8 g (m.s.Pa) -1 , ~2.5 MPa, and ~2.9 %, respectively, similar to CS. The biodegradability of WFS film showed greater resistance (≤61.4 %), increasing with the addition of plasticizers (89-93 % for WFS302) or partial replacement of CS (73-91 % for CSWFS303). These findings indicate that WFS can partially or fully replace CS in thermopressed films.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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