Article 2025 · 0 citations

Time-temperature-dependent structuring of corn starch biopolymer films under retrogradation conditions

Zhang, Shuo, Xu, Xin, Wang, Bin, Abd El-Aty, A. M.

Abstract

This study explores the structural evolution of corn starch-based films fabricated via the casting method under various thermal conditions and retrogradation times. Emphasis was placed on the molecular organization of the amylose and amylopectin chains. At a fixed retrogradation duration, increasing the processing temperature resulted in a progressive decline in the C-C bond density, amylose content, crystallinity, molecular order, and double helix formation. Additionally, the chain length distribution (CLD) shifted from longer B1 chains toward shorter A chains, and the polydispersity index (PDI) increased with increasing temperature. In contrast, under constant-temperature conditions, extending the retrogradation time led to increases in the C-C bond content, amylose proportion, and overall molecular order and crystallinity. Over time, the A chain content and the PDI decreased, whereas the B1 chains became more prominent. These insights advance the understanding of starch retrogradation mechanisms, contributing to the design of biobased films with tunable structural properties and supporting innovations in biodegradable packaging and resource-efficient material development.

Keywords

Fine structure different temperatures retrogradation time PHYSICOCHEMICAL PROPERTIES AMYLOPECTIN GELATINIZATION IMPACT SIZE

WoS Categories

Chemistry, Applied Food Science & Technology Nutrition & Dietetics

Sustainable Development Goals

Zero Hunger Good Health and Well-being

Citation

Journal: FOOD CHEMISTRY
Year: 2025
Volume: 496
ISSN: 0308-8146
eISSN: 1873-7072
DOI: 10.1016/j.foodchem.2025.146691
WoS UID: WOS:001596218600003

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