Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE Synthesis of self-healing resin and applications.

ABSTRACT
Oxidized Moringa oleifera gum (MOG), adipic acid dihydrazide (ADH), and polyvinyl alcohol (PVA) were combined to prepare a dual-crosslinked self-healing resin through chemical (acyl hydrazone) and physical (hydrogen bonding) interactions. Fourier transform infrared and proton nuclear magnetic resonance spectroscopy confirmed the formation of a dual crosslinked self-healing resin. The resin formed self-supporting films using the solvent casting method, followed by the coating on jute fabric to enhance mechanical strength, flexibility, and applicability for food packaging. The self-healing properties of films were analyzed qualitatively using an optical microscope and quantitatively using a rheometer and universal testing machine. Coated jute fabric (CJFs) with varying resin concentrations (1.56%–5.26% w/v) showed increased stiffness and improved thermal stability compared with uncoated jute fabric (UJF). The resin (5.26% w/v) indicates good chemical stability under all three acidic (pH 4.5), basic (pH 12), and aqueous mediums. Water vapor transmission studies for 10 days showed that CJF-5.26 provided the most effective moisture barrier. A two-month food storage test (75% RH, 30°C ± 2°C) confirmed enhanced preservation performance. The oxidized-MOG/ADH/PVA resin demonstrates potential for sustainable jute-based food packaging applications.