Self-Modification of Dynamic Network Valence Bonds in ZeinNFs via Post-Heat Treatment: Preparation of an Efficient and Environmentally Friendly Ethylene Adsorbent

Protein-based nanomaterials are among the most promising materials for gas adsorption due to their green properties and high surface area. However, the performance of these materials is susceptible to variations in temperature. This study examined the effects of postheat treatment (40 °C, 0–9 h) on the dynamic network valence bonds of zein nanofibers (zeinNFs) and their ethylene adsorption performance using theoretical simulations and experimental studies. With increasing durations of postheat treatment, up to 9 h, the diameter of zeinNF-9 reduced by 42.11%, the structure of the zein protein stretched, the total sulfhydryl groups increased by 13.03%, and the ethylene adsorption efficiency increased to 7.05 ± 0.05 mg/m³/h. Furthermore, incubation of TaiPo pear with zeinNF-9 for 20 days resulted in the most effective preservation performance. The above results demonstrate that zeinNF-9 is a highly efficient and environmentally friendly material for ethylene adsorption. These characteristics render it greatly promising for practical applications in fruit preservation.