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The abundant sugar and water content make grapes highly susceptible to rot by pathogenic bacteria, which accounts for millions of dollars in revenue loss each year. Herein, to alleviate this problem, rot-proof bronopol embedded-polyurethane hybrid films (PBV) containing 3 g/100 g of Vitamin C (Vc) were developed by electrospinning. PBV films had the lowest water vapor transmission rate when compared to the other groups, with a value of 2.57 mg·cm−2·h−1 (23 °C, 75%), and achieved over 99.99% inhibition of E. coli , S aureus , and B. subtilis. For the PBV films packaged grapes, the content of organic acids increased by more than 10% and the weight loss rate was lowered by over 50%. More importantly, the production rate of CO 2 is 1.64 ppm·g−1·h−1 that can substantially delay grape ripening and spoilage resulting from transpiration. This study offers a facile manufacturing route to develop multifunctional composite films for grape preservation. • PBV film was prepared by electrospinning of TPU and intrinsically antimicrobial PBND.with intrinsic antimicrobial properties was prepared • Mechanical properties of PBV films are qualified for grape packaging. • Antioxidant capacity of PBV films can effectively preserve the nutrients of grapes. • This novel packaging films can reduce the respiration rate of grapes. [ABSTRACT FROM AUTHOR]

Manufacturing facile and low-cost wound dressings that simultaneously meet the needs of the entire repair process remains the major challenge of effective wound healing. Herein, a series of curdlan-tannic acid hybrid hydrogels were successfully fabricated through the annealing technique. Notedly, when the mixing weigh ratio was 1:1, the hydrogel exhibited excellent physicochemical properties, including swellability, degradability, water retention, porosity, and rheology. Additionally, the hydrogel did not display significant cytotoxicity to fibroblasts and the hemolysis rate at 12 h was 3%. Interestingly, the hybrid hydrogel showed multifunctional properties, including remarkable antioxidant, antibacterial, and rapid hemostasis effects reduce blood loss by 0.35 g, that were achieved through the temperature-dependent release of tannic acid. Moreover, a full-thickness skin defect animal model was used to verify that the multifunctional hydrogel could accelerate wound healing in vivo. These results suggest that this hybrid hydrogel is a promising candidate for the clinical treatment of full-thickness wounds. [Display omitted] • A novel curdlan/tannic acid hydrogel was prepared by annealing technology. • Curdlan/tannic acid hydrogel performed adjustable physicochemical properties. • The developed hydrogel represented high safety features on mammalian cells. • The developed hydrogel showed an outstanding effect on wound healing progress. [ABSTRACT FROM AUTHOR]