Development of antimicrobial active films based on poly(vinyl alcohol) containing nano‐TiO_2 and its application in macrobrachium rosenbergii packaging

摘要

The antimicrobial poly(vinyl alcohol) (PVA) films incorporated with nano-TiO_2 werernprepared by solution blending-casting method. The effects of different nano-TiO_2rnaddition of 0%, 0.5%, 1%, 3%, 5%, and 7% on the characterization of PVA films werernstudied. The tensile strength of the film incorporated with 0.5% nano-TiO_2 was highest.rnCompared with the pure PVA film, the oxygen transmission rate, swelling ratiornand water vapor uptake ratio of the films containing 0.5%–7% nano-TiO_2 reducedrn0.4%–0.8%, 22.82%–81.79%, and 3.59%–10.7%, respectively. The transparency reducedrnsignificantly. The thermal stability and antimicrobial activity againstrnStaphylococcus aureus and Escherichia coli were improved. The storage study of macrobrachiumrnrosenbergii indicated that the Shewanella spp., Pseudomonas putida andrnAeromonas hydrophila could be inhibited by PVA films added with nano-TiO_2 and theirrnshelf-life was extended for 1–2 days. It was indicated that there’s a good prospect forrnapplication of these PVA films in the antimicrobial food packaging.