In-situ synthesis of zinc oxide-tannic acid-waste bagasse with antibacterial activity as multifunctional additive for packaging film

• Published in: Journal of cleaner production 2024-08, Vol.467, p.142934, Article 142934
• Main Authors: Zhang, Zixin, Li, Sheng, Liu, Xueying, Bian, Hedong, Huang, Guohuan
• Format: Article
• Language: English
• Subjects: Biodegradability; Food packaging films; Mechanical activation; Resource utilization; Waste bagasse
• ISSN: 0959-6526
• DOI: 10.1016/j.jclepro.2024.142934

The resource utilization of waste bagasse (SB) is a green and effective solution to reduce environmental pollution. However, traditional methods for recycling of bagasse have the technical bottlenecks, including, secondary pollution, low efficiency, high cost and small production scale. Here, we develop a novel mechanical activation technology to convert SB in situ into zinc oxide-tannic acid-SB (ZnO-TA-SB) with antibacterial activity as multifunctional additives for packaging films. Unlike traditional methods that demand harsh reaction conditions, this novel strategy for the resource utilization of SB is convenient, green, efficient and large-scale. The results show that the bactericidal activities of ZnO-TA-SB against E. coli and S. aureus are >99 %, confirming the strong spectral antibacterial activity of ZnO-TA-SB. With the addition of ZnO-TA-SB to carboxymethyl cellulose (CMC) film, the tensile strength, elongation at break, O2 barrier property of ZnO-TA-SB/CMC film are increased by 1.43, 2.49, 2.09 times compared with CMC film, respectively. Furthermore, ZnO-TA-SB/CMC film effectively keeps the appearance and freshness of strawberries for more than 18 days. Notably, ZnO-TA-SB/CMC film is easily degraded in soil and used as a nutrient for crop growth without secondly pollution. Therefore, this work develops a new strategy for the resource utilization of waste biomass, and obtains green, clean and high-value products from waste biomass. [Display omitted] •A green, efficient and sustainable strategy for the resource utilization of waste bagasse.•Waste bagasse is converted into high-value ZnO-TA-SB by mechanical activation.•The ZnO-TA-SB is used as multifunctional additive for packaging film.•The good biodegradable performance of ZnO-TA-SB/CMC will not cause environmental pollution.