School of Environmental and Nature Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, China.
School of Environmental and Nature Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, China; Key laboratory of recycling and eco-treatment of waste biomass of Zhejiang province, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, China.
Int J Biol Macromol. 2024 Apr;264(Pt 1):130474. doi: 10.1016/j.ijbiomac.2024.130474. Epub 2024 Feb 28.
The biocompatible, biodegradable and strong polyvinyl alcohol-based films have been widely investigated and used in the field of active packaging. To endow with diverse function, this paper firstly prepared lignin nanoparticles loaded with potassium sorbate (LNP@PS) as additives to exploit additional antibacterial, UV blocking, oxygen barrier, and water barrier properties. Besides, tannin acid (TA) was incorporated for compensating and further enhancing mechanical properties. Results showed that the PVA-based composite films containing 3 % LNP@PS and 5 % TA could achieve the optimal tensile strength at 74.51 MPa, water vapor permeability at 7.015·10·g·cm/cm·s·Pa and oxygen permeability at 1.93 cm/m·24 h MPa, which was an 165 % of increase, 47 % and 112 % of reduction respectively compared to pure PVA films. Additionally, the composite films exhibited apparently superior bacteria and oxygen resistance properties evidenced by microbial infection and free radical scavenging performance. In addition, the slow-release effect of PS assisted the strawberry preservation with an extension of 3 days, which provided a promising novel route to prepare active food packaging material.
具有生物相容性、可生物降解和高强度的聚乙烯醇基薄膜已经得到了广泛的研究和应用，用于活性包装领域。为了赋予其多样化的功能，本文首先制备了负载山梨酸钾的木质素纳米粒子（LNP@PS）作为添加剂，以开发额外的抗菌、UV 阻断、氧气阻隔和水分阻隔性能。此外，还加入了单宁酸（TA）以补偿和进一步增强力学性能。结果表明，含有 3% LNP@PS 和 5% TA 的 PVA 基复合膜的拉伸强度达到了 74.51 MPa，水蒸气透过率为 7.015·10·g·cm/cm·s·Pa，氧气透过率为 1.93 cm/m·24 h·MPa，分别比纯 PVA 膜提高了 165%、降低了 47%和 112%。此外，复合膜表现出明显优越的抗菌和抗氧化性能，这可通过微生物感染和自由基清除性能得到证明。此外，PS 的缓慢释放效应有助于草莓的保鲜，延长了 3 天，为制备活性食品包装材料提供了一种有前途的新途径。
