Simon Maia Gabriella, Ferreira Toledo Gabriel, Frey Schütz Guilherme, Marangoni Júnior Luís, Pioli Vieira Roniérik
Universidade Estadual de Campinas (UNICAMP), School of Chemical Engineering (FEQ), Campinas, São Paulo, Brazil.
Universidade Estadual de Campinas (UNICAMP), School of Chemical Engineering (FEQ), Campinas, São Paulo, Brazil.
Int J Biol Macromol. 2025 Aug;319(Pt 4):145710. doi: 10.1016/j.ijbiomac.2025.145710. Epub 2025 Jul 1.
The interaction between plant-based proteins and polyphenols holds great promise for developing active films derived from renewable sources. This work aims to develop pea protein isolate (PPI) films incorporated with 2 %, 6 %, and 10 % tannic acid (TA) for potential use in active food packaging. The SEM images showed films with a compact microstructure and with no apparent pores. Incorporating 10 % TA into the PPI films enhanced their tensile strength from 3.86 MPa to 6.45 MPa, reflecting a 67 % improvement. Despite reduced elongation at break compared to the control film, the 10 % TA incorporation maintained over 500 % elongation, as many commercial thermoplastics used in packaging. Moreover, the films containing TA exhibited significantly reduced water vapor permeability, with the 10 % TA formulation showing an 87.9 % decrease compared to the control sample. The films also demonstrated increased hydrophobicity, indicating enhanced moisture resistance, while simultaneously improving their optical properties through greater UV-light barrier efficiency. The incorporation of 10 % TA enhanced the antioxidant capacity of up to 61 % DPPH radical scavenging and created a 12.98 mm inhibition zone against Staphylococcus aureus. Therefore, the findings suggest that PPI-based films incorporating 10 % TA are promising candidates for sustainable active food packaging solutions.
植物性蛋白质与多酚之间的相互作用在开发源自可再生资源的活性薄膜方面具有巨大潜力。这项工作旨在开发含有2%、6%和10%单宁酸（TA）的豌豆分离蛋白（PPI）薄膜，用于活性食品包装。扫描电子显微镜图像显示薄膜具有致密的微观结构且无明显孔隙。在PPI薄膜中加入10%的TA可使其拉伸强度从3.86兆帕提高到6.45兆帕，提高了67%。尽管与对照薄膜相比断裂伸长率有所降低，但加入10%TA后仍保持超过500%的伸长率，与许多用于包装的商业热塑性塑料相当。此外，含有TA的薄膜的水蒸气透过率显著降低，10%TA配方与对照样品相比降低了87.9%。这些薄膜还表现出疏水性增强，表明防潮性提高，同时通过更高的紫外线阻隔效率改善了光学性能。加入10%TA可使抗氧化能力提高多达61%的二苯基苦味酰基自由基清除率，并对金黄色葡萄球菌产生12.98毫米的抑菌圈。因此，研究结果表明，含有10%TA的基于PPI的薄膜是可持续活性食品包装解决方案的有前途的候选材料。
