Shi Xiu, Ju Fengxian, Wang Ruoxin, Xu Jing, Li Tianduo, Wei Tao, Lv Aijie, Yang Huan
School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China; School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
Food Chem. 2025 Jul 1;479:143814. doi: 10.1016/j.foodchem.2025.143814. Epub 2025 Mar 12.
Deformable collagen-based films with superior stability, flexibility and intelligent packaging capabilities remains a substantial challenge. Adopt inspiration from the pangolin's barrier, a biomimetic "rigid-flexible coupling" strategy was employed to develop multifunctional film (Col/DA/ZnO/BW) incorporating collagen (rigid matrix), dibenzaldehyde-terminated polyethylene glycol (DA-PEG, flexible cross-linker), ZnO nanoparticles (reinforcer) and black wolfberry anthocyanins (BW, pH indicator). Structural analyses revealed the uniform film matrix stabilized through covalent and hydrogen bonding. Notable improvements in packaging performances included low water vapor permeability (4.76 × 10 g s m Pa), favorable UV-light screening capacity (68.71 %), enhanced thermal stability (71.17 °C), superior tensile strength (78.64 MPa), strong antioxidant activity (72.09 % DPPH scavenging) and notable antibacterial efficacy. Moreover, profiting from the pH-responsive nature and excellent biodegradability, the intelligent film enables real-time monitoring of pork freshness and provides an eco-friendly alternative to conventional plastics. This multifunctional film holds great promise for sustainable food packaging, boosting food safety and minimizing environmental pollution.
制备具有卓越稳定性、柔韧性和智能包装能力的可变形胶原基薄膜仍然是一项重大挑战。借鉴穿山甲鳞片的灵感，采用了一种仿生的“刚柔耦合”策略来开发多功能薄膜（Col/DA/ZnO/BW），该薄膜包含胶原蛋白（刚性基质）、二苯甲醛封端的聚乙二醇（DA-PEG，柔性交联剂）、氧化锌纳米颗粒（增强剂）和黑枸杞花青素（BW，pH指示剂）。结构分析表明，通过共价键和氢键形成了均匀的薄膜基质。包装性能有显著改善，包括低水蒸气透过率（4.76×10 g s m Pa）、良好的紫外线屏蔽能力（68.71%）、增强的热稳定性（71.17°C）、优异的拉伸强度（78.64 MPa）、强大的抗氧化活性（72.09% DPPH清除率）和显著的抗菌效果。此外，得益于pH响应特性和出色的生物降解性，这种智能薄膜能够实时监测猪肉的新鲜度，并为传统塑料提供了一种环保替代品。这种多功能薄膜在可持续食品包装方面具有巨大潜力，可提高食品安全并最大限度地减少环境污染。
