College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China..
Int J Biol Macromol. 2022 Jun 15;210:654-662. doi: 10.1016/j.ijbiomac.2022.04.221. Epub 2022 May 2.
Bioinspired polydopamine (PDA) nanoparticles were synthesized and explored as functional compatibilizers in polyvinyl alcohol/starch (PVA/ST) matrix to develop high-performance multifunctional packaging film. The effect of the addition of PDA on the microstructural, mechanical, thermal, water vapor barrier, ultraviolet (UV)/high-energy blue light (HEBL) blocking, thermal insulating and antioxidant properties of PVA/ST composite films was fully investigated. Results demonstrated that the added PDA nanoparticles were evenly dispersed in the PVA/ST matrix, providing compact and dense nanocomposite films due to their compatibilization effect. Compared with virgin PVA/ST film, the resulting PVA/ST/PDA nanocomposite films exhibited greatly improved tensile strength, toughness, thermal stability, and water vapor barrier ability. Furthermore, the presence of PDA endowed PVA/ST composite film with excellent UV/HEBL blocking, thermal insulating as well as antioxidant functions. Thus, such high-performance multifunctional nanocomposite films hold the potential of protecting food quality against photothermal oxidative deterioration and extend food shelf life.
仿生聚多巴胺（PDA）纳米粒子被合成并探索作为聚乙烯醇/淀粉（PVA/ST）基质中的功能增容剂，以开发高性能多功能包装膜。研究了添加 PDA 对 PVA/ST 复合膜的微观结构、力学、热学、水蒸气阻隔、紫外线（UV）/高能蓝光（HEBL）阻隔、隔热和抗氧化性能的影响。结果表明，添加的 PDA 纳米粒子均匀分散在 PVA/ST 基体中，由于其增容作用，提供了致密的纳米复合材料薄膜。与原始的 PVA/ST 薄膜相比，所得的 PVA/ST/PDA 纳米复合材料薄膜表现出拉伸强度、韧性、热稳定性和水蒸气阻隔性能的显著提高。此外，PDA 的存在赋予 PVA/ST 复合薄膜优异的 UV/HEBL 阻隔、隔热和抗氧化功能。因此，这种高性能多功能纳米复合材料薄膜有望保护食品质量免受光热氧化劣化，并延长食品保质期。
