期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 210, 期 -, 页码 654-662出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.04.221
关键词
Nanocomposite film; Polydopamine; UV/blue-light blocking; Thermal insulation; Antioxidant activity; Food packaging
资金
- National Natural Science Foundation of China [21504018, 21676062]
- Natural Science Foundation of Guangxi Province [2018GXNSFAA281131, 2020GXNSFAA159016]
- Program of the Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi [GXYSXTZX2017-II-3]
The addition of bioinspired polydopamine (PDA) nanoparticles to polyvinyl alcohol/starch (PVA/ST) composite films improves their mechanical properties, thermal stability, water vapor barrier ability, UV/high-energy blue light (HEBL) blocking, thermal insulating, and antioxidant functions. These multifunctional nanocomposite films have the potential to protect food quality and extend shelf life.
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.
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