Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 188, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.indcrop.2022.115669
Keywords
PVA; Chitin nanofibers; Lignin nanoparticles; UV shielding films; Properties
Categories
Funding
- National Natural Science Foundation of China [32001275]
- Provincial Key Research and Development Program of Shandong [2021CXGC010601, 2019JZZY010326]
- Foundation of State Key Laboratory of Biobased Material [ZZ20190207]
- USDA National Institute of Food and Agriculture [SD00H648-18]
- Taishan Scholars Program
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The environmental pollution caused by non-degradable packaging and the increasing demand for biodegradable food packaging materials have led to research on the design and development of multifunctional polyvinyl alcohol (PVA)-based films. Ternary nanocomposite films incorporating chitin nanofibers and lignin nanoparticles have been found to improve toughness, thermal stability, hydrophobicity, and UV-barrier properties, making them suitable for biodegradable food packaging materials and UV-shielding biomaterials.
Environmental pollution of non-degradable packaging and the increasing demand for biodegradable food packaging materials are driving research on the design and development of multifunctional polyvinyl alcohol (PVA)-based films. However, binary PVA blends are not suitable to satisfy the requirements for mechanical properties, thermal stability, hydrophobicity and UV-barrier properties of food packaging materials. Herein, ternary nanocomposite films have been fabricated by incorporating sustainably renewable chitin nanofibers (ChNF) and biomass-based lignin nanoparticles (LNPs) into the biodegradable PVA. Results suggest that addition of 5 wt% ChNF and 1 wt% LNPs improves the films toughness appreciably along with superior thermal stability and surface hydrophobicity. More importantly, these nanocomposite films are transparent but could shield 95% of the UVB (275-325 nm) and UVC (200-275 nm) radiation. The outcome is deemed to aid developing novel PVA-based for biodegradable food packing materials and UV-shielding biomaterials, and it provides a way to solve the pollution of non-degradable plastics.
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