期刊
POLYMER
卷 196, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2020.122466
关键词
poly(lactic acid); Covalent organic frameworks; Non-migration antioxidant activity
资金
- Spanish Government, Spain [MAT2016-77608-C3-2-P, MAT2017-84909-C2-2-R, FJCI-2017-33536]
- UCM, Spain
- Santander Group, Spain [INV.GR.00.1819.10759, Santander-UCM PR87/19-22628]
- Generalitat Valenciana, Spain [APOSTD/2019/201]
A 2D Covalent Organic Framework (named [HC C](0.5)-TPB-DMTP-COF) was synthesized and post synthetically functionalized with dopamine via Copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction (COFDOPA) to obtain 2D nanoparticles with antioxidant activity. COFDOPA nanoparticles were exfoliated into nanosheets (COFDOPA-e) and incorporated into plasticized poly(lactic acid) (PLA) matrix with 15 wt% of acetyl trybutyl citrate (ATBC) to develop non-migratory sustainable packaging. The effect of COFDOPA and exfoliated COFDOPA-e (in 0.5, 1 and 3 wt%) on the structural, thermal and mechanical properties of PLA-ATBC was studied. The bionanocomposites loaded with low amounts of COFDOPA-e (0.5 wt% and 1 wt%) resulted optically transparent and showed good interfacial adhesion, increased crystallinity, thermal and mechanical performance. Moreover, the overall migration level assayed in a fatty food simulant was below the migration limits required for food packaging materials and showed effective antioxidant activity. Thus, these bionanocomposites show great potential as non-migration antioxidant materials with interest in the sustainable food packaging field.
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