Journal
FOOD CHEMISTRY
Volume 334, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.127487
Keywords
PBAT; PLA; POSS; Compatibility; Biodegradable packaging film
Funding
- National Key RD Plan [2016YFB0302400]
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Agricultural Key Applied Technology Innovation Project of Shandong Province (2017) [6]
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The biodegradable films made of PBAT and PLA, incorporating POSS(epoxy)8 as a reactive compatibilizer, showed improved interfacial adhesion, mechanical properties, and gas permeability. The addition of POSS(epoxy)8 during film production can offer a simple strategy for producing high-performance biodegradable plastic packaging films.
Biodegradable films poly(butylene adipate-co-butylene terephthalate) (PBAT)/poly(lactic acid) (PLA) incorporated with nano-polyhedral oligomeric silsesquioxane (POSS(epoxy)8) as a reactive compatibilizer were developed by melt processing. Structural, morphological, mechanical, and gas permeability properties of the films were determined. H-1 NMR and GPC demonstrated that the POSS(epoxy)8 was chemically bound at the PBAT/PLA boundary phase via an epoxide ring opening reaction. SEM micrographs of impact fracture surfaces demonstrated the POSS(epoxy)8 improved interfacial adhesion between PBAT and PLA matrix. The mechanical properties of the PBAT/PLA films containing POSS(epoxy)8 were enhanced relative to pristine PBAT/PLA films. The water vapor, CO2 and O-2 permeability of the PBAT/PLA films were improved by POSS(epoxy)8 addition. PBAT/PLA films containing POSS(epoxy)8 were shown to be superior to pristine PBAT/PLA films and polyethylene films in food storage tests. Results suggest that POSS(epoxy)8 addition during PBAT/PLA film production offers a simple strategy for the production of high performance biodegradable plastic packaging films.
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