Journal
FOOD HYDROCOLLOIDS
Volume 129, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2022.107643
Keywords
Pectin-based film; Calcium propionate; Polyvinyl alcohol; Recyclable film; Biodegradable material; Food packaging
Categories
Funding
- Key Scientific Research Group of Shaanxi Province [2020TD-009]
- Key Scientific Research Program of Shaanxi Provincial Education Department (Collaborative Innovation Center project) [20JY003]
- Science and Technology Plan Project of Xi'an Weiyang Districtgs [201907]
- Youth Innovation Team of Shaanxi Universities
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A facile method was proposed to prepare a pectin-based film with high mechanical strength and moisture resistance. Strong bonds, including ionic bond and crystalline domain, were introduced to enhance the film's properties. The pectin-based film exhibited outstanding fracture stress and recyclability, and showed satisfactory moisture resistance, light transmittance, and biodegradability in natural soil.
Pectin, a promising polysaccharide, has drawn increasing attention due to its renewability and abundance, but the poor mechanical properties and moisture resistance limit its applications. In this study, we proposed a facile method to prepare a pectin-based film with high mechanical strength and satisfactory moisture resistance via introducing strong bonds, including ionic bond and crystalline domain, counting itself abundance hydrogen bond forming multiple sacrifice bond synergistically for energy dissipation. Thus, pectin-based film exhibits an outstanding fracture stress of 12.7 MPa, which is 200% increase compared to that of original one. Due to the reversible property of these bonds, the pectin-based film appears perfect recyclability (three recycling cycles). Additionally, the hybrid pectin-based film also demonstrates satisfactory moisture resistance, good light transmittance, and favorable biodegradability in natural soil. Considering the demonstrated pectin-based film is ecofriendly and reliable, which represents a promising alternative to replace the non-biodegradable food packaging film.
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