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Enhanced Xylan/PVA Composite Films via Nano-ZnO Reinforcement for Sustainable Food Packaging
Lin Yao1, Hui Sun1,2, Chang Yu1
1College of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China.
Polymers
|April 26, 2025
Summary
This study developed enhanced biodegradable films using xylan, polyvinyl alcohol (PVA), and zinc oxide nanoparticles (nano-ZnO). Optimized films show improved mechanical strength and barrier properties for sustainable packaging solutions.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Petroleum-based packaging poses environmental challenges.
- Biodegradable alternatives are crucial for sustainability.
- Hemicellulose-based films offer potential but require performance enhancement.
Purpose of the Study:
- To develop high-performance biodegradable films from xylan/polyvinyl alcohol (PVA) composites.
- To investigate the effect of zinc oxide nanoparticles (nano-ZnO) on film properties.
- To optimize nano-ZnO content for enhanced mechanical, thermal, and barrier characteristics.
Main Methods:
- Fabrication of xylan/PVA composite films via solution casting.
- Incorporation of zinc oxide nanoparticles (nano-ZnO) at varying concentrations (0-2.5 wt%).
- Utilization of sodium hexametaphosphate (SHMP) as a dispersant and sorbitol for flexibility.
Main Results:
- Optimized films with 2 wt% nano-ZnO exhibited a 74% increase in tensile strength (26.15 MPa) and a significant decrease in oxygen permeability (0.50).
- Improved thermal stability and hydrophobicity (contact angle of 74.4°) were observed at optimal nano-ZnO loading.
- Excessive nano-ZnO (>2 wt%) led to agglomeration and compromised mechanical integrity.
Conclusions:
- Nano-ZnO modified xylan/PVA films demonstrate potential as sustainable, high-performance packaging materials.
- The synergistic use of SHMP and nano-ZnO enables tunable properties for eco-friendly materials.
- These findings support the advancement of biomass utilization in food preservation applications.
