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Developing a cerium lactate antibacterial nucleating agent for multifunctional polylactic acid packaging film
Yincai Wu1, Xihai Hao2, Fenglong Lin3
1Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen 361021, China.
Cerium lactate (Ce-LA) additive enhances polylactic acid (PLA) packaging. This biodegradable material shows improved crystallinity and significant antibacterial properties against common bacteria.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- The packaging industry demands advanced material functionalities.
- Biodegradable polymers like polylactic acid (PLA) require modification to meet these demands.
- Multifunctional additives offer an effective strategy for enhancing PLA properties.
Purpose of the Study:
- To synthesize cerium lactate (Ce-LA) via precipitation.
- To integrate Ce-LA into PLA to create a functional composite material.
- To evaluate the impact of Ce-LA on PLA's crystallinity and antibacterial activity.
Main Methods:
- Precipitation method for cerium lactate (Ce-LA) synthesis.
- Incorporation of Ce-LA into polylactic acid (PLA) matrix.
- Crystallinity assessment and antibacterial efficacy testing against Staphylococcus aureus and Escherichia coli.
Main Results:
- Ce-LA significantly increased PLA's crystallinity, with 0.9% addition yielding a 77% improvement (39.35% total).
- PLA composites with 1.8% Ce-LA demonstrated high antibacterial rates: 93% against Staphylococcus aureus and 85% against Escherichia coli.
- The addition of Ce-LA successfully imparted both enhanced crystallinity and antibacterial properties to PLA.
Conclusions:
- Cerium lactate is an effective additive for enhancing polylactic acid.
- The developed PLA composite offers a promising solution for functional biodegradable packaging.
- This research contributes to the advancement of high-performance, eco-friendly packaging materials.
