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Updated: Sep 3, 2026

Bacterial Cellulose Spheres that Encapsulate Solid Materials
Published on: February 26, 2021
High-barrier bacterial cellulose/polyvinyl alcohol based active packaging material for food preservation
You Li1, Wenjia Han1, Qijun Ding1
1Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; State Key Laboratory of Green Papermaking and Resource Recycling, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
Abstract:
To attenuate the safety, food spoilage and growing eco-friendly concerns caucused by plastics used in packaging, green degradable materials with antimicrobial and high barrier properties are critical. Herein, a bacterial cellulose/polyvinyl alcohol based packaging film (PBPT) with high-barrier, excellent antimicrobial property and UV resistance was developed for food preservation. Bacterial cellulose (BC) was used to improve the gas barrier performance by hydrogen bonding interactions and in situ induced crystallization of polyvinyl alcohol (PVA) composites. TiO2 was added to form a "brick sand structure" with BC/PVA to further enhance the gas barrier effect. The composite film (PBPT) exhibited high oxygen barrier performance (oxygen permeability as low as 0.3995 cm3/m2.24h.0.1 MPa), good water repellency, oil resistance (packaged with oil-proofing ratings of up to 12 at both low and high temperatures) and solvent resistance (no significant change in film appearance after 7 days in five common polar solvents) together with UV resistance (near 0 % transmittance below 350 nm), and excellent antimicrobial properties (over 99 % against E. coli and Staphylococcus aureus). When used to package and preserve fresh-cut apples, PBPT demonstrated significant resistance to browning, making it a highly effective and versatile composite film material with significant potential in food packaging applications.
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