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Multi‐Functional Edible Film with Excellent UV Barrier Performance and Accurate Instant Ion Printing Capability
Author(s) -
Wang Zi,
Tang Lirong,
Lin Fengcai,
Shen Yanping,
Chen Yandan,
Chen Xuerong,
Huang Biao,
Lu Beili
Publication year - 2020
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.202000043
Subject(s) - materials science , ultimate tensile strength , tannic acid , gelatin , chemical engineering , cellulose , aqueous solution , tannin , thermal stability , crystallinity , food packaging , composite material , chemistry , organic chemistry , food science , engineering
Using natural biomass resources to synthesize degradable membrane materials, which may replace traditional plastics, is one of the strategies that can reduce pollution. Herein, a mechanochemical method for preparation of degradable biofilm tannic acid‐modified microfibrillated cellulose (TA@MFC)‐G is proposed. The method involves modification of a microfibrillated cellulose (MFC) with plant polyphenol (tannic acid), followed by complexation with gelatin in an aqueous solution. Compared with pure gelatin film, MFC film has higher intrinsic crystallinity and thermal stability. Due to the synergistic effect of tannin and MFC, the mechanical strength and flexibility of the films are improved; its tensile strength is higher than 75 MPa and its elongation at break is as high as 13%. The films also have high UV blocking ability. Finally, the films are printed using Fe 3+ ions or conventional ink, from which it is observed that the pattern printed using Fe 3+ ions has higher solvent resistance and water repellency compared to that printed using conventional ink. This biodegradable film may have promising applications as food packaging materials or in other industries.