Multi‐Functional Edible Film with Excellent UV Barrier Performance and Accurate Instant Ion Printing Capability

Abstract

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 Fe3+ ions or conventional ink, from which it is observed that the pattern printed using Fe3+ 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.

Edible Films from Carrageenan/Orange Essential Oil/Trehalose—Structure, Optical Properties, and Antimicrobial Activity

“…For example, UV radiation can cause the oxidation of lipid compounds, but there can also be an issue with the discoloration of food that makes food products less attractive for consumers [2,3]. Many different compounds can be used to improve these films' properties: tannic acid with modified microfibrillated cellulose films has UV blocking ability [4], and the addition of zein nanoparticles and olive oil in the starch-glycerol matrix decreases transmittance and improves the UV barrier [5]. The important advantage of edible packaging is that it is produced from natural materials, and accordingly, it can help to reduce synthetic waste.…”

“…Evaluation of antimicrobial activity based on overgrowth of microbial culture over the disc of edible films; evaluation scale 1-5 (1 = disc completely clean, whereas 5 = disc completely overgrown); therefore, + means antimicrobial activity (1,2) and -means no activity(3,4,5).…”

Biomimetic soy protein‐based exterior‐use films with excellent UV‐blocking performance from catechol derivative Acacia mangium tannin

“…The film was cut into pieces of 1 × 3 cm in size, and its UV‐blocking properties were determined by measuring light transmittance at wavelengths ranging from 200 to 800 nm using a U‐1901 spectrophotometer (Purkinje General Company, Beijing, China). The UVA blocking percentage of the specimens were calculated according to Equation ) 21 …”

Dialdehyde Modified Tree Gum Karaya: A Sustainable Green Crosslinker for Gelatin‐Based Edible Films

“…[1][2][3][4][5][6] Biopolymer-based edible films and coatings have gained popularity in recent years as they are environmentally benign and cost-efficient. [7][8][9][10] Food preservation using edible films or coatings is not a novel technique; for decades, they have been employed to keep food safe from deterioration. The tannic acid, ferulic acid, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide, polydopamine, and proanthocyanidin.…”

“…[ 1–6 ] Biopolymer‐based edible films and coatings have gained popularity in recent years as they are environmentally benign and cost‐efficient. [ 7–10 ] Food preservation using edible films or coatings is not a novel technique; for decades, they have been employed to keep food safe from deterioration. The most common and widely known examples include coating cellulose on meat and wax coatings on fruits and vegetables to preserve freshness.…”